Ontario Geological Survey
Permanent Link to this Record:
MDI42A09SW00063
| Record Name(s) | Sonic Drill Hole 84-07 - 1984 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1992-Mar-06 |
| Date Last Modified | 2022-Mar-02 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Carr
Latitude: 48° 33' 24.98" Longitude: -80° 26' 23.85"
UTM Zone: 17 Easting: 541325 Northing: 5378355.99 UTM Datum: NAD83
Resident Geologist District: Kirkland Lake
NTS Grid: 42A09SW
Point Location Description: approximate location of collar of sonic drill hole 84-07
Location Method: Data Compilation
Province: Superior
Subprovince: Abitibi
Terrane: Wawa-Abitibi
Belt: Abitibi
Geological Age: Archean
Jan 20, 2016 (A Wilson) - The Quaternary stratigraphy of hole 84-07 has evidence for two glacial advance/withdrawal sequences. Several holes of the 1984 drill program encountered at least two distinct glacial packages. In hole 84-07, the most recent (upper) glacial package extends to a depth of 27.0 m, and consists of varved clays overlying a clast supported gravel which rests directly on a subglacial till. The varved clays were deposited in proglacial lakes Barlow and Ojibway. The gravel unit, which is bisected by a layer of contorted clay and fine sand, may be reworked till or debris flows; the matrix could possibly have been washed away during drilling. The lower glacial package consists of a sequence of glaciolacustrine sand grading downward into glaciofluvial sand overlying till on bedrock. Laboratory data indicates that this till is of different origin than the upper till. The lower till has a sandier matrix, a significantly higher number of gold grains, and elevated geochemical values for the "H" fraction elements Cu, W, Sb, As, and Au. Differences in the geochemical results for the lower till and bedrock, units which are in stratigraphic contact with each other, suggest that the source of the till is not immediately up-ice from the drillhole location. Field work associated with the drillinghas indicated that the ice depositing the upper (younger) and lower tills advanced toward 170º and 240º azimuth, respectively.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Gold | Economic | Ore |
Jan 20, 2016 (A Wilson) - Gold in the heavy mineral geochemistry H fraction returned values of 1300 ppb in Sample 07-01H and 890 ppb Au in 07-12H. A total of twelve gold grains were recovered from samples 07-01, 07-07, 07-09 and 07-12. Sample 07-12 returned 5 gold grains.
| Rank | Characteristic |
|---|---|
| 1 | Disseminated |
Map - Geophysical/geochemical series, sonic drillhole 84-07, Carr Township, District of Cochrane
Publication Number: M80767 Scale: Date: 1986
Author: Steele K.G., McClenaghan M.B., Baker C.L.
Publisher Name: Ontario Geological Survey
Location:
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