泰国普龙矽卡岩型铜金矿床闪长岩锆石U-Pb定年及意义  

Zircon U-Pb dating and its geological implications for the diorites from the Phu Lon skarn-type copper-gold deposit in Thailand

作　　者：聂飞[1] 刘书生[1] 杨永飞[1] 彭智敏[1] 郭林楠 NIE fei;LIU Shusheng;YANG Yongfei;PENG Zhimin;GUO Linnan(Chengdu Center,China Geological Survey,Chengdu 610081,Sichuan,China)

机构地区：[1]中国地质调查局成都地质调查中心

出　　处：《沉积与特提斯地质》2019年第4期71-78,共8页Sedimentary Geology and Tethyan Geology

基　　金：中国地质调查局地质调查项目“东南亚大型锡铜金矿资源基地评价”(DD2019444);“老挝、柬埔寨及邻区矿产资源潜力评价”(DD20160107);中国地质调查局成都地质调查中心青年培育基金项目

摘　　要：泰国普龙矽卡岩铜金矿床是琅勃拉邦-黎府铜金多金属成矿带内一个大型矽卡岩铜金矿床。为了厘定普龙矽卡岩型铜金矿床成岩成矿时代、探讨其矿床成因,本文开展了与矽卡岩化密切相关的闪长岩锆石LA-ICP-MS U-Pb年代学研究。研究表明,普龙铜金矿成矿时代为240.6±1.2Ma,与闪长岩结晶年龄一致。结合前人研究成果,认为琅勃拉邦-黎府铜金多金属成矿带在晚二叠世-早三叠世发生了一次重要的斑岩-矽卡岩-热液铜金成矿事件。The Phu Lon skarn-type copper-gold deposit is one of the large-sized skarn-type copper-gold deposits in the northern Luang Prabang-Loei copper-gold polymetallic metallogenic belt in Thailand.The LA-ICP-MS zircon U-Pb isotopic dating give a weighted average age of 240.6±1.2 Ma for the formation of the diorites associated with the skarnization within this copper-gold deposit.This age should represent the mineralization age of the Phu Lon copper-gold deposit,i.e.,the Middle to Late Triassic.The Luang Prabang-Loei copper-gold polymetallic metallogenic belt once recorded an important porphyry-skarn-hydrothermal copper-gold mineralization event during the Late Permian to the Early Triassic.

关 键 词：锆石U-PB定年 闪长岩 成矿时代 普龙矽卡岩型铜金矿床 泰国 

分 类 号：P597.3[天文地球—地球化学]