Ontario Geological Survey
Permanent Link to this Record:
MDI42A07NE00022
| Record Name(s) | Sonic Drill Hole 84-28 - 1984 |
|---|---|
| Related Record Type | Simple |
| Record Status | Discretionary Occurrence |
| Date Created | 1992-Mar-05 |
| Date Last Modified | 2022-Jan-05 |
| Created By | Q Unknown |
| Revised By | A Wilson |
Primary Commodities: Gold
Secondary Commodities: Copper, Tungsten
Township or Area: Currie
Latitude: 48° 29' 38.86" Longitude: -80° 38' 27.07"
UTM Zone: 17 Easting: 526534 Northing: 5371285 UTM Datum: NAD83
Resident Geologist District: Kirkland Lake
NTS Grid: 42A07NE
Point Location Description: Precise
Location Method: Data Compilation
Province: Superior
Subprovince: Abitibi
Terrane: Wawa-Abitibi
Belt: Abitibi
Geological Age: Archean
Dec 08, 2015 (A Wilson) - The Quaternary stratigraphy of hole 84-28 shows evidence for two and possibly three glacial advance/withdrawal sequences. Several holes in the 1984 drill program encountered at least two distinct glacial packages. In hole 84-28. The most recent glacial package extends to a depth of 24.8 m, and consists of a simple sequence of clay varves grading downward into proximal silty varves overlying a subglacial till. These sediments and the till(s) below are separated by lacustrine sediments which were deposited during an interglacial period. All laboratory data, and the matrix texture, indicate that the till encountered between 35.4 m and 36.6 m is of different origin from tills above and below it. This till and the 9.8 m of clay and silt directly above it, may represent a separate glacial package. A less likely alternative is that the till in this interval may be the uppermost debris flows or melt-out layers of the lower glacial package. All till layers below 39.6 m were deposited during the same glacial advance, though the uppermost interval (39.6 to 40.5 m) may have had different transport and deposition mechanisms. This interval has slightly different mineralogical data (lower rutile content), gold grain counts, and geochemical results (lower gold, arsenic, and copper content) when compared with the till below. All till below 40.8 m was probably deposited either subglacially in an environment with extensive ponded meltwater or by debris flows off the ice front into a proglacial lake. These would explain the abundant clay seams interlayered with the till.
Dec 08, 2015 (A Wilson) - Samples 28-09 to 28-20 returned gold values ranging from 490 ppb to 8800 ppb. Abundant gold grains were obtained from 9 separate samples. Tungsten in Sample 28-17 was 500 ppm.
| Rank | Characteristic |
|---|---|
| 1 | Disseminated |
Map - Geophysical/geochemical series, sonic drillhole 84-28, Currie Township, District of Cochrane
Publication Number: M80760 Scale: Date: 1986
Author: Steele K.G., McClenaghan M.B., Baker C.L., Jensen L.S., Trowell N.F.
Publisher Name: Ontario Geological Survey
Mono - Rotasonic drilling operations (1984) and overburden heavy mineral studies, Matheson area, District of Cochrane
Publication Number: OFR5569 Scale: Date: 1986
Author: Averill S.A., MacNeill K.A., Huneault R.G., Baker C.L.
Publisher Name: Ontario Geological Survey
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