Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52B10SE00029

Record: MDI52B10SE00029

General

Commodities

Primary Commodities: Gold

Secondary Commodities: Copper, Silver

Location

Township or Area: Burchell Lake Area

Latitude: 48° 36' 19.32"    Longitude: -90° 33' 23.41"

UTM Zone: 15    Easting: 680124.47   Northing: 5386469.98    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 52B10SE

Point Location Description: Precise

Location Method: Data Compilation

Access Description: The Property is approximately 115 km west of Thunder Bay, Ontario via TransCanada Highway 11/17, then Highway 11 and then Highway 802, 2 km west of the village of Kashabowie. The Osmani Gold Deposit is accessed by a series of logging roads from Highway 802.

Exploration History

1952-55: Coldstream Copper Mines Ltd. conducted mapping and drilling. 1987: Noranda conducted prospecting, line cutting, humus and soil sampling, preliminary geological mapping, IP and magnetometer surveys, trenching and channel sampling. Discovered the North, East and Main Zones. Lacana Exploration conducted geological mapping, trenching, prospecting, and VLF, IP and magnetic surveys. Defined Sander’s Zone. 1988: Noranda conducted diamond drilling totalling 1200 m, max/min survey, lithogeochemistry and geological mapping. 1989: Noranda conducted 900 m of diamond drilling, trenching, channel sampling and a magnetometer survey. Lacana drilled 5 DDH into Sander’s Zone. 1990: Independence Mining optioned the property from Lacana conducted line cutting, mapping and sampling. Noranda conducted almost 1500 m of diamond drilling. 1991: Noranda conducted 2600 m of diamond drilling targeting the Main zone. Independence Mining pulled out of Canada and returned the property to Lacana. T. Sanders conducted prospecting, sampling and limited mapping. 2002: Alto Ventures acquired the property. Alto Ventures and Kinross Gold Corp drilled 7 DDH totalling 1668 m in a joint venture. 2005: Alto Ventures conducted airborne and ground geophysics, VTEM survey and IP survey. 2006: Alto Ventures drilled 13 DDH totalling 2062 m and resampled some historic holes. 2007: Alto Ventures trenched and sampled IP targets south of the Sanders Zone. 2009: Alto Ventures and Foundation Resources entered into an agreement to have Foundation earn into the property. Foundation conducted mapping and sampling on Sanders Zone. 2010: Foundation conducted an IP survey and sampling and drilled 36 DDH totalling 9725 m. 2011: Foundation Resources drilled 20 DDH totalling 7263 m and finished the work commitments to earn 100% of the Coldstream property. 2012: Foundation renamed to Coldstream Mineral Ventures Corp. 2013: Coldstream renamed to Birch Hill Gold Corp. 2014: Birch Hill and Canoe Mining merge to form Canoe Mining Ventures Corp. 2016: Wesdome Gold Mines purchased the Hamlin and Coldstream properties from Canoe Ventures Corp. Grid cutting and IP surveys were completed over the OGD as well as 4 00 m of diamond drilling.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wawa

Terrane: Wawa-Abitibi

Belt: Shebandowan

Geological Age: Archean  

Geology Comments

Aug 27, 2015 (Therese Pettigrew) - The North Coldstream-Span-Moss shear zone is a significant northeast-striking regional structure that extends through the Property. The structure is identified as a corridor of variably deformed and altered rocks (sericite, silica, hematite-magnetite, potassium assemblages) of significant strike length. It hosts significant gold and copper-gold mineralization, both on and adjacent to the Property. An intensely altered (silicification) and deformed gabbroic sill-like body hosting copper-gold mineralization at the past producing North Coldstream Mine is located on the Property approximately 2 km west of the Osmani Gold Deposit. Within the regional context, the North Coldstream copper-gold deposit is situated at the contact of felsic-mafic metavolcanic rocks (McCracken, 2011).

Lithology

Lithology Comments

Aug 27, 2015 (Therese Pettigrew) - The Property is underlain by Archean mafic and intermediate to felsic metavolcanic rocks which have been intruded subconcordantly to concordantly by numerous sills and dikes of gabbro, diorite, quartz, and quartz-feldspar porphyries. The mafic metavolcanics and associated synvolcanic gabbroic intrusions dominate the northeastern portion of the Property, felsic to intermediate metavolcanic rocks being the most predominant lithologies in the central and southwestern parts of the Property. Syn- to post tectonic composite granitoid plutons bound the Coldstream claims on virtually all sides (McCracken, 2011).

Mineralization

Mineralization Comments

Aug 27, 2015 (Therese Pettigrew) - The Property hosts several gold and copper-gold deposits, which are roughly aligned along the North Coldstream Shear Zone-Span-Moss Shear Zone, identified by a northeastsouthwest-trending mineralized corridor/structure. This structural corridor is characterized by variably altered, schistose and mineralized host rocks. The most significant mineralization on the Property is contained within the North Coldstream (copper-gold) and Osmani (gold) deposits, which occupy roughly one-third of the mineralized corridor. Mineralization is predominantly associated with sheared and altered mafic to intermediate metavolcanic rocks as well as quartz and quartz-feldspar porphyries. The mineralized metavolcanic rocks are typically both bounded and intruded by the porphyries. The mineralized rocks are variably schistose, silicified, carbonatized,oxidized and locally display strong to intense iron-carbonate and hematite alteration. Sulphide mineralization occurs in both the metavolcanics and porphyry rocks as disseminations and seams along the schistosity planes within and/or adjacent to shear zones. Significant assays from the 2010 drill program include: DDH C-10-15: 4.88 g/t Au over 27.28 m; DDH C-10-16: 1.12 g/t Au over 111.3 m; DDH C-10-25: 3.06 g/t Au over 13 m; DDH C-10-32: 1.84 g/t Au over 34.8 m; DDH C-10-39: 2.1 g/t Au over 35.65 m; DDH C-10-49: 1.01 g/t Au over 49.9 m. Significant assays from the 2011 drill program include: DDH C-11-66: 1.10 g/t Au over 38.25 m; DDH C-11-62: 1.06 g/t Au over 16 m; DDH C-11-62: 1.04 g/t Au over 23 m, DDH C-11-71: 8.26 g/t Au from 186.5-189.85 m; DDH C-11-75: 11.65 g/t Au from 172.65-174 m and 10.95 g/t Au from 197-199 m (McCracken, 2011) .

Mineral Record Details

Mineral Zones - Size and Shape

References

MonoMap - Geology of the Burchell Lake area, District of Thunder Bay

Publication Number: R019 Page: 35  Date: 1997

Author: Giblin P.E.

Publisher Name: Ontario Dept. of Mines

Location:

Press Release - Goldshore Announces an Indicated Mineral Resource Estimate of 1,535Koz Contained Gold at 1.23 g/t Au and an Inferred Mineral Resource Estimate of 5,198Koz Contained Gold at 1.11 g/t Au at the Moss Gold Project

Publication Number: Press Release Page: 2  Date: 2024

Author: Dufresne, M., Black, W.

Publisher Name: Goldshore Resources Inc.

Location: SEDAR

Book - Coldstream Property, West Shebandowan Greenstone Belt, Burchell Lake area, Technical report, 87p.

Publication Number: 2009 43-101 Date: 2009

Author: I.A. Osmani

Publisher Name:

Location:

Book - Technical Report and Resource Estimate on the Osmani Gold Deposit, Coldstream Property, Northwestern Ontario

Publication Number: 2011 43-101 Date: 2011

Author: McCracken, T.

Publisher Name: Wardrop for Alto Ventures and Foundation Resources

Location: SEDAR (under Coldstream Mineral Ventures

Map - Burchell Lake area, Thunder Bay District

Publication Number: M2036 Scale: 1:31,680    Date: 1997

Author: Giblin P.E.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Precambrian Geology, Burchell-Greenwater Lakes Area, West Half

Publication Number: M2622 Scale: 1:20,000    Date: 1997

Author: Osmani I.A.

Publisher Name: Ontario Geological Survey

Location:

Map - Precambrian geology, geology and mineral potential of the western Greenwater Lake area

Publication Number: OFM0202 Scale: 1:15,840    Date: 1992

Author: Osmani I.A.

Publisher Name: Ontario Geological Survey

Location:

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