| Borehole Number: |
| Prospecting Company: De Beers Holdings Botswana |
| Prospecting License No.: PL31/88 |
| Coordinates Type: WGS 84 |
| Coordinates Format: Decimal Degrees (DD) |
| Coordinates: -22.704432 , 27.883483 |
| Location: Lerala |
| 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: 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 | 1 | Brown Topsoil. |
| 2. | 1 | 3 | Nodular silc/calcrete. |
| 3. | 3 | 9 | Predominantly yellow green Clays (3-9m) olive brown - green weathered brecciated macro - crystic kimberlite + 40% inclusions k - feldspar, Amphibolite, qtz. |
| 4. | 9 | 28 | 9-26 predominantly green kimberlitic Clays, weathered, brecciated, brown kimberlite. Chips tend to be v.angular where chips break around surface of inclusions. This weathered brown kimberlite often has the appearance of a soft immature Sandstone. Sometime |
| 5. | 28 | 54 | Moderately fresh to fresh kimberlite. |
| 6. | 54 | 56 | Dark olive green - grey generally features, phlogopite bearing kimberlite. Other than occasional |
| 7. | 56 | 62 | Pale green chloritic feldspar - xenolith. |
| 8. | 62 | 67 | Olive green, phlogopite bearing, features kimberlite. |
| 9. | 67 | 71 | Green mottled, chloritic, Amphiboliteibole bearing feldspar + qtz (feldsite). |
| 10. | 71 | 85 | Drab olive green, phlogopite bearing, featureless hypabyssal kimberlite. Phlogopite content appears to be increasing downwards, inclusions 10% kfs, qtz. |
| 11. | 85 | 87 | 85m propable xenolith, green mottled chloritised Amphiboliteibole bearing felsite. |
| 12. | 87 | 90 | 87m 80% of sample is green mottled felsite - xenolith. |
© Botswana Geoscience Institute 2024 | www.bgi.org.bw | Disclaimer