CANADIAN AND WORLD MINERAL DEPOSIT DATABASES
Geological Survey of Canada


Deposit number Country Location Names Commodities
22 Sweden (Nörrbotten County) 67.41.42 N -- 019.10.52 E Tjårrojåkka; Tjårrojåkka Fe Fe; P
 
Database name: World Fe-oxide+/-Cu-Au-U (IOCG) deposits
Compilers: Sunil S. Gandhi
Release date: 2015-03-04
   
Deposit name(s): Tjårrojåkka; Tjårrojåkka Fe
Political location(s): Sweden; Province or state: Nörrbotten County; Nearest community: Gällivare
Deposit clan (type): Kiruna-type
Deposit (sub) types: stratabound but quite irregular ore bodies and ore breccia in a pophyritic felsic volcanic sequence; 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: 52.6 Mt
Geologic province: Svecofennian Orogen
Geologic subprovince: Northern Svecofennian
Geologic district: Ekströmsberg (Ore District)
Commodities: Fe; P
Mineralization styles: massive; breccia
Geological ages: Late Paleoproterozoic (mineralization)
Late Paleoproterozoic (host rocks)
Tectonic setting: continental marginal basin-foreland; convergent; Formal name: late Svecofennian back arc extensional basin (host rocks)
Host rocks: (1) volcanic; mafic-intermediate volcanic rocks (associated with syenite porphyry sill or flow); Magma series/sedimentary package/metamorphic group: calc-alkaline; Depositional setting: continental; Metamorphic grade: greenschist
Host rock protoliths:basalt-andesite (dominantly andesitic); Host rock protolith name: Porphyrite Group
Host rock stratigraphy:Porphyrite Group
Metallogenic signatures: Fe-P-Cu
Alteration signatures: skarn: diopside, tremolite; What was altered: mafic to intermediate volcanic rocks
scapolitization: scapolite ; What was altered: calcic plagioclase
chloritization: chlorite; What was altered: mafic silicates
epidotization: epidote; What was altered: mafic silicate
Mineralogy: (alteration): scapolite, tremolite, diopside, chlorite, epidote
(gangue): feldspar, muscovite, quartz, biotite
(mineralization): magnetite, actinolite, chalcopyrite, bornite
Deposit shape: tabular
Deposit dimensions:length: 250 metres
thickness: 100 metres
depth: 150 metres
Qualified comments: (Applies to: discovery and devlopment) Discovered in 1963 by geophysical methods; estimated resources of 52.6 Mt of ore averaging 51.5 % Fe and 0.8 % P; 400 m to the WNW the Tjårrojåkka Cu deposit (DEPNO. 4) has estimated 13 Mt of ore containing 0.43 % Cu, hosted by wallrock-magnetite contact breccia with bornite, chalcopyrite and gold; no mining done to date.
References:
Anonymous, 2000
Swedish Database of Mineral Deposits
Email

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

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.

52.6 million metric tons ore; Combined with production?: no; Provisional entry?: yes
Grade-commodity information:Fe: 51.5 percent
Reference: Anonymous, 2000: Swedish Database of Mineral Deposits; Email
Percent weights allocated to deposit: 100.0%

Generated 2015-03-04 14:17:01 with GQuery -- 3.7 ADO (3.19..3.22 -- 2008-12-16)
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