Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42E03SW00042

Record: MDI42E03SW00042

General

Commodities

Primary Commodities: Gold

Secondary Commodities: Copper, Molybdenum

Location

Township or Area: Rope Lake Area

Latitude: 49° 0' 19.41"    Longitude: -87° 17' 27.15"

UTM Zone: 16    Easting: 478727   Northing: 5428096    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 42E03SW

Point Location Description: Trench 06-05 from Assessment file 20000002793

Location Method: Data Compilation

Access Description: The occurrence is located approximately 200 metres west of the northwest end of Big Duck Lake, 27 km north of Schreiber (claim map G-617). Easiest access is by aircraft from Pays Plat to Big Duck Lake. A drill trail leads from the Winston Lake Mine site to Big Duck Lake.

Exploration History

1983-1987: Geological, geophysical and geochemical surveys and diamond drilling; Corporation Falconbridge Copper. An old pit was discovered at this time by CFC employee B. Nelson. Sampling of the pit indicated the presence of gold mineralization. 1985: Property examination and lithogeochemical sampling; OGS Resident Geologist staff. 1990: Ground geophysical survey (IP); Thesis work; D. Ritcey. 1993: Diamond drilling (10 holes); Metall Mining Corporation and Rusty Lake Resources. The drilling focused on the Nelson Pit and Coco-Estelle occurrences. 1996: Battle Mountain Canada Inc. relogged and sampled historic drill core. 1997: Battle Mountain conducted an IP survey. 2006: Tri Gold Resources Corp. conducting trenching, sampling, and drilled 3 DDH totalling 463 m.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wawa

Terrane: Wawa-Abitibi

Belt: Schreiber-Hemlo

Geological Age: Archean  

Geology Comments

Dec 07, 2005 (D McKay) - Schnieders et al. (1996) describe the geology as follows: The area is underlain by mafic metavolcanic flows and tuffs which have been intruded by quartz porphyry. Mafic intrusive rocks are also present and an east-west structure transects the area. The Nelson Pit zone is hosted by a sheared and altered QFP, which includes fragmental QFP material which is hosted by a mafic to biotitic matrix.

Lithology

Mineralization

Mineralization Comments

Dec 07, 2005 (D McKay) - Lewis (1993, assessment files) described the mineralization as follows: An east-west trending structure is adjacent to and within the main QFP. The auriferous zone exhibits strong foliation, sericite and chlorite alteration, patchy silicification and fairly consistent 3-5% Py and trace Cpy. The pyritized zone encompasses a narrow pseudo-fragmental rock resulting from partial alteration. From the longitudinal section (Lewis 1993, assessment files) the Nelson Pit zone has been drilled over a strike length of 325 m and down to a vertical depth of 200 m. The longitudinal section shows 7 diamond drill holes on the Nelson Pit Zone. The best intersection was from hole BD-46 which intersected 4.42 g/t Au over 5.5 m including 7.14 g/t Au over 3.15 m. Hole BD-60 intersected 0.70 g/t Au across 13.5 m (Lewis 1993, assessment files). Grab samples from the Nelson Pit Zone assayed up to 4.12 g/t Au (Lewis 1993). The longitudinal section shows 7 diamond drill holes on the Nelson Pit Zone. The best intersection was from hole BD-46 which intersected 4.42 g/t Au over 5.5 m including 7.14 g/t Au over 3.15 m. Hole BD-60 intersected 0.70 g/t Au across 13.5 m (Lewis 1993).

Jun 13, 2019 (Therese Pettigrew) - Sample 214909 from DDH BD06-16 assayed 1.439 g/t Au, 4598 ppm Cu and 97 ppm Mo over 0.20 m. DDH BD06-17 returned values of 0.361 g/t Au, 1305 ppm Cu, and 18.9 ppm Mo over 13.5 m, and 1.783 g/t Au and 866 ppm Cu over 1.5 m (Assessment file 20000002793). Battle mountain found gold mineralization beneath the Nelson Pit area with values of up to 3.25 g/t Au over 3.15 m within an anomalous gold zone grading 0.77 g/t Au over 24.7 m (Assessment file 42E03SW0010).

Alteration Comments

Dec 07, 2005 (D McKay) - According to Lewis (assessment files, 1993): The auriferous zone exhibits strong foliation, sericite and chlorite alteration, patchy silicification and fairly consistent 3-5% Py and trace Cpy.

Mineral Record Details

References

Map - Nipigon-Schreiber, geological compilation series, Thunder Bay District

Publication Number: M2232 Scale: 1:253,440    Date: 1973

Author: Carter M.W., McIlwaine W.H., Wisbey P.A.

Publisher Name: Ontario Division of Mines

Location:

Mono - Mineral Occurrences in the Nipigon-Marathon Area, Volumes 1 and 2.

Publication Number: OFR5951 Page: 844-846  Date: 1996

Author: Schnieders B.R., Smyk M.C., Speed A.A., McKay D.B.

Publisher Name: Ontario Geological Survey

Location:

Map - Big Duck Lake area, District of Thunder Bay

Publication Number: M2023 Scale: 1:15,840    Date: 1997

Author: Pye E.G.

Publisher Name: Ontario Dept. of Mines

Location:

MonoMap - Mineral deposits of the Big Duck Lake area, District of Thunder Bay

Publication Number: R027 Date: 1997

Author: Pye E.G.

Publisher Name: Ontario Dept. of Mines

Location:

File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files

Publication Number: Min Dep Date:

Author:

Publisher Name:

Location: Thunder Bay RGP

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