Ontario Geological Survey
Permanent Link to this Record:
MDI42C03NW00022
| Record Name(s) | Ambrose Lake Occurrence - 1990 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2000-Dec-14 |
| Date Last Modified | 2022-Sep-09 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Keating
Latitude: 48° 13' 45.69" Longitude: -85° 18' 35.19"
UTM Zone: 16 Easting: 625521.35 Northing: 5343174.04 UTM Datum: NAD83
Resident Geologist District: Sault Ste. Marie
NTS Grid: 42C03NW
Point Location Description: South shore of Ambrose Lake
Location Method: Data Compilation
Access Description: The site is accessible via the Eagle River Mine/Paint Lake road. Drive west along the road for approximately 25.5 km to the powerline. Drive north along a forestry road for approximately 12 km.
1980: International Corona Resources - airborne geophysics. 1989-90:Corona Corporation - mapping, sampling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| Keating-0017 | 42C07SW0031 | 42C07SW0031 |
| WPABOTOSSAWAY29 | 20000018787 | 20000018787 |
| WP Corbiere-14 | 42C06SE0002 | 42C06SE0002 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Michipicoten
Geological Age: Archean
Metamorphism Type: Regional
Metamorphism Grade: Greenschist
| Rock Type | Rank | Composition | Texture | Relationship | Intermediate Tuff | 1 | Intermediate To Felsic | Tuff, Lapilli Tuff, Sheared | Hanging Wall |
|---|---|---|---|---|
| Gabbro | 2 | Gabbro | Sheared | Host |
Dec 07, 2005 (A Wilson) - An extensional shear occurs at the contact between a sheared intermediate tuff and a gabbroic unit. The shear is pervasively ankeritized and silicified. Quartz-tourmaline veining is prominent within the shear.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Gangue | ||||
| 2 | Chalcopyrite | Economic | Gangue | ||||
| Ankerite | Alteration | Carbonatization | 1 | Medium | Replacement |
Dec 07, 2005 (A Wilson) - Pyrite and chalcopyrite form up to 5% of the veins and shear system. The best gold value was 1.5 g/t Au from a grab sample in the shear zone.
| Rank | Characteristic |
|---|---|
| 1 | Sheared |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular | 7 | 1 | 210 | 45 |
Map - Geology of the Iron Lake Area
Publication Number: OFM0116 Scale: 1:15,840 Date: 1988
Author: Reilly B.A.
Publisher Name:
Location:
MonoMap - Geology of the Pukaskwa River-University River area, districts of Algoma and Thunder Bay
Publication Number: R153 Date: 1977
Author: Bennett G., Thurston P.C.
Publisher Name: Ontario Division of Mines
Location:
Map - University River, Algoma and Thunder Bay districts
Publication Number: M2333 Scale: 1:63,360 Date: 1976
Author: Bennett G., Thurston P.C., Giguere J.F.
Publisher Name: Ontario Division of Mines
Location:
Mono - Geology of the Iron Lake area
Publication Number: OFR5783 Date: 1991
Author: Reilly B.A.
Publisher Name: Ontario Geological Survey
Location:
Map - Operation Pukaskwa, districts of Algoma and Thunder Bay
Publication Number: P0541 Scale: 1:126,720 Date: 1997
Author: Bennett G., Thurston P.C., Giguere J.F.
Publisher Name: Ontario Dept. of Mines
Location:
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For detailed information regarding this mineral record please contact the Sault Ste. Marie Resident Geologist District Office