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Exploration Borehole


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 Borehole Number: 105/25/K003/1A/NDC
 
 Prospecting Company: De Beers Holdings Botswana
 Prospecting License No.: PL31/88
 Coordinates Type: WGS 84
 Coordinates Format: Decimal Degrees (DD)
 Coordinates: -22.705195 , 27.882771
 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 1Topsoil
2.0 6Calcretes + Silcretes.
3.1 2Mixture of basement fragments & Silcretes & calcretes.
4.2 13Pink felsic basement intercalated with fine grained grey crystalline siliceous material.
5.6 10Basement
6.10 50Pink felsic basement.
7.13 39Small piece of identifiable kimberlite - blue featureless, no texture or metamorphine texture present.
8.39 45Pink felsic basement intercalated with fine grained grey crystalline siliceous material.
9.45 55Rapid change to soft blue kimberlite chews to blue clay. No texture or metamorphic texture present. Felsic basement fragments rare.
10.50 56Pink felsic basement, 1 piece of kimberlite at 40m.
11.55 65Hypabyssal kimberlite.
12.56 70Basement
13.65 98Kimberlite progressively becomes darker with introduction of black Amphiboliteibolite fragments.
14.70 90Kimberlite
15.90 106Kimberlite with Amphiboliteibolite fragments.
16.98 107Kimberlite dark, associated with Amphiboliteibolite fragments.
17.106 110Wallrock basement.
18.107 110Wallrock - basement consisting of felsic basement.

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