黔北岩溶石山区地球化学特征及找矿效果  

Geochemical characteristics and prospecting effects in the karst stone mountainous area in northern Guizhou

作　　者：张龙 王炳军 叶雷 黄加忠 白平雁 ZHANG Long;WANG Bingjun;YE Lei;HUANG Jiazhong;BAI Pingyan(Kunming General Survey of Natural Resources Center,Geological Survey,Kunming 650000,Yunnan,China;Technology Innovation Center for Natural Ecosystem Carbon Sink,Ministry of Natural Resources,Kunming 650000,Yunnan,China)

机构地区：[1]中国地质调查局昆明自然资源综合调查中心,云南昆明650000 [2]自然资源部自然生态系统碳汇工程技术创新中心,云南昆明650000

出　　处：《矿产与地质》2024年第6期1057-1067,共11页Mineral Resources and Geology

基　　金：中国地质调查局自然资源监测(昆明中心)项目(编号:DD20230467);乌蒙山岩溶石山区昭通—毕节地区区域地质调查项目(编号:DD20191012)共同资助。

摘　　要：黔北岩溶石山区由于其复杂的的地质构造和不均匀的岩溶发育,使该区的找矿工作有一定的难度。通过开展1:5万水系沉积物地球化学测量工作,对区内与优势矿种相关的11种元素地球化学特征进行分析,圈定元素组合异常,并在此基础上综合1:1万土壤地球化学测量的异常查证结果,圈定综合异常。结果表明:区内Cd、Pb、Zn元素含量分异程度强、高强数据多,成矿潜力较大,可能是受某种地质作用导致局部地段富集;Ag元素含量分异程度中等,有一定成矿可能性;Hg、Mo、As、Cr、V、Sb、Bi元素含量分异程度中等最弱,属不均匀型,成矿可能性较小。水系综合异常与土壤综合异常空间套合较好,指示的赋矿层位基本相同;该区属于中—低温热液型铅锌矿床,受地层和构造的双重控制,赋矿层位为寒武(奥陶)系娄山关组一段。The karst mountainous area in northern Guizhou is characterized by its complex geological structures and uneven karst development,which poses certain challenges for mineral exploration work in the region.Through the conduct of a 1:50,000 stream sediment geochemical survey,the geochemical characteristics of 11 elements related to the dominant mineral species within the area were analyzed,and element combination anomalies were delineated.Based on this,combined with the results of a 1:10,000 soil geochemical survey for anomaly verification,comprehensive anomalies were identified.The results indicate that:there is a strong differentiation and high data density for Cd,Pb and Zn elements,suggesting significant mineralization potential,likely due to some geological action leading to local enrichment;the differentiation degree of Ag element content is moderate,indicating a certain potential for mineralization;the differentiation degree of Hg,Mo,As,Cr,V,Sb,and Bi elements is the weakest,and they are of the uneven type,with less potential for mineralization.The spatial coincidence of the stream comprehensive anomalies with the soil comprehensive anomalies is good,indicating the same mineralization stratigraphic position;the area belongs to a mesothermal to low-temperature hydrothermal lead-zinc deposit,controlled by both stratigraphic layers and structures,with the mineralization stratigraphic position being the lower member of the Lower Ordovician(Upper Ordovician) Loushan Guan Formation.

关 键 词：水系沉积物测量 土壤地球化学测量 岩溶石山区 黔北 

分 类 号：P632[天文地球—地质矿产勘探]