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 Central Zone (occurrence); West Melville Iron deposits (occurrence) |
Longitude / Latitude: |
-85.27971 / 68.37055 |
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 based on surface areas determined by planimeter - 3 zones (North, Central and South), total potential tonnage 1,406 million long tons (Ref ID 2688) |
Geologic province: |
Canadian Shield |
Geologic subprovince: |
Rae craton |
Deposit object located: |
sample location |
Commodities: |
Fe |
Mineralization styles: |
stratiform (mineralization zone) |
Geological ages: |
Archean (host rocks) Archean (mineralization) |
Tectonic setting: |
greenstone belt (host rocks) |
Coincident features: |
conglomerate |
Host rocks: |
(1) sedimentary; iron formation; Depositional setting: shallow marine; Metamorphic grade: amphibolite - lower; Component: mineralization zoneExternal 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; unclassified intrusive rocks; Component: mineralization zoneIndividual lithologies: | granite | External igneous rock forms: | pluton |
|
Metallogenic signatures: |
Fe |
Mineralogy: |
(mineralization / mineralization zone): hematite (mineralization - massive / mineralization zone): magnetite, quartz |
Deposit shape: |
tabular; Component: mineralization zoneDeposit dimensions: | width: 183 metres length: 305 metres width: 395 metres length: 1,430 metres width: 183 metres length: 1,280 metres thickness: 228 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: 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 Central Zone has an average width of 1300 feet and a length of 4700 feet.
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.
(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 metric tons (Ref ID 2688). Individually: Northern - 85 million metric tons of 38% soluble iron and 36.6% magnetic iron; Central - 990 million metric tons. Southern - 331 million metric tons of total iron, this zone has not been sampled.
(Applies to: rock analysis and sample assays) Channel sampling of the Central part of the Borealis - 5 assayed 31.2 % magnetic Fe fraction and 34.3 % soluble Fe fraction of the sample. |
Links to other databases: |
NUMIN; Key value: 047BSE0005 NMI; Key value: 47 B 02 Fe 1 |
Geophysical-chemical signature: |
Signature type: Airborne Magnetometer; Response type: positive (very strong) |
Samples data: |
(1) Sample type: channel; Sample description: Soluble and magnetic Fe fractions of samples; Collector: ScruggsCommodities and grades in order of importance: | Fe (magnetic): 31.2 percent Fe (soluble): 34.3 percent | Reference number: 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 |
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; 1,406 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% |