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Exploration Borehole


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 Borehole Number: 105/25/K003/1A/H6

 
 Prospecting Company: De Beers Holdings Botswana
 Prospecting License No.: PL31/88
 Coordinates Type: WGS 84
 Coordinates Format: Decimal Degrees (DD)
 Coordinates: -22.704792 , 27.883909
 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
2.4 5Pink gneiss (alk fsp rich) green clay.
3.5 680% gneiss, 20% green clay.
4.15 19Macrocrystic kimberlite olivines seen but chips are still fairly decomposed, gneiss xenoliths.
5.19 2150% kimberlite, 50% gneiss.
6.21 26Vein quartzite xenolith, pink fsp gneiss + green kimb phlogopites visible.
7.26 30Kimberlite becoming harder + fresher.
8.30 3760% kimberlite with phlogopite, 40% gneiss.
9.37 38Blue kimberlite, fresh + hard (80% ).
10.38 39Recrystallised vein material, pale green chalkedony.
11.39 42Recrystallised vein material 80%, kimberlite 20%.
12.42 48Blue kimberlite with visible euhadral 70% basement.
13.48 5080% macrocrystic kimberlite, 20% pink fsp gneiss.
14.50 5240% inclusions, 60% blue kimberlite - can see calcite xtals?
15.52 5690% kimberlite (inclusions include Amphiboliteibolite, quartzite and pink feldspar basement. Kimberlite is generally aphanitic but with some visible phlogopites.
16.56 6080% kimberlite (inclusions include Amphiboliteibolite, quartzite and pink feldspar basement. Kimberlite is generally aphanitic but with some visible phlogopites.
17.60 6970% kimberlite inclusions include Amphiboliteibolite, quartzite and pink feldspar basement. Kimberlite is generally aphanitic but with some visible phlogopites.
18.69 7080% kimberlite (inclusions include Amphiboliteibolite, quartzite and pink feldspar basement. Kimberlite is generally aphanitic but with some visible phlogopites.
19.70 7190% recrystallized quartz vein material + pink gneiss.
20.71 7770% recrystallized quartz vein material + 30% kimberlite.
21.77 8920% quartz vein material, 80% kimberlite.
22.89 9095% blue kimberlite.
23.90 9260% kimberlite, 40% quartz vein material.
24.92 9510% kimberlite, 90% quartz vein material.
25.95 97100% basement - vein quartz, quartzitic gneiss.
26.97 9940% kimberlite, 60% pink fsp gneiss + felsite.
27.99 10070% kimberlite (varying degrees of inclusions of vein quartz and gneiss). Kimberlite is blue and fresh with phlogopites.
28.100 10220% kimberlite (varying degrees of inclusions of vein quartz and gneiss). Kimberlite is blue and fresh with phlogopites.
29.102 10370% kimberlite (varying degrees g inclusions g vein quartz and gneiss). Kimberlite is blue and fresh with phlogopites.

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