Ashanti

ASHANTI (EN: Ashanti, RU: Ашанти) is the deposit of gold within Ghana. It was being developed during the ancient times, the developments have been started again during the 1905. It is situated within the limits of the Lower Proterozoic Birim folded belt of the West African gold-bearing province. The deposit is of the hydrothermal origin. The ore bodies are the quartzous veins, which are enclosed within the dark gray phyllites with thin seams of greywacke.

The largest vein (Obuasi) has been traced along the strike for 370 metres, with the thickness of 3.7 metres, with the angles of the dip of 65-70 degrees. Of the ore minerals, besides the gold, there exist pyrite, arsenopyrite, sphalerite, galena. The quantity of the gold, which has been extracted since the start of the repeated development of the deposit, is estimated at 450 tonnes. During the 1950-ies, the content of the gold was 25-30 grams per tonne, up to 50 grams per tonne within the certain places; during the 1980, its content has decreased to 9.3 grams per tonne. The depth of the underground mine is approximately 2 thousand metres, the annual extraction of the gold is 7-8 tonnes. The development of the deposit is conducted by the "Ashanti Goldfields" governmental company. Within the region of the deposit, there are being developed also the gold-bearing placer deposits.