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Exploration Borehole


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 Borehole Number: 105/18/X625/H01

 
 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 1Cream white calcrete mixed with Sandy Topsoil.
2.1 9Cream white massive calcrete becoming light orange with depth.
3.9 13Greyish brown, weathered Basalt.
4.13 18Brownish grey, weathered Basalt.
5.18 24Greyish greenish, relatively fresh Basalt.
6.24 40Dark greyish, fresh and competent Basalt characterised by sparkling crystal faces against the sun.
7.40 49Greyish brown, moderately fresh and competent Basalt with sparkling crystals.
8.49 54Greyish brown to reddish, relatively fresh and competent, calcite amygdales observed (8-10%).
9.54 56Greyish greenish, relatively soft kimberlite like Basalt? With lot of empty vescicles as well as partially filled vescicles with dark minerals.
10.56 58Brownish green, relatively fresh Basalt, calcite amygdales abundant (15%).
11.58 65Reddish brown, fine-grained (well-sorted) weathered Sandstone, highly contaminated by the overlying Basalt fragments.
12.65 71Orangish yellow, fine-grained (well-sorted) weathered Sandstone with high Basalt contaminant.

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