Ontario Geological Survey
Permanent Link to this Record:
MDI42C12NW00008
| Record Name(s) | Barren Sulphide Zone - 1973, Sucker Zone - 1973 |
|---|---|
| Related Record Type | Partial |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1991-Mar-26 |
| Date Last Modified | 2022-Feb-23 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Bomby
Latitude: 48° 41' 28.97" Longitude: -85° 53' 42.2"
UTM Zone: 16 Easting: 581316 Northing: 5393738 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42C12NW
Point Location Description: Outcrop at the side of Highway 17
Location Method: Conversion from MDI
Access Description: Approx. 35 km east of Marathon and 50 km south of Manitouwadge, Ontario. Highway 17 bisects the area in an east-west direction and provides the best access to the area. The main CP line also traverses the area and roughly parallels the highway within about 1km to the south.
1973: Ardel Explorations drilled 3 DDH totalling 240.8 m. 1980-81: the property was staked by Corona Resources Ltd., who carried out line cutting, magnetometer and VLF-EM surveys, and drilled 173 holes totalling 24,384 m.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 63.4447 | 42C12NW0029 | 42C12NW0029 |
| 63.3958 | 42C12NW0144 | 42C12NW0144 |
| 42C12NW0013B1 | 42C12NW0167 | 42C12NW0167 |
| 42C12NW0014A1 | 42C12NW0162 | 42C12NW0162 |
| 63.3078 | 42C12NW0166 | 42C12NW0166 |
| 63.4477 | 42C12NW8664 | 42C12NW8664 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Schreiber-Hemlo
Geological Age: Archean
Dec 07, 2005 (R Tuomi) - The western part of this outcrop consists of quatrz-eye tuff locally refered to as the 'Barren Sulphide Zone'. Disseminated pyrite and pyrrhotite occur for 5m on either side of the contact with overlying metasediments. The conductive unit can be traced by VLF EM and serves as a stratigraphic marker horizon. In many places the tuff contains sericite and minor green mica. Deformation is most intense along the contact between tuff and metasediments; the state of strain can be observed in a boudinaged mafic dike. Within the Barren Sulphide Zone, bedding in the tuff is at an angle of 20 to 30 degrees to the metamorphic foliation, and sulphides occur within the foliation plane. The eastern part of the outcrop consists of folded and boudinaged, calc-silicates and pelites in metasiltstone. The pelite contains garnet, staurolite, sillmanite, cordierite, and anthophyillite. The calc-silicates consist of calcium-rich amphibole, commonly on the margins of boudins and layers, and calcium-rich plagioclaise.
| Rock Type | Rank | Composition | Texture | Relationship | Schist-Unsubdivided | 1 | Host |
|---|---|---|---|---|
| Felsic Tuff | 2 | Quartz-Eye Tuff | ||
| Terrigenous-Clastic-Unsubdivided | 3 |
Jan 12, 2016 (Therese Pettigrew) - Sericitized, feldspathized, pyritic schist from quartz crystal arenite (M2614).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Pyrrhotite | Economic | Ore | ||||
| 1 | Garnet | Economic | Gangue | ||||
| 2 | Staurolite | Economic | Gangue | ||||
| 3 | Sillimanite | Economic | Gangue | ||||
| 4 | Cordierite | Economic | Gangue | ||||
| 5 | Anthophyllite | Economic | Gangue | ||||
| Sericite | Alteration | Sericitization | 1 | Unknown | Disseminated | ||
| Feldspar | Alteration | Feldspathization | 2 | Unknown | Disseminated |
Jan 12, 2016 (Therese Pettigrew) - Grab samples returned assays of 0.51, 0.02 and <0.01 ounce per ton Au (Patterson, 1984). 10-20 cm massive pyrite and pyrrhotite, 10% disseminated pyrite and pyrrhotite. Very erratic, rare Au values up to 17.48 gpt Au, but most samples return null values of gold (M2614).
Mono - Field trip guidebook to the Hemlo area
Publication Number: MP118 Scale: Date: 1984
Author: Patterson G.C.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological Compilation of the Eastern Half of the Schreiber-Hemlo Greenstone Belt
Publication Number: M2614 Scale: 1:50,000 Date: 2000
Author: Muir T.L.
Publisher Name: Ontario Geological Survey
Location:
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