Ontario Geological Survey
Permanent Link to this Record:
MDI42A10SW00020
| Record Name(s) | Syenite West Zone - 1986, Pamour DDH SER-86-5 - 1986, Ronnoco South - 1986 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Apr-03 |
| Date Last Modified | 2022-Sep-22 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Macklem
Latitude: 48° 30' 39.36" Longitude: -80° 53' 51.26"
UTM Zone: 17 Easting: 507565 Northing: 5373096 UTM Datum: NAD83
Resident Geologist District: Timmins
NTS Grid: 42A10SW
Point Location Description: drill collar for SER-86-5
Location Method: Based on Assessment
1986: Pamour Inc. - ground geophysics, RCD - 20, DD-8-5070 ft
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| T-2313 / OM86-5P-197 / 63.4921 | 42A11SE8407 | 42A11SE8407 |
Province: Superior
Subprovince: Abitibi
Terrane: Wawa-Abitibi
Belt: Abitibi
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | Basalt, Carbonate Altered | Host |
|---|---|---|---|---|
| Syenite | 2 | Syenite | Feldspar Porphyry | Host |
| Ultramafic-Unsubdivided | 3 | Serpentinized | Near | |
| Intermediate lava flow-unsubdivided | 4 | Dacite | Adjacent |
Jun 24, 2013 (G Seim) - The Syenite Zone West was targeted by drillholes SER-86-1 through 86-8 inclusive. The first 4 holes failed to intersect the syenite, but hole 86-2 did encounter weak gold mineralization in a dacitic tuff and in carbonate altered, spherulitic basalt mineralized with trace to 5% pyrite. The best values were 0.030 opt Au over 6 ft. from 358.5 ft. to 364.5 ft. down the hole and 0.29 opt Au over 2.0 ft. from 339 to 341 ft. in hole SER-86-2. Holes SER-86-5 through SER-86-8 intersected a gold-bearing syenite porphyry. The strike of the syenite body is suspected to be 090 azimuth with a dip of approximately 80 S, but the body is highly cross-faulted. The thickness of the syenite is estimated at 80 ft. including up to 25% carbonatized mafic volcanic country rock. The gold tenor of the porphyry is erratic, but higher values are generally associated with increasing disseminated pyrite content, averaging 10% in the higher grade sections.
Jun 24, 2013 (A Wilson) - The syenite is highly cross-faulted; it strikes 90º and dips approximately 80º S. The thickness of the syenite body is estimated to be 80 feet, including up to 25% lenses of carbonated rock and mafic metavolcanics within it.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Pyrrhotite | Economic | Ore | ||||
| 3 | Chalcopyrite | Economic | Ore | ||||
| Carbonate | Alteration | Carbonatization | 1 | Extreme | Replacement | ||
| Fuchsite | Alteration | Carbonization | 2 | Extreme | Replacement | ||
| Quartz | Alteration | Silicification | 3 | Medium | Replacement |
Jun 24, 2013 (G Seim) - SER-86-5 contained an intersection of 0.041 opt Au over 41 ft. including 0.187 opt Au over 4 ft. within the syenite porphyry and 0.028 oz/t Au over 14 ft in carbonatized basaltic flows containing up to 5% stringer and disseminated pyrrhotite. Several 4 to 5 foot intervals within the basalt returned gold values between 0.010 and 0.40 oz/t Au. ( A.A. was the analytical method used, the same intervales returned tr. when fire assayed.) SER-86-6 returned values greater than 0.01 oz/t Au through the carbonatized basalt where assayed by A.A. and up to 0.035 oz/t Au for an interval of altered basalt and syenite porphyry containing up to 5% py. SER-86-7 had an interval porphyry return 0.019 oz/t Au over a 47 ft. including 0.028 oz/t Au over 20.5 ft ( A.A. analytical method) and a high of 0.063 oz/t over 5.0 ft. (fire assay) SER-86-8 returned 35.5 averaging 0.017 oz/t Au from an interval of altered andesitic basalt intruded by several syenite porphyry dikes. Pyrite concentrations range up to 10%.
Jun 24, 2013 (A Wilson) - Gold values are erratically distributed within the porphyry and higher values are generally associated with increasing disseminated pyrite content, averaging 10% in the higher grade sections.
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 - 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:
Map - Manitouwadge area, Gemmell Township, District of Thunder Bay
Publication Number: P0548 Scale: 1:9,600 Date: 1997
Author: Milne V.G.
Publisher Name: Ontario Dept. of Mines
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:
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