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Exploration Borehole

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 Borehole Number: 105/12/X016/H1

 Prospecting Company: De Beers Holdings Botswana
 Prospecting License No.: PL51/88
 Coordinates Type: WGS 84
 Coordinates Format: Decimal Degrees (DD)
 Coordinates: -20.62817 , 24.48533
 Location: Dikwalo

 Start Drill: 1900-01-02
 End Drill: 1900-01-02
 Borehole Type: Exploration
 Drilling Method: Core
 Sample Type: Core
 Depth of Surface Casing: N/A
 Azimuth: Degrees
 Hole Inclination: N/A
 Collar Elevation: N/A
 Borehole Water Strike: N/A
 End of Hole (Depth): 169 Metres
 Hole Diameter: N/A

 Log Formation:
No.From (m)To (m) Log Formation
1.0 2Residual Topsoil.
2.2 21Lake sediments: Sandstone: buff coloured, fine to coarse grained, hosting tubular trace fossils (placelites).Intercalated in part with homogenous grey siltstone magnetic susceptibility = 10-20 kx10.
3.21 44(ii) green glaucacitic mudstone strongly laminated and intercalated with this Sandy horizons.mag suscept 20kx10 -6.
4.44 46(iii) Evaporate deposits (green mudstone with abundant gypsum/dolomite euledra).
5.46 48(iv) Rudaceous horizons; cabbles of playa Silcrete (10-20cm) (evaporate deposits mag suscept: 10-20 kx10 -6).
6.48 95Sandstone - dark green, fine grained, friable.
7.95 107Sandstone - fine grained matrix, bioturbated, hosting lenses of grey siltstone.
8.107 111Siltstone - light green, friable, mag suscept = 30 kx10 -6.
9.111 119Sandstone - grey - green, fine grained, mature, hosting pedocasts (clavelites).
10.119 121Sandstone - dark green fine grained (as at 92m) mag suscept = 10 kx10 -6.
11.121 129Sandstone - fine grained, post - calcretisation.
12.129 134Mudstone - dark grey karoo bslt strongly caltered igneous horizon - pervasive dolomite alteration and secondary pyrite crystallisation.
13.134 135Red grey igneous lithology, microcrystalline groundness hosting randomly ariented plagroclase megacrysts (= 1cm).
14.135 169Magnetic susceptibility increases downwards from 40 to 8810 kx10 -6.

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