Fact Sheet for <b>Occurence 5610 - 003 Caskinjohka</b>

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	THE ORE DATABASE
	Occurence 5610 - 003 Caskinjohka
	(Object Id: 695) (Last updated: 13.02.2023)

Location

County:

Finnmark

Municipality:

Kárášjohka (5610)

Map 1:50000:

Basevuov'di (2032-1)

Map 1:250000:

Inari

Coordinate system:

EU89-UTM Zone 35

East:

445025 m.

North:

7646235 m.

Longitude:

25.6302120

Latitude:

68.9216210

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Resource

	Resource Type:	Precious metals (Au,Ag,PGE)	Resource Subtype:	Gold
			Element(s):	Au

Importance

Raw material meaning:

Little Importance (reg. 18.02.2015)

Resources and production

	Activity:	Mining	Reserves:
	Operating method:	Open pit mining	Historical production:

Mineralization

Era: Cenozoic Period: Quarternary

Genesis: Clastic sediment Form: Irregular

Main texture: Pore space filling Min. distribution: Irregular (scattered)

Main grain size: Very unevenly grained Main alteration:

Strike/Dip: Direction:

Plunge:

Stratigraphic classification of host rock

Era: Period:

Province:

Geotec.unit:

Tectonic complex:

Igneous complex:

Group: Formation:

Mineralogy

Relationship Mineral Amount

Ore mineral Gold Accessory mineral (<1%)

Information(s) in free text format

Abstract

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.

Bibliography:

From NGU's Reference Archive:

Bjørlykke, Harald , 1966

De alluviale gullforekomster i indre Finnmark.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.236;1-66 pages

Abstract:

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.

Era:	Cenozoic	Period:	Quarternary
Genesis:	Clastic sediment	Form:	Irregular
Main texture:	Pore space filling	Min. distribution:	Irregular (scattered)

	Province:
	Geotec.unit:
	Tectonic complex:
	Igneous complex:

	Relationship	Mineral	Amount
	Ore mineral	Gold	Accessory mineral (<1%)