Welcome | Search Borehole BGI | Exploration Borehole

Exploration Borehole


	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

Surface vegetation: Mopani & grass, Dark-grey fine Sand.

Grey-orange fine Sand, as above with cream-white calcrete.

Sandy calcrete, Silcrete & calcrete.

Black and greey - orange Silcrete.

Grey-orange calcretised Sandstone ( & cream-white).

Orange (pinkish) medium to fine grained Sandstone; gradually turns reddish then red at 47mm.

Red-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).

Yellow-orange laminated mudstone/siltstone.

Brown (red-brown) fine grained oxidised-weathered brown-yellowish Sandstone- affected by Igneous below.

10.

Dark-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.

111

Dark-grey very fine grained Igneous-highly magnetic rock. Dolerite? Basalt ? The anomaly is resolved by the magnetic igneous (Basalt/Dolerite?)