Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI41O10NW00013

Record: MDI41O10NW00013

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Tooms

Latitude: 47° 43' 28.88"    Longitude: -82° 51' 31.46"

UTM Zone: 17    Easting: 360612.64   Northing: 5287374.59    UTM Datum: NAD83

Resident Geologist District: Timmins

NTS Grid: 41O10NW

Point Location Description: Trench B in Quinterra's trench area 7.

Location Method: Field Visit with GPS

Access Description: Easy access to the area is possible by the logging / mining access road which extends north from Kormack and Highway 667. From the northern branch of this road leading to Betty Lake, a bush trail leads past the old camp and ends at the stripped outcrops related to the prospect.

Exploration History

1982: Quinterra Resources staked ground covering the claims and carried out a till sampling program south of this prospect. Later in the year a small drill program was carried elsewhere on the property. In the following year (1983) a ground magnetometer survey and overburden stripping program was carried out over the prospect after it was found by prospecting. Assays up to 5 g/t (0.16 opt) gold were obtained from highly carbonatized volcanics, and the average was 1 g/t. Also one hole from a larger drill program tested the zone at depth. Though this hole (SC-15) intersected similar geology assay results were very discouraging. Later in the year a large IP program was carried out along the strike extensions of the green carbonate zone. In 1984 an airborne magnetic and VLF electromagnetic survey was flown over the whole claim group and the prospect was stripped and resampled. The best result in this resampling was 1.3 g/t Au. One hole was drilled to test the zone in 1984 which intersected broad zones of anomalous gold but the highest value was 1.4 g/t. 1985: The Canadian Nickel Company optioned the property and carried out a reverse circulation drilling program to sample the overburden. No samples were obtained in the vicinity of the prospect described here. 1987: Quinterra Resources resumed exploration and tested the zone at depth with a number of holes. Again broad zones of anomalous gold were intersected and the highest values reported were up to 4 g/t. 1992: Kennecott Canada acquired the property and carried out an exploration program in the search for nickel. Work consisted of magnetic and HL electromagnetic surveying, geological mapping and prospecting. Follow-up diamond drilling consisted of a series of holes drilled southwest of this prospect. 2002: Canabrava Diamond Corporation – AEM, AMag, DD – 1 – 120m, Pr, Samp.

Assessment Work on File

Geology

Province: Superior

Subprovince: Abitibi

Terrane: Wawa-Abitibi

Belt: Swayze

Tectonic Assemblage: Garnet-Tooms

Geological Age: Neoarchean   Geochronological Age: 2730 +/-3 MA   Geochron. Age Ref.: OF3384E

Metamorphism Type: Regional

Metamorphism Grade: Greenschist

Geology Comments

Dec 07, 2005 (S Fumerton) - The chert - banded iron formation is highly attenuated and locally foliated. Locally along strike the contacts of the green carbonate zone are highly sheared and schists are developed. This is best seen to the east of the area stripped by Quinterra and in a zone stripped by Noranda.

Lithology

Lithology Comments

Dec 07, 2005 (S Fumerton) - The mineralization is associated with mafic and ultramafic volcanics together with minor pyritic chert beds which have been intruded by a syenitic porphyry. All rock types have been extensively altered. The intense green-carbonate alteration is roughly confined to a 'stratigraphic' zone. To the north of the zone the alteration intensity falls off sharply and elliptical fragments are faintly discernible in the mafic volcanics which have been classified as tuffs. To the south the green carbonate is bounded by a more massive highly carbonatized ultramafic. Typically the green-carbonate is strongly foliated but locally the intensity and duration of alteration has resulted in a more massive rock being developed. The chert - banded iron formation consist of thinly bedded, white, opaque chert with abundant sulphides. The syenitic 'porphyry' is pink, fine grained, and fragmented. Fracture voids are filled with brown carbonate and dark green chlorite. Sparse disseminated pyrite occurs in the rock matrix.

Mineralization

Mineralization Comments

Dec 07, 2005 (S Fumerton) - The best mineralization occurs in quartz/carbonate veins associated with highly carbonatized mafic volcanics. These veins which are typically 2cm thick but up to 7cm, and up to several metres long. In some cases iron carbonate forms the core of the vein which is surrounded by quartz and else where the reverse association occurs. Sparsely disseminated pyrite commonly occurs in the veins, though locally the veins contain massive pyrite lenses. The quartz veins form multiple stringers of different ages, varying attenuation, and folding. Some of the veins are isoclinally folded. The density of the veins is up to 5% of the rock. In the main trench area sulphides are uncommon in the green carbonate zone and gold values are low. The silicified (vein) syenite has up to 2% disseminated sulphides. The greatest concentration of pyrite is associated with the chert horizon. In these horizons pyrite occurs as medium grained recrystallized grains in irregular semi-massive lenses with indistinct boundaries. To the east, in the area stripped by Noranda, pyrite occurs in very fine grained dustings within the matrix of the green carbonate zone and also occurs as irregular discordant veins. These veins are up to 6mm thick, semi massive and have an iron carbonate matrix.

Dec 07, 2005 (A Wilson) - Grab samples from carbonatized metavolcanics returned values up to 5 g/t Au with average values of 1 g/t Au. A diamond drill hole completed in 1984 intersected broud zones of anomalous gold but the highest value was 1.4 g/t Au. Diamond drilling completed completed by Quinterra in 1987 also outlined broad zones of anomalous gold with the highest values up to 4 g/t Au. Grab samples collected by the OGS returned values of 0.24 g/t Au and 0.4 g/t Ag; 0.65 g/t Au and 0.5 g/t Ag.

Assay Samples

Mineral Record Details

Mineral Zones - Size and Shape

Rank: 1       Structure Type: Shear

References

File - Resident Geologist files 1980, air photos

Publication Number: Date: 1996

Author:

Publisher Name:

Location:

Map - Geology, Swayze greenstone belt, Sultan, Ontario

Publication Number: OF 3384E Scale: 1:50,000    Date: 1999

Author: Heather, K B; Shore, G T

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/210453

Map - Tooms and Greenlaw townships, Sudbury District

Publication Number: M2121 Scale: 1:31,680    Date: 1997

Author: Donovan J.F.

Publisher Name: Ontario Dept. of Mines

Location:

MonoMap - Mineral Prospects of the Swayze Greenstone Belt (Volume 1, Parts of NTS 41 O and Volume 2, Parts of NTS 41 P, 42 A and 42 B)

Publication Number: OFR5912 Page: 157-159  Date: 1995

Author: Fumerton S.L., Houle K.A.

Publisher Name: Ontario Geological Survey

Location:

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