Deposit number | Country | Location | Names | Commodities |
11 | Sweden (Nörrbotten County) | 67.22.28 N -- 023.17.37 E | Sahavaara Stora; Stora Sahavaara | Fe |
Database name: | World Fe-oxide+/-Cu-Au-U (IOCG) deposits | |||||||||
Compilers: | Sunil S. Gandhi | |||||||||
Release date: | 2015-03-04 | |||||||||
Deposit name(s): | Sahavaara Stora; Stora Sahavaara | |||||||||
Political location(s): | Sweden; Province or state: Nörrbotten County; Nearest community: Kaunisvaara (3 km WSW) | |||||||||
Deposit clan (type): | Iron Skarn-type | |||||||||
Deposit (sub) types: | stratiform sheets and lenses in assemblage of phyllite, marl, graphytic shale and carbonate; iron oxides with skarn minerals; massive and disseminated ore; 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. stratiform; synsedimentary iron oxide deposition across a wide spectrum of siliceous and carbonate environment, followed by regional metamorphism; regionally grades into skarn-type iron oxide deposits; Reference: Carlon, C. J., 2000: Iron Oxide Systems and Base Metal Mineralisation in Northern Sweden; Section Eurasia and Africa, in Hydrothermal Iron Oxide Copper-Gold and Related Deposits: A Global Perspective, Volume 1, Edited by Porter, T. M., Australian Mineral Foundation, Adelaide, Australia, PGC Publishing, Adelaide, 349 p, p. 283 - 296 | |||||||||
Deposit status: | significant prospect; Size category: 82 Mt | |||||||||
Geologic province: | Svecofennian Orogen | |||||||||
Geologic subprovince: | Northern Svecofennian | |||||||||
Geologic district: | Kaunisvaara (Ore District) | |||||||||
Commodities: | Fe | |||||||||
Mineralization styles: | massive; disseminated | |||||||||
Geological ages: | Late Paleoproterozoic (mineralization) Late Paleoproterozoic (host rocks) | |||||||||
Regional tectonic structure: | anticline, major (trend N to NE; more than 20 km in length; limbs dip 50 to 65°) | |||||||||
Host rocks: | (1) sedimentary; sandstone (sandstone metamorphosed to quartzite); Depositional setting: continental; Metamorphic grade: lower amphibolite (2) sedimentary; mudstone (interbedded with marl and sandstone); Depositional setting: continental; Metamorphic grade: greenschist-amphibolite (3) sedimentary; mudstone-carbonate-sandstone (graphitic shale interbedded with marl and sandstone)
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Metallogenic signatures: | Fe-Cu | |||||||||
Alteration signatures: | skarn: diopside, tremolite; What was altered: calcareous material phyllitization: biotite; What was altered: mafic silicates graphitization: graphite; What was altered: carbonaceous matter in shale serpentinization: serpentine; What was altered: mafic silicates | |||||||||
Mineralogy: | (alteration): serpentine (mineralization): magnetite, pyrite, chalcopyrite, pyrrhotite, phlogopite, diopside, tremolite, actinolite, graphite | |||||||||
Deposit shape: | tabular
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Qualified comments: | (Applies to: discovery and development) Discovered in 1918; explored during 1961-1971; resources of 82 Mt of ore to a depth of 400 m; average grade: 41 % Fe, 0.1 % P, 0.08 % Cu and 2.5 % S; no mining; 5 km SSW of 68.5 Mt Tapulivuoma deposit. One of the 6 deposits in a 20x1 km, NNE-trending zone of metasediments; from N to S: Palotieva, Tapulivuoma, Ruutijärvi, Södra Sahavaara, Stora Sahavaara, Suksivuoma and Karhujärvi; dip 50-65° W or NW. | |||||||||
References: |
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Resource data: |
82 million metric tons ore; Combined with production?: no; Provisional entry?: yes
Percent weights allocated to deposit: 100.0% |