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黔北岩溶石山区地球化学特征及找矿效果

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

stream sediment measurementsoil geochemical surveykarst stonemountain areanorthern Guizhou

张龙、王炳军、叶雷、黄加忠、白平雁

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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

水系沉积物测量 土壤地球化学测量 岩溶石山区 黔北

2024

矿产与地质
桂林矿产地质研究院

矿产与地质

CSTPCD
影响因子:0.42
ISSN:1001-5663
年,卷(期):2024.38(6)