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Exploration Borehole


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 Borehole Number: 105/17/X212/H01

 
 Prospecting Company: De Beers Holdings Botswana
 Prospecting License No.: PL107/96
 Coordinates Type: WGS 84
 Coordinates Format: Decimal Degrees (DD)
 Coordinates: -21.474468 , 24.569426
 Location: Orapa

 
 Start Drill: 2004-08-20
 End Drill: 2004-08-24
 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: 932 Metres
 Borehole Water Strike: 60 Metres
 End of Hole (Depth): 190 Metres
 Hole Diameter: 165 Millimetres

 
 Log Formation:
No.From (m)To (m) Log Formation
1.0 2Surface vegetation: grass and shrub. Dark-grey Topsoil & dull (dirty) cream calcrete.
2.2 8Grey - orange to cream yellowish calcrete.
3.8 17Pale orange Silcrete (fine grained) with cream-yellow Sandy calcrete.
4.17 35Pale-orange & white Sandy calcrete.
5.35 46Dark-red medium graiined Sandstone (poorly consolidated) colour index increases downward.
6.46 60Very hard red-brown coarse grained (matrix free) Sandstone with "dirty" weathering/oxidation (quartzite-like) chips. Water struck at 60m.
7.60 74Grey-red- brown fine grained Sandstone.
8.74 86Grey Sandstone with large (very coarse) up to 10mm size rounded quartz pebbles to 80m. Possibe gravel layer(s) within Sandstone.
9.86 180Mixture of grey & red-brown siltstone with some grey intercalations. Colour gradually changes to brown then orange-brown towards 112 - 115m then greyish at 120m.
10.180 190Grey siltstone. Note the mixture of colour grey & dark-grey. Some chips show dark laminations. E.O.H at 190m in grey siltstone.

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