Picture Not Available
Welcome | Search Borehole BGI | Exploration Borehole

Exploration Borehole


Print PDF
 
 Borehole Number: 105/25/K003/1A/NDU
 
 Prospecting Company: De Beers Holdings Botswana
 Prospecting License No.: PL31/88
 Coordinates Type: WGS 84
 Coordinates Format: Decimal Degrees (DD)
 Coordinates: -22.704847 , 27.882753
 Location: Lerala
 
 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 2Brown Topsoil.
2.0 1Topsoil
3.1 8Calcretised QF gneiss.
4.2 8Weakly calcretised quartzo - feldspathic gneiss in a fine Sandy yellowish calcretised matrix large angular gneiss fragments (>2cm) in internal 1-4m.
5.8 9
6.8 11Highly inclusion rich weathered kimberlite.
7.9 11Predominantly pale green amorphous banded silica and qtz + 2% pink kfs.
8.11 1311-12m kimberlite.
9.11 44Inclusion rich diameter facies kimberlite.
10.13 29
11.29 3030m - 30-40% kimberlite.
12.30 33Moderately fresh k below 30m.
13.33 401-5% moderately fresh grey featureless kimberlite in 99-95% inclusions kfs, qtz.
14.40 4441m - apperance in inclusions of green amorphous banded silica.
15.44 45Increase in % kimberlite from 44m.
16.44 111Hypabyssal kimberlite.
17.45 4945m 30% k.
18.49 5280% k, generally featureless coarsely textured grey/dark grey, phlogopite bearing, hypabyssal kimberlite (olivine not seen).
19.52 561% k, inclusions variable
20.56 5980% k.
21.59 62
22.62 6510% k.
23.65 6995% k.
24.69 7430% k.
25.74 98Grey, featureless hypabyssal kimberlite. Variable inclusions 90% - 5% inclusions.
26.98 9995% k.
27.99 110Grey featureless hypabyssal kimberlite.
28.110 11195% k.

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