西准噶尔谢米斯台铜矿的发现及意义  

DISCOVERY OF THE XIEMISITAI COPPER DEPOSIT IN WESTERN JUNGGAR,XINJIANG AND ITS GEOLOGICAL SIGNIFICANCE

作　　者：申萍[1] 沈远超[1] 刘铁兵[1] 潘鸿迪[2] 孟磊[1] 宋国学[1] 代华五[1] 

机构地区：[1]中国科学院地质与地球物理研究所,中国科学院矿产资源研究重点实验室,北京100029 [2]长安大学地质科学与资源学院,陕西西安710054

出　　处：《新疆地质》2010年第4期413-418,共6页Xinjiang Geology

基　　金：中国科学院知识创新工程(KZCX2-YW-107);国家305项目(2006BAB07B01)联合资助

摘　　要：近年来,新疆西准噶尔金、铜矿床找矿勘查取得了重大突破,谢米斯台区野外地质工作过程中,发现S24铜矿点.通过地质填图、地球化学扫面和深部地球物理测量,发现S24铜矿点存在火山机构,矿化受火山机构和区域断裂联合控制.地表圈出3个矿化体,发现地球物理异常达地下400 m,火山机构深部可能存在斑岩型矿化.经钻孔验证(孔深350 m),发现地下3层矿化体,估算铜资源量5×104 t.认为S24铜矿点具小型铜矿床规模,将其命名为谢米斯台铜矿.含矿火山岩锆石U-Pb年龄为(422.5±1.9)Ma.谢米斯台铜矿是西准噶尔地区形成于早古生代火山岩型铜矿.Recently,series of breakthroughs for gold and copper exploration have been made in the Western Junggar,Xinjiang.However,the new copper deposit in the Xiemisitai Mountain has not been reported so far.We study the geology and mineralization in the Xiemisitai Mountain and discovered S24 copper ore spot.Our detailed mapping indicates that the mineralization in the ore spot is controlled by a caldera fracture systems superimposed by the EW-striking regional faults.The geochemical investigation discovered the three mineralization bodies and the geophysical investigation detected the resistivity anomalies with a vertical extension to 400 m in the depth.Porphyry copper mineralization may occur in the depth of the caldera.One test hole（350 m depth） demonstrates the presence of copper mineralization bodies.About 5 × 104 tonnes copper is contained in Xiemisitai volcanic rocks.Based on these,we considere the S24 copper ore spot as a small copper deposit and name it as the Xiemisitai copper deposit.Ore-bearing volcanic activity occurred at（422.5±1.9） Ma based on U-Pb analyses of zircons from the rhyolite.The Xiemisitai copper deposit is a volcanic copper deposit formed in the Early Paleozoic in the Western Junggar.The newly-discovery Xiemisitai copper deposit has a great significance for regional research and prospecting.

关 键 词：西准噶尔 谢米斯台铜矿床 火山机构 地球物理异常 

分 类 号：P618.41[天文地球—矿床学]