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
张龙 1王炳军 2叶雷 2黄加忠 1白平雁2
作者信息
- 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;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
- 2. 中国地质调查局昆明自然资源综合调查中心,云南 昆明 650000
- 折叠
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.
Abstract
The karst mountainous area in northern Guizhou is characterized by its complex geological struc-tures and uneven karst development,which poses certain challenges for mineral exploration work in the re-gion.Through the conduct of a 1∶50,000 stream sediment geochemical survey,the geochemical characteris-tics of 11 elements related to the dominant mineral species within the area were analyzed,and element com-bination 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 mineraliza-tion 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 poten-tial for mineralization.The spatial coincidence of the stream comprehensive anomalies with the soil compre-hensive 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Key words
stream sediment measurement/soil geochemical survey/karst stonemountain area/northern Guizhou引用本文复制引用
出版年
2024
NETL
NSTL
万方数据