Ontario Geological Survey
Permanent Link to this Record:
MDI52N07SE00018
| Record Name(s) | Bobarris Lake West - 1987 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Mar-20 |
| Date Last Modified | 2022-Sep-26 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Shabumeni Lake Area
Latitude: 51° 17' 57.49" Longitude: -92° 33' 38.09"
UTM Zone: 15 Easting: 530635 Northing: 5683201.01 UTM Datum: NAD83
Resident Geologist District: Red Lake
NTS Grid: 52N07SE
Point Location Description: Trench location from Assessment file 20000007338
Location Method: Data Compilation
Access Description: 80 KM ENE of Red Lake
1966: Asarco Exploration Company carried out geological mapping, magnetic, IP, and EM surveys. 1969: Vanco Exploration Ltd. carried out geological mapping, and SP and magnetometer surveys. 1987-88 Lencourt Ltd. carried out geological mapping and sampling. 1989: Noranda Exploration Company Ltd. conducted prospecting and sampling. 2003: Fronteer Development Group Inc. 2004: Fronteer Development Group Inc. carried out a ground magnetic survey. 2010-11: Frontline Gold completed a prospecting and sampling program.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.12713 | 52N07SE0005 | 52N07SE0005 |
| 2.51478 | 20000007338 | 20000007338 |
| 2.11338 | 52N07NE0001 | 52N07NE0001 |
| 63.2659 | 52N07SE0060 | 52N07SE0060 |
| 63.1995 | 52N07SE0064 | 52N07SE0064 |
| 2.27475 | 52N07SE2003 | 52N07SE2003 |
| 2.24997 | 52N08SW2002 | 52N08SW2002 |
| 2.50067 | 20000006385 | 20000006385 |
| 2.46929 | 20000006012 | 20000006012 |
Province: Superior
Subprovince: Uchi
Terrane: North Caribou
Domain: Uchi
Belt: Birch-Uchi
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Felsic lava flow-unsubdivided | 1 | Host |
|---|
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Arsenopyrite | Economic | Ore | ||||
| 2 | Pyrite | Economic | Ore |
Jan 26, 2012 (A McKee) - GRADE 1987 GRAB SAMPLE: 1500 PPB AU. 2007: 2592 ppb Au 2010: 580 ppb Au
Jul 26, 2019 (Therese Pettigrew) - The Bobarris Showing consists of a 4-meter long historic trench oriented 010 degrees within the Grace Lake Deformation Zone. The trench exposes fissile chlorite-sericite schist containing sulphide bearing near vertical silicified rods. Foliation in the vicinity of the trench is at about 080/78 degrees NW. The silicified rods contain up to 1% arsenopyrite and up to 2% pyrite. The silicified rods appear to contain minor Fe-carbonate and possibly albite alteration. Limited outcrop in the area suggests that the original host rock was an intermediate to felsic volcanic. Silicification and arsenopyrite was found in small outcrops over a strike distance of approximately 15 m. Silicification and arsenopyrite was found across the entire sampled width of 2.90 m in the old trench. The Bobarris Showing is interpreted to lie within a shear zone hosted dilation zone within the Grace Lake Deformation Zone. Chip samples assayed up to 2.55 g/t Au (Assessment report 52N08SW2002). Sample 5930N collected by Noranda in 1989 from a felsic volcanic with <1% pyrite returned an assay of 1.54 g/t Au (Assessment file 52N07SE0005). Samples collected by Frontline Gold in 2011 returned assays of 1.18 and 1.237 ppm Au from a tan-coloured aphanitic rock with quartz-rich pods that contain up to 3% disseminated sulphides, mostly arsenopyrite and pyrite (Assessment file 20000007338).
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