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Vulkansk I Kvænangen Bergvesenet Postboks 3021. 7002 Trondheim Rapportarkivet Bergvesenet rapport nr Intern Journal nr Internt arkiv nr Rapport lokalisering Gradering BV2232 Fortrolig Kommer fra ..arkiv , Ekstern rapport nr Oversendt fra Fortrolig pga Fortrolig fra dato: Sulitjelma Bergverk AJS "522300002" Tittel Geologyof the Alta Kvenangen window(Kvaenangen side). Forfatter Dato Bedrift GAUTIER A. 1975 . Sulitjelrna Gruber AJS Kommune ' Fylke Bergdistrikt 1: 50 000 kartblad 1:250 000 kartblad Fagområde Dokument type Forekomster Råstofftype Emneord Sammendrag Geologiske undersokelse av Alta - Kvenangen vinduet i Nordtroms og Vestfinnmark. Generell skildring av berggrunnen, detaljerte petrografiske beskrivelser av de forskjellige bergartene i grunnfjellet og Raipas -dekket. Metamorfose, geokjemi og geokronologi gnmdig diskutert. Mulighetene for mineraliseringer vurderes som sma. Del av doktorarbeide. Skyvedekke. Tektonikk. fift Sulitjelftn 6nehr tnp Sta /TiFin Mese No. ( 61-01067 o TRE 817.fieAW9N6Fir WINDOW (ktesnemfes slå) N-Neir ved Wefinmark ,/4wo, Perad mamins 4 Afe ibat* ømmoto FWIwyk: svaner snol tWS iffwkf 11, , liencif e'r uffiwn Snarra et miandogir tt 4.1.41emminI n n VNrtrid, å thitht 13 r.des Itretehers NofremkrInt swinevr SpIre4 Sve/t Awderlosd • No.. 10 0 21 A/S SULITJELMA GRUBER N - 8230 SULITJELMA NORGE GEOLOGY OF THE ALTA - KVAENANGEN WINDOW (Kvae nangen side ) N - Troma and W-Finnmark, Norwa Regional mapping to the scale 1/ 50.000 Field work : summer 1974 and 1975 • André M. Gautier Licencib és sciences gbologiques et mintaalogiques (at B. Sc. ) UniversitE de Genbve/Dept.Min‘ralogie 13, rue des Maratchers CH - 1211 GENEVE 4 Sveits - Switzerland November 1975 2 Content papae CH. IINTRODUCTION 1. 1. Location I fl 1. 1. 2. Topography I c 1. 1. 3. Outcrops IC 1. 1. 4. Climate I 1. 2. Geology I G 1. 2. 1. General Geology I 6 1.2.2. Previous work IJ 1. 3. Old Mining Area I L. 1. 4. Survey: why and how I L- 1. 4. 1. Geological motives I L 1. 4. 2. Field work Iti CH.IIPETROGRAPHY 2. 1. Upper units II 9 2. 1. 1. Allochthonous II I? 2. 1. 2. Autochthonous H fl 2. 2. Basement II g 2. 2. 1. Subgroup of Upper Raipas H 8 2. 2. 1. 1. Dolomite interbedded w. sand- stones and shales II 8 2. 2. 1. 2. Greywacke II D 2. 2. 2. Subgroup of Lower Raipas II D 2.2.2. 1. Argillite ll p 2.2.2.2. Black Sqldsts II£ 2. 2. 2. 3. Carbonate rocks II F 2. 2. 2. 4. Basaltic tuffs, tuffites and tuffo- genic sediments II6 2. 2. 2. 5. Basaltic tuffs w. dolomite lenses ll if 2. 2. 2. 6. Greenstones: Introduction H fl 2 1,fVf fiC44 : : f-HT1'1.7 ...)!1tc•-•1•14f>11 - ./7 E 't• " 7/.: 3 7.27 tTei UQ JL1E7. › r•stc- ( 'I" • T. ' •Z: 21 -21): •i• - 21.!' E! III I C1 ,P• I i'''-.1(•-; / irs•' `.1 f11 I .1 LI- Content Page CH. IV TECTONIC 4.1. Polarity IV fi 4.2. Tectonic style IV /9 4.3. Tectonic map: explanation IV 8 CH. V LOCAL DESCRIPTION 5. 1. Middavarre CH. VI ECONOMIC GEOLOGY VI CH. VII DISCUSSION 7.1. About the thickness of the series VI I) 7.2. About the sedirnentation conditions and their relation w. tuffs/tuffites etc. VII 8 7.3. About a patticular pillow layer(marker) VII 7. 4. About the extension and the volcanic vent of the lava stream VII 7.5. About the limit between Lower and Upper Raipas VII 7.6. Comparison of the Lower Raipas with a type scheme for the"greenstones belt" VII H CI4.VIU FURTHER WORK VIII CH. IX CONCLUSIONS Ix CH. X 10.1. Bibliography (references) X f/ 10.2. Maps and air photos X F 10.2.1. Maps NGO X F 10.2.2. Air photos X F 10.3. Equipment list X G 10.321. Office work and drawing X 6 10.3.2. Field work X H 10.3.3. Camping and bivouac X h s- Cll. XI MISCEL LA.ECUS XI • • • • • (:5.11 s 1 :at 7") „ 45 ' I , and iy pa.rt1 iuth Ke .u- titirald (.s - li ans) and partl in (1- , t.:cj, c •::::: pt 1.11:Lc tal z ne. '-: ::-..i :.3 f :11 :- illi; tais: -... rstal. z •:1L. 1.:“.• uli 1 icuInlis : I I i, a.l 1.1*:3i, Is_,.. g , ,LIS, p(ti: )1, p ist , :::j• :-... n ir :n: , n:Lulicsk enntnr, inay- ). part tae iatn: nat: eiiil IL , t•n (fre s inenif2: •• t tnn uppL•L• part Dur; 11- : cc ilLuicticied- -by - cur t er •s:- .tte.: Oil g(-)tre ILfi tue t )r) 51:_• ingal; thni: t )11 tilt• fai 5 ina: fr•un ta• (:; then-, is ut, i Liut tier in It is p t drix• far -• Thc atI z ttie: litlo is rer: t:;:ase .".part :ni - nngnt Flye-a-C“ ssing ( tiust )it, the beYt fl tu neach tiiu rielu is the laKt at.•IL fu.:k Yeveral p :ssibiliticY :fht: Latns flere fl turnang 15 p :454 ;5, 551 rn) 11),juas•an t , 7 n ), (:• 01:0», (' 55: 0.5, 64 n ), )11tnu fl fl u fl n ,t inlie ( .0777 ( :N55.11, 472 n L11•: tre. '0 S laRE, II f nat nt fi;. rugi);Rl gu a;.1):n1 niapni.)g, i itS fl un as the field is aat :a• •n. Lne r ad , it is neeLsiel « t nip:st canlps several da s. 0 r. NORWAY 60W • est fr the r )3ci bet,, een P)1,-rj , is kiidiievarru, vitli tups ap t 46.1 m t ttpt, :tiouth 7 ;3 ru t ) the .'n-th (st•we •st ti )n' lay tik9-t• rt seec :n p litTetti• riti war).en, t•-ith taps a ti 7 - .)(r) m et» tht ne- iinty„).1 n::. auther i•t - 7 re 6.-st : the nrea ret r -nd ti hehe: thp-! 1 i•c-; 11' til the this Htter n nitain), - :,n -ntn t ( rt) n, pE]rt SE pti preE ( r! ) !)e riecy L.1nireS Wi )1. II:- 3.) ,-;t • rhL• it rt:L. fnr. nilt *it r. • •i Ct fl ). rir Generally, the rock has a weathering crust, oxydation crust, up to 1/2 cm thickness. Even more, the rodc is covered by lichens, whose thickness varies from some tens of mm. to some cm. But anyway, these two facts are enough to mask completely the petrography, the limits between rock-types. The rock is often broken, with lots of joints whose surfaces are weathered, rusted, or with a chloritic coating. li might be difficult to get a good hand-specimen with a fresh cut. From go )d, the outcrop conditions are getting very bad when onsiclering detail structures such as in a fine-grained greenstone, or as gradded beddings, cross beddings, in banden rocks. Glacial streaks might also mask primary features of the roc,):. 1.1.4. CLIMATE Generally the snow disappears at the beginning of June in low areas; some zones, covering important surfaces, might be snow-covered during all summer. The melting of snow causes strong flood of the rivers, so that there are man; river-crossing problems for the geologist. Snowfall might occur at any moment in summer time. Temperatures range from 5°C (or less) up to 30°C within a few hours. The wind may be very strong. It happens that it is very strong in altitude and inexistant in the valley, causing an irregular gradient of pressure that should be takei into consideration when using an altimeter. According to floatplane piots, wind up to 50-60 kt/h are not uncommon. When the observatorium of Sukkertoppen was still operating at the beginning of the century, winds up to 60 m/s have been measured. I. E The summer 1974 was rather favourable concer1, ng the snow- conditions;the consequence of a winter with little snow and a warm wave at mid-June was that the area was free of snow. Our field experience from previous years indicates that such case is seldom. In 1975 the situation was very unusual, much more unpleasant in terms of working conditions: at mid-June the whole field above 400 rn was still snow-covered and the lakes were frozen, excepted in a zone of 2-3 km from the shore of the fjord. Mid-July the lakes were still frozen above 400 m and crossable some tens of meters higher. End-July even big lakes such as Storelvan ( 634 m) were still frozen. Baddervan ( 575 m) was free of ice, with important floating ice. Nikkeluob'baljav're (675 m) was frozen, except a small zone of some tens of meters on one side, and a very strong ice on the other side. The ice broke after a heavy storm and rain on August 6th. The lakes we found above 800 m kept frozen all the summer. The snow cover was important too. End June / beginning July it was very strong on slopes to the E (50 - 80%) and 20-50% on slopes to the W (above 400 m). Later, the snow melted, but important zones still remained covered, at the foot of cliffs or on the bottom of the valley. Big tunnels up to some meters high were taking shape above the streams and rivers flowing under the snow, forming dangerous snow-bridges, invisible until they were broken. This fact represented an additional danger for the work. Epzt of August some snowfalls happened above 700 m. At the be- ginning of September there was a period of 4 days of windstorm and snowfalls above 570 m.
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