Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000001975

Record: MDI000000001975

General

Commodities

Primary Commodities: Gold, Silver

Secondary Commodities: Copper

Location

Township or Area: Richardson

Latitude: 48° 50' 25.42"    Longitude: -94° 2' 3.08"

UTM Zone: 15    Easting: 424116   Northing: 5410229    UTM Datum: NAD83

Resident Geologist District: Kenora

NTS Grid: 52D16SE

Point Location Description: Map in Rainy River Feb 2012 corporate presentation

Location Method: Data Compilation

Access Description: Behind mine gate. North of old HWY 600 4.7 km east of Dearlock.

Exploration History

1994: Nuinsco Resources Ltd. conducted IP and magnetic surveys, drilled 51 RC and rotasonic drillholes. 1997: Nuinsco drilled 135 RC holes totalling 3814.4 m and carried out analyses for visible gold grains. 2010: Rainy River drilled 196 DDH totalling 88,615 m, discovering the Western Area mineralization. 2011: Rainy River continued drilling and delineation.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wabigoon

Belt: Rainy River

Geological Age: Archean  

Geology Comments

Jul 20, 2016 (Andrew Tims) - The Western Zone occurs near surface approximately 1 km northwest of the Beaver Pond Zone. Itis composed of stockwork of discrete centimetre scale anastomosing, folded to linear quartz and quartz-carbonate veinlets, hosted predominantly by strongly deformed intermediate volcanic fragmental units, analogous to those that host the ODM/17 Zone, but also present in mafic volcanic flows in both the immediate footwall and hanging wall. The stratigraphy hosting the Western Zone shows a much higher degree of deformation than to the east and combined with intense sericitic alteration and foliation is often described as a pervasive shear fabric or approaching mylonitic texture. The veinlets are variably mineralized, with inclusions (in the order of frequency) of pyrite,anemic sphalerite, chalcopyrite, galena, native silver, electrum and native gold.

Lithology

Lithology Comments

Nov 25, 2019 (Therese Pettigrew) - The Western Zone is composed of stockwork of discrete centimetre scale anastomosing, folded to linear quartz and quartz-carbonate veinlets, hosted predominantly by strongly deformed intermediate volcanic fragmental units, analogous to those that host the ODM/17 Zone, but also present in mafic volcanic flows in both the immediate footwall and hanging wall. The stratigraphy hosting the Western Zone shows a much higher degree of deformation than to the east and combined with intense sericitic alteration and foliation is often described as a pervasive shear fabric or approaching mylonitic texture (Hardie et al., 2012).

Mineralization

Mineralization Comments

Nov 25, 2019 (Therese Pettigrew) - Gold mineralization appears sporadic in the Western Zone of the Rainy River Gold Project, but can be subdivided into at least two (2) stages of mineralization: 1) early (low to moderate-grade) gold mineralization associated with sulphide (pyrite-sphalerite-chalcopyrite-galena) stringers and veins and disseminated pyrite in quartz-phyric volcaniclastic rocks and conglomerate; and 2) late (high-grade) gold mineralization associated with quartz-carbonate-pyrite-gold veins and veinlets and rarely as native gold veins. The veinlets of the Western Zone are variably mineralized, with inclusions (in the order of frequency) of pyrite, anemic sphalerite, chalcopyrite, galena, native silver, electrum and native gold (Hardie, 2012). RC hole RR97-429 returned assays of up to 1.95 ppm Au, 1020 ppm Cu and had visible Au grains (Assessment report 52C13SW0007). DDH NR11719 returned 1,335 g/t Au and 76.7 g/t Ag over 1.5 metres at a depth of 42 m. Other significant holes returned 32 g/t Au and 9.1 g/t Ag over 1.5 metres, 55 metres deep in hole NR11731; and 42.5 g/t Au and 6.3 g/t Ag over 1.0 metre, 114 metres deep in hole NR11718, including 2.0 g/t Au and 92.2 g/t Ag over 1.0 metre, 219 metres deep (Rainy River Resources July 6, 2011 press release) DDH NR11783 intersected 255.0 g/t Au and 11.2 g/t Ag over 1.5 m. Several wider zones of low-grade Au mineralization were also drilled: NR11753 intersected 1.1 g/t Au over 9.0 m, NR11781 intersected 1.1 g/t Au over 4.5 m, NR11782 intersected 2.8 g/t Au over 4.5 m, NR11788 intersected 1.1 g/t Au over 7.5 m, and NR11772 intersected 1.0 g/t Au over 10.5 m. All of these intersections have vertical depths between 93-225 metres below surface (Rainy River Resources Sept 12, 2011 press release).

Mineral Record Details

References

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

Publication Number: 2012 NI 43-101 Date: 2012

Author: Hardie, 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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Ministry Contact Information

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