Ontario Geological Survey
Permanent Link to this Record:
MDI42A10SW00081
| Record Name(s) | Royal Oak - East Peninsula - 1995, Ronnoco Extension - 1995 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Prospect |
| Date Created | 2002-Oct-09 |
| Date Last Modified | 2022-Sep-22 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Macklem
Latitude: 48° 30' 28.38" Longitude: -80° 55' 2.49"
UTM Zone: 17 Easting: 506104 Northing: 5372755 UTM Datum: NAD83
Resident Geologist District: Timmins
NTS Grid: 42A10SW
Point Location Description: collar of Royal Oak DDH HP95-254
Location Method: Based on Assessment
Access Description: Drill trails lead south to this area from the Asarco Aquarius Mine Site.
1986-87: Pamour Inc. - ground geophysics, OVD-84-8025 ft, DD. 1995: Royal Oak Mines Inc. - DD-26-20,341 m
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| T-2313/OM86-5P-197 / 63.4921 | 42A11SE8407 | 42A11SE8407 |
| T-3797/ W9660-00358 | 42A10SW0045 | 42A10SW0045 |
Province: Superior
Subprovince: Abitibi
Terrane: Wawa-Abitibi
Belt: Abitibi
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | Massive To Pillowed | Near |
|---|---|---|---|---|
| Ultramafic-Unsubdivided | 2 | Near | ||
| Felsic lava flow-unsubdivided | 3 | Felsite | Host | |
| Feldspar Porphyry | 4 | Feldspar | Porphyritic | Host |
| Vein | 5 | Quartz | Host |
Jun 25, 2013 (G Seim) - The general geology of the East Peninsula of Nighthawk Lake is best described as sheared, faulted, and altered, felsic to ultramafic metavolcanics with occasional ultramafic stocks and felsic intrusives. Structurally, the peninsula is dominated by two major features: the 070º trending Nighthawk Lake Break which follows the north shore of the Peninsula, and the 090 º trending syenite dike which is highly sheared and roughly follows the south shore of the peninsula. Both structures are offset by several cross faults trending 120 º. Gold deposits have been found in some places where either of the 2 major structures are intersected by 120 º cross faults. The diamond drill holes intersected a series of ankerite and fuchsite altered ultramafics and massive to pillowed mafic volcanics. The volcanic package also contained grey to tan colour felsite and pink feldspar porphyry dikes. The gold is located in 0.25 inch white quartz veinlets in grey to tan felsite and pink feldspar porphyry dikes. Although several anomalous gold values were returned, none were over economic widths.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Gold | Economic | Ore | ||||
| 1 | Pyrite | Economic | Gangue | ||||
| 2 | Chalcopyrite | Economic | Gangue | ||||
| Ankerite | Alteration | Carbonatization | 1 | Strong | Replacement | ||
| Fuchsite | Alteration | Carbonatization | 2 | Strong | Replacement |
Jun 25, 2013 (A Wilson) - Significant assays from the Royal Oak diamond drilling program include: 0.124 oz/t Au over 8 ft in HP95-50; 0.116 oz/t Au over 6.8 ft in HP95-51, 0.090 oz/t Au over 1 ft in HP95-263 and 0.075 oz/t Au over 6 ft in HP95-255. Elevated gold values were predominantly found within feldspar porphyry and felsite. Assays from quartz veins in ultramafics include 0.094 oz/t Au over 6 ft in DDH PH95-250. Diamond drilling took place over a strike length of approximately 750 m.
MonoMap - Geology of the Night Hawk Lake area, District of Cochrane
Publication Number: R096 Date: 1971
Author: Leahy E.J.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
Map - Geological Compilation of the Lake Abitibi Area, Abitibi Greenstone Belt
Publication Number: P3398 Scale: 1:100,000 Date: 1999
Author: Ayer J.A., Berger B.R., Trowell N.F.
Publisher Name: Ontario Geological Survey
Location:
Map - Night Hawk Lake area, Cochrane District
Publication Number: M2222 Scale: 1:31,680 Date: 1971
Author: Leahy E.J.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
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