恰特卡洛—库拉明铀成矿区概况

Overview of Qatecalovo-Kulaming uranium metallogenic region

恰特卡洛—库拉明铀成矿区是世界上最早探明的火山岩型铀成矿区。该成矿区位于中天山华力西期造山带库拉明隆起内。矿区内共探明大、小铀矿床10个,共采出金属铀20 000 t以上。铀矿床主要产于晚古生代火山洼地内,其火山岩的特点是成分反差大,由安山岩到流纹岩,铀矿化年龄为260～270 Ma。该成矿区所处的大地构造向东可延伸到中国境内。研究其成矿条件,对指导在中国西北部造山带古生代火山岩内找矿具有一定的借鉴作用。

Qatecalovo-Kulaming uranium metallogenic region is the earliest discovered volcanic-type uranium metallogenic region in the world,which is located in the Kulaming uplift of Middle Tianshan Variscan orogenic belt.Ten deposits have been discovered in the mine area,over 20 000 t metallic uranium has been mined out.Uranium deposits mainly occurred in Late Palaeozoic volcanic depression,and the volcanic rocks are characterized by the great lithologic change from andesite to rhyollite.Mineralization age is from 260 to 270 Ma.The tectonic unit in which the metallogenic region is located can extend eastward into China.Therefore,the ore-forming condition study on this tectonic unit can be used to guide the prospection for Palaeozoic volcanics uranium deposit in northwestern China.