Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52M01SE00007

Record: MDI52M01SE00007

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Todd

Latitude: 51° 3' 4.73"    Longitude: -94° 8' 49.32"

UTM Zone: 15    Easting: 419603   Northing: 5656157    UTM Datum: NAD83

Resident Geologist District: Red Lake

NTS Grid: 52M01SE

Point Location Description: Most westerly triangle marked Au on OGS map P1052 part of a cluster of 5 in area north of claim KRL7

Location Method: Conversion from MDI

Access Description: Access to the site is by means of the Pine Ridge forest access road along the north side of Red Lake to the Mount Jamie Mine. A 2 km trail leads south from the Mount Jamie Mine to the Heath prospect.

Exploration History

1936-37: Dupont-Hodgson Syndicate carried out prospecting, stripping, trenching and about 120 m of diamond drilling. 1944-46: Heath Gold Mines Limited carried out extensive stripping, plus a 63.5 ton bulk sample program and geological mapping. 1979: Danny Rivard. 1981: O’Brien Rivard drilled one diamond drill hole totalling 132 m. 1984: D. Rivard drilled 2 DDH totalling 117.9 m. 1988: Canamax Resources Inc. collected grab samples. 1994: Inmet Mining Ltd. collected grab samples also channel samples. 2002: Rubicon Minerals carried out prospecting, grab and channel sampling, mapping, a resistivity survey, and drilled 23 DDH totalling 7317 m. 2006: E-Energy Ventures optioned the property and carried out channel sampling, stripping, a ground magnetometer survey, geological mapping, and drilled 11 DDH totalling 1047 m.

Assessment Work on File

Geology

Province: Superior

Subprovince: Uchi

Terrane: North Caribou

Domain: Uchi

Belt: Red Lake

Geological Age: Archean  

Metamorphism Type: Regional

Metamorphism Grade: U. GS-Amphib

Geology Comments

Dec 07, 2005 (K R Kettles) - GEOLOGICAL DESCRIPTION: This area is largely underlain by felsic tuff and a felsic breccia that is up to 2 m thick. Bedding strikes about N25deg.E and dips 65 deg.E; stratigraphic tops are to the southeast. The felsic breccia unit is a good stratigraphic marker that has been traced over 600 m on this property and that continues into TD 18. The felsic breccia is underlain by mafic or ultramafic rock that is brecciated and strongly altered to carbonate and fuchsite and, in places, by a quartz porphyry sill or dyke. The rocks are penetratively foliated in an east-west direction. Gold mineralization occurs mainly along the NW side of the felsic breccia, being comprised of quartz-tourmaline veinlets in the felsic rocks and quartz-carbonate veinlets in the carbonatized mafic rocks. The veinlets strike N-NW and are typically less than 5 cm wide, but up to 30 m long. Gold also occurs in carbonated, pyritic patches of the mafic rocks. Systematic diamond drilling to the east of the felsic breccia by Heath Gold Mines Limited (1946) (for which logs are mostly unavailable), suggest gold may occur in the tuff overlying the breccia. Available drill log information does indicate gold in carbonate rock 670 m east of the breccia (TD 18). DEPOSIT DESCRIPTION: Auriferous quartz veins and gold-bearing altered rock occur over a width of about 40 m and strike length of about 600 m, along a unit of felsic breccia. Bulk sampling indicated an ore zone 186 m long and 4.7 m wide (St. Paul 1946).

Oct 30, 2020 (Therese Pettigrew) - Exposures on the property are interpreted to represent the contact between the Ball and Slate Bay assemblages. The contact represents an erosional unconformity, where felsic and ultramafic units of the underlying Ball volcanic edifice were eroded in an interpreted fluviatile environment (Lichtblau et al., 2007).

Lithology

Lithology Comments

Dec 07, 2005 (K R Kettles) - The felsic breccia unit is a good stratigraphic marker that has been traced over 600 m on this property and that continues into TD 18. The felsic breccia is underlain by mafic or ultramafic rock that is brecciated and strongly altered to carbonate and fuchsite and, in places, by a quartz porphyry sill or dyke. The rocks are penetratively foliated in an east-west direction. Gold mineralization occurs mainly along the NW side of the felsic breccia, being comprised of quartz-tourmaline veinlets in the felsic rocks and quartz-carbonate veinlets in the carbonatized mafic rocks. The veinlets strike N-NW and are typically less than 5 cm wide, but up to 30 m long. Gold also occurs in carbonated, pyritic patches of the mafic rocks.

Oct 30, 2020 (Therese Pettigrew) - Ball assemblage exposures on the Rivard property comprise generally massive felsic, sericitized, quartz porphyritic rocks exhibiting rare bedding or layering. These are intruded by a significant number of highly Fe-carbonate altered ultramafic sills. The sills are up to 50 m wide and traverse the property along an 070° trend, for a minimum distance across the property of 1 km. They are pervasively Fe-carbonate altered with development of significant chlorite and fuchsite alteration products. Mapping by Rubicon Minerals Inc. indicates that some of the sills are truncated by the erosional unconformity. Where observed, over a distance of approximately 200 m on the main Rivard stripped outcrop, an essentially monolithic conglomerate rests directly on the unconformity surface. This basal unit trends 030° and comprises 1 to 3 separate, 1 to 2 m thick, generally clast-supported conglomerate beds. Fragments are predominantly 1 to 10 cm quartz porphyry clasts set in a sand to clay-size matrix of quartz, lithic fragments, sericite and fuchsite. Southeast-facing graded bedding in the metre-scale beds is commonly observed. The fuchsitic matrix gives this rock a singular green colour, contrasting sharply with the rusty brown of the underlying altered ultramafic sills. Sandstone beds are intercalated with the conglomerate and increase in frequency up-section to the east. Overall, the sandstone unit is 15 to 20 m thick and comprises sand-size fragments of quartz and lithic fragments in a greenish sericitic and fuchsitic matrix, similar to those found in the conglomerate and similar to the footwall quartz porphyry. Trough cross-bedding and decimetre-scale graded bedding have a consistent southeast-facing direction. These 2 clastic sedimentary units are interpreted to represent the erosional detritus of a Ball assemblage volcanic edifice: the coarse- to fine-grained quartz porphyritic felsic component derived from possible tuffaceous beds or porphyritic rhyolite dome, and the fine to clay-sized sericitic and fuchsitic component derived from the more easily weathered ultramafic intrusive rocks. The sandstone unit is intercalated with metre-scale beds of grey to pinkish cream coloured quartz-phyric felsic tuff further east, until the tuff becomes the dominant lithology further up-section. Massive chert, chert-magnetite iron formation and local marble cap this interpreted homoclinal sequence in the extreme southeast portion of the Rivard property (Lichtblau et al., 2007).

Mineralization

Mineralization Comments

Dec 07, 2005 (K R Kettles) - MDI1 DATA: GRADE 1946 BULK SAMPLING PROGRAM: AREA 186 M LONG,4.69 M WIDE @ 0.1086 OPT AU According to C.P. St. Paul (1946), the bulk sampling program indicated as area 186 m long and 4.69 m wide grading 0.1086 oz/ton (3.723 g/tonne) Au.

Oct 30, 2020 (A McKee) - 2002: eight rock grab samples were collected. Sampling resulted in a maximum gold assay of 246.2 g/t sampling focused on quartz veins. Highly altered and sulphidized lithologies were also samples. 69 channel samples were taken on the property, a max gold assay of 9.79 g/t Au over 0.5 m, 2003: DDH near this area retuned assays of 14.32 g/t Au over 9.45 m, including 411.00 g/t Au over 0.30 m. 2006: two samples taken by e-Tech Ventures, not completely clear where the samples came from exactly but near the area, returned assays of 1238 ppb Au and 33345 ppb Au.

Oct 30, 2020 (Therese Pettigrew) - The Rivard Property contains spectacular narrow high-grade gold quartz veins in addition to broader zones of lower grade gold mineralization. The alteration system is relatively large and characterized by pervasive sericite-pyrite with local areas of silicification in felsic units. The Rivard Property contains numerous trenched exposures of coarse visible gold-bearing quartz +/-carbonate veins over an area measuring roughly 500 m x 100 m. Auriferous veins strike northwest 320 degrees, and range from 2 cm to 20 cm in width, with individual veins traceable up to 25 m along strike. Grab samples of visible gold-bearing veins collected by Rubicon in 2002 assayed up to 246.2 g/t gold (7.2 oz/ton). Alteration selvages, consisting of 5-10% medium- to coarse-grained pyrite cubes, typically extend 10-20 cm into surrounding felsic wallrock. Many veins occur in proximity to a distinctive fragmental unit (agglomerate or conglomerate?) that has been traced 600 m along strike to the south. A maximum gold assay of 96.20 g/t Au resulted from the fall 2002 prospecting. Other notable grab sample results include: 40.72 g/t Au, 8.39 g/t Au, 7.53 g/t Au and 5.12 g/t Au. Results of channel sampling on the Rivard Property include 9.79 g/t Au across 0.5 m within a 2 m zone grading 3.58 g/t Au; 7.89 g/t Au across 0.5 m within a 2 m zone grading 5.95 g/t Au; and 2.25 g/t Au across 1 metre. (Assessment report 52M01SE2027). Exploration efforts prior to 2006 have focused on the area underlain by the unconformity. Here, quartz and quartz-Fe-carbonate veins crosscut footwall and hanging-wall rocks. Crosscutting relationships suggest that many of the veins are contemporaneous and may indicate hydrofracturing. Veins tend to be 1 to 2 cm in width and contain varying amounts of quartz, Fe-carbonate, sulphide minerals (pyrite, sphalerite, galena) and visible gold. E-Energy’s 2006 drill program intersected the narrow, high-grade veins, and returned gold values up to 50.18 g/t Au over 0.30 m (Lichtblau et al., 2007).

Alteration Comments

Dec 07, 2005 (K R Kettles) - The mafic rocks are altered to carbonate, quartz and fuschsite. The felsic breccia is altered to fuchsite, quartz and tourmaline.

Mineral Record Details

Mineral Zones - Size and Shape

Rank: 1       Structure Type: Vein

Site Visit Information

Date: Feb 09, 1997

Geologist: K R Kettles

Notes: N/A

References

Map - Todd Township, Kenora District

Publication Number: M2406 Scale: 1:12,000    Date: 1978

Author: Riley R.A.

Publisher Name: Ontario Geological Survey

Location:

Mono - Gold occurrences, prospects, and deposits of the Red Lake area, volumes 1 and 2

Publication Number: OFR5558 Page: 657-658  Date: 1987

Author: Durocher M.E., Burchell P.S., Andrews A.J.

Publisher Name: Ontario Geological Survey

Location:

Map - Geological series, Todd Township, District of Kenora (Patricia Portion)

Publication Number: P1052 Scale: 1:12,000    Date: 1975

Author: Riley R.A.

Publisher Name: Ontario Division of Mines

Location:

Mono - Report of Activities 2003, Resident Geologist Program, Red Lake Regional Resident Geologist Report: Red Lake and Kenora Districts

Publication Number: OFR6127 Page: 49  Date: 2004

Author: Lichtblau A.F., Hinz P., Ravnaas C., Storey C.C., Kosloski L., Raoul A.

Publisher Name: Ontario Geological Survey

Location:

Mono - Report of Activities 2006, Resident Geologist Program, Red Lake Regional Resident Geologist Report: Red Lake and Kenora Districts

Publication Number: OFR6200 Page: 36-38  Date: 2007

Author: Lichtblau A.F., Ravnaas C., Storey C.C., Raoul A., Saunders D., McDonald J.

Publisher Name: Ontario Geological Survey

Location:

Mono - Report of Activities 1994, Resident Geologists

Publication Number: OFR5921 Page: 53-55  Date: 1995

Author: Baker C.L., Dressler B.O., Laderoute D.G., Newsome J.W.

Publisher Name: Ontario Geological Survey

Location:

Book - Canadian Mines Handbook 1946 Heath G.M.

Publication Number: CMH 1946 Page: 138  Date: 1946

Author: St. Paul, C. P.

Publisher Name:

Location: Red Lake RGP

File - Resident Geologist's Files, Red Lake

Publication Number: RGF RL Date: 1946

Author: Heath Gold Mines Limited

Publisher Name:

Location: Red Lake RGP

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