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Exploration Borehole


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 Borehole Number: 105/21/X035
 
 Prospecting Company: De Beers Holdings Botswana
 Prospecting License No.: PL78/88
 Coordinates Type: WGS 84
 Coordinates Format: Decimal Degrees (DD)
 Coordinates: -22.336608 , 22.368456
 Location: Ghanzi
 
 Start Drill: N/A
 End Drill: N/A
 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): N/A
 Hole Diameter: N/A
 
 Log Formation:
No.From (m)To (m) Log Formation
1.0 4Loose Kalahari Sands.
2.4 8Off white to light grey-mottled very Sandy calcrete.
3.8 13As above with trace fossils-worm tubes.
4.13 16Nodular cream/off white calcrete, often very Sandy.
5.16 18Blackened calcrete-many worm tubes.
6.18 20Nodular Sandy calcrete.
7.20 24Minor Silcrete within calcrete (silicified Sandstone|).
8.24 30Nodular Sandy calcrete.
9.30 39Dominantly off white/cream Sandy (nodular) calcrete with minor Silcrete.
10.39 56Gradiational change from a Sandy calcrete to a calcareous Sandstone. By 41m remains very uniform in colour (cream-off white) and grain size. Fine-medium.
11.56 60Calcareous Sandstone with a red/brown highly weathered meta igneous rock-epidiorite.
12.60 66Brown/red-grey-highly weathered meta igneous rock. Probably epidiorite. Much calcite veining, calcite often +30% of chip sample.
13.66 72Becoming fresher-dark grey green fine to very fine grained epidiorite, visible hornblende and plagioclase feldspar crystals in some of the fresher rock.
14.72 86Fresh epidiorite by 72m continues to 86m.
15.86 90Weathered epidiorite and red/brown mudstone with some Sandstone.(fine-medium grained).
16.90 94Pink-light brown siltstone and fine Sandstone.
17.94 118Change to light/medium grey mudstone.

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