Cooke Report 29 October 1998

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Phase II (March 1997)

Four boreholes were drilled to investigate the geomagnetic anomalies detected by Dr G.J. Greeff. A total or 192 metres was drilled on four boreholes. Results were as follows:

Borehole No.	Depth in Metres	Description

1	0 - 9.0	Soil and clay
	9.0 - 40.0	Shale
	40.0 - 55.0	Ventersdorp lava

2	0 - 10.0	Soil and clay
	10.0 - 40.0	Shale (water)
	40.0 +	Ventersdorp

3	0 - 5.0	Soil and calcrete
	5.0 - 20.0	Yellow clay
	20.0 - 37.0	Blue clay
	37.0 - 55.0	Powdery yellow clay

4	0 - 6.0	Soil
	6.0 - 8.0	Calcrete
	8.0 - 13.0	Gravel and calcrete
	13.0 - 16.0	Clay
	16.0 - 25.0	Clay and gravel
	25.0 - 30	Sand and gravel (water)
	30.0 - 42	Clay, sand and gravel (water)

Boreholes 1 and 2, sited to examine the magnetic anomaly, failed to intersect kimberlite. It is most unlikely that vertical percussion drilling will intersect a vertically orientated and relatively narrow ( +- 1m) kimberlite fissure. This anomaly should be investigated by means of inclined diamond drilling.

Boreholes 3 and 4 were located in the area characterised by low magnetic values. Both boreholes confirmed the presence or gravel in a Deep Structure but failed to reach bedrock

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