Borehole Number: |
Prospecting Company: De Beers Prospecting Botswana (Pty) Ltd |
Prospecting License No.: PL64/99 |
Coordinates Type: WGS 84 |
Coordinates Format: Decimal Degrees (DD) |
Coordinates: -20.99831 , 24.89869 |
Location: Makgadikgadi |
Start Drill: 2005-07-05 |
End Drill: 2005-07-12 |
Borehole Type: Exploration |
Drilling Method: Percussion |
Sample Type: Core |
Depth of Surface Casing: N/A |
Azimuth: Degrees |
Hole Inclination: N/A |
Collar Elevation: N/A |
Borehole Water Strike: 56 Metres |
End of Hole (Depth): 77 Metres |
Hole Diameter: 165 Millimetres |
Log Formation: |
No. | From (m) | To (m) | Log Formation |
---|
1. | 0 | 3 |
2. | 0 | 3 | Yellowish brown, very fine-grained, clay-rich (cohesive) Sand mixed with weathered calcrete. No indicator minerals observed up to the end of hole. |
3. | 0 | 3 | Yellowish brown, very fine-grained, clay-rich (cohesive) Sand mixed with weathered calcrete. No indicator minerals observed up to the end of hole. |
4. | 3 | 5 |
5. | 3 | 5 | Pale green to light brown weathered calcrete and Silcrete. |
6. | 3 | 5 | Pale green to light brown weathered calcrete and Silcrete. |
7. | 5 | 12 |
8. | 5 | 12 | Pale green calcretised Silcrete (very hard) mixed with calcretised tabular shaped coarse grained Silcrete fragments. |
9. | 5 | 12 | Pale green calcretised Silcrete (very hard) mixed with calcretised tabular shaped coarse grained Silcrete fragments. |
10. | 12 | 22 |
11. | 12 | 22 | Light greenish to grey, medium to coarse grained calcretised Silcrete fragments, with high clay content. |
12. | 12 | 22 | Light greenish to grey, medium to coarse grained calcretised Silcrete fragments, with high clay content. |
13. | 22 | 30 |
14. | 22 | 30 | Greenish grey, medium to coarse grained calcretised Sandstone with tabular shaped (stalagmides and stalagtides like). Highly contaminated by the overlying Silcrete. |
15. | 22 | 30 | Greenish grey, medium to coarse grained calcretised Sandstone with tabular shaped (stalagmides and stalagtides like). Highly contaminated by the overlying Silcrete. |
16. | 30 | 41 |
17. | 30 | 41 | Pale greenish to grey, very fine-grained calcretised Sandstone (very hard). |
18. | 30 | 41 | Pale greenish to grey, very fine-grained calcretised Sandstone (very hard). |
19. | 41 | 46 |
20. | 41 | 46 | Greenish brown, medium to coarse grained, moderately weathered igneous rock, characterised by calcite and metallic shiny platey minerals randomly oriented.- highly magnetic.(Dolerite or Basalt?) |
21. | 41 | 46 | Greenish brown, medium to coarse grained, moderately weathered igneous rock, characterised by calcite and metallic shiny platey minerals randomly oriented.- highly magnetic.(Dolerite or Basalt?) |
22. | 46 | 64 |
23. | 46 | 64 | Dark grey to black, very fresh and competent igneus rock with shiny metallic mineral and calcite. The magnetic susceptibility of the unit is very high. |
24. | 46 | 64 | Dark grey to black, very fresh and competent igneus rock with shiny metallic mineral and calcite. The magnetic susceptibility of the unit is very high. |
25. | 64 | 77 |
26. | 64 | 77 | Dark grey to black, very fresh and competent igneus rock with shiny metallic minerals decreasing with depth and calcite. The magnetic susceptibility of the unit is very high. |
27. | 64 | 77 | Dark grey to black, very fresh and competent igneus rock with shiny metallic minerals decreasing with depth and calcite. The magnetic susceptibility of the unit is very high. |
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