Mineral Deposit Inventory for Ontario

Ministry of Energy, Northern Development and Mines

Deposit: MDI000000002477

General

Commodities

Primary Commodities: gold

Location

Township or Area: Elmhirst

Latitude: 49° 45' 21.37"    Longitude: -87° 42' 14.58"

UTM Zone: 16    Easting: 449288   Northing: 5511733    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 42E13SE

Point Location Description: DDH MUD07-03 from Assessment report 20000003447

Location Method: data compilation

Access Description: The property is accessible by travelling north along Highway 801 (Paint Lake Road) from Highway 11 for 13.6 km to the Namewaminikan (Sturgeon) River Bridge, then proceeding east on the Sturgeon River Road for 8.2 km. At this point, a tractor road traverses south for 1 km to the main stripped area comprising the occurrence.

Exploration and Mining History

1930s: the area was explored and trenched during the gold rush to the area. 1981: Mattagami Lake drilled 2 DDH totaling 185 m. 1989: Noranda Exploration Company Ltd. conducted prospecting and geological mapping. 1995: Edda Resources carried out stripping and sampling. 1998: F. Houghton, P. Houghton, and L. Clarke carried out prospecting, stripping, trenching, and VLF-EM surveys. 2005: Alto Ventures conducted an IP survey, geological mapping, and sampling. 2007: Alto Ventures carried out prospecting, stripping, sampling, and drilled 5 DDH totaling 276 m. 2008: Alto Ventures carried out stripping, mapping, and sampling. 2009: Alto Ventures carried out prospecting and sampling.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wabigoon

Belt: Onaman

Intrusion: Coyle Lake Stock

Geological Age: Archean   

Geology Comments

12/18/2020 (T Pettigrew) - The property is located within the south-central portion of the Onaman-Tashota metavolcanic belt, which is part of the eastern Wabigoon Subprovince. This region of Elmhirst Township is underlain by a thick succession of intermediate to felsic metavolcanic rocks, mainly of pyroclastic origin, which have been intruded by a medium-grained granodiorite to diorite body known as the Coyle Lake stock. The Coyle Lake stock is one of a group of three early-Precambrian intrusive bodies occupying a 20 km area immediately north of the Paint Lake fault. A major structural feature, first identified by Mackasey and Wallace (1972) and here named the Coyle Lake fault traverses the southeast portion of the Coyle Lake stock. The fault mimics the regional northeast structural trend and offsets the contact of the Coyle Lake stock in the Mud Lake area (Mason et al., 1999).

Mineral Deposit Lithology

Mineralization

Mineralization Comments

12/18/2020 (T Pettigrew) - DDH MUD07-01 returned 0.902 ppm Au over 1 m from a quartz-chlorite vein within a shear zone. The vein is made up of 60% milky white quartz alternating with chlorite, sericite and locally tourmaline. Fine pyrite forms 3% and occurs scattered within the chlorite-sericite areas and trace amounts of very fine chalcopyrite occur within the quartz. DDH MUD07-03 returned 3.25 g/t Au over 0.7 m from a quartz vein (Assessment report 20000003447). Samples collected in 2005 returned up to 5.708, 15.806, and 19.814 ppm Au from quartz veins with pyrite (Assessment report 20000001185).

References

Publication - Thunder Bay North (Beardmore-Geraldton) District – 1998; In: Report of Activities, 1998, Resident Geologist Program, Thunder Bay North Regional Resident Geologist Report, p. 14-16

Publication Number: OFR5988    Date: 1999

Author: Mason, J.K., White, G.D., O’Brien, M.S., Walden, A., Komar, C.

Publisher Name: OGS

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Ministry Contact Information

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