Borehole Number: |
Prospecting Company: De Beers Holdings Botswana |
Prospecting License No.: PL31/88 |
Coordinates Type: WGS 84 |
Coordinates Format: Decimal Degrees (DD) |
Coordinates: -22.704448 , 27.883129 |
Location: Lerala |
Start Drill: N/A |
End Drill: N/A |
Borehole Type: Exploration |
Drilling Method: Core |
Sample Type: Core |
Depth of Surface Casing: N/A |
Azimuth: Degrees |
Hole Inclination: N/A |
Collar Elevation: N/A |
Borehole Water Strike: N/A |
End of Hole (Depth): N/A |
Hole Diameter: N/A |
Log Formation: |
No. | From (m) | To (m) | Log Formation |
---|
1. | 0 | 2 | Dark brown clayey Topsoil. |
2. | 2 | 5 | Yellow calc/silc basement frag + qtz, Amphibolite, kfspar. |
3. | 5 | 23 | Predominantly olive green clay highly weathered green/brown, mottled, gritty kimberlite (gritty in sense that it looks like immature Sandstone) inclusions variable 20-80% kfspar, Amphiboliteibolite. |
4. | 23 | 29 | Kimberlite is mod fresh - fresh below 23m, olive green - grey generally features hypabyssal kimberlite. Inclusions variable 95-5% k-fspar and Amphiboliteibolite. Kimberlite is phlogopite bearing books up to 5mm observed. |
5. | 29 | 30 | 5% inclusions. |
6. | 30 | 32 | 20% inclusions |
7. | 32 | 33 | 10% inclusions. |
8. | 33 | 38 | 5% inclusions. |
9. | 38 | 40 | Fresh grey - green, features hypabyssal kimberlite. |
10. | 40 | 46 | 90% inclusions pale green chloritic qtz. |
11. | 46 | 48 | 95% inclusions. |
12. | 48 | 50 | Amphiboliteibolite and k-fspar - xenolith. |
13. | 50 | 51 | 52m 20% inclusions. |
14. | 51 | 53 | Amphiboliteibolite - xenolith. |
15. | 53 | 59 | 20% inclusions |
16. | 59 | 62 | 20% inclusions - green layered microcrystalline qtz. |
17. | 62 | 65 | 5% inclusions. |
18. | 65 | 70 | 20% inclusions. |
19. | 70 | 72 | 40% inclusions. |
20. | 72 | 79 | Grey, features, phlogopite bearing hypabyssal kimberlite. |
21. | 79 | 82 | 20% inclusions. |
22. | 82 | 85 | 50% inclusions. |
23. | 85 | 89 | 95% inclusions. |
24. | 89 | 97 | 30% inclusions. |
25. | 97 | 110 | Fine, grey, features, phlogopite bearing hypabyssal kimberlite. Inclusions variable 95-5% Amphiboliteibolite and k-feldspar. |
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