Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000000664

Record: MDI000000000664

General

Commodities

Primary Commodities: Gold, Copper

Secondary Commodities: Strontium

Location

Township or Area: Halcrow

Latitude: 47° 49' 44.42"    Longitude: -82° 56' 57.81"

UTM Zone: 17    Easting: 354106.998   Northing: 5299134.996    UTM Datum: NAD83

Resident Geologist District: Timmins

NTS Grid: 41O15SW

Point Location Description: Precise: UTM coords of collar, DH UN06H1

Location Method: Based on Assessment

Access Description: Access to the property is by a network of logging roads which runs to the southwest off Highway 101 about 40 km. west of Foleyet, the nearest settlement. The northwest corner of the property lies about 28 km. from the highway.

Exploration History

1955, Shunsby Gold Mines: trenching, geiger counter survey 1984: Regal Petroleum - airborne geophysics, geological and geochemical mapping. 1990-91: Troup and Otton - mapping, rock and soil sampling. 1992-97: Alcanex Ltd. (Lorac Properties option) - mapping, resampling, ground geophysics, geochemical surveys, trenching. 2005-06: Union Gold Inc. - prospecting, sampling, ground geophysics, compilation, drilling

Assessment Work on File

Geology

Province: Superior

Subprovince: Abitibi

Terrane: Wawa-Abitibi

Belt: Swayze

Geological Age: Neoarchean  

Lithology

Lithology Comments

May 06, 2009 (D Draper) - Upon discovery, Alcanex Zone 4 consisted of 2 roughly parallel trenches, about 36.5m (120ft ) apart, dug mainly in shallow overburden. These were thought to have originally been excavated in the 1940's or 1950's, and were designated TR 6 (west trench) and TR 5 (east trench). Bedrock was exposed in places along the bottom and sides of the trenches. Both trenches revealed highly sheared and weathered granitic rock and chlorite schist, that was presumed to represent altered andesite tuff. Gold concentrations appeared to be directly related to areas of shearing, especially where shearing is accompanied by pyrite in amounts of up to 10 percent. This condition is most commonly, but not exclusively, seen within and at the contact of bodies of granitic rock. (T-3594) The Shunsby Halcrow Uranium Prospect was described as follows: Two trenches, 125ft apart, were excavated about ½ mile [805m] east of the Ivanhoe River. The rocks exposed in the trenches are red fine grained syenite or aplite and fine greenstone, dark gray to green in colour. The two units are intimately mixed and rather sheared and altered with rusty weathered streaks and patches. (Mudford report, Halcrow Township Uranium Prospect, in Nov. 1955 Prospectus, AF T-2050) No location for the Shunsby trenches was illustrated in the original report. However, the Alcanex Zone 4 trenches match the timeframe, the description of the prospect and fit the given location, being approximately 800m east of the river.

Mineralization

Mineralization Comments

May 06, 2009 (D Draper) - Shunsby Gold reported geiger counts of three to eight times background were found in the rusty weathered material and, in a narrow fracturing in the south end of the west trench [Alcanex TR 6], a geiger count of fifty times background was obtained. (Mudford report, Halcrow Township Uranium Prospect, in Nov. 1955 Prospectus, AF T-2050) Initial sampling of Zone 4 in 1991 returned gold values only up to 380ppb. However, 2 samples taken at this location (within TR 5) that year also assayed 4540 ppm copper in a grab sample and 3070 ppm Cu over 0.6 m within a porphyry mineralized with up to 20% disseminated pyrite. Another sample returned 5480 ppm Cu, from an indeterminate location described as ¼ mile SE of the (Zone 4) sample site. Zone 3 is located approximately 260m southeast of Zone 4. A 1991 sample from Zone 3 assayed 640 ppb Au. (T-3497) 1992 work: Zone 4 TR 5 assayed 0.89 g/T over 3.7 metres from a zone that appears to be at least 20 metres in width. Channel sampling from Zone 3 yielded an average value of 0.74 g/T Au over 2.6 metres. (T-3594) Union Gold drilling results: Hole UN06H1, Zone 4 - 976 ppb Au over 1.5m in a feldspar porphyry and 2960 ppb Au over 0.7m in a quartz-carbonate enriched zone in a sericitic porphyry. An unaltered porphyritic unit just above this latter zone returned an anomalous strontium value of >5000 ppm over 1.4m. Hole UN06H2, Zone 3 - best assay from the hole on this zone was 282 ppb Au and 1990 ppm Cu over 0.8m within a mafic volcanic unit. (T-5467)

Mineral Record Details

References

File - Resident Geologist file T-2050

Publication Number: Date:

Author:

Publisher Name:

Location: Timmins RGP office

Map - Halcrow and Denyes townships, Sudbury District

Publication Number: M2120 Scale: 1:31,680    Date: 1997

Author: Donovan J.F.

Publisher Name: Ontario Dept. of Mines

Location:

MonoMap - Geology of Halcrow-Ridout lakes area, District of Sudbury

Publication Number: R063 Page: 42  Date: 1968

Author: Donovan J.F.

Publisher Name: Ontario Dept. of Mines

Location:

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