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THE ORE DATABASE
Occurence 5622 - 031 Poikekuru
(Object Id: 729)
(Last updated: 01.02.2007)
Location
County: Finnmark Municipality: Porsanger (5622)
Map 1:50000: Lakselv (2035-3) Map 1:250000: Honningsvåg
Coordinate system: EU89-UTM Zone 35
East: 425119 m. North: 7769437 m.
Longitude: 25.0360280 Latitude: 70.0211430
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Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu
Importance
Raw material meaning: Little Importance (reg. 18.02.2015)

Resources and production
Activity: Pitting Reserves:
Operating method: Historical production:


Operations
From - To Activity Comments
1901 - 1908 Pitting Described by Prof. Otto Nordenskjöld, 1909.
1988 - 1988 Detail mapping Company/Institution :Geological Survey of Norway
Réjean Girard, 1989.

Mineralization
Genesis: Form: Irregular
Main texture: Min. distribution:
Main grain size: Main alteration:
Strike/Dip: Direction:
Plunge:
Stratigraphic classification of host rock
Era: Proterozoic Period: Paleoproterozoic
Province: Troms-Finnmark Basement Province
Geotec.unit: Karasjok Greenstone Belt
Tectonic complex:
Igneous complex:
Group: Formation:

Mineralogy
Relationship Mineral Amount
Ore mineral Chalcocite Subordinate mineral (1-10%)
Ore mineral Bornite Subordinate mineral (1-10%)
Ore mineral Chalcopyrite Subordinate mineral (1-10%)
Ore mineral Pyrite Subordinate mineral (1-10%)
Ore mineral Arsenopyrite Accessory mineral (<1%)
Ore mineral Magnetite Accessory mineral (<1%)
Ore mineral Molybdenite Accessory mineral (<1%)
Ore mineral Copper Accessory mineral (<1%)

Lithology:
Relationship Rock Origin
Host rock Quartzite Sedimentary
Metamorphic facies :Amphibolite
Host rock Massive amphibolite Extrusive
Original rock :Basalt
Metamorphic facies :Amphibolite

Information(s) in free text format
Free text
The Poikekuru showing is composed of numerous small copper occurrences within a massive or foliated amphibolite and neighbouring units. 90 small pits (2x2x1m) and trenches have been excavated where malachite were found. Exploration activities, pitting, trenching and underground work, were mainly performed in the period 1901-1908. Six different types of mineralizations occur: A: Disseminated chalcocite (<2%) is found in cm to dm wide and meters long quartzo-feldspathic carbonate veins within amphibolites and gabbros. B: Disseminated chalcocite (0-5%) is found in cm to dm wide and meters long shear zones within amphibolites. C: Meter-wide breccia zones with disseminated chalcocite, pyrite, bornite, also occurring as mm sized blebs and stringlets in the carbonate-quartz matrix. D: Impregnations of chalcocite and locally chalcopyrite are found in the host amphibolites. Usually <2%. E: Dissemination of chalcocite in thin, dm to m, quartzite beds at the border to the overlying massive amphibolite. Also at the contact of thicker beds and amphibolite, locally disseminated within the adjacent amphibolite. One 50m long adit and 8 trenches (2x2x15m) have been dug at the contact between the massive amphibolite and the underlying quartzite. F: Nodules, cm to dm, of massive chalcocite are present within mylonitic carbonates or schists.

Bibliography:
From NGU's Reference Archive:
Nordenskjøld, O.
Porsanger felt. Geologisk oversiktskart 1:25 000.
;Norges geologiske undersøkelse;KART;Bergarkivet; No.K 973

Nordenskjøld, O. , 1908
Porsangerfeltets kopparmalmer.
;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 574;3 pages
Abstract:
Lok. Nr. 50026-50. Kortfattet oversikt over Porsangerfeltets malmtyper og forslag til videre undersøkelser bl.a. prøvedrift. Forfatteren henviser til egen, mer omfattende rapport som en gitt tidligere.

References not to be found in NGU's Reference Archive.:
Juve, G. 1968: Porsanger kobber- og kisforekomster, Finnmark, Norge. Geol. För. Stockh. Förh. 90, 461-462.

The fact sheet was created on 05.05.2024
Questions or comments regarding the fact sheet can be emailed to:
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