Ontario Geological Survey
Permanent Link to this Record:
MDI31M05SE00167
| Record Name(s) | Botha Lake - 1960 |
|---|---|
| Related Record Type | Compound |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1991-Feb-20 |
| Date Last Modified | 2022-Mar-02 |
| Created By | |
| Revised By |
Primary Commodities: Cobalt, Silver
Secondary Commodities: Gold
Township or Area: Gillies Limit
Latitude: 47° 17' 29.8" Longitude: -79° 39' 8.5"
UTM Zone: 17 Easting: 601895.62 Northing: 5238451.21 UTM Datum: NAD83
Resident Geologist District: Kirkland Lake
NTS Grid: 31M05SE
Point Location Description: Old shaft
Location Method: Data Compilation
1960: Botha Lake Mining Company – geophysics, radiograph survey; DD-15; 1950: J. Price – DD-2; 1960: Rayrock Mines – DD-5. 1993: Gerry O’Reilly – sampling, assays. 1993: Falconbridge Limited Exploration – line-cutting; geological mapping; lithogeological sampling. 2000: Prairie C Resource Property Development: magnetometer survey, sampling. 2004: Cabo Mining Enterprises Corp. – geological mapping. 2004: Clear View Geophysics Inc. – magnetic survey. VEINS: UP TO 8 CM, REF INDEX: (2) TRENCH MAP;(3)D DRILLING;(4) RPT., ADIT MAP;(5) DIAMOND DRILL GEOL-MAP, RPT, ADJACENT OCCURRENCE: SEVERAL SURROUNDING SHOWINGS AU REPORTED NE (REF 2).
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| OP93-630 | 31M05SE0031 | 31M05SE0031 |
| 2.15162 | 31M05SE9800 | 31M05SE9800 |
| 2.20688 | 31M05SE2018 | 31M05SE2018 |
| 2.28896 | 31M05SE2076 | 31M05SE2076 |
| 2.28057 | 31M05SE2070 | 31M05SE2070 |
Province: Southern
Subprovince: Cobalt Basin
Supergroup: Huronian Supergroup
Formation Group: Cobalt Group
Geological Age: Paleoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Mafic pillowed flow | 1 | Pillowed | Host |
|---|---|---|---|---|
| Gabbroid-Unsubdivided | 2 | Hanging Wall | ||
| Conglomerate | 3 | Conglomerate | Intrudes | |
| Gabbroid-Unsubdivided | 4 | Host |
Aug 14, 2017 (A Wilson) - Two north-northwest trending inliers of Archean volcanic rocks bisect the centre of the property with Nipissing diabase underlying the southwest and Archean granite and Coleman Member Huronian sedimentary rocks underlying the northeast portions of the grid. (Previous drilling has documented that Nipissing diabase also underlies the volcanic rocks). The Nipissing diabase consists of a more leucocratic gabbro than the diabase on the Montreal River grid and is locally granophyric indicating proximity to the top of the intrusion. The Coleman Member consists of matrix supported pebble greywacke to clast supported conglomerate. Fragments consist mostly of rounded medium grained granite but a variety of volcanic and mafic dyke clasts also occur locally. Local zones also contain quite angular clasts (regolith?).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Silver | Economic | Ore | ||||
| 3 | Galena | Economic | Gangue |
Aug 14, 2017 (A Wilson) - Mineralization is less extensive than on the Montreal River grid, and consists of pyrite only, no base metal sulphides were seen. The pyrite occurs along fractures, as small patchy zones and as disseminated blebs within amygdules. Local weakly gossanous zones contain up to 5% fracture controlled and disseminated pyrite, some zones may be associated with weak shearing. A patchy pyrite zone (L6E/75N) within a zone of silicification (L4E to L6E/100N) returned 0.5 ppm Au. The types of sulphide mineralization which occur on the property consist of the following styles: Along primary porosity such as amygdules, pillow selvages, disseminations and along lithological contacts. Disseminated and laminated exhalative. Along secondary porosity such as fractures and chlorite spots (assuming chlorite spotting is not primary). Mineralization thought to be syn-volcanic consists of only pyrite and occurs as a fine disseminated weakly laminated dusting in cherty interflow sediments (2-3% pyrite, LI 1W/200N). A 10 metre wide zone of pyrite also occurs (L1250W to 1100W/500N) within the mafic pillowed volcanics (possibly at a flow contact). The zone consists of pyrite focused within the selvages and as layers along the foliation (stringer veins, disseminations later remobilized along foliation?). A 1 metre wide massive pyrite layer occurs at the top of the zone (assuming stratigraphic tops are to the south). No elevated Cu or Zn values are associated with the pyrite zone. A good representative (un-leached) sample of the massive zone however, was not possible due to extensive weathering. This zone of mineralization is spatially and possibly genetically related to the zone of pervasive alteration silicification described in alteration.
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 1991 | 1 | MDI |
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