Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000000331

Record: MDI000000000331


Mineral Record Identification
Record Name(s) Anomaly T - 2000
Related Record Type
Related Record(s)
Record Status Occurrence
Date Created 2007-Jun-21
Date Last Modified 2022-Jun-08
Created By
Revised By


Primary Commodities: Gold


Township or Area: Duffell Lake Area

Latitude: 51° 12' 44.63"    Longitude: -90° 49' 53.67"

UTM Zone: 15    Easting: 651453.998   Northing: 5675678.998    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 52O02NW

Point Location Description: ddh database location for ddh 00-15.

Location Method: Data Compilation

Exploration History

1988-2001: Prospecting, trenching, geological and geophysical surveys and diamond drilling by E.W. Bazinet, Milner Consolidated Silver Mines and Iron Lake Minerals.

Assessment Work on File

Assessment Work on File
Office File Number Online Assessment File Identifier Online Assessment File Directory
2.16770 52O02NW0010 52O02NW0010
2.23687 52O02NW2007 52O02NW2007
2.20788 52O02NW2006 52O02NW2006


Province: Superior

Subprovince: Uchi

Terrane: North Caribou

Domain: Uchi

Belt: Meen-Dempster

Geological Age: Neoarchean  


Lithology Data
Rock Type Rank Composition Texture Relationship
Amphibolite 1 Banded Amphibolite Contains
Chert 2 Possibly Lean Iron Formation Near
Porphyry-unsubdivided 3 Near


Mineralization and Alteration
Rank Mineral Name Class Economic Mineral Type Alteration Mineral Type Alteration Ranking Alteration Intensity Alteration Style

Mineralization Comments

Jun 21, 2007 (Mark Puumala) - Bazinet (1995) reported assays of up to 0.04 oz/ton Au in samples collected from a series of trenches excavated at this location over a strike-length of approximately 200 m along an approximately east-west-striking magnetic anomaly (Anomaly T). The material exposed during this trenching was reported by Bazinet (1995) to consist of sheared rock consisting of bands of chert and amphibole (iron formation?). This rock was generally reported to be highly-weathered, with abundant limonite staining. In trenches where sulphide mineralization was observed, Bazinet (1995) indicates the presence of disseminated to massive arsenopyrite. Diamond drilling at this location by Iron Lake Minerals (ddh 00-15) is reported by Bazinet (2000) to have intersected a series of amphibolitized tuffs and possible exhalative sediments (chert) intruded by a feldspar porphyry dike. Anomalous gold assays (up to 0.498 g/ton Au over 1.14 m) were reported from sections that encountered mineralization consisting of disseminated pyrrhotite with minor arsenopyrite. Lower gold assays were reported to have been obtained from sections that were only mineralized with pyrrhotite. This occurrence is located approximately 3 km east-southeast of the Anomaly A prospect, and may represent an extension of the same mineralized horizon.

Mineral Record Details

1 Lode (Gold)
Rank Characteristic            
1 Sheared

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Ministry Contact Information

For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office