摘要
在杜万克艾得尔幅(44E012020)中的中新统吉迪克组(N1j)地层中的含铜砂砾岩采取了两个碎屑锆石样,44粒碎屑锆石(绝大数为岩浆锆石,仅一粒变质锆石)测年数据统计表明,出现1591~1099 Ma、819~847 Ma、438 Ma、285 Ma四个年代分布峰值,经与库车盆地北部的西南天山造山带中的变质岩、火山岩、侵入岩的活动高峰期的对比说明,来自锆石测年的证据充分表明两者对应极好,该成果是库车盆地的物源来自其北部的西南天山造山带的证据之一,结合本次工作对中新统吉迪克组(N1j)地层中的砂砾岩型铜矿化的同沉积成因的成矿特征认识,指出本区砂砾岩型铜矿的物质来源是其西南天山造山带中已有的铜矿,其铜矿风化剥蚀并随砂砾岩屑物一起汇入库车盆地,进而参与形成与地层呈顺层展布的砂砾岩型铜矿(化)。
Two samples were achieved from copper-bearing conglomerate of Miocene Jidike Group in Duwankeaidee Sheet(44E012020),and there are four peak age of 1591-1099 Ma,819-847 Ma,438 Ma and 285 Ma from 44 detrital zircons,most of which were magmatic zircon except for one metamorphic zircon.It is well homologous with peak age of magmatite,volcanics,metamorphite in the Southwestern Tianshan Orogen in comparison with ages of 44 detrital zircons in this work,which is one of evidences that provenances of Kuche basin is from the Southwestern Tianshan Orogen.In this work,it is pointed that copper mineralization in copperbearing conglomerate is consided as synsedimentary,and copper of copper-bearing Conglomerate in Kuche basin was from copper mine in the Southwestern Tianshan Orogen.Copper mine was weathered and carried to Kuche basin accompanied by sand gravel,and ultimately contributed to the forming of copper mine in copper-bearing conglomerate with feature of synsedimentary.
作者
范世家
刘增仁
蒋加燥
蔡厚安
靳淑韵
FAN Shijia;LIU Zengren;JIANG Jiazao;CAI Hou’an;JIN Shuyun(China Non-ferrous Metals Resource Geological Survey,Beijing 100012,China)
出处
《矿产勘查》
2021年第7期1565-1575,共11页
Mineral Exploration
基金
中国地质调查局项目《西南天山成矿带霍什布拉克-乌拉根地质矿产调查》(DD20160001)资助
关键词
含铜砂砾岩
铜矿
碎屑锆石
杜万克艾得尔地区
物源时代
库车盆地
copper-bearing conglomerate
copper deposit
detrital zircon
Duwankeaideer region
age of provenance
Kuche basin
