- SMDI #
- 2383
- Current Showing Name
- 87-1 Au Showing to 87-7 Au Showing {87-1, 87-2a, 87-3, 87-4a, 87-4b, 87-5, 87-6, 87-7}, Bruce Au Showing
- Historical Showing Names
- 87-1 Au Showing to 87-7 Au Showing {87-1, 87-2a, 87-3, 87-4a, 87-4b, 87-5, 87-6, 87-7}, Bruce Au Showing
- Company Name
- Project Name
- UTM Easting (NAD83 Z13)
- 679933.5600
- UTM Northing (NAD83 Z13)
- 6073653.4500
- NTS Sheet
- 063L16
- TRM (Township-Range-Meridian)
- 67-02-2
- Primary Commodities
- Gold
- Associated Commodities
- Discovery Type
- Outcrop Grab
- Status
- Occurrence: Primary Exploration
- Geological Details
- The showing consists of eight individual areas of auriferous quartz-ankerite±feldspar veining that are located approximately 375 m (0.23 mile) southeast of the Graham No. 3 showing or SMDI 0299a.
The bedrock at the showing sites consists of Missi Group conglomerates, arkoses, and greywackes. The polymictic and poorly sorted conglomerates are composed of cobbles of underlying Amisk Group rocks, white quartz pebbles, red to black chert pebbles, and red to orange jasper pebbles in a sand to silt-sized arkosic matrix that hosts up to 5% disseminated magnetite and pyrite. The pinkish to greenish grey arkosic/feldspathic wacke unit is composed of sand to silt sized grains of quartz and feldspar plus minor biotite, chlorite, and sericite. A pebbly arkose/feldspathic wacke, which is similar to the above-described unit, occurs in the showing area. Locally, one finds outcrops of a well foliated chlorite/carbonate schist that likely represent a strongly chloritized and carbonatized mafic intrusive.
This sequence of rocks form part of a drag fold on the northeast limb of the Magdalen Lake syncline and are deformed by a number of shear-folds which plunge 70 to 85°NW.
The above-described sequence of rocks host a series of generations of centimetre- to metre-scale quartz±carbonate±feldspar veins that contain up to 5% pyrite, 1% chalcopyrite, and traces of associated visible gold as disseminations and stringer zones. Eight individual showings (auriferous veins) comprise this showing.
Showing 87-1 consists of an east-west trending 2 to 5 cm (0.8 to 2.0 inch) wide zone of auriferous quartz-ankerite-feldspar veining hosted within a arkose/feldspathic wacke. The zone, which has been traced over a strike length of 30 m (98.4 ft), is cut by numerous small-scale joints, faults and fractures of various attitudes. The mineralization present is 3 to 5% pyrite and associated non-visible gold. Channel samples returned up to 0.079 oz./ton Au over 0.5 m.
Showing 87-2a, which is located 95 m (311.7 ft) southeast of Showing 87-1, consists of a 2 to 3 m (6.6 to 9.8 ft) wide east-west trending zone of centimeter- to meter-scale quartz-ankerite±feldspar veining hosted within arkose/feldspathic wacke and occasionally within chlorite-carbonate schist. The 45 m (147.6 ft) long zone, which parallels foliation, hosts up to 2% pyrite and non-visible gold mineralization. Channel samples taken across the vein network returned up to 0.179 oz./ton Au over 0.5 m.
Showing 87-3, which is located 112 m (367.5 ft) south of Showing 87-1, consists of a westerly trending zone of centimeter scale quartz-ankerite veining within arkose/feldspathic arkose and chlorite schist. A grab sample of 2% pyrite mineralization hosted in a quartz vein returned 0.090 oz./ton Au. This value cound not be duplicated with channel sampling.
Showing 87-4a, which is located 112 m (367.5 ft) south of Showing 87-1, consists of a 2 to 3 m (6.6 to 9.8 ft) wide, east-west trending zone of discontinous quartz-ankerite veining hosted within chlorite schist. Channel samples of the veining, which contain up to 3% pyrite mineralization, returned up to 0.111 oz./ton Au over 0.5 m.
Showing 87-4b, which is located 52 m (170.6 ft) southeast of Showing 87-4a, appears to be a fold nose thickening of the zone exposed at 87-4a. The idenitcal mineralization, which is exposed over a strike length of 20 m (65.6 ft) and across a width of 20 m (65.6 ft), is hosted within arkose/feldspathic wacke. Channel samples returned up to 0.072 oz./ton Au over 0.5 m.
Showing 87-5, which is located 240 m (787.4 ft) southeast of Showing 87-1, consists of east-west trending quartz-ankerite-feldspar veins hosted in a arkose/feldspathic wacke that contains lenses of chlorite schist. The boudinaged and folded quartz veining has been exposed discontinously over a strike length of 10 m (32.8 ft). The 3 to 5% pyrite mineralization that makes up this showing was channel sampled and returned up to 0.062 oz./ton Au over 0.5 m. One grab sample returned 0.405 oz./ton Au.
Showing 87-6, which is located 375 m (1230.3 ft) southeast of Showing 87-1, consists of east-west trending pyritic quartz veining associated with chlorite schist within a arkose/feldspathic wacke. The veining, which contains up to 3% pyrite, has been traced over a width of 35 m (114.8 ft) and along strike for 40 to 50 m (131.2 to 164.0 ft). Channel samples returned up to 0.196 oz./ton Au over 0.5 m.
Showing 87-7, which is located 395 m (1295.9 ft) southeast of Showing 87-1, consists of a 2 to 3 m (6.6 to 9.8 ft) wide zone of east-west trending discontinous quartz-ankerite±feldspar veining within arkose/feldspathic wacke. The zone, which has been traced over a strike length of 50 m (164.0 ft), hosts up to 3% pyrite. Channel samples returned up to 0.248 oz./ton Au over 0.5 m.
The Bruce Showing or showing 87-8, which is located 160 m (524.9 ft) east of Showing 87-1 and 260 m (853.0 ft) from the Graham #3 vein, consists of a S-folded, southeasterly plunging quartz-ankerite±feldspar stringer zone hosted within arkose/feldspathic wacke. The quartz veining hosts up to 5% pyrite and local traces of visible gold. A grab sample returned 1.30 oz./ton Au and channel samples returned up to 0.167 oz./ton Au over 0.5 m. The best channel sample taken in 1988 returned 0.115 oz/st Au over 0.5 m.
- Geological Domain
- Flin Flon
- Host Rocks
- Host Minerals
- Ankerite
- Indicators
- Exploration History
- 3/31/1992 Initial work in the showing area resulted in the discovery of the Graham No. 3 Showing or SMDI 0299a. In 1964, The Graham No. 3 showing was diamond drilled. By 1973, the Graham #3 showing was within ROD claim No. 4. Between 1973 and 1975, Rod McKenzie and J. Stewart completed 6 trenches on the claim (AF 63L16-0054).
On 2 August 1982, the showing area was staked as S-95641 and S-95642 by Jim Campbell and Rod McKenzie. On the same date, SMDC surrounded these claims with CBS 8867. The claims were optioned from J. W. Campbell by a Vista Mines Incorporated-SMDC joint venture partnership.
In 1986, SMDC completed reconnaissance geologic mapping, lithochemical and soil sampling of the properties (grid 4-83 ) (AF 63L16-0112). SMDC also completed forest litter and treebark biogeochemical surveys over the showing area (AF 63L16-0111).
In the winter of 1987, grid 5-87 was established over the showing area and ground VLF-EM, magnetic/gradiometer, and IP/resistivity surveys were completed (AF 63L16-0121).
In the spring of 1987, Cameco also completed soil and wacker till sampling on the grid to the northeast of the showing near the Graham 3 and 4 zones (AF 63L16-0120).
In the summer of 1987, Cameco completed further mapping, prospecting, and lithogeochemical sampling on grid 5-87 that resulted in the discovery of the auriferous veins that have been named the 87-1 to 87-8 showings (AF 63L16-0122). The showings were stripped, detail mapped (1:1,100) and channel sampled.
In 1988, a Cameco (50%)-Vista Mines (50%) partnership completed overburden stripping, geological mapping and chip sampling on the 87-8 Showing (AF 63L16-0126).
- Production History
- Reserves and/or Resources