Ontario Geological Survey
Permanent Link to this Record:
MDI52B09SW00011
| Record Name(s) | Discovery Point - 1913, INCO Shebandowan - 1936 |
|---|---|
| Related Record Type | Partial |
| Related Record(s) | |
| Record Status | Past Producing Mine Without Reserves or Resources |
| Date Created | 1991-Feb-27 |
| Date Last Modified | 2022-Sep-26 |
| Created By | |
| Revised By |
Primary Commodities: Nickel, Copper, Platinum, Palladium
Secondary Commodities: Gold, Silver, Cobalt, Chromium
Township or Area: Hagey
Latitude: 48° 35' 58.2" Longitude: -90° 16' 7.3"
UTM Zone: 15 Easting: 701361.99 Northing: 5386537.13 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52B09SE, 52B09SW
Point Location Description: Precise
Location Method: Conversion from MDI
1913-14: W.W. Benner discovered nickel at Discovery Point. Test pits blasted by Cross brothers. 1927-30: Cross conducted trenching, stripping, and diamond drilling. 1936-52: Claims purchased by INCO, who carried out trenching, test-pitting, geophysical surveys, and diamond drilling. 1952-65: INCO carried out intermittent diamond drilling. 1966-67: No. 1 Shaft development commenced in 1966 and was completed in 1967. Underground diamond drilling conducted on 305 m level. Mag and EM geophysical surveys were performed. 1968: No. 2 production shaft started. 1970: No. 2 shaft at 670.6 m. 1972: Headframe for No. 2 shaft completed. Five compartment No. 2 shaft completed to 730 m with levels at 60.96 m (200 foot) intervals. 1972-81: mine in production. Mine closed 1981. 1983: production resumed. 1985: mine placed on standby in November. 1989: mine resumed production. 1992: mine placed on standby in the spring. 1995: mine resumed production in May. 1998: mine closed. Production totals recorded in MDI52B09SE00003.
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Shebandowan
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Peridotite | 1 | Peridotite Sill/Dyke | Host |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Adjacent |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore | ||||
| 2 | Pentlandite | Economic | Ore | ||||
| 3 | Pyrite | Economic | Ore | ||||
| 4 | Pyrrhotite | Economic | Ore |
May 30, 2018 (Therese Pettigrew) - A series of replacement sulphide lenses, connected by very narrow widths of sulphides, occur in sheared peridotite. The lenses range from 800-1600 feet (244-488 m) in length and extend over a linear distance of at least 4000 feet (1219 m). The larges lens lies under the lake. The deposit averages 16 feet (4.9 m) in width and contains pyrite, chalcopyrite, pyrrhotite and polydmite in massive and disseminated form (Shklanka, 1969). The Shebandowan orebody is associated with a serpentinized peridotite sill/dyke in contact with mafic metavolcanic rocks and the Shebandowan Lake Stock. The orebody is contained within a sequence of steeply-dipping volcanics, the ore occurring as stringers of sulphides, with the principal ore minerals being pyrrhotite, pentlandite, and chalcopyrite. The ore contains nickel and copper in a 3 to 2 ratio as well as small amounts of cobalt, silver, gold, and the platinum-group metals. Also associated with the orebody along the southern contact is a narrow chromite zone which is adjacent to a fault locally known as the Crayfish Creek Fault (CIM Reporter, April 23, 1980). The chromite zone occurs within serpentinite at the Crayfish Creek fault. Chromite occurs over a 10 foot (3 m) wide zone in layered, brecciated, and finely disseminated form. The main chromite layer is 10-11 cm thick and is defined by a 40-50% modal concentration of very fine-grained chromite. On either side of this main layer is found brecciated fragments of chromitiferous serpentinite (Whittaker, 1979 report in RGP MDI files). Sample F-9-79 collected by OGS staff member J. Scott in 1979 assayed 5.68% Ni, 1.34% Cu, 1950 ppm Co, 0.013 opt Pd, 0.02 opt Au, and 0.44 opt Ag.
Mono - Copper, nickel, lead and zinc deposits of Ontario
Publication Number: MDC012 Page: 289-290 Date: 1969
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of the Lower Shebandowan Lake area, District of Thunder Bay
Publication Number: R110 Page: 21-27 Date: 1973
Author: Morin J.A.
Publisher Name: Ontario Division of Mines
Location:
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