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Exploration Borehole


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 Borehole Number: 105/17/X453/H01

 
 Prospecting Company: De Beers Holdings Botswana
 Prospecting License No.: PL57/98
 Coordinates Type: WGS 84
 Coordinates Format: Decimal Degrees (DD)
 Coordinates: -21.4631 , 24.457121
 Location: Orapa

 
 Start Drill: 2004-08-12
 End Drill: 2004-08-13
 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: 941 Metres
 Borehole Water Strike: N/A
 End of Hole (Depth): 170 Metres
 Hole Diameter: 165 Millimetres

 
 Log Formation:
No.From (m)To (m) Log Formation
1.0 3Dark grey to medium fine Sand.
2.3 11Orange fine - medium Sand slightly cemented to cream with cream calcrete increased downward.
3.11 13Grey orange calcareous Sand.
4.13 26Grey orange calcareous Sand.
5.26 30Grey fine grained silcretised Sandstone (Massive).
6.30 49Grey Sandstone becoming creamy (calcrete).
7.49 60Orange medium grained Sandstone becoming red brown (dark red to fine) up to 76m.
8.60 69Red brown fine Sandstone.
9.69 74Dark red (as above) silcatly magnetic. Ferrugenised fine grained Sandstone.
10.74 76None rounded quartz clasts up to 10mm in size.
11.76 82Dark brown (red dark) very fine grained Sandstone with some pale grey silstone.
12.82 84Dark brown (Flaky) siltstone.
13.84 88Red brown silstone.
14.88 93Slight colour change (towars grey) brown siltstone.
15.93 108Siltstone: brown and grey greenish.
16.108 117Dark grey (green) very fine grained slightly to moderately magnetic (mafic) rock with grey green fine grained Sandstone (siltstone). Green mafic rock details: Texture (very fine), coulor (green-dark green), identificable minerals (dark green with PX?), mi
17.117 120Brown (dirty) silstone.
18.120 126Grey bown siltstone.
19.126 150Grey siltstone very hard, very fine grained Sandstone (no visible texture)
20.150 155Very fine grained grey siltstone (Flacky).
21.155 156Dark grey igneous texture and siltstone.
22.156 170Dark grey mafic and magnetic rock. Texture (very fine grained); coulor (dark grey and some whitish Sandstone); matrix (dark grey); Minerals (probably Pyroxeniteene green); rock type (probably) dolerite. Black minerals 1mm in size, grey whitish feldpar.

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