Borehole Number: |
Prospecting Company: De Beers Holdings Botswana |
Prospecting License No.: PL001/97 |
Coordinates Type: WGS 84 |
Coordinates Format: Decimal Degrees (DD) |
Coordinates: -21.295676 , 25.540437 |
Location: Orapa |
Start Drill: 2005-08-13 |
End Drill: 2005-08-15 |
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: 952 Metres |
Borehole Water Strike: 59 Metres |
End of Hole (Depth): 71 Metres |
Hole Diameter: 165 Millimetres |
Log Formation: |
No. | From (m) | To (m) | Log Formation |
---|
1. | 0 | 1 | Cream white calcrete mixed with Sandy Topsoil. |
2. | 1 | 9 | Cream white massive calcrete becoming light orange with depth. |
3. | 9 | 13 | Greyish brown, weathered Basalt. |
4. | 13 | 18 | Brownish grey, weathered Basalt. |
5. | 18 | 24 | Greyish greenish, relatively fresh Basalt. |
6. | 24 | 40 | Dark greyish, fresh and competent Basalt characterised by sparkling crystal faces against the sun. |
7. | 40 | 49 | Greyish brown, moderately fresh and competent Basalt with sparkling crystals. |
8. | 49 | 54 | Greyish brown to reddish, relatively fresh and competent, calcite amygdales observed (8-10%). |
9. | 54 | 56 | Greyish greenish, relatively soft kimberlite like Basalt? With lot of empty vescicles as well as partially filled vescicles with dark minerals. |
10. | 56 | 58 | Brownish green, relatively fresh Basalt, calcite amygdales abundant (15%). |
11. | 58 | 65 | Reddish brown, fine-grained (well-sorted) weathered Sandstone, highly contaminated by the overlying Basalt fragments. |
12. | 65 | 71 | Orangish yellow, fine-grained (well-sorted) weathered Sandstone with high Basalt contaminant. |
© Botswana Geoscience Institute 2024 | www.bgi.org.bw | Disclaimer