DOCSLIB.ORG

Lithosphere 2006

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Lithosphere 2006 i INSTITUTE OF SEISMOLOGY UNIVERSITY OF HELSINKI REPORT S-46 LITHOSPHERE 2006 FOURTH SYMPOSIUM ON THE STRUCTURE, COMPOSITION AND EVOLUTION OF THE LITHOSPHERE IN FINLAND PROGRAMME AND EXTENDED ABSTRACTS edited by Ilmo T. Kukkonen, Olav Eklund, Annakaisa Korja, Toivo Korja, Lauri J. Pesonen and Markku Poutanen Geological Survey of Finland Espoo, November 9-10, 2006 Helsinki 2006 ii Editor-in-Chief: Pekka Heikkinen Guest Editors: Ilmo T. Kukkonen, Olav Eklund, Annakaisa Korja, Toivo Korja, Lauri J. Pesonen, Markku Poutanen Publisher: Institute of Seismology P.O. Box 68 FIN-00014 University of Helsinki Finland Phone: +358-9-1911 (switchboard) Fax: +358-9-191 51626 http://www.seismo.helsinki.fi ISBN 952-10-2167-5 ISSN 0357-3060 Helsinki 2006 Helsinki University Press iii LITHOSPHERE 2006 FOURTH SYMPOSIUM ON THE STRUCTURE, COMPOSITION AND EVOLUTION OF THE LITHOSPHERE IN FINLAND PROGRAMME AND EXTENDED ABSTRACTS Geological Survey of Finland, Espoo, November 9-10, 2006 CONTRIBUTORS Finnish National Committee of the International Lithosphere Programme (ILP) Finnish Geodetic Institute Geological Survey of Finland Institute of Seismology, University of Helsinki Division of Geophysics, University of Helsinki Geophysics, Department of Physical Sciences, & Department of Geology, University of Oulu Sodankylä Geophysical Observatory, University of Oulu Department of Geology and Mineralogy, Åbo Akademi University Department of Geology, University of Turku ORGANIZING COMMITTEE AND EDITORS Olav Eklund Department of Geology 20014 University of Turku, Finland E-mail: [email protected] Annakaisa Korja Institute of Seismology P.O. Box 68, 00014 University of Helsinki, Finland E-mail:[email protected] Toivo Korja University of Oulu, Department of Physical Sciences, Geophysics, POB 3000, FIN-90014, University of Oulu Ilmo T. Kukkonen Geological Survey of Finland P.O. Box 96, 02151 Espoo, Finland E-mail: [email protected] Lauri J. Pesonen Division of Geophysics P.O. Box 64, 00014 University of Helsinki E-mail: [email protected] Markku Poutanen Finnish Geodetic Institute Geodeetinrinne 2, 02430 Masala, Finland E-mail: [email protected] iv References of Lithosphere Symposia Publications Pesonen, L.J., Korja, A. and Hjelt, S.-E., 2000 (Eds.). Lithosphere 2000 - A Symposium on the Structure, Composition and Evolution of the Lithosphere in Finland. Programme and Extended Abstracts, Espoo, Finland, October 4-5, 2000. Institute of Seismology, University of Helsinki, Report S-41, 192 pages. Lahtinen, R., Korja, A., Arhe, K., Eklund, O., Hjelt, S.-E. and Pesonen, L.J., 2002 (Eds.). Lithosphere 2002 – Second Symposium on the Structure, Composition and Evolution of the Lithosphere in Finland. Programme and Extended Abstracts, Espoo, Finland, November 12-13, 2002. Institute of Seismology, University of Helsinki, Report S-42, 146 pages. Ehlers, C., Korja A., Kruuna, A., Lahtinen, R., Pesonen, L.J. (Eds.), 2004. Lithosphere 2004 – Third Symposium on the Structure, Composition and Evolution of the Lithosphere in Finland. Programme and Extended Abstracts, Turku, Finland, November 10-11, 2004. Institute of Seismology, University of Helsinki, Report S-45, 131 pages. Kukkonen, I.T., Eklund, O., Korja, A., Korja, T., Pesonen, L.J. and Poutanen, M. (Eds.), 2006. Lithosphere 2006 – Fourth Symposium on the Structure, Composition and Evolution of the Lithosphere in Finland. Programme and Extended Abstracts, Espoo, Finland, November 9-10, 2006. Institute of Seismology, University of Helsinki, Report S-46, 233 pages. Keywords (GeoRef Thesaurus, AGI): lithosphere, crust, upper mantle, Fennoscandia, Finland, Precambrian, Baltic Shield, symposia v TABLE OF CONTENTS PREFACE ix PROGRAMME xi EXTENDED ABSTRACTS xv M. Bilker-Koivula. Global gravity field models from satellite measurements 1 A. Deutsch, L.J. Pesonen, S. Dayioglu. Impact cratering: its geological, 7 geological and economical role O. Eklund. The Magmatic end of the Svecofennian orogeny 11 T. Elbra, I. Lassila, E. Hæggström, L.J. Pesonen, I.T. Kukkonen and 15 P. Heikkinen. Ultrasonic seismic P- and S- velocities – the case of the Outokumpu deep drill core and FIRE profile samples. D.A.D. Evans. Evidence for pre-Pangea supercontinents, and the search 19 for accurate reconstructions P.-L. Forsström. Modelling the Eurasian Ice Sheet: focus on basal temperatures 25 and isostacy K. Hagelberg, P. Peltonen and T. Jokinen. Tyrisevä – an ultramafic 29 intrusion in Vammala Ni-belt: petrography, structure and ore potential P. Heikkinen, I.T. Kukkonen and FIRE Working Group. FIRE transects: 33 reflectivity of the crust in the Fennoscandian Shield M.J. Holma, V.J. Keinänen and I.M. Lahti. Structurally controlled gold 37 mineralisation in the lower part of the Kumpu Group, Lake Immeljärvi, Kittilä: Implications for late-orogenic crustal-scale deformation in Central Lapland T. Hyvönen, T. Tiira, A. Korja and K. Komminaho. Crustal tomography in 45 central Fennoscandian Shield T. Janik, E. Kozlovskaya, J. Yliniemi and FIRE Working Group. Crust-mantle 47 boundary in the central Fennoscandian shield: Constraints from wide-angle P- and S-wave velocity models and results of FIRE reflection profiles F. Karell. Magnetic fabric investigation on rapakivi granites in Finland 51 T. Kivisaari and P. Hölttä. Metamorphism of the Archean Tuntsa-Savukoski 57 area, NE-Finland: preliminary results H. Koivula, M.Tervo and M. Poutanen. Contemporary crustal motion in 59 Fennoscandia observed with continuous GPS networks T. Korja , P. Kaikkonen, I. Lahti, L.B. Pedersen, M. Smirnov, K. Vaittinen, 67 BEAR WG and EMTESZ WG. Electrical conductivity of upper mantle in Fennoscandia P. Kosunen, A. Korja, M. Nironen and FIRE Working Group. Post-collisional 71 extension in central Svecofennian, Central Finland vi E. Kozlovskaya, M. Poutanen and POLENET/FI colleagues. POLENET/FI - a 75 multidisciplinary geophysical experiment in Northern Fennoscandia and Antarctica during the International Polar Year 2007-2008 E. Kozlovskaya. Seismic studies of the upper mantle in the Fennoscandian Shield: 81 main results and perspectives for future research E. Kozlovskaya, G. Kosarev, I. Aleshin, J. Yliniemi, O. Riznichenko and I. Sanina. Composition of the crust and upper mantle derived from joint inversion 87 of receiver function and surface wave phase velocity of SVEKALAPKO teleseismic records I.T. Kukkonen and L.S. Lauri. Modelling the thermal evolution of a Precambrian 91 orogen: high heat production migmatitic granites of southern Finland Y. Kähkönen. Geochemistry of coherent andesites at Palvajärvi, Paleoproterozoic 97 Tampere Belt, southern Finland: evidence for alteration, petrogenesis and tectonic setting R. Lahtinen, A. Korja and M. Nironen. Continent formation: the Fennoscandian 103 perspective L.S. Lauri, M. Cuney, O.T. Rämö, M. Brouand and R. Lahtinen. Petrology of 107 the Svecofennian late orogenic granites with emphasis on the distribution of uranium L.S. Lauri, T. Andersen, P. Hölttä, H. Huhma and S. Graham. Neoarchean 113 growth of the Karelian craton: New evidence from U–Pb and Lu–Hf isotopes in zircons A.V. Luttinen, V.Lobaev, O.T. Rämö, M. Cuney, B.G.J. Upton, V. Lindqvist. 119 Geochemistry of basalt dykes and lavas from Inkoo and Lake Ladoga: Widespread 1.53–1.46 Ga high-Ti and-Zr magmatism in southern Fennoscandian Shield? M. Nironen and A. Korja. FIRE 2 & 2A profile: interpretation and correlation to 125 surface geology K. Moisio and J. Mäkinen. Rheology of the lithosphere and models of postglacial 129 rebound H. O´Brien, P. Peltonen, M. Lehtonen and D. Zozulya . Mantle stratigraphy of 137 the Karelian craton: a 620 km long 3-D cross section revealed by mantle-derived xenocryst chemistry M. Pajunen, M.-L.Airo, T. Elminen, I. Mänttäri, M.Vaarma, P. Wasenius and 141 M. Wennerström. Tectonic and magmatic evolution of the Svecofennian crust in southern Finland N. L. Patison, V.J. Ojala, A. Korja, V. Nykänen & the FIRE Working Group. 149 Gold exploration and the crustal structure of northern Finland as interpreted from FIRE seismic reflection profiles 4, 4A & 4B vii M. Poutanen and the National ILP Committee of Finland. Upper mantle 155 dynamics and Quaternary climate in cratonic areas; a proposal for an ILP Project T. Ruotoistenmäki. Classification of Finnish bedrock sub-areas using 157 lithogeochemical analysis of Finnish plutonites H. E. Ruotsalainen, S. Hietala, S. Dayioglu, J. Moilanen, L. J. Pesonen and 163 M. Poutanen. Keurusselkä impact structure – preliminary geophysical investigations J. Salminen and L.J. Pesonen. Paleomagnetic and Petrophysical Investigation of 169 the Mesoproterozoic monzodioritic sill, Valaam, Russian Karelia H. Silvennoinen and E. Kozlovskaya. 3-D structure and physical properties of the 173 Kuhmo Greenstone Belt (eastern Finland): constraints from gravity modelling and seismic data and implications for the tectonic setting T. Siren and I.T. Kukkonen. Three-dimensional visualization of FIRE seismic 179 reflection sections P. Sorjonen-Ward. Orogenic processes and mineralization through time – some 181 general concepts and comparisons with FIRE 3 and 3A reflection seismic interpretation P. Sorjonen-Ward, A. Ord, Y. Zhang, P. Alt-Epping, T. Cudahy, A. Kontinen 187 and U. Kuronen. Numerical simulations of geological processes relating to the Outokumpu mineral system T. Stålfors, C. Ehlers and A. Johnson. The granite-migmatite zone of southern 193 Finland – a history of structural control and intrusions K. Sundblad, M. Beckholmen, O. Nilsen and T. Andersen. Palaeozoic 199 metallogeny of Røros (Norway); a tool
Load more

Recommended publications
  • AND GEOLOGY of the SURROUNDING AREA I
    . " ... , - .: ~... GP3/10 ~ " . :6',;, J .~~- -i-~ .. '~ MANITOBA MINES BRANCH DEPARTMENT OF MfNES AND NATURAL RESOURCES LAKE ST. MARTIN CRYPTO~EXPLOSION CRATER .. AND GEOLOGY OF THE SURROUNDING AREA i . , - by H. R. McCabe and B. B. Bannatyne Geological Paper 3/70 Winnipeg 1970 Electronic Capture, 2011 The PDF file from which this document was printed was generated by scanning an original copy of the publication. Because the capture method used was 'Searchable Image (Exact)', it was not possible to proofread the resulting file to remove errors resulting from the capture process. Users should therefore verify critical information in an original copy of the publication. (i) GP3/10 MANITOBA M]NES BRANCH DEPARTMENT OF MINES AND NATURAL RESOURCES LAKE ST. MARTIN CRYPTO·EXPLOSION CRATER AND GEOLOGY OF THE SURROUNDING AREA by H. R. McCabe and B. B. Bannatync • Geological Paper 3/70 Winnipeg 1970 (ii) TABLE OF CONTENTS Page Introduction' r Previous work I .. Present work 2 Purpose 4 Acknowledgcmcnts 4 Part A - Regional geology and structural setting 4 Post-Silurian paleogeography 10 Post-crater structure 11 Uthology 11 Precambrian rocks 12 Winnipeg Fomlation 13 Red River Fomlation 14 Stony Mountain Formation 15 Gunn Member 15 Gunton Member 16 Stoncwall Formation 16 Interlake Group 16 Summary 17 Part B - Lake St. Martin crypto-explosion crater 33 St. Martin series 33 Shock metamorphism 33 Quartz 33 Feldspar 35 Biotite 35 Amphibole 36 Pseudotachylyte 36 Altered gneiss 37 Carbonate breccias 41 Polymict breccias 43 Aphanitic igneous rocks - trachyandcsitc 47 Post·crater Red Beds and Evaporites (Amaranth Formation?) 50 Red Bed Member 50 Evaporite Member 52 Age of Red Bed·Evaporite sequence 53 Selected References 67 .
    [Show full text]
  • Mid/Late Devonian-Carboniferous Collapse Basins on the Finnmark Platform and in the Southwesternmost Nordkapp Basin, SW Barents Sea
    Solid Earth Discuss., https://doi.org/10.5194/se-2017-124 Manuscript under review for journal Solid Earth Discussion started: 7 November 2017 c Author(s) 2017. CC BY 4.0 License. Mid/Late Devonian-Carboniferous collapse basins on the Finnmark Platform and in the southwesternmost Nordkapp basin, SW Barents Sea 5 Jean-Baptiste Koehl1,2, Steffen G. Bergh1,2, Tormod Henningsen1, Jan-Inge Faleide2,3 1Department of Geosciences, University of Tromsø, N-9037 Tromsø, Norway. 2Research Centre for Arctic Petroleum Exploration (ARCEx), University of Tromsø, N-9037 Tromsø, Norway. 3Department of Geosciences, University of Oslo, P.O. Box 1047 Blindern, NO-0316 Oslo, Norway. Correspondence to: Jean-Baptiste Koehl ([email protected]) 10 Abstract. The SW Barents Sea margin experienced a pulse of extensional deformation in the Middle-Late Devonian through the Carboniferous, after the Caledonian Orogeny terminated. These events marked the initial stages of formation of major offshore basins such as the Hammerfest and Nordkapp basins. We mapped and analyzed three major fault complexes, i) the Måsøy Fault 15 Complex, ii) the Rolvsøya fault, iii) the Troms-Finnmark Fault Complex. We discuss the formation of the Måsøy Fault Complex as a possible extensional splay of an overall NE-SW trending, NW- dipping, basement-seated Caledonian shear zone, the Sørøya-Ingøya shear zone, which was partly inverted during the collapse of the Caledonides and accommodated top-to-the-NW normal displacement in Mid/Late Devonian-Carboniferous times. The Troms-Finnmark Fault Complex 20 displays a zigzag-shaped pattern of NNE-SSW and ENE-WSW trending extensional faults before it terminates to the north as a WNW-ESE trending, NE-dipping normal fault that separates the southwesternmost Nordkapp basin in the northeast from the Finnmark Platform west and the Gjesvær Low in the southwest.
    [Show full text]
  • NGU Norges Geologiske Undersøkelse Geolological Survey of Norway
    NGU Norges geologiske undersøkelse Geolological Survey of Norway Bulletin 440 MISCELLANEOUS RESEARCH PAPERS Trondheim 2002 Printed in Norway by Grytting AS Contents Timing of late- to post-tectonic Sveconorwegian granitic magmatism in South Norway .............................................................................................. 5 TOM ANDERSEN, ARILD ANDRESEN & ARTHUR G. SYLVESTER Age and petrogenesis of the Tinn granite,Telemark, South Norway, and its geochemical relationship to metarhyolite of the Rjukan Group ............................. 19 TOM ANDERSEN, ARTHUR G. SYLVESTER & ARILD ANDRESEN Devonian ages from 40Ar/39Ar dating of plagioclase in dolerite dykes, eastern Varanger Peninsula, North Norway ......................................................................... 27 PHILIP G. GUISE / DAVID ROBERTS Mid and Late Weichselian, ice-sheet fluctuations northwest of the Svartisen glacier, Nordland, northern Norway ................................................................................. 39 LARS OLSEN Instructions to authors – NGU Bulletin .................................................................... xx TOM ANDERSEN,ARILD ANDRESEN & ARTHUR G.SYLVESTER NGU-BULL 440, 2002 - PAGE 5 Timing of late- to post-tectonic Sveconorwegian granitic magmatism in South Norway TOM ANDERSEN, ARILD ANDRESEN & ARTHUR G. SYLVESTER Andersen, T., Andresen, A. & Sylvester, A.G. 2002: Timing of late- to post-tectonic Sveconorwegian granitic magma- tism in South Norway. Norges geologiske undersøkelse Bulletin 440, 5-18. Dating of late- to post-tectonic Sveconorwegian granitic intrusions from South Norway by the SIMS U-Pb method on zircons and by internal Pb-Pb isochrons on rock-forming minerals indicates a major event of granitic magmatism all across southern Norway in the period 950 to 920 Ma. This magmatic event included emplacement of mantle- derived magma into the source region of granitic magmas in the lower crust east of the Mandal-Ustaoset shear zone, and formation of hybrid magmas containing crustal and mantle-derived components.
    [Show full text]
  • Tectonic Regimes in the Baltic Shield During the Last 1200 Ma • a Review
    Tectonic regimes in the Baltic Shield during the last 1200 Ma • A review Sven Åke Larsson ' ', Bva-L^na Tuliborq- 1 Department of Geology Chalmers University of Technology/Göteborij U^vjrsivy 2 Terralogica AB November 1993 TECTONIC REGIMES IN THE BALTIC SHIELD DURING THE LAST 1200 Ma - A REVIEW Sven Åke Larsson12, Eva-Lena Tullborg2 1 Department of Geology, Chalmers University of Technology/Göteborg University 2 Terralogica AB November 1993 This report concerns a study which was conducted for SKB. The conclusions and viewpoints presented in the report are those of the author(s) and do not necessarily coincide with those of the client. Information on SKB technical reports from 1977-1978 (TR 121), 1979 (TR 79-28), 1980 (TR 80-26), 1981 (TR 81-17), 1982 (TR 82-28), 1983 (TR 83-77), 1984 (TR 85-01), 1985 (TR 85-20), 1986 (TR 86-31), 1987 (TR 87-33), 1988 (TR 88-32),. 1989 (TR 89-40), 1990 (TR 90-46), 1991 (TR 91-64) and 1992 (TR 92-46) is available through SKB. ) TECTONIC REGIMES IN THE BALTIC SHIELD DURING THE LAST 1200 Ma - A REVIEW by Sven Åke Larson and Eva-Lena Tullborg Department of Geology, Chalmers University of Technology / Göteborg University & Terralogica AB Gråbo, November, 1993 Keywords: Baltic shield, Tectonicregimes. Upper Protero/.oic, Phanerozoic, Mag- matism. Sedimentation. Erosion. Metamorphism, Continental drift. Stress regimes. , ABSTRACT 1 his report is a review about tectonic regimes in the Baltic (Fennoscandian) Shield from the Sveeonorwegian (1.2 Ga ago) to the present. It also covers what is known about palaeostress during this period, which was chosen to include both orogenic and anorogenic events.
    [Show full text]
  • The Tennessee Meteorite Impact Sites and Changing Perspectives on Impact Cratering
    UNIVERSITY OF SOUTHERN QUEENSLAND THE TENNESSEE METEORITE IMPACT SITES AND CHANGING PERSPECTIVES ON IMPACT CRATERING A dissertation submitted by Janaruth Harling Ford B.A. Cum Laude (Vanderbilt University), M. Astron. (University of Western Sydney) For the award of Doctor of Philosophy 2015 ABSTRACT Terrestrial impact structures offer astronomers and geologists opportunities to study the impact cratering process. Tennessee has four structures of interest. Information gained over the last century and a half concerning these sites is scattered throughout astronomical, geological and other specialized scientific journals, books, and literature, some of which are elusive. Gathering and compiling this widely- spread information into one historical document benefits the scientific community in general. The Wells Creek Structure is a proven impact site, and has been referred to as the ‘syntype’ cryptoexplosion structure for the United State. It was the first impact structure in the United States in which shatter cones were identified and was probably the subject of the first detailed geological report on a cryptoexplosive structure in the United States. The Wells Creek Structure displays bilateral symmetry, and three smaller ‘craters’ lie to the north of the main Wells Creek structure along its axis of symmetry. The question remains as to whether or not these structures have a common origin with the Wells Creek structure. The Flynn Creek Structure, another proven impact site, was first mentioned as a site of disturbance in Safford’s 1869 report on the geology of Tennessee. It has been noted as the terrestrial feature that bears the closest resemblance to a typical lunar crater, even though it is the probable result of a shallow marine impact.
    [Show full text]
  • Do Faults Preserve a Record of Seismic Slip: a Second Opinion
    Journal of Structural Geology 78 (2015) 1e26 Contents lists available at ScienceDirect Journal of Structural Geology journal homepage: www.elsevier.com/locate/jsg Review article Do faults preserve a record of seismic slip: A second opinion * Christie D. Rowe a, , W. Ashley Griffith b a Department of Earth & Planetary Sciences, McGill University, 3450 University St., Montreal, QC H3A 0E8, Canada b Department of Earth and Environmental Sciences, University of Texas at Arlington, Box 19049, Arlington, TX 76019, USA article info abstract Article history: Exhumed fault zones offer insights into deformation processes associated with earthquakes in unpar- Received 31 January 2015 alleled spatial resolution; however it can be difficult to differentiate seismic slip from slow or aseismic Received in revised form slip based on evidence in the rock record. Fifteen years ago, Cowan (1999) defined the attributes of 5 June 2015 earthquake slip that might be preserved in the rock record, and he identified pseudotachylyte as the only Accepted 9 June 2015 reliable indicator of past earthquakes found in ancient faults. This assertion was based on models of Available online 12 June 2015 frictional heat production (Sibson, 1975, 1986) providing evidence for fast slip. Significant progress in fault rock studies has revealed a range of reaction products which can be used to detect frictional heating Keywords: Fault rocks at peak temperatures less than the melt temperature of the rock. In addition, features formed under Paleoseismology extreme transient stress conditions associated with the propagating tip of an earthquake rupture can Pseudotachylyte now be recognized in the rock record, and are also uniquely seismic.
    [Show full text]
  • Thermochronology and Exhumation History of The
    Thermochronology and Exhumation History of the Northeastern Fennoscandian Shield Since 1.9 Ga: Evidence From 40 Ar/ 39 Ar and Apatite Fission Track Data From the Kola Peninsula Item Type Article Authors Veselovskiy, Roman V.; Thomson, Stuart N.; Arzamastsev, Andrey A.; Botsyun, Svetlana; Travin, Aleksey V.; Yudin, Denis S.; Samsonov, Alexander V.; Stepanova, Alexandra V. Citation Veselovskiy, R. V., Thomson, S. N., Arzamastsev, A. A., Botsyun, S., Travin, A. V., Yudin, D. S., et al. (2019). Thermochronology and exhumation history of the northeastern Fennoscandian Shield since 1.9 Ga:evidence from 40Ar/39Ar and apatite fission track data from the Kola Peninsula. Tectonics, 38, 2317–2337.https:// doi.org/10.1029/2018TC005250 DOI 10.1029/2018tc005250 Publisher AMER GEOPHYSICAL UNION Journal TECTONICS Rights Copyright © 2019. American Geophysical Union. All Rights Reserved. Download date 01/10/2021 04:51:21 Item License http://rightsstatements.org/vocab/InC/1.0/ Version Final published version Link to Item http://hdl.handle.net/10150/634481 RESEARCH ARTICLE Thermochronology and Exhumation History of the 10.1029/2018TC005250 Northeastern Fennoscandian Shield Since 1.9 Ga: Key Points: 40 39 • Since 1.9 Ga, the NE Fennoscandia Evidence From Ar/ Ar and Apatite Fission was characterized by a slow exhumation (1‐2 m/Myr) Track Data From the Kola Peninsula • Total denudation of the NE Roman V. Veselovskiy1,2 , Stuart N. Thomson3 , Andrey A. Arzamastsev4,5 , Fennoscandia since 1.9 Ga did not 6 7,8 7,8 9 exceed ~3‐5km Svetlana Botsyun , Aleksey V. Travin , Denis S. Yudin , Alexander V. Samsonov , • The Kola part of Fennoscandia and Alexandra V.
    [Show full text]
  • Finnish Lithosphere Meeting
    INSTITUTE OF SEISMOLOGY UNIVERSITY OF HELSINKI REPORT S-65 LITHOSPHERE 2016 NINTH SYMPOSIUM ON THE STRUCTURE, COMPOSITION AND EVOLUTION OF THE LITHOSPHERE IN FENNOSCANDIA Geological Survey of Finland, Espoo, November 9-11, 2016 PROGRAMME AND EXTENDED ABSTRACTS edited by Ilmo Kukkonen, Suvi Heinonen, Kati Oinonen, Katriina Arhe, Olav Eklund, Fredrik Karell, Elena Kozlovskaya, Arto Luttinen, Raimo Lahtinen, Juha Lunkka, Vesa Nykänen, Markku Poutanen, Eija Tanskanen and Timo Tiira Helsinki 2016 INSTITUTE OF SEISMOLOGY UNIVERSITY OF HELSINKI REPORT S-65 LITHOSPHERE 2016 NINTH SYMPOSIUM ON STRUCTURE, COMPOSITION AND EVOLUTION OF THE LITHOSPHERE IN FENNOSCANDIA PROGRAMME AND EXTENDED ABSTRACTS Edited by Ilmo Kukkonen, Suvi Heinonen, Kati Oinonen, Katriina Arhe, Olav Eklund, Fredrik Karell, Elena Kozlovskaya, Arto Luttinen, Raimo Lahtinen, Juha Lunkka, Vesa Nykänen, Markku Poutanen, Eija Tanskanen and Timo Tiira Geological Survey of Finland, Espoo, November 9-11, 2016 Helsinki 2016 Series Editor-in-Chief: Annakaisa Korja Guest Editors: Ilmo Kukkonen, Suvi Heinonen, Kati Oinonen, Katriina Arhe, Olav Eklund, Fredrik Karell, Elena Kozlovskaya, Arto Luttinen, Raimo Lahtinen, Juha Lunkka, Vesa Nykänen, Markku Poutanen, Eija Tanskanen and Timo Tiira Publisher: Institute of Seismology P.O. Box 68 FI-00014 University of Helsinki Finland Phone: +358-294-1911 (switchboard) http://www.helsinki.fi/geo/seismo/ ISSN 0357-3060 ISBN 978-952-10-5081-7 (Paperback) Helsinki University Print Helsinki 2016 ISBN 978-952-10-9282-5 (PDF) i LITHOSPHERE 2016 NINTH SYMPOSIUM
    [Show full text]
  • RESEARCH Paleoproterozoic High-Pressure Metamorphic History
    RESEARCH Paleoproterozoic high-pressure metamorphic history of the Salma eclogite on the Kola Peninsula, Russia Takeshi Imayama1, Chang-Whan Oh2, Shauket K. Baltybaev3, Chan-Soo Park4, Keewook Yi4, and Haemyeong Jung5 1RESEARCH INSTITUTE OF NATURAL SCIENCES, OKAYAMA UNIVERSITY OF SCIENCE, 1-1 RIDAI-CHO, KITA-KU, OKAYAMA 7000005, JAPAN 2DEPARTMENT OF EARTH AND ENVIRONMENTAL SCIENCES, AND EARTH AND ENVIRONMENTAL SCIENCE SYSTEM RESEARCH CENTER, CHONBUK NATIONAL UNIVERSITY, 567 BACKJAEDARO, DUCKJIN-GU, JEONJU 54896, REPUBLIC OF KOREA 3INSTITUTE OF PRECAMBRIAN GEOLOGY AND GEOCHRONOLOGY, RUSSIAN ACADEMY OF SCIENCES, 2, MAKAROVA, ST. PETERSBURG, 199034, RUSSIA 4DIVISION OF EARTH AND ENVIRONMENTAL SCIENCE RESEARCH, KOREA BASIC SCIENCE INSTITUTE, 161, YEONGUDANJI, OCHANG-EUP, CHEONGWON-GU, CHEONGJU, 28119, OCHANG 34133, REPUBLIC OF KOREA 5SCHOOL OF EARTH AND ENVIRONMENTAL SCIENCES, SEOUL NATIONAL UNIVERSITY, 1 GWANAK-RO, GWANAK-GU, SEOUL 08826, REPUBLIC OF KOREA ABSTRACT The Precambrian Salma eclogites on the Kola Peninsula, Russia, represent some of the oldest eclogites in the world; however, there has been much debate regarding whether the timing of their eclogite facies metamorphism is Archean (2.72–2.70 Ga) or Paleoproterozoic (1.92–1.88 Ga). New microstructural observations, pressure-temperature (P-T ) analyses, zircon inclusion analyses, and U-Pb zircon dating performed in this study suggest that eclogite facies metamorphism occurred at ca. 1.87 Ga under P-T conditions of 16–18 kbar and 750–770 °C. Metamorphic zircons with the age of 1.87 Ga have inclusions of garnet (Grt) + omphacite (Omp) + Ca-clinopyoxene (Cpx) + amphibole (Amp) + quartz (Qz) + rutile (Rt) ± biotite (Bt), as well as flat heavy rare earth element (HREE) patterns due to the presence of abundant amounts of garnet during peak eclogite facies metamorphism.
    [Show full text]
  • The Origin of Hydrocarbon Gases in the Lovozero Nepheline-Syenite Massif (Kola Peninsula, NW Russia), As Revealed from He and Ar Isotope Evidence
    minerals Article The Origin of Hydrocarbon Gases in the Lovozero Nepheline-Syenite Massif (Kola Peninsula, NW Russia), as Revealed from He and Ar Isotope Evidence Valentin Nivin Geological Institute, Kola Science Centre, Russian Academy of Sciences, 14 Fersman St., 184209 Apatity, Russia; [email protected]; Tel.: +7-815-55-79-580 Received: 15 August 2020; Accepted: 16 September 2020; Published: 21 September 2020 Abstract: The occurrence of hydrocarbon gases (HCG) in unusually high concentrations for magmatic complexes, in the Lovozero and some other alkaline massifs, is of both geochemical and practical interest. The nature of these gases, despite the long history of research, remains the subject of debate. As an approach to solving this problem, we studied the coupled distribution of occluded HCG and the recognized tracers of various geological processes, such as helium and argon isotopes. The extraction of the gas components trapped in fluid micro-inclusions was carried out by the mechanical crushing 3 4 of rock and mineral samples. A positive correlation was found between the He/ He and CH4/C2H6 ratios, whereas a negative correlation of the latter was found with the 36Ar concentration, which in turn was directly related, in varying degrees, to the content of HCG and most strongly with pentanes. Conjugacy of the processes of the heavier gaseous hydrocarbons, a loss of the deep component of the fluid phase and dilution of it with the atmogenic component was established. In the absence of a 3 3 correlation between CH4 and He, the value of the CH4/ He ratio in the Lovozero gas substantially exceeded the estimates of it in gases of a mantle origin, and mainly corresponded to the crustal values.
    [Show full text]
  • Paper IV.Pdf (5.305Mb)
    Svecofennian shear zone networks of the Rombak Tectonic Window, North Norway: Structural architecture and regional correlation with the Fennoscandian shield Tine L. Angvik1 and 2, Iain H.C. Henderson1 and Steffen G.Bergh2 1. The Geological Survey of Norway 2. University of Tromsø Abstract The northern part of the Fennoscandian shield comprises several domains of Archean to Paleoproterozoic age. These domains include the Kola province in Russia, the Kola-Lapland and Kittilä provinces farther west, and the Norrbotten province in northern Sweden. The evolution of these domains was extremely complex and involved continental break ups, development of micro continents, island arcs and later closing of oceans (Kola ocean) accompanied by subduction, accretion and continent-continent collision. The Archean and Paleoproterozoic crust is commonly juvenile and the Fennoscandian shield has a high potential for mineral and ore deposits. Archean and Paleoproterozoic basement rocks are also present as inliers and outliers beneath and west of the Scandinavian Caledonides, and these provinces in general, have not been included in previous regional studies of the Fennoscandian Shield. Because of new knowledge of the stratigraphy, composition, age, structural relationship, and widespread sulphide mineralisation in the Rombak Tectonic Window and the similarities of these rocks with provinces farther north (inliers) and east, we consider them to be directly correlated with the basement rocks in northern Sweden, Norway and Finland. These provinces all show evidence of the same break-up activity in the Archean (2.5-1.9 Ga) that formed one or several micro continents filled in with Paleoproterozoic basin sediments and the development of island arcs and back arc basins and volcano-sedimentary deposits, terminating with the Svecofennian orogeny (1.92-1.79 Ga) which produced fold-thrust belts and regional ductile shear zones.
    [Show full text]
  • Impact Melt Rocks in the "Cretaceous
    Large Meteorite Impacts (2003) alpha_t-z.pdf Contents — T through Z Locations and Compositions of Mare Ponds in South Pole-Aitken Basin on the Moon and Its Implication to the Impact Tectonics T. Takata and S. Hori ............................................................................................................................. 4058 New Laboratory Results on Field Sections at the Impact Crater of Araguainha (MT, GO, Brazil). Area of Proximal and Distal Impact Ejecta, Including Microspherules Dated from the End of Permian J. M. Théry, A. Crosta, E. Veto Akos, E. Bilal, K. Gal-Solymos, and E. Dransart................................. 4096 Techniques of Shock Wave Experiments and Determination of Hugoniot Data of Solids K. Thoma................................................................................................................................................ 4134 Differential Stress-controlled Deformation of Quartz During and After Hypervelocity Impact — Microstructural Evidence from the Charlevoix Impact Structure, Quebéc, Canada C. A. Trepmann and J. G. Spray............................................................................................................. 4026 Mjølnir Marine Crater Resulting from Oblique Impact: Compelling Evidence F. Tsikalas and J. I. Faleide................................................................................................................... 4005 A New Mid- to Late-Maastrichtian Impact in the Raton Basin 100m Below the K/T Boundary P. Turner, S. C. Sherlock, P. Clarke, and
    [Show full text]