Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000002239

Record: MDI000000002239

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Oboshkegan

Latitude: 50° 9' 59.89"    Longitude: -87° 32' 9.68"

UTM Zone: 16    Easting: 461718   Northing: 5557296    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 42L04NE

Point Location Description: Map in assessment file 42L03NW2006

Location Method: Data Compilation

Access Description: The property is accessible by traveling 7km East of Jellicoe, then North on the Kinghorn Road to Km86. At this point turn East onto a logging road for 1.5 km. An access route heading south, then west then south covers the final 1.7 km to the project area.

Exploration History

1996: Cameco acquired the property and carried out prospecting, sampling, mapping, ground magnetic and IP surveys. The Ryne and Hourglass showings were discovered. 1998-99: Cameco Gold carried out trenching, sampling, and drilled 10 DDH totaling 2193.5 m. 2004: Kodiak Exploration Ltd. optioned the property and carried out prospecting, stripping and sampling. 2007-9: Spruce Ridge Resources Ltd. optioned the property and conducted prospecting, mapping, channel sampling, and trenching.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wabigoon

Terrane: Eastern Wabigoon

Belt: Onaman-Tashota

Geological Age: Archean  

Lithology

Lithology Comments

Dec 04, 2018 (Therese Pettigrew) - The Hourglass trench area is underlain by predominantly intermediate pyroclastic deposits (pyroclastic to tuff breccia, lapilli tuff and crystal tuff). Contacts among the pyroclastic units are gradational. The breccia unit, which occupies the northern half of the trench, is seen to be grading southward into the lapilli tuff to tuff units. Subconcordant, narrow (20-30 cm wide), fine-grained intermediate to felsic hypabyssal intrusive rocks (felsite dykes/sills) have intruded the pyroclastic sequences. The Ryne showing (located 450 m SW of the Hourglass Zone, at NAD83 UTM Zone 16 461304 m E, 5557168 m N) is comprised of polymictic conglomerate interbedded with intermediate to felsic lapilli tuff. Narrow (1-8 m wide) mafic to ultramafic sills and dykes are ubiquitous (Assessment File 42L03NW2006).

Mineralization

Mineralization Comments

Dec 04, 2018 (Therese Pettigrew) - A NW-striking, 3-10 m wide, dextral shear/deformation zone occurs at the southern margin of the Hourglass trench. This structure deforms the felsite dyke and host rock. The rocks within the structural zone are strongly iron carbonated, sericitized, pyritized (2-3%) and impregnated by subconcordant, narrow quartz-tourmaline veins. Grab and channel samples taken from the central portion of this zone yielded 1 gpt Au over 2.5 m width. This includes a relatively higher gold value (3.2 gpt Au over 0.5 m) which was yielded by a felsite dyke sample. Visible gold is also noted in the felsite dyke. Two NW-trending, narrow quartz-tourmaline veins, which are situated within the east-central and northwestern parts of the trench, yielded 3.6 gpt Au (sample 8037) and 2.8 gpt (sample 8081) gold respectively. A channel sample returned an assay of 44.2 gpt Au over 2.0 m width (Assessment file 20000000671). A sample collected from the Hourglass trench by Spruce Ridge Resources in 2007 returned an assay of 125.72 gpt Au (Assessment File 20000004346). The Hourglass West Trench is located approximately 200 m NW of and on strike with the Hourglass Showing. The highest gold value obtained to date from the dykes in the West trench is 169.9 gpt Au over 0.5 m (sample 8194). Early work on the Ryne Showing in 1996 was highlighted by a grab sample that returned an assay of 2498 gpt Au from a splashy gold exposure at the centre of the showing. At the Ryne showing, highly deformed and altered mafic schists of probably intrusive origin contain anomalous gold, up to 1.83 gpt Au (sample 5519). The best assay from the Ryne Zone is 5.23 gpt Au over 4.5 m. Other anomalous samples include: 1.42 g/t Au over 2.5 m, 4.58 g/t Au over 1.0 m, 1.00 g/t Au over 4.5 m, 2.19 g/t Au over 1.0 m, 2.50 g/t Au over 1.0 m and 1.94 g/t Au over 3.5 m, 2.44 g/t over 2.5 m (samples 8565-8567 and 8574-8575) and 1.3 g/t over 5.5 m (samples 8231-8240). DDH ONA98-24 returned gold values of 0.20 g/t over 7.5 m (36.0 m-43.5 m), 2.85 g/t over 0.66 m (55.48 m -56.14 m), 0.45 g/t over 1.5 m (85.5 m-87.0 m) and 3.1 g/t over 0.4 m (200.3 m-200.7 m). DDH ONA98-25 returned gold values of 0.58 g/t over 1.4 m (49.4 m-50.8 m), 0.48 g/t over 1.5 m (66.0 m-67.5 m) and 0.70 g/t over 0.8 m (137.5 m-138.3 m). DDH ONA98-26 returned gold values of 1.25 g/t Au over 8.0 m (includes 3.91 g/t over 1.0 m) from 85.0 m-93.0 m, 0.61 g/t over 1.95 m (37.5 m-39.45 m) and 2.1 g/t over 1.5 m (164.5 m-166.0 m). DDH ONA98-29 returned gold values of 34.9 m-36.25 m (0.79 g/t over 1.35 m); 44.75 m-48.70 m (0.46 g/t over 3.95 m); 50.65 m-53.70 m (1.63 g/t over 3.05 m, which also includes 3.09 g/t over 0.85 m): 53.70 m-79.50 m (0.20 g/t over 25.8 m) (Assessment File 42L03NW2006).

Mineral Record Details

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For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office