| 湘西-黔东地区铅锌矿床找矿模型与定量预测 |
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| 引用本文： | 李堃,刘飞,刘凯,赵少瑞,汤朝阳,段其发.湘西-黔东地区铅锌矿床找矿模型与定量预测[J].吉林大学学报(地球科学版),2020,50(3):825-841. |
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| 作者姓名： | 李堃 刘飞 刘凯 赵少瑞 汤朝阳 段其发 |
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| 作者单位： | 1. 中国地质调查局武汉地质调查中心, 武汉 430205;2. 中国地质大学(武汉)资源学院, 武汉 430074 |
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| 基金项目： | 中国地质调查局地质调查项目（1212011121100，DD20160034） |
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| 摘 要： | 湘西-黔东地区位于扬子陆块东南缘，已发现铅锌矿床（点）200余处，是中国重要铅锌资源战略接续区之一。对该地区铅锌矿床控矿因素与找矿标志的研究结果表明：铅锌矿床受地层、岩相、构造三者的综合控制，即特定的地层岩性组合、台地边缘中缓坡相、区域性断裂和背斜及次生或派生裂隙构造为主要控矿因素；含菱锌矿或褐铁矿的氧化露头，方解石化、黄铁矿化、重晶石化或沥青化等围岩蚀变，Pb、Zn、Cd、CaO、Hg单元素化探异常及Pb-Zn-Cd元素组合化探异常为该地区铅锌矿床的主要找矿标志。综合控矿因素与找矿标志研究结果，构建了研究区铅锌矿床的地质-地球化学找矿模型，并以此模型为基础，在GIS平台上利用特征分析法进行了综合信息矿产定量预测。根据研究区铅锌矿床预测单元联系度等值线图，圈定出A级找矿远景区2个和B级找矿远景区2个，提出松桃、镇远—铜仁、都匀—凯里地区应作为后续铅锌找矿勘查工作重点区。
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| 关 键 词： | 控矿因素 找矿标志 找矿模型 定量预测 铅锌矿床 湘西-黔东 |
| 收稿时间： | 2018-08-20 |
Prospecting Model and Quantitative Prediction of Pb-Zn Deposits in Western Hunan and Eastern Guizhou |
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| Li Kun,Liu Fei,Liu Kai,Zhao Shaorui,Tang Zhaoyang,Duan Qifa.Prospecting Model and Quantitative Prediction of Pb-Zn Deposits in Western Hunan and Eastern Guizhou[J].Journal of Jilin Unviersity:Earth Science Edition,2020,50(3):825-841. |
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| Authors: | Li Kun Liu Fei Liu Kai Zhao Shaorui Tang Zhaoyang Duan Qifa |
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| Institution: | 1. Wuhan Center, China Geological Survey, Wuhan 430205, China;2. Faculty of Earth Resources, China University of Geosciences(Wuhan), Wuhan 430074, China |
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| Abstract: | The western Hunan and eastern Guizhou are located in the southeast margin of the Yangtze craton,where more than 200 Pb-Zn deposits/occurrences are developed. It is one of the important successive strategic bases of Pb-Zn resources in China. In this district, a systematic study is conducted on ore controlling factors and prospecting indicators of Pb-Zn deposits. The Pb-Zn deposits are jointly controlled by stratum, lithofacies, and structures, specifically the lithology assemblages, middle shallow ramp facies, regional faults, anticline, secondary faults,and fractures. The important prospecting indicators of Pb-Zn deposits in this district mainly include oxidation outcrop containing limonite or smithsonite, hydrothermal alterations of calcilization, pyritization, baratization,and bituminization, Pb, Zn, Cd, CaO, Hg geochemical anomalies, and Pb-Zn-Cd combination geochemical anomaly. On the basis of the comprehensive analyses of controlling factors and prospecting indicators, the authors build a geological-geochemical regional prospecting model, which is helpful to conduct comprehensive quantitative prediction by using characteristic analysis method on the GIS platform. According to the prospecting probability contour map of Pb-Zn deposits, two first-class ore prospective areas and two second-class ore prospective areas are delineated. The authors suggest that Songtao, Zhenyuan-Tongren and Duyun-Kaili are the most potential areas for further exploration. |
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| Keywords: | controlling factors prospecting indicators prospecting model quantitative prediction Pb-Zn deposits western Hunan and eastern Guizhou |
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