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Exploration Borehole


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 Borehole Number: 105/17/X462/H01

 
 Prospecting Company: De Beers Holdings Botswana
 Prospecting License No.: PL57/98
 Coordinates Type: WGS 84
 Coordinates Format: Decimal Degrees (DD)
 Coordinates: -21.480405 , 24.491566
 Location: Orapa

 
 Start Drill: 2004-08-31
 End Drill: 2004-09-01
 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: 941 Metres
 Borehole Water Strike: 56 Metres
 End of Hole (Depth): 111 Metres
 Hole Diameter: 165 Millimetres

 
 Log Formation:
No.From (m)To (m) Log Formation
1.0 2Surface vegetation: Mopani & grass, Dark-grey fine Sand.
2.2 11Grey-orange fine Sand, as above with cream-white calcrete.
3.11 23Sandy calcrete, Silcrete & calcrete.
4.23 26Black and greey - orange Silcrete.
5.26 35Grey-orange calcretised Sandstone ( & cream-white).
6.35 54Orange (pinkish) medium to fine grained Sandstone; gradually turns reddish then red at 47mm.
7.54 63Red-brown siltstone 56m. Water at 56m, Coarse to very coarse Sandstone with zeoliths and clasts of siltstone & Bioturbation. Typical gravels: pebbles of quartz (River Channel).
8.63 68Yellow-orange laminated mudstone/siltstone.
9.68 73Brown (red-brown) fine grained oxidised-weathered brown-yellowish Sandstone- affected by Igneous below.
10.73 90Dark-brown (Dark-grey) very fine grained Igneous, fresh and strongly magnetic. Colour: Dark-green (grey) Texture: Very fine Minerals Identified: shiny pyrite-like or chalcopyrite-like. Rock Type: Dolerite/ Basalt/ Basement?
11.90 111Dark-grey very fine grained Igneous-highly magnetic rock. Dolerite? Basalt ? The anomaly is resolved by the magnetic igneous (Basalt/Dolerite?)

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