投稿时间：2012-05-20
修订日期：2012-12-31
中文摘要:肯德可克铁多金属矿床位于柴达木盆地西南缘、青海祁漫塔格地区的狼牙山-景忍一带,与毗邻的野马泉、尕林格铁多金属矿床具有相似的地质构造背景、成矿地质条件和矿化特征。利用锆石LA-MC-ICP-MS U-Pb定年技术,获得肯德可克铁多金属矿区二长花岗岩的206Pb/238U加权平均年龄为(229.5±0.5) Ma(n=19,MSWD=0.02),厘定其形成时代为晚三叠世;二长花岗岩锆石Hf同位素组成较均一,εHf(t)值为0.8~5.9;金属硫化物的δ34S组成(-2.0‰~+1.5‰)接近于零值,平均为0.43‰,表明为岩浆来源。结合区域最新研究资料,认为肯德可克铁多金属矿床为与印支期岩浆侵入活动有关的矽卡岩型矿床。
Abstract:The Kendekeke iron ore deposit is located in the southwestern margin of Qaidam Basin, lying in Langyashan-Jingren area of Qimantag. It is similar to adjacent Yemaquan and Galinge iron polymetallic deposits in geotectonic background, ore-forming conditions and mineralization characteristics. Zircon LA-MC-ICP-MS U-Pb dating reveals that the age of the monzonite granite from the Kendekeke iron deposit is (229.51±0.48) Ma (n=19, MSWD=0.02), suggesting Late Triassic. εHf(t) varies from 0.8 to 5.9, the δ34S component (-2.0‰~+1.5‰) of the sulfide is close to zero, implying that the source was magma. Combined with filed materials, the Kendekeke iron polymetallic deposit is thought to be a skarn deposit related to the intrusion of Indosinian magma.
keywords:geochemistry skarn-type Fe-polymetallic deposit U-Pb dating of zircon isotopes Kendekeke Qimantag East Kunlun
文章编号：
中图分类号：P618.31
文献标志码：
基金项目:本研究得到中国地质调查局地质调查项目(编号: 1212011085528, 1212011120135, 1212011121089);国家自然科学基金项目(批准号: 41172076)和中国地质调查局青年地质英才计划(201112)的联合资助
引用文本：
肖晔,丰成友,刘建楠,于淼,周建厚,李大新,赵一鸣.2013.青海肯德可克铁多金属矿区年代学及硫同位素特征[J].矿床地质,32(1):177~186XIAO Ye,FENG ChengYou,LIU JianNan,YU Miao,ZHOU JianHou,LI DaXin,ZHAO YiMing.2013.LA-MC-ICP-MS zircon U-Pb dating and sulfur isotope characteristics of Kendekeke Fe-polymetallic deposit, Qinghai Province[J].Mineral Deposits32(1):177~186
图/表
