Borehole Number: |
Prospecting Company: De Beers Holdings Botswana |
Prospecting License No.: PL57/98 |
Coordinates Type: WGS 84 |
Coordinates Format: Decimal Degrees (DD) |
Coordinates: -20.999932 , 25.082797 |
Location: Orapa |
Start Drill: 2004-08-06 |
End Drill: 2004-08-10 |
Borehole Type: Exploration |
Drilling Method: Percussion & Core |
Sample Type: Core & Chips |
Depth of Surface Casing: N/A |
Azimuth: Degrees |
Hole Inclination: -90 Degrees |
Collar Elevation: 901 Metres |
Borehole Water Strike: N/A |
End of Hole (Depth): 183 Metres |
Hole Diameter: 165 Millimetres |
Log Formation: |
No. | From (m) | To (m) | Log Formation |
---|
1. | 0 | 3 | Pale-orange fine Sand ,Topsoil and black Silcrete (dark-grey). |
2. | 3 | 16 | Dark-grey massive Silcrete, Grey-greenish (medium - olive) fine matrix supporting coarse & medium rounded quartz grains. Green medium grained Sandstone (9 - 16m). |
3. | 16 | 19 | Grey medium grained Sandstone and rounded large (1cm in size) quartz clasts (gravels). |
4. | 19 | 26 | Very fine grained grey (silicified) Sandstone coarsens downward to 28m (with some green lithics at the base. |
5. | 26 | 30 | Dark-brown very fine grained laminated Sandstone, underlain by a red-brown mudstone. |
6. | 30 | 35 | Grey-green mudstone (60%-70%) & red-brown mudstone (30 - 40%). |
7. | 35 | 50 | Red-brown mudstone (some purplish). |
8. | 50 | 65 | Pale-grey (greenish) mudstone/silstone.. |
9. | 65 | 90 | Essentially greey mudstone but with dark-brown-greyish, to pale-orange horisons. |
10. | 90 | 105 | Grey pale-orange (greenish-brown) siltstone. |
11. | 105 | 125 | Siltstone: Slight colour change at 105m from pale orange (brownish) to grey.. |
12. | 125 | 156 | Grey siltstone. |
13. | 156 | 164 | Shining crystals of Pyrite (?) in a dark-grey siltstone. Grey siltstone with black mudstone/siltstone Coal lenses. |
14. | 164 | 168 | Dark-grey Coally siltstone. |
15. | 168 | 183 | Black Coally mudstone with Coal lenses to the end of hole at 183m. . |
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