新疆克尔古提地区矿床矿化期的同位素年龄测定与构造背景  

Isotopic dating and tectonic setting of ore deposits in kerguti area, Xinjiang

作　　者：王苏辉[1] 李凯[1] 万欢[1] WANG Su-hui;LI Kai;WAN Huan(Geological Survey Institute of Jiangxi Province,Nanchang 330030,China)

机构地区：[1]江西省地质调查研究院,江西南昌330030

出　　处：《世界有色金属》2021年第7期233-234,共2页World Nonferrous Metals

摘　　要：在新疆克尔古提地区广泛发育一套形成于志留纪的矿物体,出露于依克克里古提—科克达坂大断裂以北地区,本次工作通过对其进行详细解体,认为其是由中细粒状矿物、中细粒黑云母矿物、中细粒似斑状黑云母矿物组成的一套酸性侵入性的矿物组合。采用LA-ICP-MS技术,对矿床中的地质矿物进行了U-Pb同位素测定,获得矿物结晶年龄分别为421±6 Ma,形成于晚志留世。结合同位素特征以及显微结构特征,认为其是形成于晚志留世时期受大陆边缘弧(科迪勒拉型)和洋闭合后的隆升构造背景的地质矿物。A set of minerals formed in Silurian is widely developed in kerguti area,Xinjiang,and it is exposed in the north of the ekkriguti kekdaban fault.Through detailed disintegration,it is considered to be a set of acid intrusive mineral assemblages composed of medium fine-grained minerals,medium fine-grained biotite minerals and medium fine-grained porphyritic biotite minerals.The U-Pb isotopic determination of geological minerals in the deposit was carried out by La ICP-MS technique.The crystallization age of the minerals was 421±6Ma,which was formed in the late Silurian.The authors consider that the mineral is a geological mineral formed in the late Silurian period by the uplift tectonic background of continental margin arc(codillera type)and ocean closure.

关 键 词：克尔古提 晚志留世 地质矿物的同位素 构造背景 

分 类 号：P618.2[天文地球—矿床学]