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Exploration Borehole


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 Borehole Number: 105/17/X920/H01

 
 Prospecting Company: De Beers Holdings Botswana
 Prospecting License No.: PL107/96
 Coordinates Type: WGS 84
 Coordinates Format: Decimal Degrees (DD)
 Coordinates: -21.352815 , 25.235976
 Location: Orapa

 
 Start Drill: 2005-03-15
 End Drill: 2005-03-16
 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: 980 Metres
 Borehole Water Strike: 48 Metres
 End of Hole (Depth): 71 Metres
 Hole Diameter: 165 Millimetres

 
 Log Formation:
No.From (m)To (m) Log Formation
1.0 1Dark brown top Topsoil mixed of Silcrete and calcrete.
2.1 5Very light grey creamish calcrete silcretised.
3.5 10Light grey weathered amygdals and calcite abundant basalt.
4.10 12Medium brown calcite rich weathered basalt.
5.12 16Medium brown reddish fresh competent basalt with few calcite contain.
6.16 20Dark reddish grey competent basalt.
7.20 23Medium greyish brown fresh basalt.
8.23 25Calcite rich yellowish brown fresh basalt.
9.25 28Dark grey competent fresh basalt.
10.28 30Dark grey yellowish competent basalt.
11.30 32Dark reddish yellow oxidised less weathered igneous mafic rock (Gabbro ?) comprising pyrite.
12.32 33Dark greenish grey weathered igneous mafic rock (gabbro ?).
13.33 39Light yellowish orange weathered igneous mafic rock (Gabbro ?) with largest white amygdals.
14.39 42Dark yellowish brown weathered moderately competent igneous mafic rock pyrite observed.
15.42 44Dark green yellowish fresh to moderate competent igneous mafic rock plus pyrite.
16.44 45Light grey creamish weathered igneous mafic rock (Gabbro ?).
17.45 46Dark grey moderate competent Sandstone.
18.46 55Light yellowish pink weathered Sandstone, very fine grained.
19.55 56Light greyish green weathered mudstone fine grained.
20.56 58Dark reddish brown weathered mudstone.
21.58 67Dark reddish brown weathered fine grained Sandstone.
22.67 70Light yellowish orange muddy Sandstone very weathered.
23.70 71Dark brown weathered mudstone.

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