Borehole Number: |
Prospecting Company: De Beers Holdings Botswana |
Prospecting License No.: PL31/88 |
Coordinates Type: WGS 84 |
Coordinates Format: Decimal Degrees (DD) |
Coordinates: -22.702593 , 27.897864 |
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): 101 Metres |
Hole Diameter: N/A |
Log Formation: |
No. | From (m) | To (m) | Log Formation |
---|
1. | 0 | 1 | Brown Topsoil. |
2. | 1 | 5 | Green macrocrystic kimberlite + kfs gneiss 2 degrees Fe stain qtz rubble. |
3. | 5 | 21 | Olive green fresh (serpentinized) macrocrystic hypabyssal kimberlite inclusions 5-15% kfspar gneiss. |
4. | 21 | 31 | Biotite bearing quartz - feldspathic gneiss. |
5. | 31 | 35 | Dark grey macrocrystic kimberlite. Inclusions variable 95-40% pink kfs gneiss. Inclusions often small & angular possible hypabyssal breccia. |
6. | 35 | 38 | Amphiboliteibolite. |
7. | 38 | 44 | Dark grey macrocrystic hypabyssal brecciated kimberlite, 50% inclusions kfs gneiss. |
8. | 44 | 49 | Green phlogopite rich macrocrystic hypabyssal kimberlite, 5% inclusions. |
9. | 49 | 52 | Coarse grain Amphiboliteibolite. |
10. | 52 | 91 | Olive green weakly macrocrystic hypabyssal kimberlite. Inclusions variable 60% small inclusions (often of order of 1mm). Appears brecciated at times. |
11. | 91 | 101 | Brown grey evenly textured weakly macrocrystic, phlogopite bearing hypabyssal kimberlite 0-2% inclusions. |
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