CANADIAN AND WORLD MINERAL DEPOSIT DATABASES
Geological Survey of Canada


Deposit number Country Location Names Commodities
31 Sweden (Nörrbotten County) 67.48.12 N -- 019.31.25 E Ekströmsberg Fe; P
 
Database name: World Fe-oxide+/-Cu-Au-U (IOCG) deposits
Compilers: Sunil S. Gandhi
Release date: 2015-03-04
   
Deposit name(s): Ekströmsberg
Political location(s): Sweden; Province or state: Nörrbotten County; Nearest community: Kiruna (30 km WSW)
Deposit clan (type): Kiruna-type
Deposit (sub) types: several tabular, stratabound, stacked ore lenses in stratigraphic zone 160 m thick; 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: 37 Mt; Status comments: discovered in 1907; no mining; average grade 55.9 % Fe and 1.3 % P; ore contains 0.18 % Mn, 0.01-0.06 % S, 1.1-3.5 % Si, 4.2 % CaO, 0.06 % MgO, 1.7 % Al2O3, 0.03-0.29 % Ti and 0.04- 0.06 % V
Geologic province: Svecofennian Orogen
Geologic subprovince: Northern Svecofennian
Geologic district: Ekströmsberg (Ore District)
Commodities: Fe; P
Mineralization styles: massive; banded
Geological ages: Late Paleoproterozoic (mineralization)
Late Paleoproterozoic (host rocks)
Tectonic setting: continental marginal arc-fore-arc; convergent; Formal name: late Svecofennian arc (host rocks)
Coincident features: stratification in host sequence (concordant tabular body between volcanic units); Coincident feature name: Kiruna Porphyries
Host rocks: (1) volcanic; felsic volcanic rocks (trachytic and rhyolitic flows); Depositional setting: continental arc; Metamorphic grade: greenschist
Individual lithologies:quartz porphyry
Host rock stratigraphy:Kiruna Porphyries
Metallogenic signatures: Fe-P
Alteration signatures: sericitization: sericite; What was altered: feldspars
hematization: hematite; What was altered: magnetite
Mineralogy: (alteration): diopside, muscovite
(gangue): calcite, actinolite
(mineralization): magnetite, hematite, martite, apatite
Deposit shape: zone of stacked tabular bodies and lenses
Deposit dimensions:strike length: 1,400 metres
thickness: 160 metres
depth: 500 metres
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.

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.

37 million metric tons ore; Combined with production?: no; Provisional entry?: yes
Grade-commodity information:Fe: 55.9 percent
S: 0.032 percent
Reference: Anonymous, 2000: Swedish Database of Mineral Deposits; Email
Percent weights allocated to deposit: 100.0%

Generated 2015-03-04 14:16:36 with GQuery -- 3.7 ADO (3.19..3.22 -- 2008-12-16)
GlobalDB System, Geological Survey of Canada, Natural Resources Canada