摘要
库尔尕生铅锌矿床位于新疆西天山赛里木地区,矿体赋存于上泥盆统托斯库尔他乌组上亚组,矿体受断裂构造控制,呈脉状充填于围岩裂隙中。成矿阶段依次为无矿石英阶段(Ⅰ);石英-多金属硫化物阶段(Ⅱ);方解石阶段(Ⅲ)。流体包裹体显微测温显示,成矿流体为中低温(97℃~205℃)、低盐度(0.4%~3.1%)、低密度(0.9~1.0 g·cm^(-3))的H_(2)O-NaCl体系。从Ⅰ阶段到Ⅲ阶段,成矿流体大体呈均一温度和盐度降低趋势。主成矿阶段(Ⅱ)中闪锌矿、黄铁矿和黄铜矿的原位δ^(34)S值为4.1‰~14.2‰,表明矿床硫来源于中酸性岩浆与地层硫的混合硫。库尔尕生铅锌矿床为与邻近达巴特铜钼矿床伴生的、矿化相对较浅的远源中低温热液脉型矿床,与达巴特铜钼矿床构成一套与中酸性岩浆有关的斑岩型铜钼-热液脉型铅锌成矿系统。
The Kuergasheng Pb-Zn deposit is located in the Sailimu area,Western Tianshan,Xinjiang.The ore body occurred in the upper Devonian Tuosikuertawu formation.The ore body was controlled by the fault structure and filled in the wall rock fissure as quartz-sulfides veins.The metallogenic stages were divided into quartz stage(I),quartz-polymetallic sulfides stage(II)and calcite stage(III).Fluid inclusion study indicates that the ore-forming fluid was a H_(2)O-NaCl system with medium to low homogenization temperature(97℃~205℃),low salinity(0.4%~3.1%)and low density(0.9~1.0 g·cm^(-3)).From stage I to stage III,the ore-forming fluid shows decreasing trends of homogenization temperature and salinity.Theδ^(34)S value of the sulfides ranged from 4.1 to 14.2‰,indicating that the source of sulfur was the mixed sulfur of intermediate to felsic magma and strata sulfur.The Kuergasheng Pb-Zn deposit is a distal medium to low temperature hydrothermal vein deposit associated with the adjacent Dabate Cu-Mo deposit and relatively shallow mineralization,which together with the Dabate Cu-Mo deposit constituted a set of porphyry Cu-Mo-hydrothermal vein-style Pb-Zn metallogenic systems related to intermediate to felsic magma.
作者
柳晨雨
章永梅
顾雪祥
王佳琳
彭义伟
郑少华
徐劲驰
Liu Chenyu;Zhang Yongmei;Gu Xuexiang;Wang Jialin;Peng Yiwei;Zheng Shaohua;Xu Jinchi(School of Earth Sciences and Resources,China University of Geosciences,Beijing,100083,China;State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Beijing,100083,China;College of Earth Science and MLR Key Laboratory of Tectonic Controls on Mineralization and Hydrocarbon Accumulation,Chengdu University of Technology,Chengdu,Sichuan,610059,China)
出处
《新疆地质》
CAS
CSCD
2021年第4期655-660,共6页
Xinjiang Geology
基金
国家重点研发计划深地资源勘查开采重点专项(2018YFC0604003)资助。
