摘要
文章系统地研究了萨热克铜矿硅化阶段的石英以及碳酸盐化阶段的方解石中的流体包裹体,分析其成矿流体性质及成矿机制。岩相学研究表明流体包裹体类型包括富液相包裹体(W型)、含子晶三相包裹体(S型)、二氧化碳包裹体(C型)以及少量含油气包裹体(O型) 4种类型。石英中包裹体均一温度为112～239℃,盐度为0. 18%～31. 39%NaCleq,方解石中包裹体均一温度为136～219℃,盐度为0. 18%～16. 8%Na Cleq。拉曼测试表明流体包裹体的气相成分以水蒸气为主,并混有CO_2、N_2、CH_4等气体。研究表明萨热克铜矿成矿流体以含铜的氧化性盆地卤水为主,其与盆地深部的还原性油田卤水混合发生化学反应可能是引起大量金属硫化物沉淀的主要机制。
According to the study on the metallogenic fluids of quartz at the silicification stage and calcite at the carbonatation stage in Sareke copper deposit respectively,we analyzed the ore-forming fluids＇ characteristics and the metallogenic mechanism. Study of petrography show that there are four types of fluids inclusions,such as liquid-rich fluid inclusions（ W type）,daughter-mineral bearing multiphase inclusions（ S type）,CO2 bearing inclusions（ C type） and a small quantity of hydrocarbon bearing inclusion（ O type）. The homogenization temperatures and primary salinities of fluid inclusion in quartz are 112 ～ 239℃ and 0.18% ～ 31.39%NaCleq respectively,while that in calcite are 136 ～ 219℃ and 0.18% ～ 16.8%NaCleq respectively. The test results of Raman microspectroscopy indicated that the main component of fluid is H2 O with slightly CO2,N2,and CH4. The ore-forming fluids were mainly derive from the copper-bearing and oxidizing basin brine,and the basin brine mix with reductive oilfield brine may had resulted the ore precipitation.
作者
陈越
赵路通
李世恒
CHEN Yue;ZHAO Lu-tong;LI Shi-heng(Hebei Iron and Steel Group Mining Design Co.,Ltd,Tangshan 063700;Bering Institute of Geology for Mineral Resources,Beijing 100012)
出处
《矿产勘查》
2018年第6期1164-1171,共8页
Mineral Exploration
基金
国家305项目(编号:2015BAB05B04-03)
行业基金项目(编号:201511016-02)联合资助
关键词
砂岩型铜矿
流体包裹体
萨热克
激光拉曼
新疆
sandstone type Cu deposit
fluid inclusion
sareke
laser raman
Xinjiang
