| Borehole Number: |
| Prospecting Company: De Beers Holdings Botswana |
| Prospecting License No.: PL31/88 |
| Coordinates Type: WGS 84 |
| Coordinates Format: Decimal Degrees (DD) |
| Coordinates: -22.703289 , 27.883509 |
| 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 | Topsoil |
| 2. | 1 | 2 | Mixture of Topsoil + Silcrete. Fragments of black Amphiboliteibolite visible, occasional pink felsic basement fragments common. |
| 3. | 2 | 10 | Mixture of recognizable kimberlite & black Amphiboliteibolite & felsic basement. |
| 4. | 10 | 25 | Clay contant high. |
| 5. | 25 | 33 | Basement Amphiboliteibolite with well defined metamorphic linear fabric Amphiboliteibolite fresh, unweathered. |
| 6. | 33 | 35 | Basement Amphiboliteibolite with well defined metamorphic texture. |
| 7. | 35 | 39 | Amphiboliteibolite fresh, unweathered. |
| 8. | 39 | 42 | Green igneous rock - sugary texture grains interlock - possible diorite. |
| 9. | 42 | 50 | Soft blue fine grained rock showing no texture. Chews to blue clay - micas visible - hyperbyssal kimberlite. |
| 10. | 50 | 63 | Minor portion of chips consists of blue kimberlite, major portion consists of Amphiboliteibolite & felsic basement fragments. Blue chips with dark micas present, but rare - TKB. |
| 11. | 63 | 77 | Majority of chips basement & Amphiboliteibolite fragments. Rare kimberlite chips present - TKB. |
| 12. | 77 | 83 | Hypabyssal phase - consists of fine grained blue rock with occasional brown micas. No basement fragments. |
| 13. | 83 | 89 | Majority of chips basement & fragments. Rare kimberlite fragments, occasional dark micas (phlogopites) visible - TKB. |
| 14. | 89 | 98 | Small fissure - chips damp with blue Clays. |
| 15. | 98 | 110 | Majority of chips basement & Amphiboliteibolite fragments, & occasional dark micas (phlogopites) visible - TKB. |
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