Ontario Geological Survey
Permanent Link to this Record:
MDI42A06NE00112
| Record Name(s) | Collin-Grant Trench # 3 - 1994, Big Dyke Extension Trench # 3 - 1994 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2002-Oct-30 |
| Date Last Modified | 2023-Mar-03 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Deloro
Latitude: 48° 25' 9.44" Longitude: -81° 13' 22.46"
UTM Zone: 17 Easting: 483507.392 Northing: 5362928.082 UTM Datum: NAD83
Resident Geologist District: Timmins
NTS Grid: 42A06NE
Point Location Description: Trench # 3 on the Big Dyke Extension property as shown on the geology map in T-3673
Location Method: Based on Assessment
Access Description: A gravel road leads south from the community of houses to the west of the Buffalo Ankerite mine. About 1 km south of the community, a secondary road leads east to the Powell prospect. Just before the Powell prospect stripped area, a brush road leads south to the Big Dyke Extension property with a winter road providing walkable passage to the north boundary of the claim group.
In 1994, J. Grant and Y. Collin conducted an OPAP funded program on a group of claims known as the Big Dyke Extension property. The work program included geological mapping, magnetometer and VLF surveys and the excavation, washing, mapping and sampling of 5 trenches. Samples from trenches 3, 4 and 5 returned occurrence grade gold values.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| T-3673, OP92-070 | 42A06NE0023 | 42A06NE0023 |
| 2.15637, T-3673 | 42A06NE0022 | 42A06NE0022 |
Province: Superior
Subprovince: Abitibi
Terrane: Wawa-Abitibi
Belt: Abitibi
Tectonic Assemblage: Deloro
Geological Age: Archean
Dec 07, 2005 (G Seim) - This occurrence is contained within mafic to intermediate, calc-alkaline mafic metavolcanic flows. Mapping by J.Grant in 1994 found the volcanic rock varied in composition from basalt to andesitic basalt from the northwest to the southeast. Trench #3 is located within the area of andesitic basalt. J. Grant reported that Trench #3 was excavated to test a magnetic high. Prospecting of the area noted heavy iron staining and abundant quartz veining in the area with abundant sulphide stringers and veinlets. Several areas of chalcopyrite smears were also noted. The trench exposed carbonatized andesitic basalt and a 60 cm to 1 m wide dike of ultramafic rock. Abundant north-striking, vertically dipping quartz veins cut the volcainc rock and vary in width up to 45 cm. The quartz veins appeared to be barren of sulphides, but the wall rock to the veins contained sulphide. J. Grant reported anayltical results for 7 grab samples. Gold values ranged from 83 ppb in quartz to 1335 ppb in a sample of mafic metavolcanic rock off the north end of the same quartz vein.
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | Basalt To Andesitic Basalt | Flows | Host |
|---|---|---|---|---|
| Vein | 2 | Quartz | Host | |
| Ultramafic-Unsubdivided | 3 | Near |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Gangue | ||||
| 2 | Chalcopyrite | Economic | Gangue | ||||
| Carbonate | Alteration | Carbonatization | 1 | Medium | Replacement |
Dec 07, 2005 (G Seim) - See the Geology Screen for analytical results.
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For detailed information regarding this mineral record please contact the Timmins Resident Geologist District Office