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MALMDATABASEN
Registrering 5610 - 003 Caskinjohka
(Objekt Id: 695)
(Sist oppdatert: 13.02.2023)

Lokalisering
Fylke: Finnmark Kommune: Kárášjohka (5610)
Kart 1:50000: Basevuov'di (2032-1) Kart 1:250000: Inari
Koordinatsystem: EU89-UTM Zone 35
Øst: 445025 m. Nord: 7646235 m.
Lengdegrad: 25.6302120 Breddegrad: 68.9216210
Kartvisning

Ressurs
Ressurstype: Edelmetaller (Au, Ag, PGE) Ressursundertype: Gull
Element(er): Au
Betydning
Råstoffbetydning: Liten betydning (reg. 18.02.2015)

Ressurser og produksjon
Aktivitet: Gruvedrift Reserver:
Driftsmetode: Dagbrudd Historisk produksjon:


Mineralisering
Æra: Kenozoikum Periode: Kvartær
Genese: Klastisk sediment Form: Uregelmessig
Hovedtekstur: Poreromsfylling Min. fordeling: Uregelmessig
Kornstørrelse: Meget ujevnkornet Hovedomvandling:
Strøk/Fall: Retning:
Feltstupning:
Stratigrafisk klassifikasjon av vertsbergart
Æra: Periode:
Provins:
Geotek.enhet:
Tektonisk complex:
Intrusivt komplex:
Gruppe: Formasjon:

Mineralogi
Relasjon Mineral Mengde
Malmmineral Gull Aksessorisk mineral (<1%)

Opplysning(er) i fritekstformat
Sammendrag
The deposit is situated immediately south of a bend in the Cas'kinjohka river at the northern end of the Thesen gold field. The workings consist of a number of shallow shafts sunk into a terrace 7-10 m above the river (Bjørlykke). The terrace containing several ice-depressions, is built of water worn boulders and stratified gravel and coarse sand. The boulders consist of different types of orthogneisses in contrast to exposures of amphibolites immediately to the east of the workings.

Litteraturfortegnelser:
Fra NGU's Referansearkiv.:
Bjørlykke, Harald , 1966
De alluviale gullforekomster i indre Finnmark.
;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.236;1-66 sider
Abstrakt:
The first find of alluvial gold in Finnmarken was made by inspector (bergmester) Tellef Dahll in 1866 in sand from a small river named Nitusjokka near Karasjok. During the following 5 years gold deposits were found in all the rivers of the Tana river systm and the Alta and Reisa rivers. Gold has been found in small amount in all kinds of sand- and gravel deposits and also in the unwashed moraine deposits. The gold fields which have been subject to production or prospection work are situated at the upper parts of the rivers. The occurrences of alluvial gold in Finnmark may be classified in The following way: 1. Preglacial accumulations undisturbed by ice erosion during the ice age. 2: Preglacial accumulations disturbed and redeposited in moraines and fluvioglacial deposits. 3. Accumulations in postglacial river beds. The gold in these deposits seems chiefly to have been washed out from the moraines. Mineralogical analyses of the mineral composition of the gold-bearing sand and gravel have been carried out. The minerals of the gold-bearing deposits may be divided in two groups: 1. Minerals belonging to the surrounding solid rock. 2. Minerals which do not seem to belong to the solid rock in the neighbourhood of the deposits.


Faktaarket ble generert 29.03.2024

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