Deposit group number | Country | Location | Names | Commodities |
26 | Sweden (Nörrbotten) | 67.45.00 N -- 021.25.12 E | Kuusi Nunasvaara | Fe; Cu; Pb |
Database name: | World Fe-oxide+/-Cu-Au-U (IOCG) deposits | ||||||
Compilers: | Sunil S. Gandhi | ||||||
Release date: | 2015-03-03 | ||||||
Deposit group name(s): | Kuusi Nunasvaara | ||||||
Political location(s): | Sweden; Province or state: Nörrbotten; Nearest community: Kiruna (60 km ESE) | ||||||
Deposit clan (type): | Iron Skarn-type | ||||||
Deposit (sub) types: | stratiform iron deposits in metasediments (Upper Schists) and greenstones of Vittangi Group; pyrite, pyrrhotite and chalcopyrite with magnetite; skarn-type alteration mineral assemblage; Reference: Zitzmann, A. (Editor(s)), 1978: The Iron Ore Deposits of Europe and Adjacent Areas: Explanatory Notes to the International Map of the Iron Ore Deposits of Europe, 1:2,500,000 (Lists and Tables); International Geological Congress, Commission for the Geological Map of the World, Subcommission for the Metallogenic Map of the World, Bundesanstalt fur Geowissenschaften und Rohstoffe, Postfach 51 01 53, D-3000 Hannover 51, Volume II, 386 p. host graphitic shale may have inherent sulphides; iron oxides introduced and skarn minerals developed during mineralization; Reference: Zitzmann, A. (Editor(s)), 1978: The Iron Ore Deposits of Europe and Adjacent Areas: Explanatory Notes to the International Map of the Iron Ore Deposits of Europe, 1:2,500,000 (Lists and Tables); International Geological Congress, Commission for the Geological Map of the World, Subcommission for the Metallogenic Map of the World, Bundesanstalt fur Geowissenschaften und Rohstoffe, Postfach 51 01 53, D-3000 Hannover 51, Volume II, 386 p. | ||||||
Deposit group status: | significant prospect; Size category: 23.72 Mt; Status comments: Kuusi Nunasvaara 1, 2, 3 and 4 deposits are along a 3 km long N-trending zone; each deposit is about 500 m long and 20-30 m wide; total resources 23.72 Mt; ore contains 30.5 % Fe, 0.1 % P, 1.6 % S
significant prospect; Status comments: Kuusi Nunasvaara deposits are part of the Vittangi group of 11 deposits located along two belts about 10 km long; hosted by Vittangi Greenstone Group; discovered at turn of 20th century; no minining | ||||||
Geologic province: | Svecofennian Orogen | ||||||
Geologic subprovince: | Northern Svecofennian | ||||||
Geologic district: | Vittangi (Ore District) | ||||||
Deposit object located: | approximate centroid of the gr | ||||||
Commodities: | Fe; Cu; Pb | ||||||
Geological ages: | Late Paleoproterozoic (mineralization) Late Paleoproterozoic (host rocks) | ||||||
Coincident features: | bedding in host strata (banded and massive ore distributed along the strata, with some disseminations around them); Coincident feature name: Vittangi Greenstone Group intrusive contact (orebodies at the contact of granodiorite, which is intrusive into the Vittangi Greenstone Group); Coincident feature name: Granodiorite massif | ||||||
Host rocks: | (1) sedimentary; mudstone-carbonate-sandstone-chert (carbonate-graphitic shale associated with greenstones); Depositional setting: carbonate platform; Metamorphic grade: greenschist-amphibolite
(2) volcanic; mafic volcanic rocks (mafic volcanics associated with carbonate-graphitic shale); Magma series/sedimentary package/metamorphic group: calc-alkaline; Depositional setting: carbonate platform; Metamorphic grade: greenschist-amphibolite
(3) intrusive; granodiorite-tonalite suite (granodiorite pluton; the Vittangi iron deposits are located on two sides of the pluton); Depositional setting: carbonate platform; Metamorphic grade: greenschist | ||||||
Metallogenic signatures: | Fe-Cu | ||||||
Alteration signatures: | skarnification: diopside, tremolite, calcite; What was altered: carbonate-rich sediments serpentinization: serpentine, talc; What was altered: mafic volcanics and tuffites chloritization: chlorite; What was altered: mafic silicates | ||||||
Mineralogy: | (alteration): tremolite, actinolite, diopside, calcite, chlorite, serpentine, talc (mineralization): magnetite, pyrite, pyrrhotite, chalcopyrite, galena | ||||||
Deposit group shape: | tabular
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References: |
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Resource data: |
23.72 million metric tons ore; Combined with production?: no; Provisional entry?: yes
Percent weights allocated to camp: 100.0% | ||||||
Associated deposit(s): | Kuusi Nunasvaara 4 (39), Kuusi Nunasvaara 3 (40), Kuusi Nunasvaara 2 (41), Kuusi Nunasvaara 1 (42) |