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 Borehole Number: 105/25/K003/1A/H12

 
 Prospecting Company: De Beers Holdings Botswana
 Prospecting License No.: PL31/88
 Coordinates Type: WGS 84
 Coordinates Format: Decimal Degrees (DD)
 Coordinates: -22.704074 , 27.883131
 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
2.11 13Some green clay + phlogopites - kimbelite breccia?
3.13 20Polymict breccia - felsic gneiss, quartzite, Schist.
4.20 26Decomposed light grey clay abundant - non - kimberlitic.
5.26 31The remainder of the hole (except 94-95m) consists of entirely fariable, quartz, biotite Schist are pink feldspar gneiss in varying proportions. The Schist is generally most abundant.
6.31 39(pfg - pink feldspar gneiss qz - biot = quartz biotite Schist.)
7.39 4790% qz - biot - Schist, 10% pf gneiss.
8.47 49Small percentage laminated clay - decomposed Schist.
9.49 59100% pfg
10.59 6260% Schist + 40% pfg.
11.62 6980% pfg, 20% Schist.
12.69 79>90% qz biot - sch.
13.79 81Schist is sulphide bearing.
14.81 93100% Schist.
15.93 9990% Schist but approximately 10% of featureless, light brown, non - foliated, phlog bearing kimberlite. Definitely not Schistose sample submitted for petrography under consignment no mak/92/043.
16.99 110From 95m - EOH at 110m is dominantly qz - fsp biot - Schist with the occosional pfg inclusions.

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