CANADIAN AND WORLD MINERAL DEPOSIT DATABASES
Geological Survey of Canada


 
Database name: Canadian Iron Formation
Custodial agency: Geological Survey of Canada
Compilers: G. A. Gross and E. M. Hillary
Release date: 2014-08-21
   
Deposit name(s): Borealis - 5 Southern Zone (occurrence); West Melville Iron Deposits (occurrence)
Longitude / Latitude: -85.30456 / 68.36473
Political location(s): Canada; Province or state: Nunavut; Subprovince or locality: Melville Peninsula
NTS map data: 047B07 (Mackar Inlet)
Deposit clan (type): iron formation
Deposit (sub) types: Algoma type; Reference: Underhill, D. H., 1970: Report on the 1970 Mineral Exploration Program, Melville Peninsula (060744); Mineral Assessment Report, Borealis Exploration Ltd; UnderhillDH (Norman H. Ursel Associates Ltd) (operator), Indian and Northern Affairs Canada, Publication code 060744
Deposit status: advanced project; Size category: significant; Status comments: Indicated resources of Southern zone based on surface areas determined by planimeter - 331 million long tons (Ref ID 2688)
Geologic province: Canadian Shield
Geologic subprovince: Rae craton
Deposit object located: centre of mineralized zone
Commodities: Fe
Mineralization styles: stratiform (mineralization zone); massive (mineralization zone)
Geological ages: Archean (host rocks)
Archean (mineralization)
Coincident features: fault(s)
Host rocks: (1) sedimentary; iron formation; Depositional setting: shallow marine; Metamorphic grade: amphibolite - lower; Component: mineralization zone
External host rock forms:tabular sedimentary body
Internal host rock structures:massive
Individual lithologies:iron formation - oxide
Host rock stratigraphy:Prince Albert group
Related igneous rocks: (1) intrusive; granite suite
Individual lithologies:granite
Metallogenic signatures: Fe
Mineralogy: (mineralization - massive / mineralization zone): magnetite, hematite, quartz
Deposit shape: tabular; Component: mineralization zone
Deposit dimensions:width: 183 metres
length: 1,280 metres
Qualified comments: (Applies to: location ) The location was taken from AR 060744 Figure 14: Geologic Map of the Borealis 5 Iron Formation Occurrence.

(Applies to: reserve/resource descriptions) Indicated reserves based on surface areas determined by planimeter - 3 zones (North, Central and South), total potential tonnage 1,406 million long tons (Ref ID 2688). No sampling done. Indicated reserves of Southern zone based on surface areas determined by planimeter - 331 million long tons, 276,000 tons per vertical foot.

(Applies to: property geology) The Borealis - 5 deposit is divided into 3 sections by two strike-slip faults which offset the I.F. The deposit consists of an isoclinal fold plunging steeply to the north. It is irregular in outline as the result of a complex history of steeply folding, refolding, and faulting. Magnetite and quartz are the most common mineral phases, hematite also occurs. The Southern part has been intruded by granite its depth projections are uncertain.

(Applies to: mineralization) Western Melville Peninsula hosts metamorphosed Algoma-type iron formation deposits within the Archean Prince Albert Group greenstone belt. The orebodies occur within a zone that extends for approx 15 miles in length. Five deposits, Numbers 1 to 5, (plus subdivisions) have been outlined. Magnetite, with minor specularite and quartz, are the main minerals in the iron formation of Deposits 1, 2, 4, and 5. The deposits contain an estimated combined tonnage of 3.3 billion long tons, based on surface sampling (not drilling). The Borealis 5 deposit has been subdivided into North, Central and South and consists of an isoclinal fold plunging steeply to the north. The deposit as a whole outcrops over 10,000 feet, and is up to 1,800 feet thick.The Southern Zone has an average width of 600 feet and a length of 4200 feet.
Links to other databases: NUMIN; Key value: 047BSE0027
NMI; Key value: 47 B 02 Fe 1
Geophysical-chemical signature: Signature type: Airborne Magnetometer; Response type: positive (strong)
Signature type: Ground Magnetometer; Response type: positive (strong)
References:
Anonymous, 1982
Preliminary Feasibility Study, Borealis Roche Bay Magnetite Project (062133)
Mineral Assessment Report, Borealis Exploration Ltd; Scott-Ortech Mining Ltd (operator), Indian and Northern Affairs Canada, Publication code 062133

Scruggs, G. G., 1977
Geology and Research of all Borealis Claims, Melville Peninsula (080645)
Mineral Assessment Report, Borealis Exploration Ltd, Indian and Northern Affairs Canada, Publication code 080645

Underhill, D. H., 1969
Report for Borealis Exploration Limited on Mineral Exploration on Permits 47B2 and 47A5 and 6, Melville Peninsula A (019503)
Mineral Assessment Report, Borealis Exploration Ltd, Indian and Northern Affairs Canada, Publication code 019503

Underhill, D. H., 1970
Report on the 1970 Mineral Exploration Program, Melville Peninsula (060744)
Mineral Assessment Report, Borealis Exploration Ltd; UnderhillDH (Norman H. Ursel Associates Ltd) (operator), Indian and Northern Affairs Canada, Publication code 060744

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: 1977; Component: mineralization zone; 331 million long tons ore; Combined with production?: no; Provisional entry?: yes; Resource category: geological resource
Reference: Scruggs, G. G., 1977: Geology and Research of all Borealis Claims, Melville Peninsula (080645); Mineral Assessment Report, Borealis Exploration Ltd, Indian and Northern Affairs Canada, Publication code 080645
Percent weights allocated to deposit: 100.0%

Generated 2014-09-03 13:02:27 with GQuery -- 3.7 ADO (3.19..3.22 -- 2008-12-16)
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