English version
	MALMDATABASEN
	Registrering 5612 - 028 Scieccanjohka
	(Objekt Id: 705) (Sist oppdatert: 15.02.2005)

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
	Gangmineral	Kvarts	Hovedmineral (>10%)
	Gangmineral	Feltspat	Hovedmineral (>10%)
	Gangmineral	Serisitt	Aksessorisk mineral (<1%)
	Malmmineral	Hematitt	Underordnet mineral (1-10%)
	Malmmineral	Gull	Aksessorisk mineral (<1%)

Opplysning(er) i fritekstformat

Sammendrag

Shallow workings are found in the old river channel of Scieccanjohka river (Bjørlykke, 1966), which is situated about 5-6 m higher and 200 m west of the present river. The bedrocks in the area consist of strongly fractured and in areas schistose gneissic granites with quartz-rich veins of pegmatite along the foliation. The gneisses is frequently strongly weathered. The bedrocks form small hills and ridges with intervening areas with swamps and small auriferous gravel deposits along the old river channel which has been worked over a distance of about 500 m. The alluvial material richest in gold occur in open clefts in the bedrocks which have been worked several places.

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.

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Faktaarket ble generert 24.04.2024

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