Picture Not Available
Welcome | Search Borehole BGI | Exploration Borehole

Exploration Borehole


Print PDF
 
 Borehole Number: 105/21/X044/H4
 
 Prospecting Company: De Beers Holdings Botswana
 Prospecting License No.: PL78/88
 Coordinates Type: WGS 84
 Coordinates Format: Decimal Degrees (DD)
 Coordinates: -22.63408 , 21.419433
 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 71Kalahari beds. Sandy Silcrete, cream-green altered kimberlite>50%.
2.71 74> 50% Silcreted epiclastic kimberlite, cream-green altered kimberlite, Karoo siltstone xenoliths 10%, unidentified melanocratic xenoliths: hypabyssal kimberlite? Basalt? Basement?
3.74 75As above. Melanocratic rock looks like HK with segragationary texture.
4.75 7620% HK, Sandy Silcrete, altered kimberlite, Karoo siltstone.
5.76 77Melanocratic xenoliths >22%, altered kimberlite, epiclastic Sandstone.
6.77 78Epiclastic Sandstone and xenoliths.
7.78 79Possibly altered primary kimberlite 50%, epiclastic Sandstone, xenoliths.
8.79 80Predominantly epiclastic Sandstone.
9.80 81Consolidated crater facies, Karoo siltstone and Sandstone xenoliths, melanocratic xenoliths, possibly altered primary kimberlite.
10.81 82Predominantly epiclastic Sandstone, altered primary kimberlite fragments, xenoliths.
11.82 84Epiclastic Sandstone, altered primary kimberlite, Karoo xenoliths, xenolith of mica (phlogopite) rich hypabyssal kimberlite.
12.84 86Epiclastic Sandstone altered primary kimberlite, Karoo xenoliths.
13.86 88Clay rich horizon, epiclastics.
14.88 89Xenolith or wall rock of micaceous Karoo arkose (Mea arkose?).
15.89 90Karoo micaceous arkose.
16.90 91Predominantly Karoo, cream white micaceous Sandstone.
17.91 92Predominantly Karoo, possibility of epiclastic kimberlite (down the hole contamination).
18.92 93Epiclastic kimberlite, Karoo white Sandstone.
19.93 94Micaceous cream, Karoo arkose.
20.94 97Coarser, but still white Karoo Sandstone (less well sorted).
21.97 98White micaceous arkose, kimberlite fragments and basalt xenolith (DTH contamination?).

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