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 - 3 East Limb (occurrence); West Melville Iron Deposits (occurrence)
Longitude / Latitude: -85.48650 / 68.19400
Political location(s): Canada; Province or state: Nunavut; Subprovince or locality: Melville Peninsula
NTS map data: 047B02 (Folster Lake)
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 based on surface areas determined by planimeter - 77 million long tons for West Limb and 54 million long tons for East Lmb; hematitic ore - 131million 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)
Geological ages: Archean (mineralization)
Archean (host rocks)
Host rocks: (1) sedimentary; iron formation; Depositional setting: shallow marine
External host rock forms:tabular sedimentary body
Internal host rock structures:massive
Individual lithologies:iron formation - oxide
Host rock stratigraphy:Prince Albert group
Metallogenic signatures: Fe
Mineralogy: (mineralization - massive / mineralization zone): magnetite, hematite, quartz, specularite
Deposit shape: tabular; Component: mineralization zone
Deposit dimensions:width: 76 metres
length: 1,373 metres
Qualified comments: (Applies to: location ) The location of the deposit was taken from AR 060744 Figure 11 (Geologic map of the vicinity of Borealis 1,2 and 3 iron formation occurrences).

(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. Hematite is the principal iron oxide in Deposit 3 West Limb , while both magnetite and hematite occur in 3 East Limb. The East Limb of Deposit 3 consists of a near vertically dipping slab of iron formation that averages at least 250 feet in width over a length of 4,500 feet. The East Limb is partially covered on the surface by 230 m wide younger quartzite.

(Applies to: reserve/resource descriptions) Borealis 3 has 2 zones: 1) West Limb (Q) and 2) East Limb. There is no grade data and no samples taken from the East Limb. The ore is hematitic and estimated to be 131 million long tons, which is subtracted from the total tonnage of Borealis 1, 2, 3, 4 and 5.

(Applies to: property geology) The east flank of the Borealis 3 deposit has the form of a vertically dipping slab, partially masked by glacial drift and thin (probably 20 ft) cover of Proterozoic quartzite, calc-silicate and marble lying unconformably on the iron formation. The I.F. (almost vertical dips) is intermittently exposed because of the moderate 10-60 dip of the Proterozoic sediments.
Links to other databases: NUMIN; Key value: 047BSE0025
NMI; Key value: 47 B 2 Fe 1
Geophysical-chemical signature: Signature type: Airborne 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., 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; 54 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 13:02:26 with GQuery -- 3.7 ADO (3.19..3.22 -- 2008-12-16)
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