Upper Kayrakty Deposit

UPPER KAYRAKTY DEPOSIT of the tungsten ores (RU: Верхнекайрактинское месторождение вольфрамовых руд) is situated within the Dzhezkazgan province of the Kazakh SSR. This deposit has been discovered during the 1945, has been explored during the 1950-59, and has been completely explored during the 1980-82. This deposit is confined to the Uspenskaya tectonic zone within the place with the knee-shaped bending of the northern wing of the fold of the Silurian schists and sandstones, which have been breached by the intrusion, which is hidden at the depth, of the granites of the Upper Paleozoic age. Within the contours of the super-intrusive scheelite-bearing stockwork, which is having the elongation in the latitudinal direction in terms of the projection onto the horizontal plane, and the steep dip to the south, there are distinguished the places, which are enriched with scheelite, which have been traced to the depth of 1200 metres. The ore venules, which are forming the stockwork, and which are mostly steeply dipping, with the thickness from the first millimetres to 1-1.5 centimetres, have the prevalently submeridional orientation. During the first stage, there have emerged the quartz venules without the ore, and during the second stage, there have emerged the quartz and quartz-feldspar venules with scheelite, molybdenite, wolframite, fluorite, pyrite, galena, sphalerite, chalcopyrite, and muscovite. The ratio between the wolframite and scheelite is from 1:5 to 1:7. The interspersed mineralization has the subordinate significance.