CANADIAN AND WORLD MINERAL DEPOSIT DATABASES
Geological Survey of Canada


Deposit number Country Location Names Commodities
20106 Canada (Nunavut) 71.27.40 N -- 079.51.50 W Mary River - No. 4 Fe
 
Database name: Canadian Iron Formation
Custodial agency: Geological Survey of Canada
Compilers: G. A. Gross and E. M. Hillary
Release date: 2014-10-01
   
Deposit name(s): Mary River - No. 4 (occurrence)
Political location(s): Canada; Province or state: Nunavut; Subprovince or locality: North Baffin Island
NTS map data: 037G05
Deposit clan (type): iron formation
Deposit (sub) types: Algoma type; Reference: Watts Griffis and McOuat Ltd., 1983: A Summary Report on the Mary River Deposit of Baffinland Iron Mines Ltd. (062161); Mineral Assessment Report, Baffinland Iron Mines Ltd., Indian and Northern Affairs Canada, Publication code 062161
Deposit status: advanced project; Size category: significant; Status comments: Estimated reserves (1966) 46 million tons of 66.84 % up to 350 ft of open pit depth. Of this, 1/3 is high grade magnetite lump and rest is micaceous specular hematite and finely granular magnetite.
Geologic province: Canadian Shield
Geologic subprovince: Rae craton
Geologic district: Committee belt
Deposit object located: centre of mineralized zone
Commodities: Fe
Mineralization styles: stacked lenses
Geological ages: Archean (host rocks)
Host rocks: (1) sedimentary; iron formation; Metamorphic grade: amphibolite - lower; Component: mineralization zone
External host rock forms:tabular sedimentary body
Internal host rock structures:massive
granular
Individual lithologies:iron formation - oxide
Host rock stratigraphy:Mary River group
Mineralogy: (mineralization / mineralization zone): specularite
(mineralization - massive / mineralization zone): magnetite
Deposit shape: multiple lenses; Component: mineralization zone
Deposit dimensions:length: 7,800 ft
width: 250 ft
Qualified comments: (Applies to: mineralization) The deposit has an known strike length of 7800 feet and the width varies from 50 feet to >250 feet. The high grade zone represent 4 elongated lenses of contrasting mineralogy and texture. One third of the reserves is high grade magnetite lump, the remainder is friable mixture of granular to coarse micaceous specular hematite and less finely granular magnetite.

(Applies to: reserve/resource descriptions) Estimated reserves (1966) 46 million tons of 66.84 % up to 350 feet of open pit depth. Of this 1/3 is high grade magnetite lump and rest is micaceous specular hematite and finely granular magnetite. The orebody coincides with a strong magnetic anomaly, which extends farther along the strike that increases the possibility of additional high grade tonnage.

(Applies to: location and access) Deposit 4 is located 15 miles NW of Deposit 1 and 1 miles east of the proposed haulage route to the coast at Milnet Inlet. The deposit outcrops at an elevation of about 1000 feet above sea level.
Links to other databases: NUMIN; Key value: 037GSW0010
Geophysical-chemical signature: Signature type: Airborne Magnetometer; Response type: positive (very strong)
Signature type: Ground Magnetometer; Response type: positive (very strong)
References:
Gross, G. A., 1966
The origin of high grade iron deposits on Baffin Island, N.W.T.
Canadian Mining Journal, Volume 87, p. 111 - 114

Hahn, J., 1966
Feasibility Study and Cost Estimate, Baffinland Iron Mines Limited, Mary River Area, Franklin (062243)
Mineral Assessment Report, Baffinland Iron Mines Limited, Indian and Northern Affairs Canada, Publication code 062243

Neczkar, E.; Westervelt, R. D., 1963
Engineering Field Report No 1 on Mary River Iron Deposits (017056)
Mineral Assessment Report, Baffinland Iron Mines Ltd, Indian and Northern Affairs Canada, Publication code 017056

Sangster, D. F., 1998
Mineral deposits compilation and metallogenic domains, northern Baffin Island and northern Melville Peninsula, Northwest Territories
Geological Survey of Canada, Open File 3635, Scale 1:1000000

Watts Griffis and McOuat Ltd., 1983
A Summary Report on the Mary River Deposit of Baffinland Iron Mines Ltd. (062161)
Mineral Assessment Report, Baffinland Iron Mines Ltd., Indian and Northern Affairs Canada, Publication code 062161

Associated group(s): Mary River Iron Deposits (33)

Generated 2014-10-01 11:15:11 with GQuery -- 3.7 ADO (3.19..3.22 -- 2008-12-16)
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