CANADIAN AND WORLD MINERAL DEPOSIT DATABASES
Geological Survey of Canada


Deposit number Country Location Names Commodities
24 Sweden (Nörrbotten County) 67.11.11 N -- 020.40.38 E Malmberget Fe; P
 
Database name: World Fe-oxide+/-Cu-Au-U (IOCG) deposits
Compilers: Sunil S. Gandhi
Release date: 2015-03-04
   
Deposit name(s): Malmberget
Political location(s): Sweden; Province or state: Nörrbotten County; Nearest community: Gällivare (7 km N)
Deposit clan (type): Kiruna-type
Deposit (sub) types: sheet-like ore lenses; 20 or more; hosted by felsic to intermediate, porphyritic volcanic rocks, which are more strongly deformed and metamorphosed compared with host rocks of the Kiirunavaara deposit; 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.
the ore bodies are sheared, refolded, highly strained, plunging shoot-like bodies, long recognized as recrystallized deposits; thus they display strain due to competancy contrast with the host strata; 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: producer; Size category: medium
Geologic province: Svecofennian Orogen
Geologic subprovince: Northern Svecofennian
Geologic district: Malmberget (Ore District)
Commodities: Fe; P
Mineralization styles: massive; breccia
Geological ages: Late Paleoproterozoic (mineralization)
Late Paleoproterozoic (host rocks)
Tectonic setting: continental marginal platform-foreland; convergent; Formal name: late Svecofennian arc (country rocks)
Coincident features: volcanic strata boundaries (Stacked tabular bodies and lenses in a synform with 50° dip inward)
Regional tectonic structure: synform (complicated synformal structre; dips generally about 50° inward; probably several ore horizons)
Host rocks: (1) volcanic; intermediate-felsic volcanic rocks (intermediate to felsic volcanics); Depositional setting: continental; Metamorphic grade: amphibolite
External host rock forms:porphyritic, in part mylonitized and gneissic
Host rock protoliths:dacite-rhyolite (sodic or potassic; referred to as Porphyry-Leptite Formation in older literature); Host rock protolith name: Kiruna Porphyries
Internal host rock structures:porphyritic, fine grained granular and gneissic
Individual lithologies:dacite-rhyolite (deformed, metamorphosed and hydrothermally altered intermediate to felsic volcanic rocks)
Host rock stratigraphy:Kiruna Porphyries
Metallogenic signatures: Fe-P
Alteration signatures: skarn: garnet and diopside; What was altered: volcanic and calcareous rocks
scapolitization: scapolite ; What was altered: feldspars
tourmalinization: tourmaline; What was altered: volcanic and volcaniclastic rocks
Mineralogy: (gangue): hornblende, corundum, tourmaline
(mineralization): magnetite, hematite
Deposit shape: zone of stacked tabular bodies and lenses
Deposit dimensions:length: 5 kilometres
width: 3 kilometres
length down-dip: 0.8 kilometres
Qualified comments: (Applies to: discovery and development) Discovered in1669; exploitation started in 1740; large scale mining from 1888 by open pit and underground methods; some 287 Mt mined out; average ore grade: 50 % Fe and 0.6 % P; richer ore of 68 % Fe
References:
Anonymous, 2000
Swedish Database of Mineral Deposits
Email

Frietsch, R.; Papunen, H.; Vokes, F. M., 1979
The Ore Deposits in Finland, Norway and Sweden - A Review
Economic Geology, Volume 74, p. 975 - 1001

Geijer, P., 1931
The Iron Ores of the Kiruna Type: Geographical Distribution, Geological Character and Origin
Sveriges Geologiska Undersökning, Serie C, Geological Survey of Sweden, Publication code 367, 39 p.

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.

Resource data:
Disclaimer - Reserves/Resource Data

Her Majesty the Queen in Right of Canada, represented by the Minister of Natural Resources (NRCan) does not warrant or guarantee the accuracy, completeness or fitness for any purpose of Reserve and Resource information (Data) contained in this database, including whether the Data is compliant with any securities regulations or standards, and NRCan does not assume any liability with respect to any damage or loss incurred as a result of the use made of the Data.

Resource and reserve figures are historical in nature. The Data source provided with each set of figures should be cited if the Data are re-reported.

Estimate date: 2006-12-31; 129 million metric tons ore; Combined with production?: no; Provisional entry?: no; Resource category: proven reserve
Grade-commodity information:Fe: 41.2 percent
Reference: Anonymous, 2007: Annual Report 2006: LKAB; Annual Report, http://www.lkab.com, Luossavara Kirunavaara Aktie Bolag (LKAB), 118 p.
Percent weights allocated to deposit: 100.0%


Estimate date: 2007-12-31; 80 million metric tons ore; Combined with production?: no; Provisional entry?: no; Resource category: probable reserve
Grade-commodity information:Fe: 40.6 percent
Reference: Anonymous, 2007: Annual Report 2006: LKAB; Annual Report, http://www.lkab.com, Luossavara Kirunavaara Aktie Bolag (LKAB), 118 p.
Percent weights allocated to deposit: 100.0%


Estimate date: 2007-12-31; 117 million metric tons ore; Combined with production?: no; Provisional entry?: no; Resource category: measured resource
Grade-commodity information:Fe: 41.9 percent
Reference: Anonymous, 2007: Annual Report 2006: LKAB; Annual Report, http://www.lkab.com, Luossavara Kirunavaara Aktie Bolag (LKAB), 118 p.
Percent weights allocated to deposit: 100.0%


Estimate date: 2007-12-31; 18 million metric tons ore; Combined with production?: no; Provisional entry?: no; Resource category: indicated resource
Grade-commodity information:Fe: 42.7 percent
Reference: Anonymous, 2007: Annual Report 2006: LKAB; Annual Report, http://www.lkab.com, Luossavara Kirunavaara Aktie Bolag (LKAB), 118 p.
Percent weights allocated to deposit: 100.0%


Estimate date: 2007-12-31; 19 million metric tons ore; Combined with production?: no; Provisional entry?: no; Resource category: inferred resource
Grade-commodity information:Fe: 41.2 percent
Reference: Anonymous, 2007: Annual Report 2006: LKAB; Annual Report, http://www.lkab.com, Luossavara Kirunavaara Aktie Bolag (LKAB), 118 p.
Percent weights allocated to deposit: 100.0%

Generated 2015-03-04 14:16:46 with GQuery -- 3.7 ADO (3.19..3.22 -- 2008-12-16)
GlobalDB System, Geological Survey of Canada, Natural Resources Canada