Welcome | Search Borehole BGI | Exploration Borehole

Exploration Borehole


	Borehole Number: 105/17/X569/H01


	Prospecting Company: De Beers Holdings Botswana
	Prospecting License No.: PL57/98
	Coordinates Type: WGS 84
	Coordinates Format: Decimal Degrees (DD)
	Coordinates: -20.999932 , 25.082797
	Location: Orapa


	Start Drill: 0000-00-00
	End Drill: 0000-00-00
	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: 901 Metres
	Borehole Water Strike: N/A
	End of Hole (Depth): 183 Metres
	Hole Diameter: 165 Millimetres


	Log Formation:

No.	From (m)	To (m)	Log Formation

Pale-orange fine Sand ,Topsoil and black Silcrete (dark-grey).

Dark-grey massive Silcrete, Grey-greenish (medium - olive) fine matrix supporting coarse & medium rounded quartz grains. Green medium grained Sandstone (9 - 16m).

Grey medium grained Sandstone and rounded large (1cm in size) quartz clasts (gravels).

Very fine grained grey (silicified) Sandstone coarsens downward to 28m (with some green lithics at the base.

Dark-brown very fine grained laminated Sandstone, underlain by a red-brown mudstone.

Grey-green mudstone (60%-70%) & red-brown mudstone (30 - 40%).

Red-brown mudstone (some purplish).

Pale-grey (greenish) mudstone/silstone..

Essentially greey mudstone but with dark-brown-greyish, to pale-orange horisons.

10.

105

Grey pale-orange (greenish-brown) siltstone.

11.

105

125

Siltstone: Slight colour change at 105m from pale orange (brownish) to grey..

12.

125

156

Grey siltstone.

13.

156

164

Shining crystals of Pyrite (?) in a dark-grey siltstone. Grey siltstone with black mudstone/siltstone Coal lenses.

14.

164

168

Dark-grey Coally siltstone.

15.

168

183

Black Coally mudstone with Coal lenses to the end of hole at 183m. .