Borehole Number: |
Prospecting Company: De Beers Holdings Botswana |
Prospecting License No.: PL87/88 |
Coordinates Type: WGS 84 |
Coordinates Format: Decimal Degrees (DD) |
Coordinates: -23.706011 , 22.108291 |
Location: Ghanzi |
Start Drill: 0000-00-00 |
End Drill: 0000-00-00 |
Borehole Type: Exploration |
Drilling Method: Core |
Sample Type: Core |
Depth of Surface Casing: N/A |
Azimuth: 0 Degrees |
Hole Inclination: N/A |
Collar Elevation: N/A |
Borehole Water Strike: Metres |
End of Hole (Depth): N/A |
Hole Diameter: Millimetres |
Log Formation: |
No. | From (m) | To (m) | Log Formation |
---|
1. | 0 | 8 | Off white nodular Sandy calcrete |
2. | 0 | 10 | Loose Sands and calcrete. |
3. | 8 | 10 | Off white-orange nodular Sandy calcrete |
4. | 10 | 13 | Off white to light grey nodular calcrete, very Sandy |
5. | 10 | 50 | Dominantly pink/yellow to off white Sandy calcrete occassionally nodular with Silcrete and calcareous Sandstone. |
6. | 13 | 14 | Off white to light grey nodular calcrete, very Sandy, occassionally pink |
7. | 14 | 16 | Off white to light grey nodular calcrete, very Sandy, occassionally pink, with 50% Silcrete. |
8. | 16 | 18 | Silcrete which becomes calcretised Sandstone (fine to medium grained). |
9. | 18 | 32 | Sandy calcrete with varying proportions or pink Silcrete or calcareous Sandstone. |
10. | 29 | 94 | Pale yellow silty mudstone (with minor weathered calcareous Sandstone). |
11. | 32 | 35 | Off white-light grey calcrete with pink calcareous Sandstone and minor pink Silcrete. |
12. | 35 | 36 | Calcrete becoming off white to pale yellow with minor calcareous Sandstone and Silcrete. |
13. | 36 | 50 | As above- minor variations in relative proportions (poor chip recovery). |
14. | 50 | 51 | Dominantly pale pink fine to medium (occ. coarse) calcareous Sandstone +- calcrete/Silcrete |
15. | 50 | 92 | Pale pink medium grained calcareous Sandstone. |
16. | 51 | 53 | 50/50 calcrete / calcareous Sandstone |
17. | 53 | 62 | Mainly calcareous Sandstone +-calcrete,varying proportions of calcrete to calcareous Sandstone, otherwise fairly uniform. |
18. | 62 | 72 | Varying proportions of pale pink calcareous Sandstone and white cream calcrete - fairly uniform. |
19. | 72 | 92 | Dominantly calcareous Sandstone- medium grained (often coarsening), pink to cream pink in colour. Fairly homogeneous with variations in grain size. |
20. | 92 | 94 | Pale yellow silty mudstone. |
21. | 94 | 96 | Light pink to yellow pink fine grained Sandstone to siltstone. Silt stone often fairly laminated. |
22. | 94 | 100 | Coarse gritty Sandstone. |
23. | 96 | 100 | Sandstone, occasionally coarse and gritty. |
24. | 100 | 113 | Alternating pale yellow /pink laminated siltstone with some fine grained Sandstone (medium-dark pink/red. |
25. | 100 | 120 | Alternating yellow/pink laminated siltstone with fine grained Sandstone. |
26. | 113 | 118 | Yellow/pink siltstone with fine grained Sandstone. |
27. | 118 | 134 | Coarsening to predominantly fine grained Sandstone, colour becoming slightly grey to pink/yellow. |
28. | 120 | 224 | Grey/pink fine grained Sandstone (colour varies with depth, otherwise very homogenous). |
29. | 134 | 139 | Pink/grey (occ. Pale yellow/pink) fine grained Sandstone. |
30. | 139 | 144 | Occasionally light yellow/grey to light pink fine grained Sandstone. |
31. | 144 | 147 | Becoming yellow /orange to pink/grey fine grained Sandstone. |
32. | 147 | 159 | Light grey dirty coarse/gritty Sandstone, occasionally orange/yellow. |
33. | 159 | 161 | Medium to coarse grained orange/yellow pink Sandstone. |
34. | 161 | 168 | Mainly pink fine to medium grained Sandstone. |
35. | 168 | 170 | Becoming dull pink to pink/grey fine to medium grained Sandstone. |
36. | 170 | 224 | As above with some laminated siltstone. Very homogeneous dull grey/pink fine grained Sandstone. |
37. | 224 | 229 | Dark grey/green fine grained dolerite. |
38. | 229 | 237 | Back to light grey - pink brown fine grained (occasionally medium grained) Sandstone, with minor siltstone |
39. | 229 | 238 | Light grey/brown fine grained Sandstone (with minor pyritic siltstone). |
40. | 237 | 238 | Siltstone very pyritic |
41. | 238 | 240 | Dark grey- green slightly weathered dolerite. |
42. | 238 | 246 | Dark grey/green fine grained dolerite. |
43. | 240 | 246 | Dark grey- green slightly weathered crystalline dolerite. |
44. | 246 | 255 | Light grey (very) fine Sandstone. |
45. | 255 | 256 | Dolerite. |
46. | 256 | 260 | Pale grey to green fine grained Sandstone. |
47. | 256 | 270 | Grey/green fine Sandstone. |
48. | 260 | 268 | Light grey fine grained Sandstone. |
49. | 268 | 270 | Light grey laminated fine grained Sandstone. |
50. | 270 | 271 | As above with clean dark grey carbonaceous mudstone. |
51. | 270 | 296 | Dominantly dark grey/black carbonaceous mudstone often pyritic with occassional Coal horizons and minor medium-coarse Sandstone. |
52. | 271 | 296 | Dark grey /black carbonaceous mudstone, often pyritic with Coal fragments and minor medium to coarse Sandstone. Fairly uniform but becomes more pyritic down to T.D of hole |
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