Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000001974

Record: MDI000000001974

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Richardson

Latitude: 48° 49' 58.13"    Longitude: -94° 0' 56.19"

UTM Zone: 15    Easting: 425468   Northing: 5409368    UTM Datum: NAD83

Resident Geologist District: Kenora

NTS Grid: 52D16SE

Point Location Description: Location from map in 2013 NI 43-101

Location Method: Data Compilation

Access Description: Behind mine gatealong south wall of 350 m deep pit

Exploration History

1988: OGS map P3140 was produced, based on the interpretation of aeromagnetic data and geological mapping carried out by Johns. Mapping was supported by an OGS drill program, which resulted in the discovery of a gold-grains-in-till anomaly. Mingold Resources followed up on this anomaly and staked 85 claims and optioned patented lands. They did till sampling, including RC drilling, which gave inconclusive results. 1992: Nuinsco optioned patented lands from Western Troy Resources in September. 1993-1998: Nuinsco drilled a total of 597 widely-spaced RC drill boreholes. Nuinsco drilled a total of 217 DDH totalling 49,515 m. 1994: Nuinsco discovered the 17 Zone via core borehole. 1995: Nuinsco discovered the 34 Zone (Cu-Ni-PGE) followed by intensive diamond drilling.1997: Nuinsco discovered the 433 Zone, 500 m north of 17 Zone. 1999: Nuinsco conducted core drilling targeting the 34 Zone and a magnetic anomaly in Tait Township. 2000: Nuinsco conducted an audio magneto-telluric geophysical survey. 2004: Nuinsco drilled 8 DDH totalling 1,549 m into the 34 Zone. 2005: Rainy River Resources completed the acquisition of a 100% interest in the project from Nuinsco in June. Rainy River relogged key sections of historical drill core, created a GIS database, conducted geological mapping, structural modelling and drilled more than 100 RC holes. In addition, 17 DDH were drilled, totalling 3,800 m. 2006: Rainy River drilled 121 DDH, totalling 55,219 m. It was while drilling the ODM-17 zone at deeper depths that anomalous gold values were being encountered within the mafic hanging wall. 2007: Rainy River drilled 179 DDH. JVX Ltd. was contracted to do an IP survey of 9 holes. Abitibi Geophysics was contracted to do ground gravity & EM surveys. Examination of historical trenching exposing the Cap Zone.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wabigoon

Belt: Rainy River

Geological Age: Archean  

Geology Comments

Jul 20, 2016 (Andrew Tims) - The CAP Zone occurs in the hanging wall of the ODM/17 Zone within the upper, predominantly mafic volcanic sequence. The CAP Zone is located approximately 200 m to the south of the ODM/17 Zone and defines a southwest-plunging lens modelled over a strike length of approximately 400 m to a depth of approximately 400 m below surface. Higher-grade gold mineralization is associated with deformed quartz-ankerite-pyrite shear and extensional veins hosted by quartz-ankerite-pyrite altered mafic volcanic rocks. Relative to ODM/17 and 433 Zones, the CAP Zone has a higher pyrite-chalcopyrite content.On the surface, the Zone is associated with a number of quartz-carbonate vein sets and south-dipping shear zones. The latter post-date the foliation and dip both more steeply and more shallowly than the south-dipping foliation. The orientation of the quartz-carbonate veins is highly variable. North-east to north-west striking sulphide veinlets anastomose across several surface outcrops.

Lithology

Mineralization

Mineralization Comments

Jul 20, 2016 (Andrew Tims) - In core individual high-grade gold intersections are associated with increased sulphide mineralization (particularly chalcopyrite) within and adjacent to shear Zone hosted quartz-carbonate veins. Low-grade gold mineralization in intermediate rocks within the CAP Zone is similar to the ODM/17 Zone, with a noticeably shallower plunge to the south-west. On north-south vertical sections, highgrade gold intersections are aligned along south-dipping planes. In plan view, high-grade gold intersections show continuity along a west-north-west strike. Low-grade mineralization shows good continuity when observed in cross-sections oriented perpendicular to the slightly shallower plunge.

Nov 25, 2019 (Therese Pettigrew) - The Cap Zone is located approximately 200 metres to the south of the ODM/17 Zone and defines a southwest-plunging lens modelled over a strike length of approximately 400 metres to a depth of approximately 400 metres below surface. Higher grade gold mineralization is associated with deformed quartz-ankerite-pyrite shear and extensional veins hosted by quartz-ankerite-pyrite altered mafic volcanic rocks. Relative to ODM/17 and 433 Zones, the Cap Zone has a higher pyrite-chalcopyrite content. The Cap Zone occurs in the hanging wall of the ODM/17 Zone within predominantly mafic volcanic rocks. On surface the zone is associated with a number of quartz-carbonate vein sets and south-dipping shear zones. These post-date the foliation and were observed to dip both steeper and more shallowly than the south-dipping foliation. North-northeast-striking sulphide veins also cross the surface outcrop. Individual high gold grade intersections from drill core are associated with increased sulphide mineralization within and adjacent to shear-zone hosted quartz-carbonate veins. Low grade gold mineralization in intermediate rocks within the Cap Zone is similar to the ODM/17 Zone style of low-grade mineralization and plunges to the southwest the same as the overall ODM/17 Zone. On north-south vertical sections, high gold grade intersections are best aligned along variably south-dipping planes and broader zones of lower grade mineralization plunge to the southwest similar to the ODM/17 Zone (Cole et al., 2011). DDH NR121256 intersected 1.1 g/t Au and 5.1 g/t Ag over 9.0 metres at a vertical depth of 734 metres and 1.9 g/t Au and 7.5 g/t Ag over 3.8 metres at a vertical depth of 774 metres within the Cap Zone. DDH NR121270 returned 4.7 g/t Au and 21.2 g/t Ag over 8.1 metres at a vertical depth of 419 m. DDH NR121225 returned 1.9 g/t Au and 8.4 g/t Ag over 4.5 metres at a vertical depth of 247 m (Rainy River Resources July 19, 2012 press release).

Mineral Record Details

References

Publication - Feasibility Study of the Rainy River Gold Project, Ontario, Canada

Publication Number: 2013 NI 43-101 Date: 2013

Author: Hardie, C., Runnels, D., Live, P., Daniel, S.E., Ritchie, D.G., Coulson, A.

Publisher Name: Rainy River Resources

Location: SEDAR

Publication - Mineral Resource Evaluation, Rainy River Gold Project, Western Ontario, Canada

Publication Number: 2011 NI 43-101 Date: 2011

Author: Cole, G., El-Rassi, D., Gowans, R.

Publisher Name: SRK for Rainy River Resources

Location: SEDAR

Publication - NI 43-101 Preliminary Economic Assessment Update of the Rainy River Gold Property

Publication Number: 2012 NI 43-101 Date: 2012

Author: Hardi, C., Runnels, D., Daniel, S.E., Ritchie, D.G., Cole, G., El-Rassi, D.

Publisher Name: BBA for Rainy River Resources Ltd.

Location: SEDAR

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For detailed information regarding this mineral record please contact the Kenora Resident Geologist District Office