Deposit number | Country | Location | Names | Commodities |
15 | Sweden (Nörrbotten County) | 67.27.46 N -- 022.03.11 E | Junosuando; Junosuando Södra | Fe |
Database name: | World Fe-oxide+/-Cu-Au-U (IOCG) deposits | ||||||
Compilers: | Sunil S. Gandhi | ||||||
Release date: | 2015-03-04 | ||||||
Deposit name(s): | Junosuando; Junosuando Södra | ||||||
Political location(s): | Sweden; Province or state: Nörrbotten County; Nearest community: Gällivare (70 km NE) | ||||||
Deposit clan (type): | Iron Skarn-type | ||||||
Deposit (sub) types: | Junosuando and Nya Isovaara regarded as metasomatic skarn iron deposits, and the other 4 deposits in the 8 km long zone as metamorphosed banded iron ore deposits; 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 status: | closed; Size category: 28 Mt | ||||||
Geologic province: | Svecofennian Orogen | ||||||
Geologic subprovince: | Northern Svecofennian | ||||||
Geologic district: | Masugnsbyn (Ore District) | ||||||
Commodities: | Fe | ||||||
Mineralization styles: | disseminated; massive | ||||||
Geological ages: | Late Paleoproterozoic (mineralization) Late Paleoproterozoic (host rocks) | ||||||
Host rocks: | (1) metamorphic; metasedimentary schist (graphitic schist on the hanging wall, associated with felsic and mafic volcanics and carbonates); Depositional setting: continental
(2) intrusive; granite suite (footwall rock; intrusive into graphitic schist); Magma series/sedimentary package/metamorphic group: calc-alkaline; Depositional setting: continental; Metamorphic grade: none
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Related igneous rocks: | (1) intrusive; granite suite (perthitic granite); Initials: granite ; Magma series: calc-alkaline; Depositional setting: continental | ||||||
Alteration signatures: | skarn: diopside, tremolite, actinolite and calcite; What was altered: calcareous metasediments scapolitization: scapolite ; What was altered: calcareous metasediments albitization: albite; What was altered: feldspar biotitization: biotite; What was altered: mafic silicates serpentinization: serpentine; What was altered: mafic silicates | ||||||
Mineralogy: | (alteration): pyrite, pyrrhotite, tremolite, actinolite, diopside, phlogopite, serpentine (gangue): calcite (mineralization): magnetite | ||||||
Deposit shape: | tabular
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Qualified comments: | (Applies to: discovery and development) Discovered in 1642; among the first known iron deposits in Nörrbotten; production of 0.1 Mt from 1644 to 1700; resources of 27.9 Mt averaging 32.3 % Fe, 1.9 % S and 0.08 % Cu; exploration since 1920. | ||||||
References: |
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Resource data: |
Estimate date: 1700; 27.9 million metric tons ore; Combined with production?: yes; Provisional entry?: yes
Percent weights allocated to deposit: 100.0% |