Borehole Number: |
Prospecting Company: De Beers Holdings Botswana |
Prospecting License No.: PL107/96 |
Coordinates Type: WGS 84 |
Coordinates Format: Decimal Degrees (DD) |
Coordinates: -21.02557 , 24.62122 |
Location: Khoekhe |
Start Drill: 2005-09-02 |
End Drill: 2005-09-06 |
Borehole Type: Exploration |
Drilling Method: Core |
Sample Type: Core |
Depth of Surface Casing: N/A |
Azimuth: Degrees |
Hole Inclination: N/A |
Collar Elevation: N/A |
Borehole Water Strike: 11 Metres |
End of Hole (Depth): 191 Metres |
Hole Diameter: 165 Millimetres |
Log Formation: |
No. | From (m) | To (m) | Log Formation |
---|
1. | 0 | 1 | Light yellowish, fine-grained loose Sand. |
2. | 1 | 10 | Light to dark greenish, calcretised Silcrete (very hard). |
3. | 10 | 36 | Brownish to yellowish green, calcretised tabular shaped (elongated needle like) mixture of Silcrete (very hard) and Sandstone (gravel size fragments referred to as pan sediments). |
4. | 36 | 41 | Cream whitish, calcretised (weathered), medium to coarse grained Sandstone characterised by abundant quartz clasts. |
5. | 41 | 54 | Greyish green to brownish, silty Mudstone, highly contaminated by the overlying Kalahari sediments. |
6. | 54 | 58 | Yellowish brown (orangish), thinly laminated silty Mudstone. Pyrite observed in concentrate. |
7. | 58 | 62 | Dark brownish to light yellowish, thinly laminated Mudstone. |
8. | 62 | 69 | Yellowish orange, weathered, thinly laminated silty Mudstone. Pyrite recovered in concentrate. |
9. | 69 | 90 | Reddish brown, oxidised, thinly laminated silty Mudstone. Pyrite observed in concentrate. |
10. | 90 | 146 | Dark greyish to black (darkening with depth), thinly laminated carbonaceous (Coally), pyrite rich Mudstone. |
11. | 146 | 149 | Cream white, fine to medium grained weathered Sandstone. |
12. | 149 | 179 | Dark greyish to black, thinly laminated carbonaceous (Coally) Mudstone with super abundant pyrite. |
13. | 179 | 183 | Dark greyish (black), carbonaceous (Coally), thinly laminated Mudstone, rich in pyrite, with increasing sediment contaminant with depth. |
14. | 183 | 191 | Light brown, medium grained, weathered micaceous Sandstone. |
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