Junior Trivalence Mining (tmi-v) is encouraged by results from drilling carried out on the K-7 kimberlite, which is currently the focus of attention at the Aredor diamond concession in Guinea, West Africa.
Five samples representing kimberlite from nine percussion drill holes were processed. From each, about 15 kg of kimberlite were randomly removed and treated by caustic fusion analysis for microdiamonds; the remaining material, ranging from 0.7 to 1.2 tonnes, was screened to 0.8 mm.
The four largest diamonds recovered weighed 0.06, 0.05, 0.03 and 0.03 carat. Indicator minerals recovered from the larger samples suggest the K-7 kimberlite may be “multi-phased,” according to Trivalence. The indicator minerals are being sent out for microprobe analysis.
Since 1984, the Aredor concession has produced more than 1.2 million carats of diamonds from alluvial deposits worth US$390 million.
The company is now drilling pipe K-19, situated 150 metres northeast of K-7, to determine if the two kimberlites are related.
At last report, Aredor contained diamond reserves measuring 1.3 million carats. Trivalence recently increased its interest in the property to 85% from 59.5% by reaching an out-of-court settlement with its former partners at Aredor. The government of Guinea retains a 15% slice of the pie.
Situated 700 km east of the capital city, Conakry, the property is predominantly underlain by Arechean formations (granite gneiss outcrops with relict belts of amphibolites, quartzites and serpentinites). The region is said to have the highest density of known kimberlite bodies in Guinea.
Diamonds occur in both alluvial terrace deposits and present-day alluvial flat deposits.
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