摘要
西藏则不吓铅锌矿床为冈底斯成矿带中部西段新发现的一热液脉型铅锌矿床。为研究该矿床成因及找矿前景,对其成矿地质条件、地球化学异常、高磁异常和激电异常、矿体特征等进行了综合分析。结果认为区内成矿元素以Pb、Zn、Ag等元素为主,是寻找中低温热液型铅锌银多金属矿的有利地区;物化探异常反映其总体构成近环状异常体,指示深部可能存在隐伏岩体,地表出露的断裂构造很可能是岩浆侵入在顶部引爆形成的裂隙,而各类岩脉为深部岩体向上延伸的分支。此外,综合认为该矿床找矿前景很好,后续通过进一步勘查可望取得更大的找矿突破,同时应注意在热液脉型铅锌矿体深部对斑岩型钨钼铜矿或隐爆角砾岩型铅锌银矿的识别和寻找,以拓展区内找矿空间和矿种类型。
Zebuxia Pb-Zn deposit is a newly discovered hydrothermal vein deposit in the western part of the central Gangdean metallogenic belt.In order to study the genesis and prospect of the deposit,a comprehensive analysis of metallogenic geological conditions,geochemical anomalies,high magnetic anomalies,induced polarization anomalies and orebody characteristics is made.It suggests that the ore-forming elements in this deposit are dominated by Pb,Zn and Ag,and it is a favorable area for finding medium-low temperature hydrothermal Pb-Zn polymetallic minerals.geophysical and geochemical anomalies together show a Subannular anomalous body with indicators of concealed rock mass at depth.The exposed fault may be the cracks formed in the top of in the magma intrusion,and all kinds of dikes probably is the branch of upward extended concealed rock mass.In addition,it is thought that Zebuxia Pb-Zn deposit has a good for ore-search prospect and expected to attain a larger breakthrough in further exploration.At the same time,it is noted that much attention should be paid on prospecing the porphyry type W-Mo-Cu orebody or cryptoexplosive breccia type Pb-Zn orebody below the hydrothermal vein orebody,and so that to expand the prospecting space and minerals types in the area.
作者
杜保峰
杨长青
李光耀
何凯
张荣臻
李滢琪
DU Baofeng;YANG Changqing;LI Guangyao;HE Kai;ZHANG Rongzhen;LI Yingqi(Henan Institute of Geological Survey,Zhengzhou,Henan450001;Henan Key Laboratory ofMetal Mineral Mineralization Geological Processes and ResourceUtilization,Zhengzhou,Henan450001;Tianjin Center of Geological Survey,CGS,Tianjin300170)
出处
《地质与勘探》
CAS
CSCD
北大核心
2019年第4期965-974,共10页
Geology and Exploration
基金
中国地质调查局项目(编号:1212010818061、12120114082101)联合资助
关键词
成矿地质条件
物化探异常
找矿前景
则不吓铅锌矿
西藏
metallogenic geological environment
geophysical and geochemical anomaly
prospectingpotential
Zebuxia Pb-Zn deposit
Tibet
