English version
	MALMDATABASEN
	Registrering 5610 - 011 Noai'datjav'ri
	(Objekt Id: 743) (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	Granat	Hovedmineral (>10%)
	Gangmineral	Zirkon	Underordnet mineral (1-10%)
	Malmmineral	Titanomagnetitt	Hovedmineral (>10%)
	Malmmineral	Gull	Aksessorisk mineral (<1%)

Opplysning(er) i fritekstformat

Sammendrag

The deposit is situated on the northern side of Karasjohka river at immediately south of vuolit Noai'datjavri and 50-100 m inland from the riverbank. Gravel and sand with large boulders forming the top layer of a terrace situated 6-8 m above the river, has been worked over an area of 2-3 Da. According to Bjørlykke (1966) about 1-2 kg gold including up to 2 gram nuggets, was produced from the sand and gravel containing about 0.7-0.8 g Au/m3. The gold is enriched along the interface between the sand and gravel in the reworked till and undisturbed blocky till. Rich pockets of gold occur at the lee side of big boulder in the former river bed (Bjørlykke, 1966).

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 20.04.2024

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