European from Fennoscandia: Archaean to Tertiary

Tecronoph~slcs, 195 (1991) 151-207 151 Elsevrer Scrence Publishers B.V , Amsterdam

Catalogue of palaeomagnetic directions and poles european from Fennoscandia: Archaean to Tertiary

L.J. Pesonen ‘, G. Bylund b, T.H. Torsvik ‘. *, S.-A. Elming ’ and S. Mertanen a ” L.ahorato~for Palaeomagnetwn, Geologrcal Survey of Fmland, SF-O-7150 Espoo. Fmlund geotravetse h Department of Geology, Unrversrty of Lund. S-223 62 Lund, Sweden ’ Department of Earth Scrences. Umversrty of Oxford. Oxford OXI 3PR UK ’ Depurtment of Applred Geoph.wcs. Lulei Umverslty of Technolog), S-9.51 87 LuleB, Sweden

(Received Apt11 9. 1990: revised verston accepted July 11, 1990)

ABSTRACT

Pesonen, L.J., Bylund. G., Torsvrk. T.H.. Elming, S.A. and Mertanen. S.. 1991. Catalogue of palaeomagnetrc dnections and poles from Fennoscandia: Archaean to Tertiary. In: R. Freeman. M. Huch and St. Mueller (Editors). The European Geotraverse. Part 7. Tecfonophyssrcs. 195: 151-207.

Palaeomagnetic data from Fennoscandta ranging from the Archaean to the Tertiary have been comprled mto a catalogue The data are presented in table format, ltsting Precambrian data accordmg to tectonomagmatrc blocks and Late Precambrian-Phanerozorc data according to geological periods. Each pole is graded with the modtfted Bncen-Duff classtfrcation scheme. The catalogue (complete to the end of 1988) contains 350 entnes from 31 tectonomagmattc blocks and/or geologrcal periods. Normal and reversed polanty data are listed separately to allow polanty asymmetries to be studied. Each entry also has an Indexed abstract summanzing relevant informatron. such as the age of the rock, the age of the natural remanent magnetizatron and the basis for the assigned reliability grade All the data are stored m the palaeomagnetic data bank, which will be updated annually wrth new data. The catalogue IS the basrc source of data for the mrcrocomputer-based palaeomagnetrc database for Fennoscandia now bemg compiled.

Introduction before they were amalgamated to form the present-day shields (e.g.. Irving et al., 1984; Pesonen. Palaeomagnetic data provide important tectonic 1987b). These studies have improved our under- information, and one of the most successful appli- standing of the tectonic evolution of the erogenic cations of palaeomagnetism has been the de- belts between the joined cratons (e.g., Van der termination of the relative positions of continents Voo and Channel, 1980). during Mesozoic times (e.g., Smith et al., 1980). In The palaeomagnetic technique in these studies the early 1980s palaeomagnetic data were also is based on a comparison of the apparent polar used to calculate the movements of the Pre- wander paths (APWPs) of source blocks (either cambrian shields during Proterozoic times (e.g., microplates, nappes, cratonic blocks or (entire con- Irving and McGlynn, 1981; Pesonen and Neu- tinents) at successive time intervals: (differences vonen, 1981). More recently much attention has between APWPs indicate relative movements be- been paid to the use of palaeomagnetic techniques tween blocks (see Irving and McGlynn. 1981 and to measure the past movements of the cratons Pesonen and Neuvonen, 1981). The basic require- ment for these comparisons is consensus among palaeomagnetists in constructing the APWPs. A

* Also at: Geologrcal Survey of Norway. P.O. Box 3006. literature review, however, demonstrates that this N7002 Trondheim. Norway is often not the case. For example. three different

0040-1951/90/$03.50 i 1990 - Elsevter Scrence Publrshers B V. All rrghts reserved APWPs have been proposed for Fennoscandia in 1986 m Espoo (Finland) (e.g.. xer Hoffman. during the Middle Proterozoic (Poorter, 1981: 1986. Pesonen. 1987a. and Pesonen et LA 1989) Pesonen and Neuvonen. 1981; Piper. 19X2), result- ing in contrasting tectonic and kinematic interpre- Sources of data tations for the evolution of this shield during Proterozoic times. There are two reasons for these The primary source of data was the first com- differences: (i) discrepancies exist in the palaeo- puter catalogue of palaeomagnetic directions and magnetic data and literature sources used by the poles from Fennoscandia published by LIhde and various authors, and (ii) the criteria used to select Pesonen (1985) and stored in the VAX-780 com- reliable data for building the APWPs vary. puter of the Geological Survey of Finland. How- The problems mentioned above can be resolved ever, this catalogue had several drawbacks. First, a by establishing a database of palaeomagnetic re- thorough review of the literature revealed that sults in which each pole has a reliability grade about 20% of the data were not included. Second, (e.g., Briden and Duff, 1981; Halls and Pesonen, the grading scheme of the palaeomagnetic poles 1982; Roy, 1983). The purpose of this paper is to used by t’ahde and Pesonen was not rigorous provide a complete catalogue (Table 2) of all enough (e.g._ see Pesonen et al., 1989). Third, the published palaeomagnetic directions and poles data were not always organized according to from Fennoscandia (i.e., since 1957 when mag- t~tonomagmatic block or geological period. netic cleaning methods were developed), and to In the present study, we first examined all the classify them using ObJective reliability criteria. In available publications dealing with palaeomagnetic contrast to previous catalogues of Fennoscandian and radiometric age data on Fennoscandia, re- palaeoma~etic data (e.g., Piper, 1980a; Pesonen stricting the survey, however. to the period during and Neuvonen, 1981). this one lists the data which magnetic cleaning methods have been in according to their tectonomagmatic source blocks use (i.e., only post-1957 data are used): the un- or age provinces. This procedure allows any move- cleaned data from before 1957 are considered ments between cratons, tectonic blocks or micro- unreliable. The L%hde-Pesonen catalogue was then plates to be studied with palaeomagnetic tech- critically reviewed and updated with new data. niques in much the same way as the relative Other very useful data sources for this work movements between continents are studied. were the palaeopole catalogues of Irving and Mc- The paper also seeks to compile the data into a Elhinny and their co-workers (e.g.. Irving and modern, microcomputer-based data bank (see Hastie, 1975; McElhinny and Cowley. 1978). The Pesonen and Torsvik, 1990), from which workers data from the Soviet part of the Fennoscandian can easily and rapidly retrieve data for the appli- Shield were extracted from catalogues published cations they are interested in. The applications of by Khramov (see McElhinny et al.. 1977). these data vary. For example, some workers might be interested in tectonic applications of palaeomagnetism as outlined above (e.g., Pesonen Recalculations et al., 1989) while others might use the data to study the behaviour of the Earth’s magnetic field In many cases the palaeomagnetic directions, in the past (e.g., Nevanlinna and Pesonen, 1983). pole positions and statistical parameters had to be This paper aims at presenting the data in a read- recalculated because they were not listed in the able table format following the method of Irving original papers, there were obvious errors in the and McElhinny (e.g., Irving and Hastie, 1975; original data or the data were presented in a McElhinny and Cowley, 1978). This work, which format different from that preferred in this cata- exemplifies Scandinavian co-operation, is related logue. Owing to these recalculations, our numeri- to the European Geotraverse Project (EGT) and is cal data may occasionally differ from those given a product of the Palaeomagnetic Working Group in the original papers. However, apart from a few established at the Second EGT Study Centre held instances these differences are small. L&de and CATALOGUE OF PALAEOMAGNETIC DIRECTIONS AND POLES FROM FENNOSCANDIA 153

Pesonen (1985) developed a software package to PLON) using the numerical method of Lahde and perform the necessary recalculations, and to dou- Pesonen (1985). Users of this catalogue should ble-check the results given in the original publica- remember that there is always a possibility of new tions. For example, in some instances (e.g., entry errors arising from recalculations. We are confi- QOS-005, Lie et al., 1969) the authors use the dent, however, that the double-checking method Fisher radius R for the mean direction in prefer- has minimized the number of such errors. ence to the 95% confidence circle ((~95) used in this paper. Similarly, in a few instances (e.g.. entry Source blocks G02-008, Larson and Magnusson, 1976), the pole position is stated without the semi-axes (dp, dm) Figure 1 shows the block division of Fennos- of the confidence oval. These can easily be calcu- candia used for the Precambrian palaeomagnetic lated provided the required parameters (i.e.. (~95 data (Pesonen et al., 1989). There are 23 and inclination of remanence) are given in the tectonomagmatic blocks or provinces. The divi- original papers. Further, about 10% of the papers sion is primarily based on published geochrono- do not report the latitude and longitude of the logical, tectonic, structural and geophysical maps sampling site (e.g., QO3-005, Rother et al., 1987). of Fennoscandia (e.g., Simonen, 1980: Eriksson These were calculated from the given palaeomag- and Henkel, 1983; Gorbunov et al., 1985: Gaal. netic direction (D, I) and pole position (PLAT, 1986: Gorbatschev and Gaal. 1987). Block names

Fig. 1. The tectonomagmatic block dwision of Fennoscandia. The numbers and block names are in Table 1. Block I6 refers to the B%ngfjlllet inlier and is marked here only approximately (without boundanes). See text and Pesonen et al. (1989). and the corresponding database codes (block reasons to believe that the magnetizatlnn age IS “keys”) are listed in Table 1 and follow the reasonably well established (e.g., entry QOU-004. nomenclature used by Bylund and Pesonen (1987) L&lie and Mitchell, 1982). and Pesonen et al. (1989). The catalogue itself is in Table 2, where each Explanation to the columns in the catalogue palaeomagnetic result yielding a palaeomagnetic pole is listed as a separate entry (i.e.. one line). The main headings in the catalogue (Table 2) Each entry is assigned to a source area (block, (e.g., the Karelian Craton) indicate the block magmatic province, geological period and so on) names (from Archaean to Late Precambrian) or listed in Table 1. Note that the block division in geological periods (from Late Precambrian/ Cam- Fig. 1 is not always unique with respect to the age brian to Tertiary). Each block also has a number of crystallization of the rocks or with respect to between slashes (e.g., block /l/, see Table 1) and the age of magnetization. For example, “palaeo- a letter code (e.g., AOl). which will be used as magnetically” the Sveconorwegian Province is “ keys” in the database (Pesonen and Torsvik, considered Late Precambrian (ca. 1100-850 Ma) 1990). because the majority of the palaeomagnetic and No isotopic data show a Sveconorwegian resetting Column 1: between 1100 and 850 Ma B.P.. even though the Each entry starts with an index number consist- crystallization age of these rocks may be much ing of seven digits: the first three digits indicate older (ca. 1500-1600 Ma; see Bylund and Peso- the block (or province) code used in the database nen, 1987). Thus, the poles are sometimes listed by (e.g., AOl) and the last three the entry number age of the source province and sometimes by the within the block or age group under consideration. estimated age of the magnetization (e.g., the Sve- conorwegian data). In numerous cases the magne- Column 2: Rock unit and/or component, country tization age is considerably younger than the ra- diametric age (e.g., entry SO3-013, Elming, 1985). This column gives the name of the rock unit This is a fundamental problem in palaeomagnetic and the remanence component. Country codes are databases, and it is therefore recommended that given next, with the following abreviations: B = the catalogue be used with caution. It is vital Bornholm (Denmark), F = Finland, N = Norway, always to study the results and interpretations of S = Sweden and U = Soviet Union. palaeomagnetic, radiometric and structural data as they appear in the original papers. For this Columns 3 and 4: LA T, LON reason, each entry is provided with an “abstract” (Appendix) giving the relevant background for the These colums give the geographic latitude (“N) final interpretation of the magnetization ages and and longitude (“E) of the sampling site. These reliablility grades. data were often absent from the original publica- Owing to the scarcity of data, rocks younger tions. They were therefore calculated from the than ca. 670 Ma are listed by geological period. pole position (PLAT, PLON) and remanent mag- There are ten such periods in the Late Pre- netization direction (D, I) using the numerical Cambrian-Phanerozoic time interval (Table 1). The method of L&de and Pesonen (1985), assuming a Quaternary data are omitted from the catalogue: geocentric axial dipole field (Irving, 1964, p.43). they will be compiled separately together with archaeomagnetic and lake sediment data. The ob- Column 5: B/N/n servation that the magnetization age and the crystallization or diagenetic age of the rock may differ This column gives the number of studies or also applies in particular to the Phanerozoic data. sites (B), the total number of samples (N) and the This is often the case when the primary age of the total number of specimens (n). An asterisk (*) in rocks is unknown, but there are good geological front of one of these numbers indicates the CATALOGUE OF PALAEOMAGNETIC DIRECTIONS AND POLES FROM FENNOSCANDIA 155 hierarchical level used in the statistical calcula- on more than two sites (or samples/specimens) tions of the Fisher parameters (see following col- were available. umns; Fisher, 1953; Irving, 1964, p. 53).

Column 1 I: age Column 6: p

This column gives either the radiometric age, This column indicates the palaeomagnetic radiometric age interval or the estimated age of polarity (p) of the remanent magnetization. We the rock or remanent magnetization. The error have used the same definition for polarity as bars refer to the 20 level, and in most instances Pesonen and Neuvonen (1981) where N = normal the ages were recalculated with the revised decay polarity, R = reversed polarity, and C is the com- constants given by Steiger and Jager (1977). We bined mean of these two polarity groups if both stress that it is often impossible to quo:e a single groups are present. If there is a significant (10”) value for the age of remanent magnetization: the difference in palaeomagnetic directions between data merely provide some clues to the age of the two polarities, the combined mean was not remanence acquisition. The abstracts fill in some calculated. Note also that whenever the two polar- of the background important for the ;lge values ities are listed together, the data from the original used, but the reader is always advised to study the tables, and sometimes even from the figures (e.g., original sources of the isotope data. entries B03-002 and 003) were re-sorted into two polarities. The concept of “mixed polarity” (M) is generally avoided in this catalogue. However, in Column II: m deformed sediments individual specimens sometimes reveal the two polarities superimposed dur- This column gives the radiometric dating ing demagnetization. Separation into two discrete method. The following abbreviations are used: polarity groups is then difficult. In such instances, a = geological age (stratigraphic or cr,oss-cutting the data are listed as M polarity (e.g., entry QOS- evidence), b = fission track, c = 39Ar-40>\r, d = K-- 002; Torsvik et al., 1987) and the mean direction Ar. e = Rb-Sr (mineral isochron), f= Rb-Sr and pole given refer to the dominant polarity. (whole rock), g = U-Pb. h = Sm-Nd. i = Pb-Th and j = Pb-Pb. Column 7 and 8: D and I Any supplementary minerals that have been used (e.g., biotite (hi ), feldspar ( fp), hornblende These columns give the declination (D) and (hb), pyroxene ( px), sphene (sp), muscsvite (mu). inclination (I) of the natural remanent magnetiza- zircon (zr ). apatite (ap) and baddeleyite ( bd )) are tion (NRM) after cleaning and after multicompo- mentioned in the catalogue or in the abstracts. nent analysis (if carried out).

Column 13: PLAT. PLON Column 9: a95

This column gives the palaeomagnetic pole a95 is the 95% confidence circle for the mean position (“N, “E) as calculated from the mean D, direction (Fisher, 1953). If the number of data (B, I by assuming an axial geocentric dipole field N or n) is less than three, a95 is shown in (Irving, 1964, p.43). The quoted palaeomagnetic parentheses. pole does not always agree with the quoted direction, in which case the error is either in the mean Column IO: k direction, the calculated pole or the given site coordinates. These are all taken into consideration This column gives the precision parameter k in the abstracts, and the entry is assigned a lower (Fisher, 1953) and was calculated only when data reliability than it would normally receive. C’olumn 14: dp, dm (most reliable) to D (least reliable). See also the next section. This column gives the semi-axes for the 95% confidence oval of the pole (in degrees). Column 18: Ref

Column 15: (A95) This column gives the key reference to the source of the original palaeomagnetic data. An A is the 95% confidence circle of the pole when asterisk (*) indicates that a recalculation was made. the calculation is based on site mean poles rather The key reference to the radiometric age is given than site mean directions (see Irving, 1964, p. 70) in the abstracts.

Column 16: t Modified Briden-Duff Grading

This column gives the method of demagnetiza- Each pole was graded into classes ranging from tion, where: a = alternating field (a.f.), t = thermal A to D on a modified Briden and Duff (1981) and c = chemical. scale. The scheme is shown in Fig. 2 . This scheme is not as rigorous as that used by Briden and Duff Column 17: g themselves because only about 10% of the Fen- noscandian poles satisfy the class A criteria, and This column gives the modified Briden-Duff no more than about 30% the combined class A-B (Briden and Duff, 1981; Pesonen et al., 1989) criteria. In our scheme we allocated the pole to the reliability grade for the entry, ranging from A B category if five or more samples (instead of ten

assessed from source teterences All paleaomagnebc data from Fennoscandla Smce 1957 and UP to 1988 Some recalculattons performed by present authors

YES &

1 pole estabhshed by sutflclent demagneNzallon of rocks using any combmatmn of thermal, a t or chemical demagneilZatlOn: edher NRM 1s a single stable component,or, 11 multlcomponenl. separate COmpOnentS have been d~slmqulshed I:* “D” po~e 2 ExperImental results (palaeomagneilc. rock magnellC, opaque PetrOlOgY etc ) fully documented

YES

4 NO 1 Suttwently large number of samples (1 5) 2 Moderate lo high preclslon (k 2 8) -p “C” pole 3 Rock umt age known lo wthm a period Or era 4 Tectomc studies performed

YES

1 NO

1 Age of magneruatlon established ,-i “B” pole 2 tumor asstgns toll reliabilily to pole

YES

“A” pole

Fig. 2. The modified Bride+Duff grading scheme for the palaeomagnetic poles (see Briden and hff (1981) ad pwen et al. (1989)). Each pole has been ranked with this scheme by answ&g “yes” or “no” to the qucdons swing from the top and moving lo the bottom. CATALOGUE OF PALAEOMAGNETIC DIRECTIONS AND POLES FROM FENNOSCANDIA 157 as used by Briden and Duff) were available, as to compute the mean palaeomagnetic directions there often are in Fennoscandian studies. Simi- for the two polarities separately. This was not larly, a pole falls into the B category (but not C) always possible, however. owing to lack of data in if its Fisherian precision parameter k is higher the original papers. If the difference in mean than 8 (Briden and Duff used k > 10). We admit directions is considerable (say, 10”) we did not that there is no truly objective method of grading calculate the combined mean direction but instead the poles, but we feel that our method is ap- give the two different means in order not to lose propriate and adequate for the present purpose. In the information on the polarity asymrretry (e.g.. assigning the grade we also emphasize the way in Pesonen and Neuvonen, 1981). In some cases the which the original authors assessed their own data. N and R data had to be digitized from original Problems were frequently encountered when re- figures (e.g., entries SO2-017 and SO2-018; Fridh. calculating data from original tables, and occa- 1979) to obtain the two mean directions. sionally even when extracting them from figures (e.g., entries 409-002 and 003; Storetvedt et al., Towards a palaeomagnetic database 1978). However, the recalculations were necessary in order to have all the published palaeomagnetic The catalogue presented in this paper forms the results in a consistent format to permit further core source of data for the microcomputer-based studies of the data (e.g., Pesonen et al., 1989). palaeomagnetic database now under construction (e.g., Torsvik. 1986, 1987; Pesonen and Torsvik. Polarity definitions 1990; Torsvik et al., 1990).

In this cataloque we have used the polarity Acknowledgements definitions of Pesonen and Neuvonen (1981). Be- cause of the considerable gaps in the Precambrian This paper is a product of the Palaeomagnetic APWP. the definition of “true” polarity is am- Working Group for the Northern Segment of the biguous. The polarity is normal (N) if the north- European Geotraverse. We thank Mary von Knor- seeking paleomagnetic direction yields a pole in ring for helping us at the second EGT Study the Pacific or in the Canadian Arctic. Otherwise Centre held in Espoo on November 5-22, 1986, the polarity is reversed (R). This is a sound defini- Sit-pa Teeriaho for word processing and Kirsti tion of polarity for the Phanerozoic data because Blomster for drawing the figures. The English was the APWP migrates from the Pacific area to the corrected by Gillian Hakli. The EGT Project is present Magnetic North Pole in the Arctic without supported by grants from the Academy of Finland big jumps. The only exception in choosing the (LIP) and the Swedish Natural Science Research polarity is the Late Precambrian/Cambrian pole. Council (G.B. and S.-A.E) because there is a large gap in the APWP between this pole and the Ordovician pole, and the polarity Appendix has not been well established (see discussion in Pesonen et al., 1989). Karelian Craton /l/ AOl, Archaean Note also that some workers (e.g., Abrahamsen, AOI-001 VarparsJtirur quartz dronte, F(A) 1977; Irving and McGlynn, 1981; Poorter, 1981;

Piper. 1987) have used polarity definitions which Age: 2680 f 3 Ma, U-Pb (Zr) on quartz-diorltlc pegrnatold are different from those applied in this paper. (Paavola, 1985). An Archaean basement unit cut by Nil& drabase dykes I Polarity asymmetry (see entry AOl-006). Located at the SW border of the Karehan Craton (block 1) m Finland. Used as key pole for the begin- ning of the APWP of the Fennoscandian Shield by Pesonen Because one of the main applications of data and Neuvonen (1981), Bylund and Pesonen (1987) and Pesonen catalogues is to study whether the N data differ et al. (1989). from the R data (polarity asymmetry), we decided Ref: Neuvonen et al. (1981). Central Lapland block /2/ JOl. Lappnnian

Age: 1830-1860 Ma (U-Pb, Zr; Huhma, 1981). JOI-001 Kuusamo &kes and greenstones. F(B) Tonalitic dykes exposed withm the Karehan Craton (block 1) are shghtly older than or coeval with the Svecokarelian Age: ca. 2160 Ma (U-Pb and K-Ar on sphene; Sakko. Haukrvesi lamprophyres m the Raahe-Ladoga Belt (entry 1971; Silvennoinen, 1985). so1 -009). These Lapponian (Jatulian) sequences of basaltic--sedrmen- Ref: Neuvonen et al. (1981). tary rocks act as the basal cover of the 2.7 Ga old Archaean basement. The sequence is composed of dykes, sills. effusive A01 -003 Ilsalmi gabbro - dlontes, F(B) basaltic rocks (greenstones) and sedtments (quart&es). The basalts are spilitized, and the dykes are mostly albitic m composition. The tilt test is positive and thus the pole position. Age: ca. 2160 Ma (Paavola, pers. commun., 1984). located on the “Jatuhan APW loop” of L%hde and Pesonen No observations that these gabbro-diotitic intrusions (1985). is probably primary. (Kauppinen. 1973) are cut by the Iisalrm diabase dykes (next Ref: Neuvonen (1975); see also Lahde and Pesonen (1985) entry AOl-004). Large scatter in direction. and Bylund and Pesonen (1987). Ref: Neuvonen et al. (1981).

Iniier in Central Karelia /l, 3/ 502, JaMian-Svecofennian AOI-004 Iualmr diabase dykes, F(C)

502-001 Age: ca. 2160 Ma, geological evidence (see AOl-003). Taivalkoskr - Syiite gabbro, F(C) Only three samples from each site studied. The palaeopole hes close to the other Jatuhan (2100 Ma) poles. Age: 244Ok 34 Ma (U-Pb, Zr; Kouvo, 1977). Ref: Neuvonen et al. (1981); see also Bylund and Pesonen Although the crystallization age of the gabbro IS well (1987). established at about 2440 Ma, there are inconsistencies in the isotopic data at ca. 1900 Ma, suggesting a resetting of the Zr age during the Svecofenman orogeny (see Huhma, 1984; A01 -005 Nihii diabase dykes II, F(C) Mertanen et al., 1987). This intrusion is one of the Early Proterozoic layered intrusions m northern Finland, Sweden Age: Either Jatulian (ca. 2160 Ma) or Svecokarehan (ca. and the USSR. Palaeomagnetic data were obtained without 1800 Ma) (Paavola, pers. commun., 1984: see also Pesonen, multicomponent analysis of the NRM. This NRM direction 1987b). most likely represents a Svecokarelian overprint direction, as Smce the dykes are metamorphosed, the direction of NRM suggested by more recent palaeomagnetic and age data, and by probably represents a Svecokarelian overprint at ca. 1800 Ma. a negative tilt test for this component (Mertanen et al., 1987). Two dykes studied. Ref: Neuvonen (1975). Ref: Neuvonen et al. (1981); see also Bylund and Pesonen (1987). 502-002 Hyyprc? metadiabases, F(C)

A01 -006 Ndsrii drabase dykes I, F(B) Age: 2200-2100 Ma (K-Ar; Sal&o, 1971). Two vertical dykes studied. The NRM directions show Age: ca. 2160 Ma (Vaasjoki, pers. commun., 1986). large scatter, possibly suggesting an overprint due to the Earth’s These enstatite-augite dykes appear fresh and less altered present magnetic field (PEF) (the dykes are much altered). than the Nils& dykes II (entry AOl-005). They are therefore Ref: Neuvonen (1975). likely to be of Jatulian (ca. 2160 Ma) age (Paavola, pers. commun., 1984). A positive baked contact test on the Nilsiii 302-003 Eno metadiabases. F(C) quartz-diorite (AO1-001) suggests that these dykes have preserved a primary NRM direction. However, the palaeomagnetic pole position is anomalous and implies a mag&ization age of Age: No age data available, but the palaeomagnetic pole about 1700 Ma. Pesonen (1987b) suggests that the anomalous implies a Jatulian age (ca. 2100 Ma) for these dykes. A Jatuhan poie could be related to block rotations in the Nilsill area as age is also possible from field evidence. evident from changes in dyke orientation in the area (Paavola, Three vertical dykes studied. The NRM directions after a.f. 1985). cleaning are highly scattered and may be contaminatd by the Ref: Neuvonen et al. (1981): Paavola (1985); Pesonen PEF. (1987). Ref: Neuvonen (1975). C’ATALOGUF OF PALAEOMAGNETIC DIRECTIONS AND POLES FROM FENNOSCANDIA 159

502-004 meon of metadrabases, F(B) Vazhmka-Pukhta sediments (see 502-009). Inconclustve baked contact test: the baked sediment direction doffers shghtly from Age: See 502-002 and 502-003; mean of entries 502-002 and that of the sill. Compare with 502-012. 003. Ref: Katseblin (1968a); McElhinny et al. (1977). Ref: Neuvonen (1975): Lahde and Pesonen (1985). JO_‘-012 Rybreka baked sedrments, V(D) 50-7-005 Va:hrnka - Pukhta, upper reversed polarity, U(C) Age: See 502-009 and 502-011. Age: ca. 1850-1950 Ma (Pb-Th and K-Ar data, together The directton of the baked sediments doffer hy about 20” wtth strattgrapmc evtdence; Katseblin (1968a,b). from the baking SIB (502-011) and from the unbabed sediments Thermal demagnetizatton experiments have venfied the (502-009). extstence of successtve reversals in the Vazhmka-Pukhta se- Ref. Katseblin (1968a,b): Llhde and Pesonen (1985). quence. Only three samples studied from the upper sequence (R polanty). Results probably corrected for tilt. lnlier in Central North Karelia /4/ 503, Svecofennian Ref. Katseblin (1968a.b); Lahde and Pesonen (1985).

JO3-001 Northern Kareha sana%one, V(C) JO?-006 Vazhrnka - Pukhta, uppermost normal polarrty. U(C)

Age: 1610-1870 Ma (McElhmny et al.. 1977) Age: See 502-005. Only four samples studied. Results prob- Ref: McElhmny et al (1977) ably corrected for tilt. Ref: Katseblin (1968a.b): Llhde and Pesonen (1985). JO3-002 Central Karelra sandstone (I), V(C)

JO_‘-007 Varhrnka - Pukhta upper normal polarrty, V(D) Age: No age data, but this sandstone unit nay correlate Age: See 502-005. Number of sites and samples not given. wtth entry 503-001. Ref: Katseblin (1968a.b): Lahde and Pesonen (1985). Ref: McElhinny et al. (1977)

JO_‘-008 Va:hrnka - Pukhta, lower normal polarrr_v, V(D) 503-003 Central Kareha sandstone (II), U(C)

Age: See 502-005. Number of sites and samples not grven. Age: 1610-1870 Ma (see 503-002). See entry JO3-002. Ref: Katsebhn (1968a.b): Lahde and Pesonen (1985). Ref: McElhmny et al. (1977).

JO?-009 mean Vazhrnka - Pukhta, normal polarity, V(C) 503-004 mean Central Kareha sandstones. U(C)

Age: See 502-006. Mean of entnes 502-006 to 008. Age: 1610-1870 Ma (see 503-003). Mean of entries 303-002 Data are probably tilt corrected. A baked contact test to 003 against a dtabase stll (502-011) was inconclusive. The Ref: McElhmny et al. (1977). palaeomagnetic dtrection suggests a Jatulian-Svecokarelian age of magnetization 503-005 Central Karelra dvkes, V(B) Ref: Katseblin (1968a,b); Lahde and Pesonen (1985).

Age: 1610-1870 Ma (estimated) (McElhinny et al. 1977). JO.?-010 Shoksha sedrments. V(B) Ref: McElhmny et al. (1977).

Age: 1850-1950 Ma (Katseblin, 1968a,b). These sedtments are stratigraphically below the Vazhinka- Lapland Gramdite Belt /5 / Mll, Late ArchaeawSvecofennian Pukhta sediments. Data probably corrected for tilt. Ref: Katseblin (1968a,b); Lahde and Pesonen (1985). EOI -001 AkuJiirvr quartz-dronte. F(B)

JO?-01 1 Onega - Rybreka ~111,U(B) Age: 1900-1925 Ma (U-Pb, Zr; Merilhnen. 1976) The NRM probably reflects uplift and cooling of the Age: Estimated age 16OC-1800 Ma (McElhinny and Cow- Svecokarelian orogeny affecting the Granulite Belt in northern ley, 1977). Data from the Khramov catalogue (McElhmny and Finland. Detailed thermal demagnetization studies reveal other, Cowley. 1977) are probably the same as those reported in but less common, magnetization components. Katseblin (1968a). i.e. from a sill intruding and bakmg the Ref: Pesonen and Neuvonen (1981); Pesonen (in prep.). EOI-002 AkuJiirvi pyroxene granuhte IN). F(D) (Svecofenruan). Accordmg to Mutanen (pers. commun 1974~. the gabbro is layered and yields a negattve trlt tcs(. \uggestmg Age: No age data, but these rocks are the same as those m that the NRM postdates the structural trltmg. Hugh-field al. entry EOl-001. demagnetizatton data often reveal evtdence of supenmposed Only one sample measured. NRM dtrectton (after a.f. de- components (see also entry SO3-002; Elming, 1985) whtch have magnettzatton) consistent with that of EOl-001. not been Isolated. Ref: Papunen et al. (1977). Ref: Strgzehus (1970); Pesonen and Strgzehus (1972): Pesonen and Neuvonen (1981). EOI -003 Akujtirvl pyroxene granulite (R), F(D) SOI -003 PohJanmaa gabbro - dlorrtes, F(B) Age: No age data (see EOl-002). Only two samples measured, but the NRM (after a.f. clean- Age: 1884 Ma (see Sol-001) mg) suggests reversed polarity (compare with Ml-001 and According to Pesonen and Stigzelius (1972). these rocks EOl-002). record the same synorogenic to late erogenic coohng as the Ref: Papunen et al. (1977). Yhvieska gabbro (entry Sol-002). The diorites are magnetically harder and more stable than the gabbros. EOI-004 MenesJdrvr granulites, F(D). Ref: Pesonen and Stigzelius (1972).

Age: No age data. SOI- Kiuruvesr drabase dykes, F(C) On the basis of palaeomagnetic data, Pesonen et al. (1989) argue that the Menesjarvi granulites represent a slightly deeper crustal level, and hence a slightly younger NRM, than the Age: No age data. Akujarvi granuhtes within the Granulite Belt. From field evidence (Marttila, pers. commun., 1985) the Ref: Papunen et al. (1977); Pesonen et al. (1989). Kiuruvesi-Pielavesi diabase dykes cut the Pielavesi and other synorogenic gabbros (see entry Sol-OlO), but no baked contact test has been made to determine whether the dykes record EOI -005 Loanrla diabase dykes, F(B) primary intrusion NRM or synorogenic cooling NRM. Ref: Neuvonen et al. (1981); Bylund and Pesonen (1987); Age: 998 + 80 Ma, Sm-Nd (Pesonen et al., 1986). Pesonen (1987b); this work. This dyke swarm is a manifestation of widespread Late Precambrian (Sveconorwegian) igneous activity m northern Fennoscandia. Three dykes trending NNE en-Echelon were SOI -005 Kiuruvesr gabbro - dlontes. F(B) studied. The swarm is associated with a distinct negative aeromagnetic anomaly. Positive baked contact test. Rock mag- Age: 1886 f 5 Ma (U-Pb, Zr; Marttila, 1981). netic (hysteresis) studies performed. Pole position suggests a These rocks are similar to the Rantasabni dmbases (see Svecononvegian age for the NRM with, however, a slight Sol-007). The Kiuruvesi hypersthene diorites appear older than departure from the Svecononvegian APW path, which led or coeval with the Kiuruvesi diabases (see SO1-004). Pesonen (1987) to propose a microcontinental model for the Ref: Kauppinen (1973); Neuvonen et al. (1981). evolution of the Sveconorwegian Province during the 1.2-0.9 Ga period. SO1 -006 mean Knuuvesr mtrustons, F(B) Ref: Pesonen et al. (1986); Pesonen (1987b); Pesonen et al. (1989). Age: 1886k 5 Ma (see Sol-005).Combined data of Sol-004 and 005. RMbe-Ladoga block /6/ sol, sve4!ofenIli8n Ref: see sO1-005.

SOI -001 Ylivieska gabbro (1). F(C) SOI -007 Rantasalmi dtabase dyke, F(C) Age: 1884 Ma (U-Pb, Zr; Helovuori, 1979). A synorogenic Svecofennian gabbro within the Raahe- Age: No age data. Ladoga Belt. Cross-cutting relationships suggest that these dykes are Ref: Puranen (1960); see also L;ihde and Pesonen (1985). slightly older than the granodiorites and the nearby Haukivesi lamprophyres (SO1-009) but younger than the Haukivesi SOI -002 Ylivieska gabbro (2), F(B) quartzdiorites (Sol-008). Estimated age ca. 1840-1880 Ma. The dykes trend NNE and are altered and cut by later faults. Age: 1884 Ma (see Sol-001). Palaeomagnetic data suggest that the dykes are coeval with the According to Pesonen and StigzeIius (1972), the NRM Iisalmi dykes (AOl-004). (after a.f. demagnetization) is synorogenic to late erogenic Ref: Neuvonen et al. (1981); Pesonen (1987). C‘/\TALOGUE OF PALAEOMAGNETIC DIRECTIONS AND POLES FROM FENNOSCANDIA 161

SOI -008 Haukwesr quartz dlortte, F(D) SO2-004 Aoa gramtes. F(D)

Age: No age data. Estimated age ca. 1880 Ma (Neuvonen Age: Estimated age 1800-1850 Ma (Johnson, 1979: L&de et al., 1981). and Pesonen.1985). These hypersthene quartz-diorites are slightly older than or Ref: Johnson (1979); Llhde and Pesonen (1985). coeval with the neighbouring Rantasalmi diabase dykes (see sol-007). SO?-005 ksa granrtes. F(D) Ref. Neuvonen et al. (1981).

Age: No age data. SOI-OOQ fiaukruesr lamproph.vres, F(A) Only one sample studied yieldmg a SubJotman N dmxtron. See also SO2-004. Age: 1837-1840 Ma (U-Pb, Zr, whole rock/ap; Huhma, Ref: Neuvonen (1970): this work. 1981, Neuvonen et aL.1981). Geologxal data suggest that these lamprophyres are younger than the Rantasalnu dlabases (SOI-007) and the SO?-006 .&a fampro~h~res. F(C) Ha&nest quartzdlorites (Sol-008). The lamprophyres trend roughly N-S and are generally less than 2 m in width. They Age: No age data. are often porphyntlc and very fine gramed and presumably The lamphrophyres Intrude the Ava Ring FormatIon (Ava represent shallow crystalhzation depths. gramte, 502-004 and 005). Remanence dIrections resemble the Ref Kauppinen (1973); Neuvonen et al. (1981); Lauk- mtermedlate NRM dlrectton recorded in many SubJotnian kanen (1987). dykes (Pesonen and Suommen, m prep.***). Ref: Johnson (1979): Llhde and Pesonen (1935)

StJi-010 PAmessr gab&-o, F(3) SO?-007 Aua amphrbohtes, F(D) Age, 1892k14 Ma (U-Pb. Zr; Helovuon. 1979; Aho.

1979). Age: Estimated age ca. 1850 Ma (Johnson, 1979) Thts gabbro probabty represent the same synorogenic Only two samples measured, but the dIrectron IS a typtcal (Svecofenman) mtrusion pulse as the PohJanmaa gabbros SubJotnian R polanty (cf. entry B02-006), suggesting remagne- wlthin the Raahe-Ladoga Belt. According to Marttila (pers. tizatlon at about 1600 Ma. commun.. 1985) this gabbro IS cut by diabase dykes (entry Ref: Johnson (1979); thx. work so1 -004). Ref: Pesonen and Neuvonen (1981). SO2-008 AOva monzonttes. F(C)

Central Sweden-south Finland block /7/ SO2, Svecofennian Age: 16~-1830 Ma (U-Pb, Zr and geologtcal evtdence: Kouvo, pers commun., 1981) SO-7401 Serlr gabbro anorthosries, F(D) DIrections scattered, but yreld roughly a SubJotnian N polarity pole; could be due to remagnetlzation A8e Estxmated age ca. 1850 Ma (Llhde and Pesonen, Ref: Johnson (1979); Neuvonen (1970): L&hde and Pesonen 1985). (1985). NRM very unstable and dIrectIons scattered. Ref: Johnson (1979); L&de and Pesonen (1985). SO?-009 Aua monzonttes. F(C)

SO?-002 Se& arnpht~~ttes. F(D) Age: 1670-1830 Ma (U-Pb, Zr: Neuvonen. 1970).

Age: Estimated age ca. 1850 Ma (L&de and Pesonen. DirectIons scattered, but they plot close to SubJotnian N data (e.g., entry B02-005). See also entry SO2-008. 1985). Very unstable. Ref: Neuvonen (1970). Ref: Johnson (1979): L%hde and Pesonen (1985). SO2-010 Fijglb granodtonre. F(D) SO2-003 Aoa mrgmafrtes. F(D) Age: ca. 1890 Ma (U-Pb. Zr: Johnson, 1979; Suominen. Age: Estimated age ca. 1850 Ma (L&hde and Pesonen. 1987). 1985). Only two samples studled yteldmg a SubJotman R dlrec- The two samples studied show large scatter. tion, suggesting remagnetlzation at around 1600 Ma. Ref: Johnson (1979); Llhde and Pesonen (1985). Ref: Johnson (1979): ths work. SO?-01I Fogltj guhhro. F(D)

Age: Estimated age 1800 Ma (Johnson. 1979). Age: 1850+ 130 Ma (Rb-Sr. Frtdh. 1979). Only four samples studied yielding a Subjotnian N direc- Reversed polarity dykes. tion, suggesting remagnettzation at around 1600 Ma Ref: Fridh (1979); see also Bylund and Pesonen (1987) and Ref: Johnson (1979); Lahde and Pesonen (1985). this work.

SOZ-OIR Nordmgri thk6ldscvk dukes (N). S(C) SO,?-012 Ridmans gabbro, S(B)

Age: See SO2-017 Age: ca. 1750 Ma (Rb-Sr; Welin, 1966); ea. 1475-1750 Ma Normal polarity dykes. Note that the reversal m thts dyke on the basis of Prper’s (1980a) interpretation of palaeomagnetic swarm is very close to 180”. results Ref: Fridh (1979); see also Bylund and Pesonen (1987) and The gabbro mtrudes Svecofenman granites and gneisses. this work. The NRM resides in Ti-poor magnetite. Demagnetization (both a.f. and thermal) reveals stable end points. Ref: Piper (1980a). SOZ-019 &tskiil&.vk dykes (C). S(B)

Age: 1850f 130 Ma (see SO2-017; Fridh, 1979). Combined SO2-013 Ridmans dyke, S(C) mean of SO2-017 to SO2-018. Ref: Fridh (1979); Bylund and Pesonen (1987). Age: 1475-1750 Ma (this dyke cuts the gabbro of entry SO2-012). The NRM direction differs significantly from that of SO2-020 Hime dolentes, F(D) the gabbro and is of opposite (reversed) polarity. Ref: Ptper (1980a); Byhmd and Pesonen (1987). Age: 1550-1800 Ma (U-Pb. Zr: Lattakari, 1969). The NRM is very soft and attributed to PEF contamina- SO2-014 Uppsala metabasrte dykes, S(B) non. Several dyke swarms of different ages are present. Ref: Neuvonen (1967); Palmu (1982).

Age: No age data. NRM is of N polarity; cf. entry SO2-013. SO2-021 Keuruu N Dykes, F(A) Ref: Piper (1980a).

Age: ca. 1880 Ma (U-Pb, Zr; Kouvo, pers. commun., 1981; SO2-015 Aimunge me&ante dykes, S(C) Pesonen and Neuvonen, 1981). The Keuruu dyke swarm strikes N315E wtth a subvertical dip. The width varies from a few centimetres to 100 m. Chilled Age: Probably ca. 1570 Ma (Kresten et al., 1977). margins are visible against Svecofennian granodtorite and gab- The NRM is of R polarity (see also SO2-013) and may be a bro. The texture is ophitic and the gram size is fine. The remagnetization due to the nearby Almunge alkaline rocks, intrusion NRM was established with detailed demagnetizatron wmch are dated at 1570 Ma (Kresten et al.. 1977). and a positive baked contact test. Demagnetization data, how- Ref: Piper (1980a). ever, also occasionally reveal an intermediate component (i.e. a direction between N and R).

SO2-016 Bo dronte, S(B) Ref: Pesonen and Neuvonen,(1981); Palmu (1982); Pesonen (In prep.).

Age: from palaeomagnetic evidence, Piper (1980a) suggests an age of 1740-1880 Ma. SO2-022 Keuruu R dykes, F(B). Although located close to the Halleforsnls dyke (BO3-014, age ca. 1550 Ma), it does not seen to have been affected by the Age: See SO2-021. intrusion of this dyke. Instead, a Svecofennian direction is A group of R polarity dykes. Note the reversal asymmetry preserved. However, two haematite-bearing samples show a with SO2-021. Positive baked contact test. The R direction is Sveconorwegian overprint (with an estimated direction of D = very close to that of SO2-013 (Rhdmansii dyke. R polarity) 290”. Z = - 35”), which is very close to the hb component of and SO2-015 (Almunge dykes, R polarity; see alsoBylund and the HiUleforsnils dyke (BO3-015) and to the direction obtained Pesonen. 1987). from the nearby Bo dyke (POl-014) of Sveconorwegian age. Ref: Pesonen and Neuvonen (1981); Palmu (1982); Pesonen Ref: Piper (1980a); this work. (in prep.). CATALOGUF OF PALAEOMAGNETIC DIRECTIONS AND POLES FROM FENNOSCANDIA 163

SO_‘-023 Keuruu R_’ dkjke, F(D) SO3-002 Tiirendb gabbro 2, S(A)

Age: See SO2-022. Age: Age of ca. 1850 Ma often quoted m the Itterature. but This may be one of the above Keuruu R dykes (entry the magnetization age may be ca. 1757f47 Ma to 1780 Ma SO?-022). but it is treated separately because the NRM direc- based on Rb-Sr datmg (see Elming, 1985). Note that thermal tion is different (cf. SO2-022). demagnettzation data reveal a trend towards steep (positive) Ref. Lahde and Pesonen (1985); Pesonen (m prep.). mclinations at high temperatures (see also Pesonen et al, 1989). SO-7-024 South F&and mtrwons, F(B) Ref. Elmmg (1982. 1985): Pesonen et al.. (1989).

Age. Geological evidence suggests an age of around 1880 SO3-003 Tiirendij gabhro 3 (sites 3 und 8). S(C) Ma (Neuvonen. 1974) Site mean NRM data after a.f. demagnettzation fairly Age: ca. 1757-1780 Ma (see Elming. 1985). scattered, but record a typical Svecofennian N polarity direc- Inchnations shallower than in entry SO3-004. May reflect tion the end of slow coolmg and uphft of the terrain. Ref. Grundstrom (1967); Neuvonen (1974). Ref: Ehning (1985).

SOLO_ Tammela mtrusrons, F(C) SO3-004 Tiirendii granmc &,kes, S(C) Age: ca. 1880 Ma (see SO2-024). Only a f. demagnetlzatton studies; the Inclination is quite Age: Estimated age ca. 1757 Ma (see SO3-OO;.). steep compared with other synorogemc Svecofennian data (e.g., These dykes cut the gabbro and are therefore coeval or entry SO2-024). shghtly younger in age. Only five samples studied. Ref: Grundstrom (1967); Neuvonen (1974). Ref: Comwell (1968).

SO?-O-76 Mtkkeh mtrus~ons, F(C) SO3-00.5 Tiirendii actdlc rocks. S(B)

Age: ca 1880 Ma (see SO2-024). Age: Esttmated age ca. 1850 Ma (see SO3-OO:!). Only a.f. demagnetlzatton data. This entry includes the granitic. syemtic. migmatttic and Ref: Gnmdstrom (1967): Neuvonen (1974). gramtic dykes (SO3-004) near the Tarendo gabbro. Only a.f. demagnetized (up to 15 mT). SO?-027 H_wrnk&? gabbro. F(B) Ref: Cornwell (1968).

Age. 1875 Ma (U-Pb, Zr: H&me. 1978). Based on a.f. demagnetization data only. Petrophysical SO3-006 Nottriisk gahbro, S(A) studies Included. Ref: Puranen (1973) Age: 1840+ 390 Ma (Rb-Sr: Wehn et al.. 1970) Thermal demagnetization shows steepemng Jf the inclma- SO?-O-78 Luontan granodtortte, F(C) tion at higher temperatures. Ref. Elming (1982, 1985). Age: 1765-1790 Ma (U-Pb, Zr; Kouvo. pers. commun., 1981) Undeformed rock unit apparently younger than the SO3-007 Nottriisk gabbro (sate 7). S(D) surrounding Svecofenman rocks. NRM stability varies. Ref. Neuvonen (1978). Age: ca. 1840+ 390 Ma (Wehn et al., 1970). Only three samples studied. but they deviate markedly North of Skellefte% block /8/ S03, Svecofennian from the other sites m entry SO3-006. Ref: Elmmg (1982. 1985). SO3-001 T&-end6 gabbro 1. S(C)

SO3-008 Nottriisk gabhro (site 1). S(D) Age: ca. 1850 Ma (Cornwell, 1968). Accordmg to Elming (1985) the magnetization may refer to ca. 1757-1780 Ma, as suggested by Rb-Sr dating on the Age: ca. 1840 f 390 Ma (Welin et al.. 1970) surrounding rocks Study based on a.f. demagnetization only The NRM of this site shows westerly dechnations as does (maximum field 15 mT); cf. SO3-002. entry SO3-003. Ref: Cornwell (1968) Ref: Elmmg (1982, 1985). Age: ca. 1725-1880 Ma (Rh-Sr and lr-Pb (Zr). Skrold, Age: See SO3-013 1982). Anomalous site HX. The NRM of tins gabbro may reflect the baking effect of Ref Elmmg (1982, 1985). the adjacent granites dated at 1725& 16 Ma to 1780&4Q Ma (Rh-Sr; Welin et al., 1970). A.f. and thermal demagnetization SO3-016 Dundret gabbro (me lo), S(C) drsplays a general NRM trend from a moderate, gentle NNW dnection to a steep NW direction. This entry consrsts of higher Age: See SO3-013 coercrvny (hc) data. Anomalous site HlO. Ref: Elming (1982, 1985). see also Pesonen et al. (1989). Ref: Elming (1982, 1985).

503-010 Svuppavaara gabbro 2 (1~). S(C) SO3-017 Dundtet basic rocks (R), S(C)

Age: 1725-1880 Ma (Rb-Sr and U-Pb (Zr); Welin et at.. Age: Not dated dtrectly; ages of nearby rocks vary from 1971, Skiold: 1982). 1850 Ma (U-Pb) to 153O~t35 Ma (Rb-Sr; Welin et al.. 1971: Skiold, 1982; see also entry S03-013). This entry fists the low coercivrty (ic) dtrection of the The NRM direction most probably reflects the ttme of NRM. Ref: Elming (1982, 1985). coohng of the nearby Lma granites 1530 Ma ago. Both polan- ues are present; this entry ltsts the R polanty data. Demagne- SO3-011 Vzttangi gabbro i, S(A) tization yields two components (low and high coercivity groups) which are not properly isolated; see also entries 503-013 to Age: ca. 1707-1880 Ma. Adjacent granodiorite gives an age 016). of 1707+77 Ma (Rb-Sr; Skiold. 1982). Ref. Piper (198Oa). Thermal d~a~et~tion does not reveai a steepening of mclinations as in entry SO3-003 and SO3-009. SO3-018 Dundret basic rocks (N), S(C) Ref: Elming (1982, 1985). Age: ca. 1530t 35 Ma (Rb-Sr; Wehn et al., 1971, see entry 503-012 fitfangr gubbro 2, S(C) S03-017). Ths entry lists the N polarity data. Ref: Piper (1980a). Age: 1707-1880 Ma (see SO2-011) Data from two sites. Compared to NRM directions of snnilar gabbro mtrusions. these are anomalous. S03-019 Ku/lax gabbro, S(C) Ref: Elming (1982, 1985). Age: Not dated dtrectly. A-ding to Piper (198&), however, this gabbro has the same history as the Svappavaara and SO3-013 R~dret gabbro (sate 71, S(C) Sangis gabbros (entries SO3-009 and sQ3-027): hence the estimated age IS ca. 1740 Ma. Age: 1890-1950 Ma (K-Ar; Magnusson, 1960). Similar The NRM most probably represents slow cooling and ages obtained from volcanic rocks north of the Dundret gab- uphft of the terrane. Both low (lb) and high (hb) blocking bro, but the age may be too high; the adjacent Lina gramte temperature components are present; the lb component ap- yields an age of 1530535 Ma (Rb-Sr; Welin et al., 1971), pears to be the younger (see also Store Lulevattnet gabbro, which may represent the age of the NRM for the Dundret entries SO3-030 and SO3-031). gabbro. Ref: Piper (1980a). Two generations of magnetite were isolated in petrologtcal studres. The final remanence direction was estimated using s03-020 KaKai/axgabbro (ib), S(B) intersecting great circle methods. Ref: Elming (1982, 1985). Age: ca. 1740 Ma (see SO3-019). Low biocking temperature (lb) component. SO3-014 Dundret gabbro R, S(3) Ref: Piper (1980a).

Age: See SO3-013. SO3-021 KaIlax gabbro (hb}, SrC) R polarity sites 1, 3, 4 and 12. Ref: Bming (1982, 1985); see also Piper (198Oa) and entry Age: ca. 1745-1880 Ma; probably slightly older than entry so3-017. SO3-020. CATALOGUE OF PALAEOMAGNETIC DIRECTIONS AND POLES FROM FENNOSCANDIA 165

High blockmg temperature (hb) component. SO3-029 Sangrs gabbro (lb). S(C) Ref: Ptper (1980a). Age: 1530-1770 Ma (see SO3-027). SO3-022 Kallax gabbro 2, S(B) Site 11 represents low blockmg temperature components (lb) m pyrrhottte. Age: See entry SO3-019. Ref: Piper (1980a): Llhde and Pesonen (1985) Ref: Ptper (1980a); L%hde and Pesonen (1985). SO3-030 Siore Lulevattnet gabbro (hb), S(B) SO3-023 Korstriisk gabbro, S(B) Age: ca. 1530-1770 Ma (Rb-Sr, Welin et al.. 1971) Age. Not dated directly, but nearby rocks record ages Hugh blocking temperature (hb) data from si es 17. 18(n) between 1530 and 1770 Ma (see entry SO3-018, Wehn et al., and 22(u). residmg in hemotlmemte. 1971). Ref: Piper (1980a) NRM ts composed of a single stable component. Ref: Ptper (1980a). SO3-031 Stem Lulevattnet gabbro (lb), S(B)

SO3-024 Nlemrsel gabbro, S(B) Age: 1530-1770 Ma (see entry SO3-023 to -029). Low blockmg temperature (lb) data from five sues. Age: ca. 1530-1770 Ma (see entry SO3-018; Welin et al.. Ref: Ptper (1980). 1971). A stable NRM component of N polarity. SO3-031 Jokkmokk basic rocks (Ic). S(D) Ref Ptper (1980a). Age: Not dtrectly dated, but may be of the same age as the SO3-025 Nremrsel dykes. S(B) older Lma gramtes. ca. 178Ok49 Ma (Rb-Sr. ‘Welm et al. 1971).

Age. ca. 1530-1770 Ma; the dykes intrude the Niemisel Highly scattered low coerctvtty (lc) data. gabbro (entry SO3-024). Ref: Ptper (1980a). The NRM is stmilar to that of the intruded gabbro. Ref Ptper (1980a); Bylund and Pesonen (1987). SO3-033 Jokkmokk basrc rocks (hc), S(C)

SO3-026 mean Nwmuel mtrwons. S(B) Age, ca. 1780&49 ma (see ~03-032) Hugh coercivtty (hc) data.

Age: ca 1530-1770 Ma (see SO3-024). Combined mean of Ref: Piper (1980a). SO3-024 and 025). Ref. Piper (1980a); see also Pesonen and Neuvonen (1981). SO3-034 Jokkmokk basrc rocks, S(C)

SO3-027 Sangrs gabbro 1. S(A) Age: ca. 178Of49 Ma (see entry SO3-032) or 1530 Ma (see entry SO3-035). Anomalous NRM dtrectton whtch could represent the Age 1840+390 Ma (Rb-Sr; Welm et al., 1970): adjacent youngest magnettzation event at 1530 Ma m the xea. synorogenic gramte has an age of 1772 Ma. Ref: Piper (1980a). The NRM is generally stable and hard, and the agreement of duecttons between snes is good. The dtorittc rocks are magnetically softer than the gabbroic rocks (see oppostte trend SO3-035 VuoNerrm gabbro, S(D) m entry Sol-003). Petrologtcal studies reveal the presence of secondary magnettte and haematite. The latter was formed Age: ca. 1530-1770 Ma. geologtcal esttmate (see SO3-030) when magnetite was oxldtzed to haematite (martittzatton). Mean dnectton obtained from three weakb/ magnettzed Ref: Elmmg (1982, 1985). spectmens from a single sate (27). Ref: Ptper (1980a). SO3-O-78 Sang’s gabbro 2. S(C) SO3-036 Vuollerlm gabhro. S(C) Age. ca. 1530-1770 Ma (Piper, 1980a. based on data m the hterature). Age: See SO3-035. Sttes 9. 10, 11, 13. Single component NRM. Site wtth a slightly different direction from that in SO3-035. Ref: Piper (1980a). Ref: Piper (1980a). SO.i-f)3’ Harod\ amphdwlire~, S(D) The NRM was probably acquued durmg upi~lt .:nd ct~oltn~ of the body. and the lower age Itnnt represents the magnett/.l ~\ge. LX 1530-1770 Ma (W&n et al.. 1971) tton age The dtrecttons of NRM reveal a large scatter possibly due Ref Poorter (1976). to local tectomc disturbances. Ref. Ptper (1980a) BOI-002 OJL' has&% S(B)

Age: 745-931 Ma (K-Ar: Priem et al., 1968). The ages are Kola block /9/ SO4. Arcbaeao-Svecofennian probably too low. as these basalts form mhers wtthm the SubJotnian Dala metasediments (sandstones), whose ages range SO4-001 Kola gabhro-norltes, U(B) between 1250 and 1650 Ma (see entry 801-005) Ref: Mulder (1971) Age: Esttmated age 1610-1870 Ma (McELhmny and Cow- Icy, 1977). BOI-W3 Upper Dala porphynes, S(B) These gabbros are located III a presumably Svecofemnan mlier m the Kola Craton. Data from the Khramov catalogue. Age: 1570-1635 (Rb-Sr; Pnem et al., 1968; Welin and The NRM directron and pole Imply a Svecofenruan age for Lundqvist, 1970). remanent magnetization. Rehable palaeomagnetic data from only two phenocryst- Ref: McElhmny et al. (1977). rtch porphyrittc sites from the Upper Dala Series. Ref: Mulder (1971). Inlier in NW Sweden /16/ SOS, Svecofennian BOI -004 Upper Dala uolcanrcs, S(C) SO5-001 Bdngsfiiilet Complex, S(D) Age: ca. 600-900 Ma (K-Ar: Prrem et al., 1968); thts age may be too low (see BOl-002). Age: 1520+140 Ma (Rb-Sr, Hahlbrauch, 1982) This is a combined result of Upper Dala porphyries, bJe There is a dtscrepancy between the given NRM drrection basalts and SubJotnian dolerites of the Dala Complex. The and the pole posttron in the original paper. The correct pole authors interpreted the result as a Caledonian overprint, an (recalculated) ts given here, assuming that the NRM direction mterpretatron that has subsequently been refuted by Pesonen gtven by Hahlbrauck (pers. commun.. 1984) IS correct. and Neuvonen (1981) and Bylund (1985). Ref: Hahlbrauck (1982: pers. commun.. 1984); Llhde and Ref: Priem et al (1968). Pesonen (1985).

BOI -005 Dala sandstones (N). S(C) Central-north Lapland block /2/ SO6, Lapponian- Svecokarelian Age: Not dated, but constrained by geological evtdence to between ca. 1250 and 1650 Ma. The unit is generally referred SO&001 Alliouorso gabbro. F(o) as “Jotman Dala sandstone”, but palaeomaguetic data indicate an age m the range 1500-1600 Ma (i.e., SubJotman). Age: Estrmated age ca 1900 Ma (MerilLnen, 1976). Two magnetic directions were observed, one with a gentle Only two samples studied during reconnaissance. northerly or southerly directron and one with moderately steep Ref: Papunen et al. (1977). directions. Both groups have reversals. The entry hsts the shallow northerly normal polanty data, presumably repre-

SO&002 Tshokkoarw gabbro, F(C) senting the time of depositron-lithification of the sandstone. Ref: Piper and Smith (1980): this work.

Age: ca. 1900 Ma (see SO6-001). BOI -006 Dala sandstones (R). S(C) The NRM direction is consistent with the directions of the neighbouring Granulite Belt (see entry EOl-004). Age: See BOl-005. Ref: Papunen et al. (1977). Reversed polarity data. Ref: Piper and Smith (1980). TSG3 Belt /lo/ BOl, Subjotnian

BOI-007 Da/a sandstones (IR). S(C) BOI-WI Loftahammar gabbro, S(B) Age: See BOl-005. Age: ca. 1465-1845 Ma (K-Ar, Rb-Sr. U-W; Aberg, Reversed polarity intermediate direcuons. 1978: Pnem and Bakker, 1973: Priem et al., 1969). Ref: Prper and Smith (1980); this work C4T4LOGllE OF PALAEOMAGNETIC DIRECTIONS AND POLES FROM FENNOSCANDIA 167

BOI -008 Dala sandstones (IN). S(C) BO2-006 Kumhnge - Briindii dvkrs. F(A)

Age: See BOl-005. Age: 1550-1601 Ma (U-Pb. Zr; Rb-Sr, Suo~nen. 1987. Normal polanty intermediate directions. Pesonen et al.. 198Sa; Pesonen and Suommen. m prep.) Ref: Ptper and Smith (1980): tms work. A further study of the R polanty dykes listed m BCE-004 Postttve baked contact test. Demagnettzatmn sndres mdrcate that a thud group of dykes wtth IntermedIate dtrecttons extstx BOI-OOV Dala SrcbJotnran has, S(A) m the area Fteld evidence suggests that dykes with reversed polanty (thts entry) are shghtly older than those wtth normal Age 745-931 Ma (K-Ar; Pnem et al., 1968). polanty (B02-007). and that the dykes are coeval wnh or Located withm the Dala sandstones. these lavas are prob- shghtly younger than the Aland rapaktvt gramtc: (entry BO2- ably snmlar to those studied by Mulder (1971) and Pnem et af. 018). Wtth one exceptton (Kungsholm dyke), these dykea have (1968) (see entnes BOl-002 and BOl-004). not been observed cuttmg the Aland rapaktvr gramte (entry The magnettc dtrectton. wtth dual polarity, IS believed to B02-018,. date the time of deute~c-hydrothermal alteration of the lavas Ref: Pesonen and Neuvonen (1981): Pesonen 3t al. (1985ar. to around 7 50% 1600 Ma ago. Pesonen and Suommen (in prep ) Ref. Ptper and Smtth (1980). BO,‘-007 F6giL Sortunga cfvker. F(A)

South Finland block /7/ BO2, Subjomian Age: 1523-1553 Ma (see B02-005) Postttve baked contact test 80-7-001 Aca drabase gykes. F(C) Ref: Pesonen and Neuvonen (1981): Pesonen et al. (1985a): Pesonen and Suo~nen (m prep.) Age. ca 1550 Ma (on geological grounds). Data from two diabase dykes wtth normal polarity. BO?-008 Eckerd &kes, F(D) Ref: Neuvonen (1970).

Age: Not dated. but probably of SubJotman age BE-O& mmn iva mtrwons, F(B) Data ongmally from Neuvonen and Grundstrom (1969) The samples were later demagnettzed by Pesonen (1983. unpubhshed data). The NRM dtrectton 1s unlike the other Suh- Age: ca. 1550 Ma (on geological grounds). Jotman or Jotman dtrectrons m the Aland arc hrpetago (e.g Data from fifteen sates representing Ava intrustons (granites, entries B02-006 and GOl-006) porphynes and diabase dykes). All with norma polarity. Ref: Neuvonen and Grundstrom (1969), Pesonen (1983. Ref. Neuvonen (1970). unpubhshed data)

BE-009 Kursaan dolente. F(A J

Age: 1600 * 30 Ma (U-Pb. Zr; Rb-Sr; Suommen, 1987) Age: 1670-1630 Ma (Vaaqokr, 1977). Two samples (from two dykes). The NRM reflects reheating caused by the nearby Ahvemsto Ref: Neuvonen (1970): Pesonen and Neuvonen (1981), rapaktvt massrf. The directton (R polartty) ts close, but of Pesonen et al. (198Sa). opposite polarity. to that of the Aland rapaktvt massif (N polarity; entry B02-018). Ref: Neuvonen (1978).

802-010 Makarh quartz-dolerrte, F(C) Age: 156551599 Ma (U-Pb. Zr: Rb-Sr; Suominen, 1987). Data from three R polanty dykes. Age: No age data. but esttmated to be 15(X-1600 Ma old Ref. Neuvonen and Grundstrijm (1969); see also Pesonen on palaeomagnettc and geological evtdence. Data constdered and Neuvonen (1981) prelunmary. Ref. Neuvonen ( 1965 ).

BO,‘-01 I Norru Betesiin c&ke. F(C) Age. 1523-1553 Ma (U-Pb, Zr: Rb-Sr; Suominen. 1987). Normal polanty data from e&t dykes. Age: No age data. but esnmated to be ca. 1600 Ma old. Ref: Neuvonen and G~ndstr~m (1969). Posmve baked contact test Palaeomagnetlc data used to cal~ulatr the depth of erosion to have occurred bmce the Intru\lon of this dyke. Kef Palmu (1982) Age: Not dated. Data considered prehminary, bur yield a SubJotman H BO2-012 Fi@l& Bergskiir dvke. F(D) polanty direction Ref Neuvonen (1965). Age: 1523-1553 Ma (U-Pb, Zr; Rb-Sr: Suominen, 1987). Only two samples studied. The NRM &e&ion is typical of B90-020 SE quartz-porphyp &kes, F(B) that found in other SubJotnian normal polanty dykes. Ref: Johnson (1979). Age: 1617-1638 Ma (U-Pb, Zr; Neuvonen. 1986) 802-013 FiiglO: uralite-porphyrrre. F(D) Normal polarity data from Subjotnian dykes in sootheast- em Finland. These dykes, with N polarity, are related to the Wiborg. Ahvenisto and Suomenniemt rapakivi bodies, which Age: Not dated, but 1s thought to be Subjotnian (Johnson, they cut with chilled margins. Dykes with R polarity also exist 1979) but they reveal a large scatter of NRM directions (Neuvonen, Only two samples studied. The NRM direction agrees with 1987, unpublished data). that of the other Subjotnian R polanty dykes (e.g., entry Ref: Neuvonen (1986). B02-006). Ref: Johnson (1979). South-central Sweden block /7/ BO3, Subjotnian 802-014 Kumhnge - Bergskiir dyke, F(D)

Bo3-001 Ragunda rapakivl gramte. S(B) Age. 1599 f 26 Ma (Rb-Sr; Suominen, 1987). Only two samples studied; the NRM direction agrees wrth Age: 1291 of:30 Ma (Rb-Sr; Komf%lt, 1976). that of the other Subjotman R polarity dykes. The Ragunda Formation comprises anorthosite and gabbro Ref: Johnson (1979). intrusions Intruded by granite and syenites. The formation IS also cut by two generations of dolerite dykes (see entries 802-015 Korsij &ke, F(D) B03-005 to 009). The data were recalculated by L&de and Pesonen (1985) Age: 1599+26 Ma (Rb-Sr; Suominen, 1987). and divtded into normal and reversed polarity groups. Two samples studied from a 150 m thick dyke with R Ref: PIper (1979a); L&de and Pesonen (1985): By4und and polanty (see also B02-003). Pesonen (1987). Ref: Johnson (1979).

B03-002 Ragunda Formatjon (R), S(B) 802.016 Vesr Sederholm dvke. F(D)

Age: Not dated, but thought to be SubJotnian (Suominen, Age: See B03-001. Mean of the R polarity sites. 1987). Ref: Piper (1979a); L&de and Pesonen (1985). Only two samples stud&. Ref: Johnson (1979). 803-003 Ragunda Formatron (N), S(A)

BO?-017 mean Briindii R dykes, F(C) Age: See B03-001. Mean of the normal polarity sites. Note that the division Age: ca. 1550 Ma (see B02-013 to 016). into N and R sites is not always straightforward because there The mean of four R polanty dykes are a few sites where the dire&on shifts from N to R polarity. Ref: Johnson (1979); this work. and vux versa (see Piper, 1979a). Ref: Piper (1979a); L&de and Pesonen (1985). B02-018 Blond rapakw granrre, F(C)

803-004 mean Ragunda Formatron, S(A) Age: 1589-1659 Ma (U-Pb,Zr; Suominen, 1987; Vaasjoki. 1977). SH samples from the Aland rapakivl massif. Age: See B03-001. Ref: Johnson (1979); Pesonen and Neuvonen (1981); L&de Combined mean of the N and R polarity directmns. and Pesonen (1985). Ref: Piper (1979a); L&de and Pesonen (1985). (‘ATALOGUE OF PALAEOMAGNETIC DlRECTlONS AND POLES FROM FENNOSCANDIA 164

B03-005 psi-Iiagunda dykes (R). S(B) 303.012 E-W dvkes II. S(C)

Age: Estimated age ca. 1250-1320 Ma. Age: Not dated. Estimated age ea. 1510-1560 Ma (Bylund. Reversed polanty data from the E-W and NW-SE trend- 1985). mg dykes that cut the Ragunda Formation. The poles define The anomalous NRM may include two or more compo- the end of the SubJotnian APW loop The reversal IS nearly nents not dtstingutshed by a f. and thermal treatments. Thts perfect (180”). could be the reason for the anomalous palaeom.rgnetrc drrec- Ref: Ptper (1979a); L%hde and Pesonen (1985); thus work ttons Ref: Bylund (1985).

BO3-006 post-Ragunda dr’kes (N)* S(C) BO3-013 Tunu &kes. S(B)

Age: See B03-005. Normal polanty data. Age. 1371 i 50 Ma (Rb-Sr, Patchett. 1978) The Tuna dykes comprtse dolentes and yuat tz-porphynes Ref Piper (1979a); Lahde and Pesonen (1985). this work. with a NNE strike. They cut the Svecofennian gramtes and leptttes tn the southern Dala Provmce. Only .N polanty dyke\. BO3-007 menn post-Ragunda dykes (C), S(B) Ref. Bylund (1985)

Age. See B03-005 and 006. Combmed mean of the N and R polarity data (entries B03-005 and 006). Age. 1518+ 38 Ma (Rb-Sr; Patchett. 1978). Ref: Paper (1979a): LZhde and Pesonen (1985); this work. This A component is constdered to represer t the ttme of mmal coohng of the dyke (see also BO3-015). BO3-008 Ragunda dvkes (R). S(C) Ref: Ptper (1980a).

Age: Not dated, but the estimated age is ca. 1290 Ma. B03-015 Hiilleforsniis cjvke (hh). S(D) Mean of the R polarity dykes. Ref. Ptper (1979a); Llhde and Pesonen (1985); thts work. Age: This overpnnt has not been dated. The entry, based on data from one sate only. hsts the htgh BO3-009 Rugunda dvkes (N), S(C) blocking temperature (hb) duectron. whtch probably records the Svecononvegian remagnetizatton undergone by this dyke about 900 -1000 Ma ago (see also entrees B03-011, POl-014 Age: See B03-008. and PO3-047). Mean of the N polanty dykes. Ref: Piper (1980a). Ref: Piper (1979a): Lfhde and Pesonen (1985): this work.

BO3-016 Nordqrd basrc @kes (3). S(B) B03-010 mean Ragunda gvkes (Cl, S(Cj

Age: Estrmated age ca. 1500-1600 Ma (1.e. Subjotnian) Age: See B03-008. (Fndh. 1979). Combmed mean of the N and R polanty data (entnes The Nordmgra drabase dyke swarm (3) strikes E-W wrth 803~008 and 009). vertical dips. The dykes are very fme grained. The characterts- Ref: Piper (1979a): Lade and Pesonen (1985); this work. tic NRM dtrectton IS anomalous. posstbly bemg older than 1600 Ma, perhaps late Svecofenman (ca. 1750 Ma old) B03-01 I E-W &kes I, S(B) Ref: Fndh (1979): LIhde and Pesonen (1985).

Age: 1510-1560 Ma (Rb-Sr: Patchett, 1978). 803-017 Nordmgri gabbro - anorthosrte (R), S(A ) Thus entry comprises data from the large E-W trending Breven and Htileforsnls dykes and from the smaller Eskrlstuna Age: 1385.1550 (Rb-St and U-Pb (Zr): Komfalt. 1976; dyke swarm. Both isotoprc and palaeomagnetrc studies imply Welin and Lundqvist, 1984). that these dykes were to some extent affected by the Sveconor- Both polanties occur m this formatron: the H polanty sites wegian orogeny (see entries 803-015 and POl-014). However, tend to be closer to the centre of the formatton than the N the charactenstic stable component listed here records a polanty sites, suggestmg that the R pole is shghtly younger prtmary mtruston age. than the N pole. Ref: Bylund (1985): Patchett (1978). Ref: Piper (1980b): Lahde and Pesonen (1985). southern Baltic Sea. Unlike the other Bornholrn dykes. tlus dyke 1s of reversed polarity and Intrudes a mylonttlr.etl Lone Age. See B03-017 Ref. Schhnemann (1972). .Y polanty data. may be shghtly older than the R polanty data ROI-002 Vase6 hake. D(B) Ref: Plper (1980b): Llhde and Pesonen (1985).

Age: ca. 1200 Ma (estunated age: Abrahamsen. 1977). 80.1-019 mean Nordtngrc? gabbro - anorthostte /C). S(A) The dyke 1s strongly altered and the magnetization may represent a remagnetization event around 12CK-1000 Ma ago. Age: See B03-017. Ref: Abrahamsen (1977). Combined mean of the N and R polarity data (entries B03-017 and 018). ROI-003 Vtgehaon dyke. D(C) Ref: Piper (1980b); L&de and Pesonen (1985).

803-020 Nordmgr4 granrte (R), S(B) Age: Not dated, but estimated age ca. 1200 Ma (Abraham- sen. 1977). The NRM shows a clear trend from the magnetic field Age: Not dated, but an age of ca. 1385-1550 Ma is direction of the Earth’s present field direction towards that of estimated on geological grounds. Thus granite IS considered the Jotman type ( = CSDG). Thus, an age of 1200 Ma is slightly younger than the NordingrA gabbro-anorthosite (entry plausible, but a Palaeozolc overprmt is also possible. B03-017). Ref: Abrahamsen (1977). Both polanties are present and ths entry lists the R polarity data. Ref: Piper (1980b); L&de and Pesonen (1985). ROI -004 BGlshavn dyke, D(B)

B03-021 Nordin@ grantie (N), S(B) Age: Not dated; estimated age ca. 1200 Ma (i.e. Jotnian). The dyke is characterized by the A component; the direc- Age: See B03-020. tlon is either Jotman (ca. 1200 Ma) or Palaeozoic. N polarity data. Ref: Abrahamsen (1977). Ref: Piper (1980b); L&de and Pesonen (1985)

ROI-005 Biilshavn dyke (B), D(C) 803-022 mean NordingrB granite (C), S(A)

Age: Not dated, the estimated age for this (B) overprint IS Age: See B03-020 800-1000 Ma (I.e., Sveconorwegian). Combmed mean of the N and R polarity entries (B03-020 The high-coercivity component is probably due to a and 021). Sveconorwegian overprint. Ref: Plper (1980b): L&de and Pesonen (1985). Ref: Abrahamsen (1977).

803-023 Giiule grantre, S(B) ROI -006 Listed dyke, D(B)

Age: Not dated, but a Subjotnian age (ca. 1385-1550 Ma) IS assumed on palaeomagnetic grounds. This rapakivi granite is Age: Not dated, but cut by the Early Cambrian Nex6 cut by post-Jotnian GBvle and Nor&m@ dolerites (entry GOl- sandstone dykes. The dyke intrudes a mylonitized fracture. The 005). mylonization (and dyke?) may be of Sveconorwegian (i.e., ea. Only N polarity sites. 800-1000 Ma) age. The characteristic NRM component is Ref: Piper (1980b). shown here; see also entry ROl-007 for a presumably Palaeo- zoic overprint. Ref: Abrahamsen (1977). Bomldm black /If/ ROl, Jotnian-Sveconortwgh

ROI -001 Klel&ed dyke, D(B) ROI -007 Listed overprint, D(D)

Age: ca. 1000-1400 Ma (K-Ar; Larsen, 1977; quoted in Age: Estimated age: Palaeazoic. Abrahamsen, 1977). See entry RO1-006 for the characteristic component in this Data from vertical N-S to NE-SW trending dolerite dykes dyke. on the northeast coast of the island of Bomholm in the Ref: Abrahamsen (1977). CATALOGL’E OF PALAEOMAGNETIC DIRECTIONS AND POLES FROhl FENNOSCANDIA 171

Central Scandinavian dolerite (CSDG) Complexes, Jotnian The dolente sheets/dykes stnke roughly NNE-SSW cuttmg the nngmatittc basement rocks m the Vaasa archtpelago

These entnes compnse data from dtabase (dolente) SIBS The dolerites are undeformed and dykes. from flat-lymg dolente sheets and lopoliths. and Ref: Neuvonen (1966). also from Jotnian sandstones intruded by the dolerite bodtes. These complexes. collecttvely known as the Central Scandina- GOI -005 Giicle dolerrre. S(B) drvran Dolerite Group (CSDG). correspond m age to the MacKenzre and late Gardar tgneous actlvittes in North Amenca Age: Estrmated age ts 1200-1300 Ma The dolsnte cuts the and Greenland respecttvely The CSDG ts dtvrded into four SubJotman Gavle rapakrvr gramte (entry 803-033 complexes: the Satakunta (S). Ulvo (U). Dala (D) and Jamt- Possibly a sm. land (J) complexes. The Dala Complex includes groups of Ref. Poorter (1976). dolerites (the Dala Anomalous Dykes m the catalogue) of contemporary or older age that dtsplay NRM directions dtffer- GO1 -006 Miirket dolentes. F(A) mg from those of the four CSDG groups. Note that m entnes BOl-005 to 008 the Dala sandstone data are treated as Sub- Jotnian rather than Jotman. Age: 1265 ~6 Ma (U-Ph. Zr: Suommen. 198;‘). These well-preserved ohvme dolerites cut the Aland rapaktvr massif m the Eckerd area (entry B02-018) CSDG-Satakunta Complex /12/ GOl, Jotnian Both sills and dykes are present, the dolente on Market Island being a SIB. GOI -001 Sarakunra sandstone. F(B) Ref: Neuvonen and Grundstriim (1969)

Age, 1300-1370 Ma (K-Ar: Kouvo, 1976: Stmonen. 1980), CSDG-UIvG Complex /13/ CO2, Jotnian and geologtcal evtdence. Thts almost flat-lying Jotman sandstone m southwestern GO?-001 Nordmgrd sandstone. S(D) Finland has reststed erosion because It was depostted m a NW-SE trendmg graben. The sandstone IS cut by the Sata- Age. Esttmated age ca. 1300 Ma (from geologtcal evrdence). kunta dolentes, ~111sand sheets (see entries GOl-002 and 003). Magnusson (1983) hsts data from ftve sttes. hut he point\ Ref. Neuvonen (1974) out that three of them were probably remagnettzed by the mtrudmg UlvG-Nordmgra dolente (entry GOZ-007 to 009). GOI -00-7 Satakunfa srlls F(D) Two sites reveal different duecoons, however. and are here assumed to represent the charactenstlc magnetmatron of the Age: 1263 Ma (U-Pb, Zr; Suominen, 1987; Hamlllinen, sandstone. Data uncorrected for structural dip. 1987). Ref: Magnusson (1983); thts work. Thts entry 1s part of a much larger collection (entry GOl- 003). but is listed separately so that any dtfference m rema- GO_‘-001 Viister - Norrland dolerues. S(A) nence dtrection between ~111sand dykes can be studied. Com- parison with GOl-003 reveals no evidence for such a difference. Age: 1213-1270 Ma (K-Ar: Welin and Luntlqvtst. 1975). Ref. Neuvonen (1965). see also Pesonen (1987). Data mamly from prevtous studies but some new data also mcluded. These dolentes intrude the Svecofennlan basement, GO1-003 Satakunta dolerm &km. F(A) the Nordingrl sandstone (GO2-001). and also the Nordmgra granite (B03-020) and the Nordmgra gahbro-anorthosite (BO3- Age: ca 1240 Ma (U-Pb. Zr; Suominen. 1987; Hlmllamen. 019), yrelding a posttive baked contact test (see entnes GO2-006 1987). and GO2-010). The dolerites appear as sheets. lopohths, ~111s These dykes cut the basement migmatites. the Satakunta and dykes with rhythmrc igneous layering. Composrtton IS sandstone (GOI-001) and the Lattila rapaktvl massrf. The dykes alkah ohvine basaltic. NRM often shows excurstons to shallow trend nearly N-S. and are etther vertical or dip steeply to west inchnations and show chilled margins. Positive baked contact test (Pesonen. Ref: Ptper (1979h). 1985. unpublished data). Ref: Neuvonen (1965); Bylund and Pesonen (1987). GOZ-GQ3 Gnarp srlls, S(B)

GOI -004 Vuasa dolerrtes. F(A) Age: 1213-1270 Ma (estimated by Piper, 1979h). Possibly the southern part of the Nordingrl dolerite sell Age: 1225-1270 Ma (Rb-Sr; U-Pb (Zr); Suominen, 1987; (entry GO2-007). Neuvonen. 1966; Aro. 1987). Ref: Ptper (1979h) tiO-7.004 Gnarp d&me dykr, S(B) CSDG-Dala Complex /14/ G03, Jotnian

Age: 1245k20 Ma (Poorter. 1976; Wehn and Lundqvtst. G03-001 Siirnii dolerrtes, S(A) 1975) Located in the southern part of the Ulvo Complex (see Age: 1215-1290 (Rb-Sr; Patchett, 1978). Go2-003). These dolentes cut the SubJotnian Dala sedtments tentry Ref: Poorter (1976). BOl-005 to 008). The dykes trend SE-NW and are composed of olivine- GO?-005 NordingrZ basic &kes (2). S(C) dolerite. Both dykes and sills are present. Ref: Piper and Smith (1980b). Age: Not dated. A Jotman age 1s inferred from palaeomagnetic data. GO3-002 Dala dolerttes. S(D) Ref: Fridh (1979). Age: Not dated. The estimated age is 1200 Ma (Dyrelius, G02-006 Nordmgr6 Jotman ouerpnnrs, S(A) 1970). A prelimmary study (see entry GO3-001) Age: ca. 1250 Ma, on geological and palaeomagnetic basis. Ref: Dyrelius (1970). The NRM is an overprint isolated in the Nordin@ rapakivi granites and gabbro-anorthosites and is attributed to baking G03-GO3 Lybergsgnupen dolerrte, S(C) by the NordinrP and Vastemorrland dolerites (entries GO2-002

and GO2-007). Age: Not dated. The characteristtc NRM direction suggests Ref: Piper (1980b). a Jotnian age for this dolerite. Ref: Mulder (1971). W2-007 Nordmgri dolerrtes, S(B)

G03-004 .&&ls&en dolertte stfl, S(B) Age: 1245 + 20 Ma (K-Ar; Welin and Lundqvist, 1975). Tms olivine-dolerite sheet, which intrudes the NordingrP Age: 1231* 18 Ma (Rb-Sr; Patchett, 1978). sandstone (entry GO2-OOl), is tectonically undeformed and Ref: Bylund (1985). shows igneous layering. On the basis of pafaeomagnetic data it appears to be slightly younger than the Gnarp dolerite (entries W3-005 Mossi dolerite srll, S(D) 02-003 and 004) and the Gavle dolerite (GOl-005). Ref: Poorter (1976). Age: 1217* 18 Ma (Rb-Sr: Patchett, 1978). The characteristic NRM directions show large scatter. W2-008 U&i dolerrte dykes. S(B) Ref: Bylund (1985).

Age: 1215 *20 Ma (Larson and Magnumon, 1976). CSDC--J&&and CompIex /15/ Car, Jot&n Data from dolerite dykes and sheets. Ref: Larson and Magnusson (1976). GO4-001 Sun&j6 dolerite, S(C)

W2-009 LNv6 dolerites, S(B) Age: 1156-1213 Ma (Rb-Sr; Patchett,l978). Acid rheomorphic dyke in the dole&e gives the same NRM Age: 1215 f 20 Ma (Welin and Lundqvist, 1975). direction as the dolerite. Data from dolerite dykes and lopofith with igneous layer- Ref: Bylund (1985). ing. Authors estimate that cooling of the lopolith lasted for about 10,000 years; the secular variation has thus probably been averaged out. W4-002 Grm& dolerite, S(B) Ref: Magnusson and Larson (1977); see also GV2-008. Age: 1179-1229 Ma (Rb-Sr; Patcbett,l978). W2-010 Nordingrd baked anorthosite, S(B) Ref: Bylund (1985).

Age: Estimated age ca. 1245 Ma (Magnusson, 1983). CSDC-Dala Amnm&sa Dykes /14/ C@S, Jots&n&& Sites in the Nording& gabbro-anorthosite which, accord- lotnipn mg to Magnuason (1983), were remagnetixed by post-Jot&n dolerites (GO2-007) (compare with entry BO3-017). This group consists of data from six dykes in the Dafa Ref: Magnusson (1983); this work. Province which yield deviating palaeomagnetic directions with (‘ATALOGUF. OF PALAEOMAGNETIC DIRECTIONS Ai%D POLES FROM FENNOSCANDIA 173

respect to the other CSDG data. The cause of these devtattons East of Protogine Zone /lo/ POl, Sveconorwegian 1s not clear, but three explanauons have been offered by Bylund and Pesonen (1987): (I) the anomalous directmns re- This group comprises data from dolerite dykes that trend flect Caledoman overprints, (ii) the overprints are due to the parallel to. but are situated east of, the Protogine Zone (PZ). SilJan Impact event or (in) the dykes are not Jotnian, but which marks a tectonic boundary between the Sveconorwegtan SubJotnran, m age (ca. 1550 Ma old). I.e., there are several and Svecofenman Provtnces (Fig. 1). They yield Rb-Sr ages generattons of dolente m the area. between ca. 875 and 995 Ma (Patchett. 1978). Both normal and reversed polanties are present and all data are from Sweden GO5-001 EmBdalen dolerrte srlls. S(C) (see also entry EOl-005, the Laamla dykes m Finland).

Age: 1223 + 36 Ma (Rb-Sr; Patchett, 1978). POI-001 Korlshamn dolerite. S(B) Tbrs dolerite sill 1s partly monzonitic. No difference is observed m magnetic directions between the monzonitic and dolenttc parts of the sill. Age: 871-936 Ma (Rb-Sr; Patchett, 1978). Ref: Bylund (1985). Palaeomagnetically this dolente IS slightly anomalous with respect to other dykes m the group. It may be shghtly older,

GOS-002 iluho dolente alls, S(C) i e., of early Sveconorwegan age (ca. 1000 Ma). Ref: Patchett and Bylund (1977).

Age: 1215 f 18 Ma, 1290+63 Ma (Rb-Sr; Patchett, 1978). NRM directions obtained from rheomorphic acrd dyke POI-002 Karlshamn h_vpente-dolente, S(B) wtthm the dolente agree with those of the dolente. Ref: Bylund (1985). Age: See POl-001. An earlier study on the Karlshamn dolerite. GOS-003 Bunkrls dolerrte. S(C) Ref: Poorter (1975).

Age: 1X6&62 Ma, 1546+84 Ma (Rb-Sr; Patchett, 1978). Patchett (1978) places l&e confidence in the age data. How- ever, the palaeomagnettc direction favours a Subjotman rather than a Jotman age for thts dyke. Age: Not dated. The palaeopole plots on the late Ref: Bylund (1985); see also Bylund and Pesonen (1987). Sveconorwegian part of the APW loop m contrast to the pole of the neighbounng Karlshamn doierite (POI-OO-).

GO5-004 Bunkrrs dolerrte, S(C) Ref: Patchett and Bylund (1977).

Age: See Go5-003. This IS an earlier study on the same dolerite as Go5-003. Ref: Mulder (1971). Age: 995 k 65 Ma (Rb-Sr; Patchett. 1978). Ref: Patchett and Bylund (1977). GO5-005 G!v.rjij, doiertfe, S(C)

POI-005 Falun dolenre. S(B) Age: Not dated, but according to geological maps (HJelmqvist, 1966), this dyke is a continuation of the Bunkris dyke (GOS-003). Age: 966 rt 20 Ma (Patchett, 1978). Ref: Bylund (1985). Ref: Patchett and Bylund (1977).

GOS-006 Clysiiin dolerrte, S(C) POI -006 T&&i dolerrte, S(C)

Age: See GO5-005. Age: 871 f 21 Ma (Rb-Sr; Patchett, 1978). The Rb-Sr ages An earlier study on the Glysjijn dolerite. See GO5-005. on the unbaked country rock near this dyke are about 1650 Ma Ref: Mulder (1971). (Patchett. 1978), suggestmg that they (and the palaeomagnettc data) refer to intrusion ages and not Sveconorwegtan cooling GOS-007 k;ndn dolerrte, S(C) and uplift ages. Sandstone inclusions in the dolente record the same direc- Age: Not dated. tions as the dolente. Ref: Mulder (1971). Ref: Patchett and Bylund (1977). PO/ -007 Briikne - Hobv dolerrre. S(C) Within Protogine Zone /17/ PO2, Sveconomegian

Age: 880-975 Ma (Rb-Sr: Patchett. 1978) Thus group comprises syemtes and doleme!. (“hyperite\’ ) Ref: Patchett and Bylund (1977). m southernmost Sweden. They intrude the PZ. and \trrke parallel to it. The syemtes yield Rb-Sr and Sm-Nd ages of ca. 1200 Ma. The dolerltes are apparently of two generations. One PO1-008 Fbj6 dolorrte, S(C) IS contemporaneous with the syemtes and IS ca. 950 Ma old (Klmgspor. 1976; Patchett. 1978: Johansson. L , 19Xx; Johan+ Age: 924+ 26 Ma (Sm-Nd: Johansson and Johansson. 0 son. A. 1988: Johansson and Johansson. 1988). The K-Ar ages 1988). of the doleriles range from 560 Ma lo the peak at ca. 980 Ma This dyke is also known as the Liisen dyke. The palaeomagnetlc data in&ate that the syemtea and the Ref: Patchett and Bylund (1977). older dolerites were remagnetlzed at the time of mtruslon of the younger dykes (Bylund, 1981). PO1 -009 Ntlstorp dolertte all. S(C) PO2-001 Scanra hyperrte - dolentes, S(A) Age: 984f47 Ma (Rb-Sr; Patchett, 1978) Ref: Patchett and Bylund (1977) Age: 563-1595 Ma (K-Ar): 1565+230 Ma (Rb-Sr; Klingspor, 1976). Dykes vary in width from a few centimetrea up to 300 POI -010 Vtibv - Ronneby hypente - dolente, S(C) metres. They are nearly vertical and strike approximately NNE parallel to the PZ. Age: Not dated. Ref: Bylund (1981). The same dolerite as POl-003. Although mainly of reversed polarity, one sample shows a normal polarity direction. PO2-002 Scama syemtes. S(B) Ref: Poorter (1975).

Age: 1184 f 38 (Rb-Sr; Klingspor, 1976). PO1-01 I EJOI dolerrte, S(C) The NRM of the syenites is very similar to that of the hyperite-dolerites (entry PO2-001) and probably records the Age: Not dated. Sveconorwegian remagnetization. Ref: Bylund (1985). Ref: Bylund (1981).

PO1-012 M&siitter dolerrte, s(c) POZ-003 mean Scanra mtrwoes, S(A)

Age: Not dated. Age: See PO2-001 and 002. Ref: Bylund (1985). Combined mean of the hyperite-dolerites and syenites. Ref: Bylund (1981); L&hde and Pesonen (1985).

PO1-013 Norn& dolerite, S(C) POZ-004 HiigBhult h.vpente - dolertte. S(B)

Age: 901-933 Ma (Rb-Sr; Patchett, 1978). Age: 835 Ma (K-Ar; Poem et al., 1968). The same dyke as POl-015. A detailed profile across this hyperite was made by Mulder Ref: Bylund (1985). (1971) to study the palaeosecular variation during the cooling of this dyke. The dyke is probably one of the ca. 950 Ma old POI-014 Bo dyke, S(C) dykes (Johansson, pers. commun.. 1989). Ref: Mulder (1971). Age: Not dated. Probably Sveconorwegian (see also B03- 015). PO2-005 Osby hyperrte- dolerrte. S(C) Ref: PIper (1980a). Age: 871 Ma (K-Ar; Priem et al., 1968). PO]-015 sate 43 dolertte, S(C) Ref: Mulder (1971).

Age: 901-933 Ma (Patchett, 1978). POZ-006 HjortsJG hypente - dolerite, S(C) This site is probably the same as in entry POl-013 (NomLs dyke). Age: 1573 f 50 Ma (K-Ar; Priem et al., 1968). Ref: Piper and Smith (1980a). Ref: Mulder (1971). C‘4TALOGUF. OF PALAEOMAGNETIC DIRECTIONS AND POLES FROM FENNOSCANDIA 175

PO?-007 MBIaskog hypertte - dolertte, S(C) PO3-004 Rogaland farsundrte north. N(A) Age, 886 f45 Ma (K-Ar: Pnem et al.. 1968).

Ref: Mulder (1971). Age: 944977 Ma (U-Pb. Zr). 86Ok30 Ma (Rb-Sr) Versteeve (1975). PO?-OOK Krrstmehamn hyperrte - dolerrte, S(C) The NRM dnectrons show an elongated 1:-W pattern whtch may represent APW durmg slow uphft and coohng. Age. 1516f 50 Ma (K-Ar; Pnem et al.. 1968). Although Ref: Steam and Ptper (1984). thus dyke has a great (I.e.. Subjotman) K-Ar age. the palaeomagnetrc dtrectron is very similar to that of Malaskog PO3-005 Rogaland jarsundrte south. N(A) dyke (entry PO2-007). indicating Sveconorwegian resetting at around 900 Ma. Ref. Mulder (1971). Age: 944977 Ma (U-Pb, Zr. Versteeve. 1975). Magnetic dnecttons in the south are steeper (upwards) and

PO?-009 mean N h.vperrte - dolerrtes. S(B) more scattered than m the north (entry PO3-004) Ref: Stearn and Prper (1984).

Age: 835-1573 Ma; see PO2-004 to 006. Mean of N polarity hypente-dolerites. PO3-006 mean Rogaland jarsundlte. N(A) Ref. Mulder (1971); Lahde and Pesonen (1985); Bylund and Pesonen (1987). Age: See PO3-004 to 005. Mean of data from farsundites (entnes PO3-004 and 005). PO_‘-010 mean R h_vpente - dolentes, S(B) Ref: Steam and Ptper (1984).

Age: 886-900 Ma (see PO2-007 and 008). PO3-007 Farsund mlgmatrtes, N(C) Mean of R polarity hyperite-dolerites, Ref: Mulder (1971); Lahde and Pesonen (1985); Bylund and Pesonen (1987). Age: 927 + 26 Ma. 983 * 88 Ma (Rb-Sr; Versteeve. 1975). Ages and the palaeomagnetic data are attnbuted to cooling West of hotogine Zone /18/ PO3, Sveconorwegian durmg the post-tectomc uplift of the terrane Ref: Steam and Piper (1984)

These data comprise entnes from a variety of areas and rock types from the Sveconorwegian Province proper. They PO3-008 Hldra ho&, N(B) range m age from ca. 850 Ma to ca. 1050 Ma. The NRM in many of these rocks probably records the uphft and cooling of Age: A Svecononvegian age is assumed on geologrcal evt- the provmce dunng and after the peak of the Sveconorwegran dence. orogeny. Both polanties are present. Ref: Stearn and Piper (1984).

PO3-001 Rogaland anorthosltes, N(B) PO3-009 Garsaknat bodv, N(A)

Age: 842-945 Ma (K-Ar: Rb-Sr; Steam and Piper, 1984). Samples from an area not affected by the Pgersund dykes Age: 902 f 30 Ma (Rb-Sr; Versteeve. 1975). (entry PO3-026) Ref Steam and Piper (1984). Ref: Poorter (1972a).

PO3-010 Garsaknat mlgmatues. N(C) POS-00,’ Rogaland mlgmatrtes, N(C)

Age: Not dated. Age: 927 f 26 Ma, 983 f 88 Ma (Rb-Sr). The Rb-Sr mmeral Only two sites were sampled. but the NRM directron IS ages range from 850 to 900 Ma and are interpreted as repre- typtcal of Sveconorwegian R polarity. sentmg cooling due to post-tectonic uplift of the terrain, Ref. Stearn (1979). Versteeve (1975). Ref: Poorter (1972a). PO3-011 Aana - Swa massrf, N(B) PO3-003 mean Rogaland basement rocks, N(C) Age: Not dated. but geologcal evidence indicates the same Age: 842-945 Ma (Rb-Sr; Versteeve, 1975). age as entry PO3-004 (Rogaland farsundite). Ref: Poorter (1972a); see also L%hde and Pesonen (1985). Ref: Stearn and Piper (1984). I’70

PO.Wl-7 Hauland Helleren massrf. N(B) PO.?-0,711Nensrr - Gumi>y h_vperrte hods. N(B)

Age Not dated (see PO3-004) Age: Not dated. Ref: Steam and Piper (1984) Ref. Stearn (1979).

POT-021 Brattiin Igneous rocks. S(B) PO3-013 Haaland - Helleren anomalous sttes, N(C)

Age: Not dated, but surroundmg mica-schists yield K-Ar Age: Not dated. ages of 1005 Ma and 1030 Ma (Magnusson, 1960: Broth. Data from three sites with more gentle inclinations than m 1964). the majonty of rites.. Ref: Steam and Piper (1984). Ref: Steam (1979); Steam and Piper (1984); L&de and Pesonen (1985). PO3-022 Brattiin dyke, S(C)

POS-014 Blerkrem - Sogna’al lopohth (I), N(A) Age: See PO3-021. This dyke extends to the Bratton intrusion (entry PO3-021) Age: 842 + 30 Ma (Rb-Sr). 945 f 40 (U-Pb, Zr). Versteeve and is considered younger than it. The dyke strikes ca. N70E (1975). and represents the latest stages of tectono-magmatic processes This lopolith intruded in four phases with slightly different in the Bratton-&gon area. lithologies (mainly anorthosites and norites; see also entries Ref: Steam and Piper (1984). PO3-015 to 017). Ref: Steam and Piper (1984). PO3 - 023 k’lgtin igneous rocks, S(A)

~03-015 Bjerkrem - Sogndai lopobth (2,s). N(A) Age: ca. 1005-1030 Ma (see- PO3-021). Ref: Steam (1979).

Age: 842-945 Ma (see PO3-014). PO3-024 mean Braffiifi and &g6n rocks, S(A) Data from monzonitic part of the lopolith. Ref: Steam and Piper (1984). Age: 1005-1030 Ma (see m3-021). The site mean poles form a small APW segment, with the PO3-016 Bjerkrem - SognaW lopolith (4). N(A) Bratton poles in the northern part and the &g,ih poles in the southern part. The dyke pole (PO3-022) is considered a virtual Age: 842-945 Ma (see PO3-014). geomagnetic pole (VGP) and younger than the other Bratton- Data from the quartz-monzonitic part of the lopolith. Algon poles. Ref: Steam and Piper (1984). Ref: Steam and Piper (1984).

PO3-025 Tuve dolerite, S(B) PO3 - OI 7 Bjerkrem - Sogndal lopolith, N(A)

Age: Geological and palaeomagnetic data indicate a Age: 842 &-30 Ma, 945 f40 Ma (Rb-Sr; Versteeve, 1975). Sveconorwegian age. An earlier study on this lopolith; see PO3-014 to 016. The dyke strikes WNW and is from a few centimetres to Ref: Poorter (1972a). 200 m thick. The dyke is strongly altered but the alteration may be late deuteric. PO3-018 anorthosrte complex, N(A) Ref: Abrahamsen (1974)

PO3-026 Egersund dykes, N(B) Age: 842-945 Ma (see PO3-014). Ref: Steam and Piper (1984). Age: 842-945 Ma reported by Storetvedt and Gidskehaug (1968). Sundvoll (1987) has recently reported a Rb-Sr age of PO3-019 anorthoslte anomalous sites, N(B) 630 Ma for these dykes, but it is still uncertain whether Sundvoll’s data are from the same dykes as those studied Age: 842-945 Ma (see PO3-016). palaeomagnetically. The palaeomngnetic data suggest that the Data with slightly gentler inclinations than in entry PO3-018. Egersund dykes are of Sveconorwegian age (i.e., ca 858 Ma Ref: Steam and Piper (1984); Ltihde and Pesonen (1985). old). See discussion in Pesonen et al., 1989). (‘A I ALOGUE OF P4LAEOMAGNETIC DIRECTIONS AND POLES FROM FENNOSCANDIA 177

The dykes intrude the Egersund anorthostte, stnke ESE interpreted as representing the thermal maximum of the orog- and are vertrcal. Their widths range from 1 to 30 m. They are eny, ea. 150-200 Ma before the final stages of cooling and unaltered o&me-bearing dolerites wtth chilled margins against uplift. Data are divided mto N and R polatitres. Thts entry all the other rocks they cut. lists the combmed data from Al sites with N polanty (Steam Ref. Poorter (1972a) and Piper. 1984) and sites TPB. TPC/TPD and TPE of Poorter (1975). Ref: Poorter (1975); Steam and Piper (1984).

Age: See PO3-026. PO3-033 Bamble rntrustonr (A1.R). N(D) Thts ts an earlier study on Egersund dykes (see F’O3-026). Ref. Storetvedt (1966a,b). Storetvedt and Gtdskehaug Age: See PO3-032 (1968) R polarity data from Al sites mcludmg stte TPL of Poorter (1975).

POJ-02X Egrrsund u~orfhostte, N(3) Ref: Poorter (1975); Steam and Piper (1984).

Age. Not dated, but esttmated age ca. 842-945 Ma. PO3-034 Bamble tntrustons (A2.N), N(A) These data were correlated with those from the Allard Lake anorthosite m the Grenville Province of North Amenca using Age: See PO3-032. the Bullard et al. (1965) reconstructton. The polanty of the Combmed data from A,7 srtes of :V polanty (Steam and anorthostte ts normal, in contrast to the reversed polanty of Piper. 1984) and site TPK of Poorter (1975). the Egersund dykes (see PO3-026). Ref: Poorter (1975); Stearn and Ptper (1984). Ref: Hargraves and Ftsh (1972). PO3-035 Bumble rnfrustons {ALR), N(C‘) PO3- O-79 Egersund unonhostte, N(C) Age: See PO3-032 Age: See ~03-028. Combined data from A2 sttes of R polarity. Data taken from an abstract givmg only the pole positton. Ref: Steam and Piper (1984). The correspondmg NRM direction listed m the catalogue was recalculated by L%rde and Pesonen (1985). PO3-036 Bamble tntrustons (A3.N). N(BJ Ref. Murthy and Deutsch (1974): Uhde and Pesonen (1985). Age. See PO3-032. Combined data from A3 normal polanty sites of Stearn PO_?-020 Eprstmd farsundtte. N(A) and Piper (1984) and site TPA of Poorter (1975). Ref: Poorter (1975): Stearn and Piper (1984). Age. 977* 36, 944+84 Ma (U-Pb. Zr: Versteeve, 1975). Ref Murthy and Deutsch (1975). PO3-037 Bamble tntrwons (A3.R). N(D)

Pfl3-031 rnt~rnfftt~~s combtned, N(B) Age: See PO3-032. Only one site m this R polarity entry.

Age See PO3-007. Ref: Steam and Piper (1984). Combmed data from three sites m m&mantes bordenng the Farsundtte (PO3-004) and Garsaknat (~3-~) bodies m PO3-038 Bumble tni~ton (BI, R). N(A) the Rogaland tgneous complex. Ref. Stearn and Piper (1984). Age: 97551120 Ma; see PO3-032. Data from R sites of Stearn and Prper (1984) wtth slightly dtfferent R polarity directions from those m A s&es. Ref. Stearn and Rper (1984).

Age: 975-1120 Ma (K-Ar; O’Ntons. 1969). The Bamble area is situated m southern Norway. The rocks PO3-039 Bamble - Kongberg ampbtbohtes, N(A) studted are mamly basic Igneous rocks. amphrbolites and hypentes that Intrude a high-grade metamorphtc basement. K-Ar Age: 975-1120 Ma (K-Art O’Ntons. 1969) dates are in the range 950-1080 Ma. The older ages are Combmed directtons from amphibohtes and hypentes. One inferred to represent temperatures of 650-700°C. A Rb-Sr site (TPL) has both polarittes and hence mixed polarity entry. whole rock isochron gtves an age of 1139+100 Ma and ts Ref: Poorter (1975). Age: Not dated. but U-Pb (Zr) data on a nearby hypente Age: The dyke IS dated to 1518+38 Ma (entry BO3-014) gtvea an upper age of 1550 Ma. The lower Intercept at 880 Ma but has been affected by later events. Thts Isolated htgh-coer- mdrcates a metamorphic event at 800-1000 Ma (Wehn et al.. cavity component IS probably of Sveconorwegtan age (ca. 900 1980). Ma) accordmg to APW interpretattun. See also entrv POI-014. Thts entry ts the mean of two N polarity sites Ref: Ptper (I 980b) Ref: Stearn and Piper (1984) Late Precambrian/Cambrian QO2 PO3-041 west Sweden mmor dvkes (R). S(B) QO2-001 Notway sparagmrtes. N(D)

Age: See PO3-040. Mean of five R polarity sttes including some data from Age: Strattgraphtcally, of Late Precambnan age. Mulder’s (1971) earlier study (site MZS). A prehminary study without demagnetization treatments. Ref: Mulder (1971); Steam and Piper (1984); Lahde and Both polarities are, however, present Pesonen (1985). Ref: Harland and Brdgood (1959).

QOZ-002 Next’ sandstone, D(B) PO3-042 west Sweden Palaeozorc overprint, S(C)

Age: From strattgraphic evidence, a Late Precambrian- Age: Palaeozoic overprint. Low-coercivity data on minor Cambrian age is inferred. An error made in the ongmal paper. dykes from three sites in W Sweden minor dykes yield an was later corrected by Prasad and Sharma (1980). The cor- overpnnt direction which can be of Palaeozoic age. rected value is used m this catalogue Ref: Steam and Piper (1984); L&de and Pesonen (1985). Ref: Prasad and Sharma (1978. 1980).

PO3-043 Hunnedolen dykes, N(A) QO2-003 Fen carhonatlte complex, N(B)

Age: 842-950 Ma (Poorter, 1972a). Age: 533f15 Ma (Rb-Sr), 413-605 Ma (K-Ar). Brock These dykes trend N60E and are clearly more highly al- (1964) and Priem et al. (1968). Dolerite dykes cutting the Fen tered than the Egersund dykes (entry PO3-026). Although no complex yield ages of 243-250 Ma (K-Ar; Priem et al., 1968). baked contact test results are available, the ages most likely Samples collected from haematite-enriched carbonatite. refer to the time of uplift and cooling of the terrane. rather NRM probably of Late Cambrian age. One-directtonal group- than to the ttme of intrusion. mg (see also entry QO4-005) provides evidence for a later Ref: Poorter (1972a). (Palaeozoic) overprint m the Fen complex. Ref: Poorter (1972b) PO3-044 SW Swedish amphrbobtes (H, W), S(D)

QOZ-004 AIn6 Complex B, N(C) Age: Not dated.

Comprises sites ZPH and ZPW of Poorter (1975). Large Age: 545-589 Ma (K-Ar; Doig, 1970; Welin et al., 1972; scatter in NRM directions, but the mean clearly shows a Krestenet al., 1977). 553+6 Ma (Rb-Sr; Brueckner and Rex. Sveconorwegtan pole on the APWP. Both polarities are pre- 1979). sent, hence mixed polarity. Magnetic dtrecttons of carbonatitic rocks divided into two Ref: Poorter (1975). groups (A and B) by the author, This entry lists the group B data (all of normal polarity). PO3-045 SW Swedrsh amphlbolites (W2), S(C) Ref: Piper (1981).

Age: Not dated. QOZ-OOS Aln6 Complex A (R), N(B) Data from stte ZPW of Poorter (1975). Both polarities are present, hence mixed polarity. ’ Age: See 402-004. Ref: Poorter (1975). Gentle westerly (R polarity) directions. Ref: Piper (1981); LXhde and Pesonen (1985). PO3-046 mean SW Swedish amphibolites, S(C) QO2-004 Alnb: Complex A (N), N(B) Age: Not dated. The mean of entnes PO3-044 and 045. Age: See QO2-004N polarity data. Ref. Poorter (1975). Ref: Piper (1981); L&hde and Pesonen (1985). CAIALOGL’E OF PALAEOMAGNETIC DIRECTIONS AND POLES FROM FENNOSCANDl4 179

Q07-007 B&fiord dukes. N(B) QO3-004 wtean Suh~elmn gabbro CC), N(C)

Age: 640 Ma (K-Ar; Beckmsale et al.. 1976). Age: See QOZ-002. These verttcal, NNE-trending dykes intrude the Barents Combined mean of the N and R polanty data Sea Group sedtments in the Varanger Peninsula of Fmnmark Ref: Piper (1974): Lahde and Pesonen (1985). and are of Late Precambnan age. The dykes are slightly altered. but do not show quenchmg effects. The alteratron QO3-005 Ask@ piuton (Al), N(B) occurred much later, perhaps related to Palaeozotc metamorphtsm. The palaeomagnettc pole of thts dyke swarm was mter- preted hy Kjode et al. (1980) as mdicatmg dextral movement Age: The NRM 1s interpreted as havmg been acquired of more than 1000 km along the Trollfjord-Komagelv fault dunng Late Ordovtctan metamorphtc resetting (F.other et al.. after mtruston of the dykes. See also Pesonen et al. (1989) for a 1987). dtfferent tnterpretatton Thus entry lists the group Al data. whtch are less dtstmct Ref: KjSde et al. (1978): KjGde (1980); Pesonen et al. than the group B data (see entry QOS-011). Both polanttes are (1989) present m thts pluton Ref. Rother et al. (1987) QOJ-00X Kongsf ord &jkes, N(D) Silurian Q04 Age: Inconclustve radtometric data give ages m the 935% 1946 Ma range However, these dykes intrude the Late Pre- QO4-001 Oslo igneous rocks (A), N(D) cambrtan Barenta Sea Group and are thus probably of Late Precambrian-Cambrian age (Beckinsale et al.. 1975). Most samples are magnettcally unstable. Three samples show con- Age: K-Ar dates yield ages of ahout 424 MI (Versteeve. srstent dtrecttons which agree wtth that of the Batsfjord dykes 1975; Dons and Larsen, 1978). (entry QO2-007). These rocks are products of the Oslo Igneous episode Ref. Kjode et al. (1978): KjGde (1980): Lahde and Pesonen Samples were taken m the southern and western parts of the (1985) Oslo Rtft. Palaeomagnettc direction and pole were calculated by Llhde and Pesonen (1985) from ftg. 2 of the author’s Ordovician Q03 ongmal paper (Storetvedt et al.. 1978). It IS uncettam whether the direction should he corrected for tectomc ttlt, as was done for the younger B pole of the same formatton (entry QO6-001) in the same study Age. Ordovtctan. Btostratigraphrc evtdence (Claesson, Ref Storetvedt et al. (1978): Lahde and Pesonen (1985). 1977) Sampled from the provinces of NPrke. ijstergotland and (iland m southern Sweden. The steeply inclined, fairly stable QO4-002 S&-L) nappe dolentes (A). S(C) direction identified probably represents an unresolved multtcomponent system. Age. 665 Ma (“‘Ar-39Ar: Claesson and Roddtck, 1983). Ref Claesson (1978). 720+225 Ma (Rb-Sr; Claesson. 1976). 59992576 Ma (K-Ar, Claesson. 1976; Point et al., 1976). QO3-002 Sulqelma gabbro (R), N(D) Palaeomagnettc data from the NNW-trendmg Ottfjlllet dykes. which have been translated wtth the Sgrv nappe, part of Age: Early-Mtddle Ordovician on strattgraphic evidence. the Scandinavian Caledomdes. The dykes are compostttonally An age of 443 + 16 Ma (Rb-Sr; Wilson, 1972) obtained for the abyssal tholeiites and not oceamc. They are probably related to related Furulund granite grves the mtmmum age for this gab- the early stages of the openmg of the lapetus Ocean The bra. The peak of metamorpmsm. however. appears to have nappe movement probably took place m Silurian-Early De- occurred during the Wenlocktan (ca. 430-420 Ma) or voman ttmes. Ludlowtan (ca. 420-415 Ma). Both polanties are present The Ref: Bylund and Zellman (1980). R polanty mean (with a large scatter) was calculated from the author’s ortgmal tables nappe dolerites (B), S(C) Ref: Piper (1974): LYhde and Pesonen (1985). QO4-003 Sarv

QO_?-003 Sulrtylmu gabbro (N). N(D) Age: See QO4-002 Thts entry lists data from dolerites of the main part of the Age: See QO3-002. SBrv nappe. The NRM is interpreted as representing the re- Mean of the N polanty data, as recalculated from the magnetizatton during the nappe translatton roughly m ortgmal puhlicatton Silunan-Devoman times (syntectonic). However, the author\ Ref: Piper (1974): Lahde and Pesonen (1985). point out that the mAr-39Ar data of Claesson and Roddtck (1976) suggest a Late Precambrtan age for these dolentes and that the magnetlzatlon may be primary. but anomalous due to nappe rotanons. Age: Late Silurlan on biostratlgraphx evidence tl’lars~m. Ref: Bylund and Zellman (1980). 1979). Ref: Claessson (1979). QO4-004 Ro’ysmg dyke (PC), N(C) QO4-011 Scama Irmatone, S(C) Age: See QO4-002. This dyke mtrudes an outlier of the S&v nappe and belongs Age: Late Silurian on biostrati~a~~c evidence to the group of Sfrv nappe dolerites (see entries 404-002 and Ref. Claesson (1979) 003). Ref: Bylund and Zellman (1980) QO4-012 Fongen - Hylhngen gabbro (PI), N(B)

QO4-005 Fen Complex overpnnt, N(C) Age: Probably Late Silurian, biostratigraphy. The studied rocks include gabbro, amphibohtied gabbro Age: E&mated age for this overprint is ca. 370-570 Ma and trondhjemite. Two palaeomagnetic dIrecttons established (see Storetvedt. 1973) and entry QO2-003. (see also entry ~5-~). The anomalous pala~~etjc direc- Both polarities are present, but only the R polarity mean is tion in this entry 3s attributed to nther a geomagnetic excur- listed here (the estimated N polarity mean direction is D = 30”. sion or to a rotation by ca. 90” of the gabbro around a vertical 2 = - loo). Thus overprint is probably related to the metasoma- axis during late Caledonian time. tism m the Fen Complex during Silurian time. Ref: Abrahamsen et al. (1979); Abrah~sen (1985). Ref: Storetvedt (1973); L&de and Pesonen (1985). Devonian QO!5 Q#-006 Rmgerlke San&tone, N(D) QOS-Oili Riirogen san~tone, N(B)

Age: Middle-Late Silurian, based on bmstratigraphy. Age: Early Devonian on biostratigraphlc evidence. No High-temperature component estimated by L&de and Pesonen tectonic or magnetic age control. (1985) from original data. Ref: Storetvedt and CJellstad f1%6): Storetvedt et al. (1967) Ref: Storetvedt et al. (1967, 1978); L&de and Pesonen (1985). QOS-002 H6stemen sat&one (A). N(A)

Q@Wi?7 Ringer&e sandstone (hb), N(A) Age: Devonian on stratigraphic evidence. Study on Devonian sandstone and its substrata. A post- Age: Probably mid-Late Silurian on palaeomagnetic evi- tectonic magnetization component isolated from both sand- dence (Douglass and Kent, 1986). stones and the basement. Negative tilt test. Magnetic fabric High blocking temperature data isolated by detailed ther- studies show penetrative cleavage. Both polarities present and mal dema~~zation. Both polarities are superimposed in the superimposed in the same specimens, hence mixed polarity. same samples. Positive fold test. One of the few mid-Palaeozoic Ref: Torsvik et al. (1987). key poles from Fennoscandia. Ref: Douglass and Kent (1986). QOS-003 ~~teine~ sandrrone f&l, N(B)

QO4-05%Gotland FoNingbo limestone, S(C) Age: The age of the B component is probably Mesozoic as it was isolated from samples from shear zones activated during Age: Middle-Late Silurian on biostratigraphic evidence Mesozoic movements. (Claesson, 1979). The author is scepticaf about the results Bipolar stable magnetization. owing to the weak NRM in these rocks, but argues that the Ref: Torsvik et al. (1987). magnetization muld be of Late-Middle Silurian age. Ref: Claesson (1979). QO5-004 Fongen - ~yI~ingen gabbro fP2], N(B)

QO4-009 Got/and Dacker hmestone, S(C) Age: Probably Early Devonian (estimated). This magnetic direction in the Fongrm-Hyllingen gabbro is Age: Middle Silurian on biostratigraphic evidence (Claes- less well defined than the Pi component (en@ 404-012). It sonJ979). may also represent ~st-int~~on tectonic movements as chs- Weak NRM intensities (see entry QO4-008). cussed in Abrahamsen (1985). Ref: Claesson (1979). Ref: Abrahamsen et al. (1979); Abrahamsen (1985). CATALOGUE OF PALAEOMAGNETIC DIRECTIONS AND POLES FROM FENNOSCANDIA 181

QOS-005 Koamshesten Old Red Sat&tone (R), N(B) Carboniferous Age: Middle-Late Devonian on brostrattgraphic evidence. Thrs entry (reversed polarity) is probably an overprint QO6-001 Oslo rgneow rocks (B). N(B) acquired during diagenesis. The palaeopole deviates by more than 15’ from other Devonian palaeopoles. Age: Although not directly dated. the rocks of thts entry Ref: Lte et al. (1969). are considered to be of Late Carboniferous-Permian-Jurassic age (see also entnes QO4-001. QO6-011, QO7-008, tp8-001 and QOS-006 Kvamshesten Old Red Sandstone (N), N(D) QO9-002 to 003). According to the authors. tke magmattc acttvtty. whtch propagated from S to N. was uuttated durmg Age: See QOS-005. Carboruferous and ended with dyke acttvtty m Jurasstc and Normal polanty data from two samples. Tertiary ttmes Generally. palaeomagnettc data with gentle Ref: Lte et al. (1969). mclmations are taken as Carboniferous whtle thore wtth mter- mediate inchnattons are considered as Permian Thus entry lists QO5-007 Kvamshesten Old Red Sandstone, N(A) the R polanty data on sediments mterbedded m and baked by lavas. Ttlt orrectton applied. Age: See QOS-005. The NRM IS probably of syntectomc Ref: Storetvedt et al. (1978): thts work age. recording thrust movements dunng Late Devonian-Early Carboniferous ttmes. QO6-002 Siirnti aikalrne bo& (I). S(B) The fold test is negative, but 30% unfolding was applied to the data. Magnettc fabnc and crystallinity studies were also age: 287 f 14 Ma (Rb-Sr: Bylund and Patchel t, 1977) conducted Study made on an Isolated peralkaline syemte site. Ref: Torsvik et al. (1986). Ref: Smtth and Piper (1979)

QOS-00X Ytterbvlamprophvre. N(C) QO6-003 SSirna alkahne bodv (2). S(B)

Age: 363k15 Ma (K-Ar: Pnem et al., 1968) 256 Ma (Rb-Sr.btottte), 370 Ma ( 39Ar-40Ar; Mttchell and Roberts, Age: See QO6-002. 1987) Three sttes studied (see QO6-002) Results based on two samples only. New palaeomagnetic Ref: Bylund and Patchett (1977) data suggest Permtan rather than Devonian age (Torsvtk, pers. commun.. 1989). QO6-004 menn Stirnu alkahne bodv. S(A) Ref: Storetvedt (1967).

Age: See QO6-002. QO5-009 Hornelen San&tone (A). N(A) Combmed mean of two studies on Sarna zlkahne body (entnes QO6-002 and 003). Age: Upper-Lower Devoman (fossil evtdence). Ref: Srmth and Piper (1979). Two palaeomagnetic dtrecttons Isolated, both of dual polartty. Group A arguably of synfold ongin (20% unfolding ap- QO6-005 E Vtistergiitland ~111,S(B) phed) and of Late Devonian to Early Carbomferous age. Magnettc fabnc study Included. Ref: Torsvik et al. (1987) Age: 287f15 Ma (K-Ar; Pnem et al.. 1968). These dolente sills cover the Early Palaeozc’tc sediments QOS-010 Hornelen Old Red Sandstone (B), N(B) See also entry QO7-017 for slightly younger ages from the western part of Vlstergotland County. Ref: Mulder (1971). Age. See QOS-009. Group B data related to Mesozox faultmg and shearing. Both polanttes present. Magnetic fabric studtes included. QO6-006 Scanta dolerrtes (A), S(A) Ref Torsvtk et al. (1987). Age: K-Ar ages range from 200 to 425 Ma; average age ca QOS-OI I Ask6,v pluton (B), N(C) 300 Ma (Klingspor, 1976). The dykes strike NW-SE and cut Precambnan gneisses Age: Palaeomagnettc data indicate Late Devonian age. and Lower Palaeozoic sediments. The dolentes are slightly Less well established group B data from the Askiiy pluton older than the melaphyres (entry 407-001). Two studtes have (see entry QO3-005). Dual polarity. been made on these dolentes (see also QO6-007). Ref: Rother et al. (1987). Ref: Mulder (1971). Q/~-00’ Stunro dolerrtes (RI. .~(A,

Age. See QO6-006. Age Permtan age for these dykes inferred from geologtcal Ref. Bylund (1974) evrdence (cross-cutting relationships) and from palaeomagnettc data. The palaeomagnetic directtons of the Arrndal dtabases QO6-008 KragerG dukes, N(C) are divrded mto five groups accordmg to mchnauons. and are probably post-Permtan remagnettzation effects. Both drabases Age: Probably Late Carboniferous or Early Permian. and lamprophyres are present. Dykes mtruded fracture zones palaeomagnettc evidence. that were actrve before and after the mtrustons Thrs entry hsts See also entries 411-002 and 003. the group A data. which are probably of Early Permian age Ref: Storetvedt (1968); LSihde and Pesonen (1985) Ref Halvorsen (1972); Lahde and Pesonen (1985).

QO6-009 Stabhen ~111(hb), N(B) QO7-004 Arendal dtabases (B), N(B)

Age: 297 k 8 Ma (Rb-Sr. whole rock; R&heim, 1974). Age: See QO7-003. Thts study deals with a profile through a smgle syemte stll. Steeper (reversed) inclination than in 407-003. This may be Two magnettzation duections established. Ths entry lists the due to post-Permian overprint. hrgh blocking temperature (hb), presumably a primary compo- Ref: Halvorsen (1972); Lahde and Pesonen (1985). nent of Carboniferous age. See also entry QO6-010. Ref. Sturt and Torsvtk (1987). QO7-005 Arendal dtabases (C). N(B)

QO6-010 Stabben stll (lb), N(B) Age. See 407-003. Magnetization probably of Late Age: Magnetization probably of Mesozoic/Ternary age Carboniferous-Early Permian age. (see QOl-010). Ref: Halvorsen (1972); L&hde and Pesonen (1985). This entry lists the low blockmg temperature component of N polanty. which overprints the R polarity hb component QO7-006 Arendal diabases (Dl). N(B) hsted in entry QO6-010. Ref: Sturt and Torsvtk (1987). Age: See 407-003. Magnetization may be a post-Permian overpnnt. QO6-01 I Oslo graben lavas, N(D) Ref: Halvorsen (1972); Lahde and Pesonen (1985).

Age: Probably Carbomferous, based on palaeomagnetic data. Q07-007 Arendal dtabases (DZ), N(B) Data from three sates listed in abstract by Douglass and Kent (1986) wrthout statrsttcs Age: ‘see 407-003. Ref: Douglass and Kent (1986). This entry has the steepest (reversed) inclinations and may represent a post-Pemuan overprint. Permian Ref: Halvorsen (1972); Llhde and Pesonen (1985).

QO7-001 Scania melaphyres, S(A) QO7-008 Oslo lgneour rocks (I), N(B)

Age: 250-285 Ma (K-Ar; Klingspor, 1976). Age: Permian (estimated). Some of the melaphyre dykes are altered by post-intrusion Samples taken m two areas of the Oslo igneous provtnce. autometamorphism. Several rock types present. The data in this entry are the mean Ref: Bylund (1974). of all the data of a variety of rock types. The data are dip corrected. QO7-002 Sunnhordland dvkes (R), N(B) Ref : Van Everdmgen (1960)

Age Three episodes of dyke intrusions according to K-Ar datmg: (i) 275 Ma, (ii) 220 Ma and (iii) 160 Ma (Faerseth et QO7-009 N.v - HeNesund dykes. N(A) al., 1976). The R polarity data were calculated from intersecting great circles yielding a Penman palaeopole (see also entry Age. 255-380 Ma (K-Ar; Halvorsen, 1970). Qo9-001). The diabases occur as both dykes and sills. Ref: Lovlie (1981). Ref: Halvorsen (1970; 1972). C4TALOGLiE OF P4LAEOMAGNETIC DIRECTIONS AND POLES FROM FENNOSCANDIA 183

Q07-010 Gjerdrngen lawrktte, N(C) QO7-016 menn Bahusliin &kes (RP.PD.D). S(A)

Age: Not dated, but a Permian age assumed on Age: See Q07-011. palaeomagnetic evidence Mean of entries 407-013 IO 015. A posstble trend m the Rocks demagnetrzed only to 15 mT. This study ESpart of a palaeopoles of the Bohuslln dykes mdtcated by steepemng of larger study of magnettc anomahes related to the larvikite. The inclmattons from RPM over RPC to PD and to I’. mean direction and statistics recalculated by Lahde and Ref: Thommg and Ahrahamsen (1980); Llhde and Pesonen Pesonen (1985) from ftg. 6 of onginal publicatron. (1985). Ref: Kristoffersen (1973): Lahde and Pesonen (1985).

QO7-011 Bohwliin dykes (RPM), S(B) QO7-017 W Viistergbtland stll. S(B)

These dykes are due to wtdespread NNW or N-S trendmg Age: 282 + 50 Ma (K-Ar; Pnem et al.. 1968) lice also entry Permian dyke activtty m the Bohuslln Provmce on the west QO6-005 The age difference between these mtrustons IS so coast of Sweden. Possrbly related to events m the Oslo Rift. small that they may belong to the same mtrusron penod Multtple mtrustons are present, and the groupmg ts based on Ref: Mulder (1971). mtrusron types. Age. Not dated. but a Permian age assumed on QO7-018 Brumunddal Iava.s. N(C) palaeomagnettc basts. Thts entry lists the marginal rhomb-po~hy~ dyke data. Age: Not dated, but the lavas belong to the Penman Oslo Geologtcal evidences suggest that the RPM dykes are older Rift. than the RPC dykes (entry QO7-012). Positive baked contact Data m thts entry were recalculated from ftg. 5 (Storetvedt test and Petersen, 1970, p. 576). and are after 50% unfoldmg as Ref: Thorning and Abrahamsen (1980); Lahde and Pesonen proposed by the authors. See also entnes QOS-002 to 004. (1985) Ref: Storetvedt and Petersen (1970). thts work QO7-01-7 Bohusllin dykes (RPC), S(B) Triassic QO8 Age: See 407-011. Central parts of the rhomb-porphyry dykes considered the youngest dykes in the area. QOS-~1 Oslo Igneous rocks ill), NfCj Ref: Thoming and Abrahamsen (1980); L%hde and Pesonen (1985) Age. Not dated, but ages of nearby tgneous rocks are Qi?7-013 ntenn Rohusllin dvkes (RP). S(A) 276*2 Ma (Heter and Compston. 1969). K-Ar ages group m the mtervals 260-270 Ma and 230-240 Ma (fneson et al., Age. Permtan. see Q@7-01 I. 1975). For further drscussron of radrometnc ages, see Sundvoll Mean of Bohuslln rhomb-porphyry dykes (entries QO7-011 (1978). and 012) Thts entry lists the R polanty data, which are probably Ref: Thorning and Abrahamsen (1980): Lahde and Pesonen Trtasstc or Jurassic. (1985) Ref: Storetvedt et al. (1978); Lahde and Pesonen (1985).

QO7-014 Bohusliin porphyv dvkes (PD), S(B) QOS-002 Brumunddal iaLla. (R). N(C) Age. Not dated. but considered to be Penman on palaeomagnettc evtdence. Age. Not dated, but a Trtasstc magnettzat on age IS m- These porphyry dolerites strike NNW and are up to 10 m ferred from palaeomagnetic data (Storetvedt and Petersen. thtck. They show chtlled margins against the granittc wall 1970) rocks. These data on reversed polanty were recalculated m thta Ref: Thoming and Abrahamsen (1980); L&hde and Pesonen work from fig 5 (Storetvedt and Petersen, 1970, ~576). as (1985) these authors do not list the data accordmg to polanttes. Ref: Storetvedt and Petersen (1970). thts work QO7-015 Bnhusfiin dolente &kes (01, S(B)

Age: See Q07-011. Probably slightly older than Q07-011 QOS-003 Brumunddal laws (N). .v(C) and 0127 For geological reasons the inferred age order is, QO7-015 (oldest). Q07-014 (mtermedrate). QO7-011 (youngest). Age: See QOS-002. Large scatter m directron. These dolente dykes are very Thrs entry hsts the N polanty data as recalculated from ftg. narrow. 5 (Storetvedt and Petersen. 1970, p.576). and are after 50% Ref: Thorning and Abrahamsen (1980); Lahde and Pesonen unfolding. (1985) Ref: Storetvedt and Petersen (1970): this work. These basalts have both polar&es but the reversal I\ not exactly 180”. No correlatton found between K .4r ages dnd .4ge. See QOS-002. polanty. The entry lists the N polanty sate mean data. Data m Thea entry IS the combmed mean of N and R polartty data the catalogue are from Bylund (LYXI). and mclude data from hsted by Storetvedt and Petersen (1970). Bylund (1973). Schwettzer (7975) and unpubhshed result\ Ref. Storetvedt and Petersen (1970); thts work (Bylund. m prep.). Schwettzer also carned out palaeointenstty determmatlons. Jurassic Ref: Bylund (1981)

QOWOl Sunnhordland alkaline dykes (N), N(B) QIO-002 Scanran basalis (R), S(C)

Age: Three episodes of dyke intrusion reported: at 275 Ma, Age: See QlO-001. R polarity data. 220 Ma and 160 Ma (K-Ar: Faerseth et al., 1976). On Ref: Bylund (1981). palaeomagnetic evidence, the N polarity component is younger than the R polarity component (see entry Q@7-002). QIO-003 mean Suntan basalts, S(E) Ref: L&lie (1981).

Age: See QlO-001. QOU-002 Oslo dyke rocks (R), N(C) Combined R and N polarity means. Ref: Bylund (1981). Age: Palaeomagnetic dtrection suggests a Mesozoic, possibly Jurassic, age. QIO-004 LappaJtitvt tmpact structure, F(C) The dykes trend NNW-SSE and NNE-SSW. Ref: Storetvedt et al. (1978); L&de and Pesonen (1985). Age: 77.3 50.4 Ma (40Ar-39Ar; Jessberger and Reimold, 1980). Q09-003 Oslo dvke rocks (N), N(C) The NRM was probably acquired during (rapid) cooling of impact melt rocks. The direction is therefore a spot-reading of Age: See QO9-002. Palaeomagnetic data suggest a Jurasstc the Earth’s magnetic field and hence the pole position (imply- age for the N polarity data listed m this entry. mg an age of ca. 200 Ma on the European APWP curve) IS a Ref: Storetvedt et al. (1978): Lahde and Pesonen (1985). VGP. On the other hand, the anomalous NRM direction may suggest that a post-impact tectonic tilt is uncorrected. QO9-004 Soira dykes, N(B) Ref: Pesonen et al. (1984); Pesonen (in prep.).

Age: Probably ca. 250 Ma old on palaeomagnettc evidence Tertiary Qll (L&he and Mitchell, 1982). These dykes record a stable NRM, which IS interpreted as Ql l-001 Dellen impact structure, S(B) representmg the blocking of remanence during uplift related to Kimmenan (ca. 160-150 Ma) basin development in the North Sea region. Negative baked contact test (see QO9-005). The Age: Not dated, but thought to be of Tertrary age. Data magnetization could thus be of Middle-Late Mesozoic age. from Impact rocks may represent only a spot-reading of the Ref: L&lie and Mitchell (1982). Earth’s magnetic field (see entry Q10-004). Ref: Bylund (1974).

QO9-005 Sotra baked rocks, N(C) QII-002 Kragerii dykes B(R), N(B)

Age: See 409-004. Negative baked contact test (cf. 409-004). Age: Not dated. Tertiary age estimated from Ref: L&lie and Mrtchell (1982). palaeomagnetic pole interpretation. Both polaritres are present and the reversal ts symmetric. Cretaeeous This entry lists the R polarity data. Ref: Storetvedt (1968).

QIO-OOI Scantan basalts (N), S(A) QII-00s Kragerii dykes A(N), N(C) Age: 81-169 Ma (K-Ar; Prinzlau and Larsen, 1972; Klmgspor, 1976), Middle-Late Jurassic on fossil evidence. Age: See 411-002. Volcanism in Scania probably started in the Mtddle-Late This entry lists the N polarity data Jurassic and ended in the Cretaceous. Ref: Storetvedt (1968). TABLE 1

Tectonomagmatic blocks and their numbers, and the applied codes (keys) for the Fennoscandian palaeomagnetic database

No Name of tectonic block, magmatic Block number Geological era or Age interval Database-code province or geological period period (MaI (block key)

Precambrian data

1. Karelian Craton /I/ Archaean 2600 A01 $ Central Lapland block Lapponian 2600-2350 JO1 2. /2/ $ 3. South Karellan block /3/ Jatulian-Svecofennlan 2200-1700 JO2 ij 4. North Central Karelian block /4/ Svecofennian 1900-1700 JO3 0 5. Lapland Granulite Belt(LCB) /5/ Late Archaean-Svecofennian 2700-1700 EOl z 6. Raahe-Ladoga block /6/ Svecofenman 1950-170 so1 7. Central Sweden-South Flnland block /7/ Svecofennian 1950-1700 so2 8. North of Skellefte; block /8/ Svecofennian 1950-170 so3 9. Kola block /9/ Archaean-Svecofennlan 2900-1700 so4 10. Inlier in NW Sweden /16/ Svecofennian-SubJotnian 1950-1500 so5 11. Central-North Lapland block /2/ Lapponian-Svecofennlan 2450-1700 SO6 12. Trans-Scandinavian Granite Porphyry Belt (TSGBJ /IO/ Subjotnlan 165C'-1300 BOl 13. Southern Finland block /7/ Subjotnran 1650-1300 B02 14. South Central Sweden block /7/ SubJOtnian 1650-1300 803 15. Bornholm island /ll/ Jotnian-Sveconorweglan 1300-850 A01 16. CSDG-Satakunta complex /12/ Jotnlan 1300-1100 GO1 17. CSDG-Ulvb complex /13/ Jotnian 1300-1100 GO2 18. CSDG-Dala complex /I4 Jotnian 1300-1100 GO3 19. CDSG-Jzimtlandcomplex /15/ Jotnian 1300-1100 GO4 20. CDSG-anomalous sites /14/ SubJotnian-Jotnian 1650-000 GO5 21. East of Protogine Zone /lO/ Sveconorweglan 1100-800 PO1 22. Within Protogine Zone /17/ Sveconorwegian 1100-800 PO2 23. West of Protogine Zone /18/ Svegonorwegian 1100-800 PO3

Late Precambrian-Phanerozoic data

24. Late Precambrian/Cambrian 640-505 (302 25. Ordovician 505-438 903 26. Silurian 438-408 QG4 27. Devonian 408-360 905 28. Carboniferous 360-286 PC6 29. Permian 286-248 007 30. Triassic 248-213 908 31. Jurassic 213-144 QG9 32. Cretaceous 144-65 410 33. Tertiary 65-2 011

Number between slashes refer to tectonomagmatic blocks as shown in Fig. 1 (see also Pesonen et al., 1989). Age intervals refer to approximate age intervals (in Ma) of the blocks. Database codes (block keys) are used in the catalogue and also in the abstracts. Same codes will be used in the microcomputer-based database presently being compiled (see Pesonen and Torsvik, 1990). z TABLE 2

Palaeomagnetic directions and poles from Fennoscandia: Archaean to Tertiq

LAT LON B/N/n P D I i> 95 )1 we m PLAT PLON dp (A951 dm t & Rrf

KARBLIAN CRATON [AOl). ARCHAEAN

A01401 Varpals~awl wartz dlorlte, F 63.4 27 8 W/12/64 N 305.0 73.0 47 139 2680~3 g 63 9 313 0 75 8.4 a,t

AOl-002 N,le,a tonalltlc dykes, F 63.2 28.2 *vu59 N 351.0 39.0 47 271 1830-1860 8 48.4 220 8 33 56 a,t

AOl-C03 Iis*lml gabbro-dlorltes. F 63.6 27 3 *6/64 N 328 0 36 0 16 1 16 - 2160 a 42.0 249 0 10 9 1R' a

AOi-004 Ilsslmi dlabase dykes, F 63 7 27.5 +4/12 N 339." 55 0 14 0 44 a 59 0 241 0 14 0 199 a

AOl-005 Nils&a dlabasa dykes II, F 63 4 27 9 'Z/2 N 344 0 36 0 (7.31 ItiOO-2100 a 45 0 229.0 (4 9 651 a

AOl-006 Nllsla dlabase dykes I. F 63.4 27 9 ‘11/17/140 N 15 0 38.0 5.4 73 - 2160 a 47 1 187 R J8 64 a

CENTRAL LAPLAND BLOCK (JOl). LAPPONIAN

JOl-001 Kuusamo dykes & greenstones, F 66.1 29.3 *u/47 N 342 0 43.0 14.9 39 - 2160 g.d 47 3 233 7 11 4 185 a

SOUTH KARELIAN BLOW (5021. JATULlAN

502-001 Palvglkoskz-Sydte gabbro. F 65 6 27.9 ‘3/31 N 1.0 36.1 30 0 I* - 2460 g 45.6 206 6 71 0 354 a

JO2-032 Hyyplb metadlabascs. F 62 d 30.3 *2/19 N 353 0 68.0 (24.51 - 2100-2*00 P 78.0 232 " (34 5 41.0) a

502~003 Eno metadlabarss. F 62.9 30.0 ‘3/X N 7.0 55.0 47.0 8 2100-2200 8 62.3 197 1 47.3 667 a

502-004 Mean metadiabases. F 62.7 30.2 ‘2/5.‘50 N 1.0 62.2 2100-2200 g 70.8 208.1 (42 5) a

JO2-005 Vazhinka-Pukhta upper R, U 61 5 34.0 -/*3 R 165.0 -15 0 8.0 239 1850-1950 a,I 35 0 232.2 42 RZ a,t

302-006 VsJllnka-Pukhta uppermost N,U 61.5 34.0 -/*4 N 345 0 21 cl 8.0 130 1850-1950 a.1 38.2 232 9 d 4 A.4 a,:

JO2-M)7 Vathlnka-Pukhta upper N, U 61.5 34 0 N 341.0 23.0 - 1850-1950 a,= 38.6 238.0 - a,t

JOZ-008 Vazhnxka-Pukhta loax N, ” 61.5 34.0 N 350.0 39.0 1850-1950 a.1 49.9 226 5 - a,t

JO.?-009 Mean Vazhlnke-Pukhta N. U 61.5 34 0 l3/57 N 348 0 JO.0 5.0 20 1850-1950 a.1 44.0 231.0 30 50 a,t

502-010 Shokshe sediments. U 61 5 35.5 -/*29 N 344 .O 46.0 35 5a 1850-1950 a., 54.2 240.3 0 9 45 d,f

JW-011 Onepa-Rybreka sill, U 61.3 35 5 15/.I5 N 348 0 8.0 20 56 1600-1600 a 32 0 230.0 I u *o a,t

J62-0i2 Rybreka bakbd seduents, U 61 5 34.0 I/‘4 N 80 38.0 1600-1800 a 49 5 202.5 - il.f

NORTH-CENTRAL KARELIAN BLOCK iJO31, JATUtIAN

64 5 14 0 *2/7 N 359.0 58 0 (7.0) - 1610-1a70 a 65 0 217.0 (8 0 10.01 d

JO3-002 635 74.0 v/14 N 331 0 60.0 5.0 33 161G-i87C a 62.0 264.0 50 711 ? TABLE 2 (continued)

No Rock unit and/or com~o"ent.cou"try LAT LON B/N/n P D I II95 k age m PLAT PLON dp (A951 dm B hf.

503~co3 Central Karella ss. (11). " 64 0 34 0 hiI5 N 344.0 52 0 16.0 11 1610-1870 a 57 0 239.0 15 0 21.0 c Mctlh,nny & Cawley 11977)

503-004 Mean Central Karelka ss , " 63.8 34.0 *2/a/19 N 338 2 56.4 1610-1870 a 60 1 250.6 (29.9) C McElhlnny L Cowley (1977)

503-005 Central Karella dykes. " 63 5 33.5 z/*12 N 345.0 42 0 6.0 26 1610-1870 a 49 0 235.0 50 70 B McElhlnny L Cowley (19771

LAPLAND GRANULITE BELT iEO1). LATE ARCHAEAN-SVECOFENNIAN

E01-001 AkuJarvl quartz-dlorr te. F 68.6 27 8 Z/f10 N 330.0 40.9 60 64 - 1925 63 41.3 245.5 40 70 B Pesone” k Neuvonen (1981)

SO1 -002 AkuJarVl ,,yroxene granullte, F 68 6 27.8 Z/f2 R 109 5 -15 5 - - 1’325 g 14 4 282.4 D klpunen et al (1977)

E01-003 AkuJarvl pyr-oxene granullte, F 68 8 27.8 1/*1 N 320.11 41 0 - 1925 g 38.9 257.0 D Papunen et al. (19771

EOl-004 bhESJW#i gi-anUllte, F 68.8 26.4 2/‘2 N 338.0 27.0 17 91 - 1925 g 33.8 232.2 (4 7 8 61 0 !?apunen et al c 1977)

E01-005 Laan,ia diabase dykes, F 684 277 .3/18 N 348 6 -42 5 62 29 998*80 h -7 5 218.1 50 B Pesonen et al (1986)

RAAHE-LADOGA BLOCK (SOlI, SVECOFENNIAN

501-001 Yllvleska gabbro 1, F 64.1 24 3 -/f13 N 341.0 41 0 4.0 145 I1884 8 47 0 231 0 30

SOI-002 Yllvleska gabbro 2, F 64.0 24.3 ‘5142 N 311 .o 38.2 68 129 - 1884 g 43.3 232 4 48

SOI-003 PohJanmaa gabbro-dlcrltes, F 64.1 24 6 *5/45 N 332 3 29.2 13.4 34 - 1884 g 37 9 239 1 a.2

sol-004 Kluruves~ d~abase dykes. F 63.6 26.5 =3/34 N 337 7 38 8 26.0 14 a 45 7 236.8 18 1

SOI-DO5 Kluruvesr gabbro-dror,tes, F 63 6 26.5 ‘3/X N 341 0 3” 0 5” 61” 186W5 a 40. I 230 9 J I

SO1 -006 Mean Kluruves& ~ntruslons. F 63.6 26 5 *6/69 N 338 Cl 35 iI 10 D 46 1886=5 g 41 i 235 2 b b so1 -007 Rantasalml dlabase dyke, F 62 3 28 3 i/‘lO N 349.0 49.0 7.0 46 184o-lti80 d 57.0 225 9 6 1

Sol-OD8 Hauklves, quartz dlor~te, F 62.2 28 3 *2/21 N 348 4 41 5 152.81 - 1HHO d 50 9 225 2 139.3 sol-009 Haukavesl lampraphyres, F 62.1 28.4 ‘12/25 N 348 0 78.0 3 I 192 1831-LR40 g 4R ii 225.0 22

501-010 Plelavesl gabbra. F 63 6 27 6 +5/20 N 314 2 *J B 38 404 1*92=14 g 35 9 238.2 2 2

CENTRAL SWEDEN-SOUTH FINLAND BLOCK (X,2). SVECVFENNIAN

502-001 Sellr gabbro-anorthosltes, F ” lohnsx1 I 1979 1 so2-002 Se111 amphibolltes. F D Johnson ( LY79)

- TABLE 2 (continued) * iz

0 I ,195 k No Rock unit and/or component,country LAT LON BINhI P us m FLAT PLON dp lA95) dm t 8 Ref soz-003 hva m~g’atltes. F 604 21, 1/=2 7.0 49 0 (23.71 - 1850 a 59.1 189.2 (20 7 31 3) a.t

?.02-004 iva granites, F 60.5 21.1 2/+4 18.7 49.8 41.6 38 -1800 a 57 7 170.0 37.0 55 5 a,t

502-005 hva grenltes, F 60.6 21 1 *1/1 20.2 20 - a 28.4 178.0 - a so2-M)6 hva lamwophyres. F 60 5 21.0 4/v 16 0 51.0 16.2 13 a 59.3 173 7 14.8 21 9 a.t

SO2-007 &va amphibolltas, F 60.4 21 1 11.2 175 0 -10.0 -1850 a 34.5 207.1 - a.t

SO2-008 Ava monz~n~tes. F 60.4 21.0 2/'4 16 0 3.8 25.7 97 L@x-1630 g.a 30.2 182.5 12 9 25.7 a.t 7 502-009 Ava monzonltee, f 60.6 21 1 12/'12 26.0 31.0 17 0 1670-1830 B 42.3 166 5 10 6 L90 3 so2-010 Fb&o g~.anodu,r,te,F 59.9 20 1 1/*2 163.0 52.0 (14 7) - 1890 a -2.9 197.5 113 8 20 II a.t so2-011 Fb&o @bras, F 60.0 20.4 a/*4 348 0 5.0 - -1600 a 31 a 214 6 - *,t

SW-012 Ridwan. gabbra. S 59 3 19.0 .lL/71 356.3 11 5 83 31 1475-17M if 36 1 201 1 4 3 ti5 a,t

502-013 R&",,so dyke, S 59.3 19 0 1/=9 106.0 28.0 25.6 5 1475-1750 d -5 ” 268 0 15 0 27 0 d,f

SO2-014 Uppaala mctabaaite dykea, S 59.3 16.0 *a/23 1.7 30.6 97 9" a 47 c' 195 0 6" L1.D a,t

SW-015 Almunpe wtabaslte dykes. S 59.3 18 0 1/'10 104.0 9.0 99 25 a 3.0 274 0 50 10 0 a,t

$02-016 %a diwitt, S 58.5 15.6 l/*8 N a.4 46 a 7.5 55 1740-1860 G 590 188.0 60 10.0 a,t

502-017 NordIn+ 0rnskoldsv:k dykes (R1.S 624 184 "12/12 167.7 -53.8 82 29 1B5C1130 a 65.0 221.9 9.1 12.2 a,t

SW-018 Nordlngri Ornskoldsvlk dykes (N),S 62.4 18.4 *a/4 N 345.8 61.4 6.8 30 iR50+130 a 66 2 223.3 21.6 27 7 a,t

SO2-019 Nordzngrl Ornskoldsvlk dykes [Cl.5 62.4 18.4 *16/X c 167.3 -59.9 67 30 1m0=130 e 67 0 223 0 7 .7 10 2 a,t s02-020 ffamedolerltes. F 61.0 24.8 '19/lfd N 48.0 78.0 7.2 23 1550-1800 g.e 67 3 72 2 13.0 14 0 3,t

502-021 Keuruu H dykcs, F 62.3 24 7 *11/34 N 349.9 33.4 6.5 49 -1880 e.a 45.4 218 a a0 7.0 a,t

502-022 Keuruu R dykes. F 62.3 2a 7 *3/12 R 133.6 -I5 9 2.9 1694 - 1880 a.a 26 3 257.8 2.0 3.0 a,t

SW-w3 Keuruu R2 dyke. F 62.3 24.7 1/*2 A 166.2 -14.3 (35.3) -1880 g-a 34 0 221.3 (18.5 36 11 a,+

SO2-024 South Finland ~"truslons, F 60.6 22.4 *7/w N 329.0 29 0 16.6 14 -1880 a 39.7 242 6 10.0 L83 a so.?-025 Tannrelalntrusioos. F 60.7 23.7 2/'8 N 323.8 50.9 3.7 259 -1880 a 52.5 259.h 33

502-026 U1kkti1 Intruslans. F 61.7 27.3 .?/'I0 N 344 8 44 6 12.2 17 -1680 a 53.1 230 3 97

SO2-027 "yvu,kaa gabbro, F 60.6 24.6 -/-11 N 329.5 36 1 7.3 33 -1875 e 84.1 246.2 49 soz-028 Luontari grmmdlorlte, F 61.4 28.0 '25/211 N 50 58.0 70 16 1765-1790 g 67.0 198 0 8.0

NORTH OF SKELLEFTEA BLOCK [SO3J, SVECOFEHNIAN

503-001 Terendo (gabbro1. S 671 225 *5/17 N 340.0 41 0 14.0 30 1757 = a3 g,a 45.0 228 0 so3-w2 T&rendo gabbro 2. S 67.1 *2 5 '5118 N 339 3 41.5 4.4 JO3 1757243 g.a 44.9 229 6

SO%W3 T%ircn& gabbro 3 (sxtes 3 & RI. 5 67 a 22 6 *ai5 N 310 2 23 8 132.?1 - ,780*49 g,a 26 i 258.9 so3-004 Tdrendo gramt~c dykes. S 67 I 22.5 l/X5 N JJj.0 51.0 10 0 90 - 1757 a 51.2 240.5

SD?.-005 Tare?& acid rocks. s 67 1 22.5 l3/12 N 321.0 42.0 18.0 51 -1757 a 41 7 248 4 s TABLE 2 (continued) ?

NO Rock unit and/or component.country MT LON B/N/n P D I ,195 k In PLAT PLON dp (A951 dm t Ref.

503-006 Nottraak gabbro, S 65.9 21.8 -5122 N 346.2 35.0 3.6 460 1e40t 390 a 42.6 219.7 2.4 4 1 a.t A Elmlng (1985)

503407 Nottrask gabbro IsIte 7). S 65.9 21.8 1/*3 N 3.1 39.3 4.4 792 1840: 390 b,e 46.3 197.7 3,1 5.2 a.t 0 ~imlng (1985)

503-008 Nottraak gabbro (site 1). S 65.9 21.8 1/*2 N 318.4 -3.1 (40.5) - 1800 b,e 16.3 245.6 (30.3 40.6) ~,t D Elmlng (1985)

503-009 Svappavaara gabbro 1 (hc), S 67.8 21.2 *4/17 N 336.4 51.9 5.4 293 1725-1880 g,e 52 2 234.6 5.0 7.3 8.t C Elmlng (1985)

so3-010 Svappavaara gabbro 2 (1~). S 67.7 21.2 l3/9 N 354.8 55.0 27.7 21 1725-1880 g.e 57.7 209.1 27.9 39.3 a,t C Elmlng (1985)

503-011 Vlttariglgabbro 1. S 67.7 21.6 *a/28 N 339.5 39.1 5.4 107 1707-1880 e 42.6 227.9 3.8 6.4 B.t A Elmng (1985)

so3-012 Vlttangl gabbro 2, S 67.7 21.6 l2/0 N 343.1 5.8 (7.31 1707-1880 e 24.2 220.3 (3.7 7 3) a.t C Elmlng (1985)

503-013 Dundret gabbro (71, S 67.9 20.7 1/*5 N 14.7 12.6 16.0 24 1890-1950 d 28.4 183.9 0.3 16.3 a,t C Elmlng (19851 8 so3-014 Dundret gabbra R. S 67.9 20.6 ‘4115 R 192.5 2.5 7.7 143 1890-1950 d 21 1 187.2 3.9 7.7 a.r cl Elmlng (1985) 6

$03-015 Dundret gabbro (site 8). S 67.9 20.7 l/*3 R 201.1 -34.1 34.9 14 1890-1950 d 39.7 174.3 22.8 40.0 a,t C Elmlng (1985) $

SO%016 Dundret gabbm (skt+ lo), S 67.8 20.7 If’3 N 283.5 3.0 36.2 13 1890-1950 d 6.6 278.7 18 1 36.3 a,t Ellnlng (1985) s z SO%017 Dusdret basic rocks CR), S 67.1 20.6 “3126 R 171.6 30.2 50.0 7 1530: 35 e,a 6.4 208.7 30.9 55.5 a,t p,per (Isaoa, I 503-018 Dundret basic rocks (N). S 67.1 20.6 l/.5 N 20.0 27.0 34.1 6 15302 35 e,a 34.0 177.0 20.0 37.0 8,t Piper f1980a) a 503-019 Kallax gabbro, S 65.8 22.0 - 1140 a 40.0 211.0 2.0 3.0 a,t PIper (19soal I/‘6 N 353.0 30.0 3.1 477 9

503-020 Kallax gabbm (lb 1, S 65.8 22.0 l/*8 I4 317.0 40.0 4.9 1ZE - 1740 a 39.0 257.0 4.0 6.0 a,t e PIper (ISBOa) ci 5 503-021 Kallax gabbro (hb I, S 65.8 22.0 1/*5 N 293.0 35.0 9.1 72 - 1740 * 27 0 279.0 6.0 10.0 a.t Piper (1980a)

503-022 Kallax gabbro 2. S 65.8 22.0 l/*6 N 347.0 52.0 3.6 353 - 1790 a 57.0 222.0 2.0 5.0 B.t Piper (19Soal

503-023 Korstrask gabbro, S 65.7 20.9 l/‘lO N 5.0 47.0 7.0 48 1530-1770 d.e.f 53 0 194.0 6.0 9.0 a,t Piper (1980&)

SO%024 Niaimsel gabbro, S 66.0 22.1 -2114 N 337.9 37 0 (14.91 1530-1770 d.e,f 42 4 230.6 (10.2 17.5) a,t PIper (19aoa). = so3-025 Nismisel dykes. S 66.0 22.1 ‘2110 N 342.8 32.8 (35.41 1530-1770 a 40.5 223.8 (22.7’ 40 1) a.t PIper c19soa1. * so3-026 Mean Nrem1sel lntruslons, S 66.0 22.1 l4/24 N 340.0 35.0 8.8 110 1530-3770 e,f 41.0 227.0 6.0 10.0 8.t PIper (19808)

SO%027 Sang~ gabbro 1. S 65.9 23 4 *11/35 N 358.5 39 5 2.8 264 1840 f 390 e 46 5 205.4 2.0 3.4 a,t Elmlng (1985)

503-028 San&s gabbro 2, S 65.8 23 5 *4/m N 357 .o 26.0 18 7 25 1530-1770 e 38 0 207 0 11.0 20.0 z!.t PlPW (19eOa)

503-029 San&s gabbro (lb 1, S 65.8 23 5 11’6 N 333 0 -2.0 17.9 15 1530-1770 c 80 230 0 10.0 19 0 a,t PIper 119t30a).l

__ - . - TA%LE2 (ctmtinuad) 8 TABLE 2 (continued) F F

NO Rock unit and/or componcnt.country LAT LON B/N/n P D I rt 95 k age m PLAT PLON dp (A95) dm t B Ref.

SOUTH FINLAND BLOCK (8021. SUEJOTNIAN

BOZ-001 Ava dlabase dykes. F 60.6 21 1 '2/2 N 18.0 18.0 -1550 a 36.9 1787 - - a,t c Neuvone” (1969)

BU2-oD2 Mean Ava I”tr”SlOnS. F 60.6 21.1 '15/15 N 25.0 27.0 15.0 7 - ,550 a 41.0 169.0 9.0 17.0 a,t El Neuvonen (1969)

BOZ-003 Korso dykes (R), F 60.4 21.0 'Z/2 A 188.0 24.0 (24.3) 1600=30 e*g 16.7 192.8 115.0 26 0) a.t c Neuvone" (1969)

BOZ-004 Kumllnge dykes, F 60.3 20.8 '3/15 R 191.6 29.4 21 4 34 1565-1599 e.g 13.4 189.3 13.1 23.6 a.t B Neuvonen L Grundstrom (1969)

802-005 Fog10 dykes, F 60.6 20.6 'a/56 N 12.0 4.0 11.5 24 1523-1553 e.g 31.3 186.5 5.8 11.5 a,t A tieuvonenk Grundstrom (1969) . BOZ-006 Kumllnge-Brando dykes, F 60 3 20.8 '7/25 R 196.6 30.2 7.9 60 1550-1559 e.g 12 2 182 0 50 9 0 a,t A Pesonen 6 Neu~onen (19811

802-007 Foglo-Sottunga dyiws. F 60.0 20.6 =6/25 N 11.2 -2.8 12.7 29 1523-1553 e.g 27 9 187.5 6.0 13.0 a,t A pesonen B Newonen (1981)

BOZ-008 Eckero dykes, F 60.1 19.7 z/*2 R 212.5 -42.5 - a 48.0 152.8 - - a,t D Neuvonen & Grundstrom (1969)

802-009 Kuasaarl doleate. F 61.2 26.7 l8llQ R 195.0 10.0 14.0 17 1630-1670 g 22 0 190.0 7.0 14.0 a,t A Neuvonen (1978)

BOZ-010 Makarla quartz dolerlte, F 60.5 22.5 1/'4 N 23 0 7.0 16 0 20 1500-1600 a 30 0 175.0 6.0 16.0 a C Neuvonen (1965)

B02-011 Non-a Seteson dyke, F 60.1 20.7 1/*11 N 19.3 29.1 10.1 24 1550-1600 a 43.3 174 8 6.1 11 1 a.t B Palm" (19621

BOZ-012 Foglo Bergskar dykt. F 60 0 20.6 1/*2 N 8.0 8.0 (8 31 1523-1553 g.e 33 7 191.0 (4 2 a.4) a.t D Johnson l1979), l

BOZ-013 Foglo urallte-porphyrlte, F 59.9 20.1 1/v R 198.0 16.0 (2 1) g.e 20.4 181.0 (1.1 2.21 a,t D Johnson (1979). l

302-014 Kumlinge-Bergskar dyke. F 60.3 20.8 1/*2 A 192.0 43 0 (14.6) 1599%26 e 41 189 9 (11.2 18 1) a,t D Johnson (19791. *

802-015 Korso dyke. F 60.4 21.0 l/.2 R 182.0 26.0 (14 7) 1599=x e 14.7 199.0 (8.8 16.1) a,t D Johnson (1979), l

B02-016 Vest Sederholm dyke. F 60.4 21.0 1/*2 R 198.0 14.0 (2.6) e 21 cl 181 6 (1.4 2.7) a,t D Johnson (1979). l

BOZ-017 Mean Brando A dykes. F 60.3 20.7 *4/a R 192 8 25.4 17.3 29 - 1550 g.e 15.6 187.7 10.0 16.6 a,t C Johnson (1979). f

BOZ-018 iland rapaklvl granite, F 60.5 22 3 l/f6 N 58 -18.6 18.8 14 1589-1659 g,a 19 5 194 4 15.0 18.0 a,t C Johnson (1979). *

B02-019 Maarla quartz dlorxte, F 60.5 22.3 L/*6 A 232.0 11.0 30.0 4 a 13.0 148.0 15.0 30.0 a C Neuvonen (1965)

SE quartz porphyre dykes, F 61.3 26.8 '9121 N 26.9 9.9 13.2 16 1617-1638 g 30 0 175.0 6.6 13 3 'a,, B Neuvonen (1986) LAT LON B/N/l? P a I 1195 k

SOUTW-CENTRAL SUEBEN SLOCK (BO3), SUBTOTNELH

63.3 16.1 “l/Z1 N 17.7 41.13 21.1 e 49.1 171.0 15.9 26.0 a,r

63.3 16.1 ‘4/z% R 201.3 -48.2 17 5 e "r3a 163 7 15.0 22.9 a,t

63.3 16.1 '11/61 N 18.2 66.4 8.9 e 51.3 169.5 71 51.2 a.r

63.3 k6.1 l15/87 c 18.5 45.7 6.9 & 51.6 168.6 5.7 8.9 a,t

63.3 16.1 -9147 R 181.9 2fj.a 18.6 c? 16.2 lQ4_2 .ll?.s a,t

63.3 16.1. '307 N 1.0 -32.2 XI.0 c 9.2 195.1 33 8 a,t

65.3 I6 1 +12/%4 c 181.7 23.5 1*.3 e 14.5 194.4 15.3 d,t

63.3 16.1 If*6 R 107,3 -63.5 4.1 a 71 8 179 5 11.5 14.5 a.t

63 3 16.1 f3/10 N 27.0 58,s 29.3 a 61.0 149.5 32 2 43.4 n.t

63.3 16.1 *4/24 C 37.6 btl.2 18.') s 64.1 154.5 21.5 28,d a.t

59.2 1% L '35/ M 358.5 -0.2 8.2 e 27 7 146.8 4.1 8 E a.r

59.2 iti. -181 N 11.1 51.3 10.1 c 61.7 176 1 9.3 13.7 a.t

60.5 15.3 3/*9 N Id.8 -18.1 9.6 e 21.1 160.4 5.2 10.0 a,t

59.1 16.7 ll"L3 N 26.0 -t.& 9.3 e 27.0 167.0 5.0 9.0 s.t

59.1 16.7 l/f. N 3m. 0 -1z.o - * -0.6 252.5 - a.t

61.9 16 4 *7/7 N 1.1 23.1) 9-P d 4o.a 197.0 5.2 4.8 a.t

R 231 3 -?.47 12.6 e.g 34.t 135 7 8.2 14.3 a.t

N 41.7 37.6 5.9 ?*Q 3% 5 141.6 4.1 69 a,t

C 48.0 37.1 5.3 e,g 36 9 138.1 3.6 6.2 a,t

R 229 7 -21.5 1fl.5 a 27.5 i41.1 92 17 4 R,r.

N 54.5 31.1 17.4 ci 38 4 154.9 11.0 19.5 ;i,t

‘.s.3 c 223 1 -25.t i) 25 ld9.0 77 I 34 7 z,t N 115.3 u,. 1 13.4 a 34.7 165 0 72 13.9 a,t s9 TABLE 2 (continued) 8 2

NO Rock unit and/or component,country LAT LON B/N/n P D I II95 k ais m PLAT PLON dp (A95) dm t 8 Ref.

BORNHOLM BLOCK CR01 ), JOTNIAN-SVECONORYEGIAN

ROl&ol KJeldsea dyke, D 55.0 15 0 l3/11 R 193.0 45.0 8.0 28 lCQO-1400 a.d 7.0 179.0 60 10.0 a B Schonemarul(1972)

ROI-002 Vast& dyke, D 55.4 15.2 *11/22 N 80.6 -44.2 a.9 26 -1200 a -16.0 127.8 6.3 10.0 a B Abrahamsen (1977)

ROl-003 Vlgehavn dyke. D 55.1 14.9 '-f/14 N 35 8 -25.7 6 1 97 - 1200 a 15 0 158.8 3.6 6.6 a c Abrahamsen (1977)

ROl-GO4 Bolshavn dyke IA). D 55.1 15 0 '9/35 N 42.2 -25.5 6.9 34 - 1200 a 12.8 152.9 6.2 9.6 a El Abrahamsen (1977)

Eolshavn dyke (8). D R01-005 55.1 15.0 If.6 N 332.9 -20.1 13.5 26 800-loo0 a 20.7 223.6 7.4 14.1 a C *brahmsen t19771 A

ROl-006 Llsted dyke, D 55 1 15.0 *x/44 N 306.6 -13.8 4.1 39 800-1000 a 13 8 250.1 2.1 4.2 a B Abrahamsen (1977)

ROl-007 Listed overprint, D 55.1 15.0 l/.4 R 280.0 70.0 Palaeazolc a 46.2 318 2 a rl Abrahamsen (1977). f

CSDG-SATAKUNTA COMPLEX (GOI), JOTNIAN

GOl-001 Setakunta sandstone, F 61.2 22.0 *lo/42 N 24 0 -41.0 10.0 24 13(M-1370 d,a 3.0 160.0 a.0 12.0 a.t B NeW?0nell (1974) GOI- Satakwlta s111s, F 61.2 22.0 l3/9 N 35 5 -34.0 - -1263 B 5.3 168.5 =.t D Neuvone” (1965), l GOl-003 Satakunta dolerlte dykes, F 61.2 22.0 *la/la N 46.0 -34 0 4.0 60 - 1240 B 2.0 158.0 3.0 5.0 a.t A NeUVOIll?tl (1965). l z GOl-004 Vaasa dolerlte dykes, F 63.0 20.9 *15/10a N 38.0 -29 0 5.0 54 1225-1270 g 70 164.0 3.2 5.5 A Neu"o"en (1965) =,t 9 G01-005 Gavle dolor.te. S 60.5 17.1 2/'15 N 48.5 -24.3 4.0 104 a 7.0 150.0 2.0 40 a.t 3 P00rter (1976) w COl-006 Market dolenten, F 60.3 19 3 'E/58 N 60 0 -40.0 9.2 36 -1270 E -5.9 145 5 7.0 11.0 a,t

CSDG-"LVO COMPLEX (GOZJ, JOTNIAN

GOZ-001 Nardlngra sandstone, S 62.9 la 6 21'2 N 50.8 -12.1 (24.6) -1300 a 10.9 146.9 (12.7 25.0) a D Magnusso” (19831

CO&002 Vaster-Norrland doltr>tes. S 62 9 18.3 *43/252 N 47.8 -45.5 2.6 71 1213-1270 d -7.5 156.5 2.1 3.3 a,t A P1p.x 11979b)

G02-003 Gnarp SlllS. s 62.1 17.3 *a/12 N 59.8 -47.7 6.4 1509 1213-1270 a ,= -12.7 146.4 (5.4' 8 3) a,t 8 Piper tl979b)

GO2-004 Gnarp dolente dyke. S 61.9 17.2 l/*6 N 45.8 -51 8 8.0 78 1245r20 d -11.0 159.0 7.0 10.0 a,t B Poorter (1976)

GO%005 Nordlngrl basic dykes (2), S 62.8 16.4 l9/9 N 32.1 -33.5 15.5 11 a 5.0 168.0 10.1 17.7 a,t C Frldh (1979). l

GOZ-006 Nordan& post-.Jatnlanovpr., S 62.9 18.6 l13/eo N 45.1 -39.4 4.3 93 -1250 d -2.3 157.4 31 5.2 a,t A Piper (19aOb)

GO2-007 Nordlngrd dolerltes, S 62.7 18.3 z/*12 N 45.6 -42 5 7.0 37 1245+20 d -5.0 158.0 5.0 9.0 a,t B Poorter (1976)

G02-008 Ulvo dolerite dykes, S 63.7 18.6 20/'20 N 50 4 -36.7 5.2 40 1215t20 d -4.0 153.0 4.0 6.0 a.t B Larson k Magnusso,,(1976)

GO2-Do9 Ulvo dolerlte dykes, S 63.5 18 2 32/'32 N 40.0 -35 8 7.9 11 12f5r20 * 10 161.0 5.0 9.0 a B Magpuseo" L Larson (1977)

G02-010 Nordu,& baked anorthoslte, S 62.9 18.6 '9/20 N 47.5 -32.1 7.5 39 -1245 a -1.6 153 9 5.0 a.0 a n Magnusson (1963) TABLE 2 @mind)

P Ho Rock unt and/or component.country LAT LON B/N/n P D I 1195 k age m PLAT PLON dp (A951 dm t R Ref.

CSDG-DALA COMPLEX (GO3). JOTNIAN

G03-WI Sarna dolarltes, S 61.0 13.0 5/Q? N 36.5 -33.1 4.4 301 1215-1290 d 53 158.6 2.8 A Piper & Smith (1980)

G03-002 Dala dolerltes, S 61.0 13.0 1/*5 N 85.0 -27.0 25.0 6 -1200 a -10.0 115.0 15.0 D Dyrel1us (19701

Go%co3 Lybergsgnupen dolerlte, S 60.8 13.7 5/*5 N 31.0 -42.0 10.0 62 a 1.3 165.7 75 C Mulder (1971)

Go3-004 Alvdalshscn dolerite ~111, S 61.4 13.8 11/*11 N 49.5 -37.6 5.3 74 1231t16 e 14 148.6 37 B Bylund (1985)

Go3-005 Mossi dolerite 8111. S 61.6 13.8 5/*5 N 45.3 -24.0 3s 1 6 1217?18 e 78 151.3 20.3 D Bylund (1965,

CSDG-JAMTLAND COMPLEX (G04). JOTNlAN

5/'5 N 40.2 G04-001 SWIdSJo dolerIte, S 63 0 15.1 -52.2 16.7 22 1156-1213 e -11 0 161.5 15.7 c Bylund (19851

G04-002 Urn&n doterlte. S 62.8 L6.0 1FU.18 N 51.4 -41.2 81 19 1179-1229 e -5.4 150 0 60

CSDG-DALA ANOMALOUS DYKES (G05), JOTNIAN-SUBJOTNIAN

GO5-Ml Eddalen dolerite sills, S 61.3 14.7 71’7 N 23 -2.7 15 7 16 1223:36 E 27 3 192 2 7.9

G05-DO2 ALvho dQ1Wlt.Z Sills. S 61.4 14.8 5/=5 N 23.6 -16.4 12.1 41 1215-1290 e 17 8 170 2 6.4

W5-003 BunKris dolcrlte. S 615 135 lo/*10 N 1.5 -8.7 3.3 218 1516-1546 e 24 I 141 9 17

W5-034 Bunkr%s dolerite. S 61.4 13.5 a/*4 N 340.0 -5.0 17.0 38 1516-1.546 e 24 3 215.5 8.5

GOS-005 GlYSJOn doh-lte, s 61.5 13.3 6/'6 N 11.1 16.9 8.2 66 a 35 4 171 4 4.4

G05-006 Glys~on dolerrte. S 61.5 13.8 5/'5 N 21.0 15.0 6.0 148 a 33.9 168.0 3.2 co5-007 Amh dolente. S 61 4 14.7 5/'5 N 28.0 4.0 7.0 138 a 27 1 163.0 3.5

EAST OF PROTOGINE ZONE iPOl), SVECONORWEGIAN

POl-001 Karlshamn dolerxte, S 56.0 IS.0 l/.9 R 130 0 81.0 4.8 116 871-936 e -43 2 213 5 89

PO1-002 Karlrhsnn hypsrlte dolerlte. S 56.2 14.9 I/“8 R 148 0 81.0 2.0 1182 871-936 e -40 0 207.0 40

POl-003 Y&y dolerite, S 56.0 15.0 l/.3 R 123.0 27.2 - 50 249.6

POl-004 irby dolerate, S 59.0 16.5 l/*6 R 142.5 52.5 7.0 93 995165 c -7 3 227.4 68

POl-005 Falun dalerite, S 60.5 15.5 i/*10 R 131.5 46 0 56 75 966=20 e -6 1 237 6 46

POl-006 T&roo dolcrlte, S 56 Li 15.0 1/*5 N 313 0 -42.0 4.8 255 871r21 e 03 237.0 3.6

PO1-007 Brakne-Hoby dolente. S 56.0 15.0 1/*7 N 309.0 4.0 6 I 99 8.30-975 e 22.0 252.11 3.1

WI-008 Fa_jodolerlte. $ 56.0 15.5 1/'6 N 313.0 3.0 5.4 155 924'26 h 23 3 248 9 27

PO1-009 Nllstorp dolerlte all, S 57.5 25.0 1,'6 N 315.0 -27 0 9.7 49 984+47 e 90 238 5 58

POL-010 "aby-Ronneby hyper,te dolerIte, S 56.2 15.2 1/'4 A 137.0 33 0 10.0 79 a 80 236.0 70

POI-011 EJen ao1erzte. S 607 142 1/'8 R 127 6 23 7 8.5 43 a h3 246 0 4.8

Pa-012 I(arsatter d&xlte. S 58.8 15 1 11'5 A 94.0 59 4 14.2 30 a -31 1 258.5 18.U

PO1-013 Nornas bolerite, s 61.5 13.2 4/'4 R 325 0 71.3 65 203 901-933 e 71 2 281.7 99

PDl-014 80 dyke , s 59.2 15.3 1/-g N 305 3 -40.9 13 7 15 a -4 0 244.0 1,)0

POl-015 Site 43 dolerzte, S 61 5 13.2 6/*6 N 04 82.2 3.1 459 401-933 e -76.8 195.7 59 TABLE 2 (continued) 2 2

NO 0 PLAT PLON dp tA951 dm t E Ref.

POE-IIOI 4.8 1 14 563-1565 d.e -51 7 2CiB.7 94 9.5 a,t

Paz-002 7.0 120 563-1585 d.e -45.0 213 6 13.1 13.6 a. t

PO2+X3 3.7 115 563-1565 d.e -49.1 7.1 7.3 a,?.

PC2-034 IO 338 -855 d -30.0 2.0 20 a,t

POZ-005 6.0 163 -871 d -20.2 6.0 8.0 e,t

PO2-006 7.0 1X? RVO-1573 d -27.0 216.0 3.3 4.0 a.i;

PO2-007 2.0 1892 -8R6 d -9 9 233.0 2.0 3.0 a,:

FO2-cJx 7.0 117 -900 d -1.9 241 $ 5.0 8., a,t

PO2-009 27 835-1573 d -19.0 213.3 (2Ei.l) a,t

PO2-010 886-900 d -5 9 240 3 (P8.d) o.t

WEST OF PROTOGINL %IINF (PCHI, SVECONORWEGIAN

PO3-001 31% 0 -58 0 38.0 12 842-945 a -13 3 218 ‘I 41 0 B

PO3-002 N 386.U -70 0 11.0 29 842-945 -37.3 231.8 16.0 c

PO3-003 292.0 -71.0 25 6 24 842-905 -31 0 225 9 39 0

PO%004 277.3 -73.2 7.5 174 944-977 -43.9 232.2 5-d A

PO3~005 233 ‘7 -84 3 75 81 944-977 -63.4 207 8 14.5

P03-006 N 270 a ~77.6 93 7P 944-977 -50.7 226.5 74

P03-007 kwd 9 -71 2 5.9 167 927-983 -56.0 252.4 9.0 C

PO3-c&I N 2'11.8 -^16.b 5.8 56 a -43 I 219.7 IO>i 8

PO3-009 N 294.9 -74 5 62 8* Y02t3D -39 6 211 d 10 2

PO3-010 N 267 0 .-71 5 '33 81 57 a -46 3 240.0 91 0

PO3-Oil N 3x.5 ""83 0 65 51 8 -46.3 197.4 12.4

PlJ3m012 N 306 7 -77.4 5.2 94 -dl L 212.5 ?I

PIIs"I.4 N 294.7 -40.7 1.d3 73 a -7 5 243 7 10 5

PO%014 N 298.0 -76.3 57 65 8d2-945 -40.9 215.4 3.7

Pas0t5 N 296 1 .-a08 5.8 71 &d..?-945 -47.6 210 6 10 7

PO3-016 N wi h -78 0 31 128 842-945 a -a3 5 215.3 6.0

PO3-017 N 283 0 -73.0 80 B&z-945 -41 8 229.3 1 i-0

PD3xI18 N 299.5 -78. t 2 0 842-945 -13.5 213 7 3.5

PO3-019 N 3s 9 -44 4 7s 042-945 -6 8 235.7 59

PO3-020 N 331.7 -42.5 84 30 215.0 6.0

PU3-021 N i!lh.1 -1n.a G3 IL%-1035 IO 0 246.0 3.4

TABLE 2 (continued)

NC. Rock unit and/or component,country LAT LON B/N/l? P D I I*95 age m PLAT PLON dp (A95) dm t g Ref.

LATE PRECAMBRIAN/CAMBRIAN (002)

00s091 Norway sparagm, tes, N 60.5 10 4 7/v M 191.0 21 0 24.0 600-700 a 18 0 179 0 13 3 25.3 - 0 Harland b Bidgood (1959)

90%002 Nexo sandstone, D 54.2 15 3 *14/n R 226 0 -30 0 IL.5 500-600 a 38.0 134 0 7.0 11 0 a,t.c A Prasad d Sharma (196Qa)

POZ-003 Fen carbonatlte complex, N 59.3 9 1 191'19 M 205 0 -56 0 30 530-600 e,d 63 0 142.0 3.1 4.7 a,t B Poorter (1972b)

QOP-004 Alno complex B, S 625 175 'E&9 N 348 4 75 8 11.1 545-589 d,f 84.7 299.7 18.8 20 4 a,t C P,per 11981). 9

QO2-CO5 Alno complex A (RI. S 62.5 17 5 '7146 R 291 4 70 15 2 545-589 d,f 12.9 269.3 7.7 15 3 a,?. 8 Piper (19811. l

QW-006 Alno complex A (Nl. S 62.5 17.5 +14/aa N 99.9 6.1 14 0 545-589 d,f I8 277.3 7 1 14.1 a,t B Plper (1981), *

002-007 B&tsfJord dykes. N 70.7 29.8 '6/34 N 84 5 60.6 4.4 -640 d 40.6 108.2 5.1 6.7 a,t B KJode (1980)

QO&OOB KongsfJord dykes. N 70.9 29. 6 31'3 N 90.0 70.0 I - 498 95 4 D KJode (19801. l

ORDOVICIAN (0031

90%001 Swedish lImestones. S 59.9 15.7 a 30.0 A6 0 33 3 8 a.t r Claesson (19781

903-002 SulltJelma gabbro IR), N 672 154 44%16 e 14.9 190.8 34 7 67.6 a 0 P1per 119741. f

903-003 Sul,t~elma gabbro (N), N 67.2 15.4 443r16 e 13.0 169.-4 26.3 51.3 a C Piper i19741. f

003-004 ha,! SUlltJ.Zh”a gabbro iC), Ii 67.2 15.4 443Z16 e 14.4 180 0 14.7 28.7 a C Plper (19741

QO3-005 Askoy pluton (Ail. N 607 56 444-474 c.f 25 0 233.0 5.0 10.0 a,t B Hother er al 11987)

QOO-001 Oslo ,gneous rocks (Al, N 59.7 10 4 - a24 d 21.2 169.2 4 1 85 f

004-002 Sat-vnappe dolerltes (A), S 62 6 12.9 5X-720 e.d 16 0 274 7 98 18.7 J

904-003 Saw nappe dolerItes (BJ. S 62 6 12.9 599-720 e,d 21 0 170 0 6.3 125 a

004-004 Roysng dyke [PC), S 626 129 599-720 d 15.9 176 5 6.7 12.7 a

004-005 Fen complex overprint, N 61.0 12.0 -370 e,d 20 0 160 0 - a,t

004-006 RIngerIke sandstone. N 600 100 a 21 0 159.0 t

004-007 Rlngerlkc sandstone (hb 1. N 600 100 _I - - - d.t

904-008 Gotland Follrngsbo limestone. S 575 195 3 21 0 164." 3.1 61 a

QO4-009 Gotland Dacker limestone S, 57 5 18.5 d 19 0 169 0 2.1 3

904-010 Gotland Medbys Ilmestone. S 57 5 18.5 a 23." 171 n 4.2 82 a

QO4-01t Scanla llmestone, S 55 5 lJ.5 il 22 0 16, 0 13.7 62 d

904-012 Fowen-tlyllitqsn gabbro (Pl), N 63.1 I1 6 a 11 2 226 7 44 Hi ‘l,t TABLE 2 (continued)

NO Rock unit and/or componest,country LAT LON B/N/n P 0 I II 95 k age m PLAT PLON dp (A951 dm t B Ref

DEVONIAN (QOS,

QQ5-CO1 Roragen sandstone. R 62.0 12.0 .8/8 210 0 9.0 15.0 n 19 0 160 0 7 6

005-002 HPstelnen sandstone (A), N 61 6 5.4 -/‘lO 210 0 18 0 9.0 d 16 0 L55.0 50

Qo5-003 HHstexnen sandstone (B), N 61.6 5.4 4.5 47.0 59.0 7.0 a 54.0 111.0 8.0

Qos-co4 Fongen-Hylllngen gabbro (P.21. N 63.1 11.6 .8/32 237.0 6.0 93 il 11.5 132.9 4.7

QO5-005 Kvaasheaten old red ST CR), N 61 4 5.6 a/*41 194.3 12.0 93 a 22.0 170.0 4.5

905-006 Kva~hesteo old red 55. (N). N 61.4 5 6 11‘2 12.0 330 - D 45.8 169 L

QOS-co7 Kvamshesttn old red 9s. N 61 4 5.4 -/f13 21.30 30 9.7 16 a 21 0 144 li 5.0

905-008 63.1 II.0 'Z/10 230.0 14 0 (8 5) 256-170 a,d 39.0 159.9 15.0

Qo5-009 N 61 8 5.3 l/.20/- 216.0 21 0 9.2 12

905-010 N 61.8 5.3 11+i4/- 322.0 54.1: 10.1 14

005-011 60.7 5 6 -/a35 25." -22.e 40 45

CARBONIFEROWS [QO61

QC6-001 Oslo xgneous rocks (31. N 597 104 R 203.5 -24.3 8.8 8 a 39.9 159 9 5.0

005-002 Ser.113alkaltne body (2). s 61 7 12 9 R 202.3 -24.4 8.8 41 e 38 1 166.4 3.9

906-003 Sarna alkaline body (1L, s 61 7 12.9 R 200.0 -22.4 1, 0 18 287S14 e 38.5 164 7 5.0

006-004 Mean Sarna body, S 61 7 12.9 R 201.1 -23.2 69 25 287=14 e 38.0 167 0 6.0

Qix-005 E-Vastergotland ~111. S 58.5 13 5 R 197.0 -2.0 40 467 287~15 d 31 0 174.0 2.0

PC+w Scsn~a dolerltes (A). S 55.5 13.5 R 190.0 -11.0 11.0 36 - 300 a 37.0 174 0 5.7

QO6-007 Stanza dolerltes (8). S 55 5 13 5 l13/106 R 199 5 -15 ii 65 42 -300 a 38 5 168.5 3.4 w6-cua Kragsrd dykes, N 589 95 .3/9 R 200 0 -41.4 15.8 62 d 52 1 158.4 11 8

Mm-009 Stabben sill (hh). ?I 63.3 a 5 -/i/*33 R *92.0 -12.0 24 297f8 2 32 1 174.4 1.0

Qo6-010 Stabber,~~11 (lb). II 63.3 8.5 -/I/'26 N 80 61.0 45 4 68 2 172 3 5.0

006-011 Oslo Graben lavas (hb). N 60.0 10 0 'A/- H 204.0 -34.0 - a - TABLE 2 (continued)

NO Rock unit and/or component,country LAT LON B/N/n P D I ,*95 k age m PLAT PLON dp (A95) dm t E Ref.

PERMIAN fQD7)

007-001 Scama melaphyres, S 55.5 13.5 *a/49 R I93 5 -38 0 11.0 23 250-285 d 54 0 171 5 7.7 13.0 a.t A Bylund (1974a)

QO7-002 Sunnhordland dykes (RI. N 60.5 4.7 -/'20 R 198.0 -27.0 58 - 160-275 d 43.0 162.0 - a.t B L0"ll.z(19811

QO7-003 Arendal dlabases (A). N 58.4 8.8 3/*4/14 R 200 2 -27.5 52 309 a 43.6 161.3 3 1 57 a.t C Halvorsen (19721, *

QO7-004 Arendal dlabases (61, N 58.4 8.8 l/*17/84 R 213 9 -39 5 8.9 75 a 46 6 140 2 6.4 10.7 a.t B Halvorsen (1972). l

QO7-005 Arendal dlabases (Cl, N 58.4 8.8 1/'17/84 R 207 9 -22.1 37 96 a 38.5 152.9 21 3 9 a,r B Halvorsen (19721. *

QO7-006 Arendal dlabases (Ol), N 58.4 8 8 i/*7/74 R 222 9 -35.2 74 67 a 40 2 131.6 49 8.5 a.t B Halvorsen (1972), l

QO7-007 Arondal dlabases (02). N 584 88 1/"12/53 R 209.5 -45 7 7.0 40 a 52 6 142.6 5.7 8 9 a,t 6 Haloorsen (19721, l

QO7-008 Oslo igneous rocks (I). N 59.7 10.4 '27127 R 203.6 -36.2 10 773 -270 d 38.6 160.7 10 1.2 3.t B "an Everdlngen (1960)

007-009 Ny-Hellesund dykes, N 58.0 7 8 l14/39 R 203 0 -18.9 2.9 284 X5-380 d 62 0 142.6 74 10 4 a,t A Halvorserl(1970)

QO7-010 GJerdlngen larvlklte, N 60 1 10.5 =ao/4o R 197.0 45.0 a 54 5 163 7 a C Krlstofferssen 11973). l

QO7-011 Bohuslan dykes (RPM). S 58.6 11 3 -/f16 R 196 0 -27 9 8.8 19 a 44 7 169 2 5.2 95 a B Thornrng I Abrahamsen (1980). *

007-012 Bohuslan dykes (RPC). S 58 6 11.3 -/a44 R 198.0 -32.7 3.6 37 a 47 2 155 6 23 4.1 a B Thornlng & Abrahamsen (1980). l

QO7-013 Menn Bohuslan dykes (RPI. S 58.6 11.3 *a/101 R L99 0 -31.8 66 72 a 46.4 164 5 4.2 74 a A Thorn,ng brAbrahamsen (1960). *

007-014 Bohuslan porphyry dykes \PDl, S 58.6 11 3 '3/Z R 190.0 -44.9 20.8 36 a 57.1 174.6 16.6 26.3 a B Thornlng 8 Abrahamsen (19801. *

907-015 Bohuslan dolerlte dykes (01, S 58.6 11.3 *5/20 A 198.0 -45.0 29.1 8 a 55.6 161 9 23.2 367 a B Thorn,ng 6 Abrahamsen (1980). '

QO7-016 Mean Bohuslan dykes (HP. PD. Dl. 5 58 6 11.3 *lb/155 R 197." -3.20 86 19 a 51 0 165.5 L2.7 a A Thornlng b Abrahamscn (1980). *

QO7-017 W-Vastergotland ~111. S 58 6 12.5 2/*33 R 202 0 -17 0 63 1596 2Ei2+50 d 38.0 166 0 6 5 a,t B Mulder (1971)

007-018 Brumunddal lavas, N 61.0 11 0 l9/- R 215 3 -50 8 5.7 83 a 52.6 136.8 70 a.t C Storetvedt 6. Petersen (1970). *

TRlASSIC IQOSJ

Qca-001 Oslo ,gneous rocks (III. N 59 7 10.4 9/*9 H 194.8 -48 0 64 65 a 57.7 165 7 a4 t c Sforetvedt et al (19781, *

00%002 Brumunddal laws (Rl. N 61.0 II 0 6/'8 R 209 5 -65.2 39 201 a 68 2 126 7 ' 5.0 a,t C Storetvedt b Petersen (1970). *

QOS-003 Brumunddal lavas (Nt. N 61 I, L1.C 6/.7 N 34.9 60 3 4 1 2 I 3 a 61 1 128.1 5 0 a,t C Sroretvedt & Petersen (1970). l

906-004 Brumunddal lavas (Cl. N 61.0 11 0 *14,- C 219 2 -t-42 177 - il 53 9 129 3 50 a,t C Staretvedt B Prterien (1970). * 200 C AT4LO(;IIF OF PALAEOMAGNETIC DIRECTIONS AND POLFS FROM FENNOSCANDIA 201

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