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Exploration Borehole


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 Borehole Number: 105/17/X911/H01
 
 Prospecting Company: De Beers Prospecting Botswana (Pty) Ltd
 Prospecting License No.: PL64/99
 Coordinates Type: WGS 84
 Coordinates Format: Decimal Degrees (DD)
 Coordinates: -21.06245 , 24.81491
 Location: Makgadikgadi
 
 Start Drill: 2005-07-04
 End Drill: 2005-07-05
 Borehole Type: Exploration
 Drilling Method: Percussion
 Sample Type: Core
 Depth of Surface Casing: N/A
 Azimuth: 0 Degrees
 Hole Inclination: N/A
 Collar Elevation: N/A
 Borehole Water Strike: 15 Metres
 End of Hole (Depth): 69 Metres
 Hole Diameter: 165 Millimetres
 
 Log Formation:
No.From (m)To (m) Log Formation
1.0 4Dark cream, very fine-grained, cohesive clay-rich Sand, with preserved fossil remains (skeletal bones).No indiator minerals up to the EOH.
2.0 4
3.0 4Dark cream, very fine-grained, cohesive clay-rich Sand, with preserved fossil remains (skeletal bones).No indiator minerals up to the EOH.
4.4 10Dark greenish, calcretised Silcretes (very hard), mixed with calcretised coarse to medium rounded quartz grains in a fine-grained matrix (Sandstone).
5.4 10
6.4 10Dark greenish, calcretised Silcretes (very hard), mixed with calcretised coarse to medium rounded quartz grains in a fine-grained matrix (Sandstone).
7.10 18Light greenish coarse to fine-grained Sandstone, mixed with calcretised Silcretes gravel size fragments (tabular shaped), falling from above.
8.10 18
9.10 18Light greenish coarse to fine-grained Sandstone, mixed with calcretised Silcretes gravel size fragments (tabular shaped), falling from above.
10.18 25Dark greenish, fine-grained Sandstone, weathered highly precipitated by the salt. Gravel size fragments and weathered calcrete are characteristic features.
11.18 25
12.18 25Dark greenish, fine-grained Sandstone, weathered highly precipitated by the salt. Gravel size fragments and weathered calcrete are characteristic features.
13.25 32Light greenish grey, weathered, medium to fine-grained Sandstone, mixed with calcretised Silcrete and gravel size fragments that fall from above.
14.25 32
15.25 32Light greenish grey, weathered, medium to fine-grained Sandstone, mixed with calcretised Silcrete and gravel size fragments that fall from above.
16.32 38Light greyish green, weathered Sandstone (salt precipitate), contaminated by weathered calcrete and Silcrete fragments from above.
17.32 38
18.32 38Light greyish green, weathered Sandstone (salt precipitate), contaminated by weathered calcrete and Silcrete fragments from above.
19.38 41Light green, moderately weathered Sandstone, coarse to medium grained (sugary texture), heavily contaminated by the overlying sediments.
20.38 41
21.38 41Light green, moderately weathered Sandstone, coarse to medium grained (sugary texture), heavily contaminated by the overlying sediments.
22.41 47Light greenish, fine-grained muddy siltstone mixed with light brown to orange siltstone. Also highly contaminated by the overlying sediments.
23.41 47
24.41 47Light greenish, fine-grained muddy siltstone mixed with light brown to orange siltstone. Also highly contaminated by the overlying sediments.
25.47 60Greyish green to orangish muddy siltstone mixed with light greyish green siltstone. Calcretised Sandstone and Silcrete fragments washed down by high pressure water are characteristic features. Sand from water strike zones also abundant. Pyrite like minera
26.47 60
27.47 60Greyish green to orangish muddy siltstone mixed with light greyish green siltstone. Calcretised Sandstone and Silcrete fragments washed down by high pressure water are characteristic features. Sand from water strike zones also abundant. Pyrite like minera
28.60 69Light greyish silty mudstone, mixed with or contaminated by brownish orange siltstone from above. Sandstone gravel size fragments are abundant. Pyrite like mineral observed in concentrate.
29.60 69
30.60 69Light greyish silty mudstone, mixed with or contaminated by brownish orange siltstone from above. Sandstone gravel size fragments are abundant. Pyrite like mineral observed in concentrate.

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