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贵州普晴锑金矿区沟系土壤地球化学测量及找矿预测
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摘要
论文在中央财政补助中央(地方)矿产勘查项目《贵州省晴隆县大厂锑(金)矿田西部普晴锑金矿普查》(项目编号:295050028-6)的资助下完成。
     通过区域成矿地质背景、大厂锑矿和老万场红土型金矿两个典型矿床地质及控矿因素、普晴矿床地质特征研究,为在普晴勘查区应用土壤地球化学测量找矿方法提供了理论依据。通过元素富集层位与粒度的研究,确定了进行土壤地球化学测量采样层位为土壤淀积层上部、样品粗加工粒级为-20~+40目粒级段、指示元素以Au、Sb、As、Cu为主,最大限度的确定了此次土壤地球化学测量结果的有效性。
     在查阅前人在红土型金矿研究成果的基础上,结合本区特殊的喀斯特条件,建立了红土型(氧化型)金矿的成矿模式,用以指导本区红土型金矿的找矿。在研究普晴锑金矿区土壤地球化学特征和元素异常特征的基础上,建立了土壤地球化学异常理想模式。
     通过土壤地球化学测量方法的应用,发现了一些有价值的异常,结合地层、岩性等有利控矿因素圈定了4个找矿靶区,确定了各靶区的主要找矿矿种,对各靶区了进行必要的山地工程验证。实践证明,土壤地球化学测量找矿方法在本区是有效的。并在此基础上,较系统的总结了沟系土壤地球化学找矿方法步骤。
This thesis has been fluently finished under the sponsore of the Nation Finance Department for the local items of exploration perambulation: The General Investigation for the Western Puqing Antimony-gold deposit of Dachang Antimony ore-field in the Qinglong Country,Guizhou.
     Studies such as the regional metallogenitc geologic setting, geological characteristics and ore-controlling factors of two typical deposits(Dachang Antimony Deposit and Laowanchang lateritic gold deposit) in Dachang ore-field, the geological characteristics of Puqing deposit,offer the theoretical foundation for the research of using soil geochemistry survey to mine searching in Puqing exploration area. Based on sampling method tests(sampling horizon and size fraction experiments),it is known that the optimal sampling horizon is B2 soil and the best sampling size fraction is -20 to -40 mesh grain size.Au、Sb、As and Cu are indicator elements for prospecting. these studies ensure the validitv of the soil geochemistry survey result.
     The model of lateritic gold deposit is mainly based on previous research in lateritic gold deposit and provisional aridity-"karst aridity" in Puqing exploration area. we can using this model to guide lateritic gold ore-prospecting work in Puqing exploration area. With the studies on geochemical characteristics and element abnormal Characteristics of soils in Puqing exploration area, The model of soil gelchemical abnormal is established.
     With using soil geochemistry survey to mine searching in Puqing exploration area, some valuable abnormal areas have been found. Combined with the ore-controlling factors including strata, Lithologic character,4 key targets for ore-exploration are selected. Every key target has been confirmed by exploration through surface work. It proves that soil geochemistry survey to mine searching in Puqing exploration area. Methods and steps of soil geochemistry survey to mine searching are briefly summarized through . soil geochemistry survey to mine searching in Puqing exploration area.
引文
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