CANADIAN AND WORLD MINERAL DEPOSIT DATABASES
Geological Survey of Canada


Deposit number Country Location Names Commodities
72 Sweden (Nörrbotten County) 67.27.09 N -- 022.03.29 E Masugnsbyn Fe
 
Database name: World Fe-oxide+/-Cu-Au-U (IOCG) deposits
Compilers: Sunil S. Gandhi
Release date: 2015-03-04
   
Deposit name(s): Masugnsbyn
Political location(s): Sweden; Province or state: Nörrbotten County; Nearest community: Gällivare (70 km NE)
Deposit clan (type): Iron Skarn-type
Deposit (sub) types: stratiform massive and banded; 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: significant prospect; Size category: medium
Geologic province: Svecofennian Orogen
Geologic subprovince: Southern Svecofennian
Geologic district: Masugnsbyn (Ore District)
Commodities: Fe
Mineralization styles: stratiform magnetite layers and lenses
Geological ages: Late Paleoproterozoic (mineralization)
Late Paleoproterozoic (host rocks)
Host rocks: (1) metamorphic; metasedimentary schist; Metamorphic grade: amphibolite
Individual lithologies:limestone
dolomite
amphibolite
Metallogenic signatures: Fe-Mn
Alteration signatures: skarn: garnet and diopside; What was altered: calcareous sediments
Mineralogy: (gangue): diopside, garnet
(mineralization): magnetite, pyrite
Qualified comments: (Applies to: discovery and development) Discovered in 1642, among the first known iron deposits in Nörrbotten; no mining since 1800; new discoveries after 1920; Junosuando: 27.9 Mt averaging 25 - 30 % Fe, 0.4 - 1.3 % Mn, 0.024 % P, 1.9 % S. 8 km long zone with 6 deposits, from Masugnsbyn northward: Junosuando, Vähäravaara, Välivaara, Vuoma, Isovaara and Nya Isovaara; the largest Junosuando: 3 km long, 100 m wide, 300 m deep.
References:
Anonymous, 2000
Swedish Database of Mineral Deposits
Email

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.


Generated 2015-03-04 14:16:46 with GQuery -- 3.7 ADO (3.19..3.22 -- 2008-12-16)
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