Picture Not Available
Welcome | Search Borehole BGI | Exploration Borehole

Exploration Borehole

Print PDF
 Borehole Number: 105/17/X723/H01

 Prospecting Company: De Beers Holdings Botswana
 Prospecting License No.: PL107/96
 Coordinates Type: WGS 84
 Coordinates Format: Decimal Degrees (DD)
 Coordinates: -21.307646 , 25.1743
 Location: Orapa

 Start Drill: 2005-03-14
 End Drill: 2005-03-15
 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: 951 Metres
 Borehole Water Strike: 71 Metres
 End of Hole (Depth): 173 Metres
 Hole Diameter: 165 Millimetres

 Log Formation:
No.From (m)To (m) Log Formation
1.0 1Dark brown Sanddy top Topsoil.
2.1 6Very light grey creamish calcretised Silcrete ( coarse fragment observed).
3.6 11Medium brown fresh Silcrete plus few calcrete.
4.11 12Red brown weathered basalt.
5.12 16Yellow brownish moderate competent calcite rich basalt.
6.16 21Dark grey brownish pyroclastic materials (basalt, Silcrete and mudstone pieces observed).
7.21 23Dark red brown calcite and amygdals rich fresh basalt.
8.23 27Pink dark brownish mixtured basalt, Silcrete and calcite.
9.27 29Dark brown weathered medium competent basalt comprising calcite.
10.29 31Medium brown yellowish weathered basalt.
11.31 32Dark red brown fresh basalt.
12.32 34Dark brownish yellow fresh amygdaloidale basalt.
13.34 38Dark red brown fresh competent basalt mixed of abundant Silcrete.
14.38 44Dark medium brown fresh competent basalt mixed of abundant Silcrete.
15.44 53Dark grey blueish pyroclastic materials mostly consist of basalt and Silcrete.
16.53 55Dark green olive moderate competent basalt.
17.55 63Dark grey blueish moderate competent pyroclastic materials (basalt and Silcrete contain).
18.63 65Dark brown moderate competent fresh basalt.
19.65 70Dark greenish yellow moderate competent fresh basalt.
20.70 71Medium brownish yellow pyroclastic materials layer.
21.71 80Dark grey greenish pyroclastic materials highly competent, mainly consist of basalt and silstone
22.80 81Dark green greyish fresh basalt.
23.81 96Dark green greyish fresh pyroclastic materials comprising siltstone and basalt plus few quartz.
24.96 102Mixture of dark grey basalt with greenish blue siltstone highly competent and fresh.
25.102 113Dark grey greenish fresh competent basalt.
26.113 114Siltstone mixed of greyish fresh basalt.
27.114 118Dark greyish brown fine grained fresh basalt.
28.118 120Light grey brownish fresh competent Sandstone.
29.120 121Dark red brown fresh competent mudstone.
30.121 122Dark brown fresh competent basalt.
31.122 127Dark grey greenish fresh basalt.
32.127 133Dark grey brown siltstone mixed of fresh basalt.
33.133 137Dark grey blueish fresh competent basalt.
34.137 144Medium brown fresh mudstone.
35.144 145Light grey olive fresh mudstone.
36.145 150Dark brown to olive fresh mudstone.
37.150 153Dark brown fresh competent mudstone.
38.153 156Dark brown fresh competent mudstone.
39.156 170Dark brown greyish mudstone fresh and competent.
40.170 173Dark brown mudstone (fresh competent).

© Botswana Geoscience Institute 2024 | www.bgi.org.bw | Disclaimer