Borehole Number: |
Prospecting Company: De Beers Holdings Botswana |
Prospecting License No.: PL107/96 |
Coordinates Type: WGS 84 |
Coordinates Format: Decimal Degrees (DD) |
Coordinates: -21.352815 , 25.235976 |
Location: Orapa |
Start Drill: 2005-03-15 |
End Drill: 2005-03-16 |
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: 980 Metres |
Borehole Water Strike: 48 Metres |
End of Hole (Depth): 71 Metres |
Hole Diameter: 165 Millimetres |
Log Formation: |
No. | From (m) | To (m) | Log Formation |
---|
1. | 0 | 1 | Dark brown top Topsoil mixed of Silcrete and calcrete. |
2. | 1 | 5 | Very light grey creamish calcrete silcretised. |
3. | 5 | 10 | Light grey weathered amygdals and calcite abundant basalt. |
4. | 10 | 12 | Medium brown calcite rich weathered basalt. |
5. | 12 | 16 | Medium brown reddish fresh competent basalt with few calcite contain. |
6. | 16 | 20 | Dark reddish grey competent basalt. |
7. | 20 | 23 | Medium greyish brown fresh basalt. |
8. | 23 | 25 | Calcite rich yellowish brown fresh basalt. |
9. | 25 | 28 | Dark grey competent fresh basalt. |
10. | 28 | 30 | Dark grey yellowish competent basalt. |
11. | 30 | 32 | Dark reddish yellow oxidised less weathered igneous mafic rock (Gabbro ?) comprising pyrite. |
12. | 32 | 33 | Dark greenish grey weathered igneous mafic rock (gabbro ?). |
13. | 33 | 39 | Light yellowish orange weathered igneous mafic rock (Gabbro ?) with largest white amygdals. |
14. | 39 | 42 | Dark yellowish brown weathered moderately competent igneous mafic rock pyrite observed. |
15. | 42 | 44 | Dark green yellowish fresh to moderate competent igneous mafic rock plus pyrite. |
16. | 44 | 45 | Light grey creamish weathered igneous mafic rock (Gabbro ?). |
17. | 45 | 46 | Dark grey moderate competent Sandstone. |
18. | 46 | 55 | Light yellowish pink weathered Sandstone, very fine grained. |
19. | 55 | 56 | Light greyish green weathered mudstone fine grained. |
20. | 56 | 58 | Dark reddish brown weathered mudstone. |
21. | 58 | 67 | Dark reddish brown weathered fine grained Sandstone. |
22. | 67 | 70 | Light yellowish orange muddy Sandstone very weathered. |
23. | 70 | 71 | Dark brown weathered mudstone. |
© Botswana Geoscience Institute 2024 | www.bgi.org.bw | Disclaimer