Norsk versjon
THE ORE DATABASE
Occurence 5612 - 028 Scieccanjohka
(Object Id: 705)
(Last updated: 15.02.2005)

Location
County: Finnmark Municipality: Guovdageaidnu (5612)
Map 1:50000: Basevuov'di (2032-1) Map 1:250000: Inari
Coordinate system: EU89-UTM Zone 34
East: 670276 m. North: 7640895 m.
Longitude: 25.2271280 Latitude: 68.8266710
Show on map

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
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Feldspar Major mineral (>10%)
Gangue mineral Sericite Accessory mineral (<1%)
Ore mineral Hematite Subordinate mineral (1-10%)
Ore mineral Gold Accessory mineral (<1%)

Information(s) in free text format
Abstract
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.

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.


The fact sheet was created on 29.03.2024

Questions or comments regarding the fact sheet can be emailed to:
ressursdatabaser@ngu.no
Copyright © 2024 Geological Survey of Norway