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基于模糊证据权法的广西典型金矿矿产定量预测

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文章导航 > 地质力学学报 > 2021 > 27(3): 374-390

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邓军, 战明国, 周伟金, 伍松乐, 黄宁, 张润秋, 谢淑云. 2021. 基于模糊证据权法的广西典型金矿矿产定量预测. 地质力学学报, 27(3): 374-390. doi: 10.12090/j.issn.1006-6616.2021.27.03.034
引用本文: 邓军, 战明国, 周伟金, 伍松乐, 黄宁, 张润秋, 谢淑云. 2021. 基于模糊证据权法的广西典型金矿矿产定量预测. 地质力学学报, 27(3): 374-390. doi: 10.12090/j.issn.1006-6616.2021.27.03.034
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DENG Jun, ZHAN Mingguo, ZHOU Weijin, WU Songle, HUANG Ning, ZHANG Runqiu, XIE Shuyun. 2021. Quantitative prediction of mineral resources in typical gold deposits in Guangxi, China using a fuzzy weights of evidence method. Journal of Geomechanics, 27(3): 374-390. doi: 10.12090/j.issn.1006-6616.2021.27.03.034
Citation: DENG Jun, ZHAN Mingguo, ZHOU Weijin, WU Songle, HUANG Ning, ZHANG Runqiu, XIE Shuyun. 2021. Quantitative prediction of mineral resources in typical gold deposits in Guangxi, China using a fuzzy weights of evidence method. Journal of Geomechanics, 27(3): 374-390. doi: 10.12090/j.issn.1006-6616.2021.27.03.034
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基于模糊证据权法的广西典型金矿矿产定量预测

  • 1.

    广西壮族自治区地质调查院, 广西 南宁 530023

  • 2.

    广西壮族自治区地质矿产勘查开发局, 广西 南宁 530023

  • 3.

    中国地质大学(武汉)地球科学学院, 湖北 武汉 430074

  • 基金项目: 广西关键矿产资源深部勘查人才小高地项目(桂组通字[2019]85号)；中国地质调查局地质调查项目(DD20190379-19)；广西壮族自治区地质矿产勘查开发局前期工作项目(桂地矿综[2019]06号)
详细信息
    作者简介: 邓军(1973-), 男, 工程硕士, 教授级高工, 从事地质矿产勘查与研究工作。E-mail: dragon.dj@163.com
    通讯作者: 谢淑云(1976-), 女, 博士, 教授, 主要从事勘查地球化学和数学地球科学研究。E-mail: tinaxie@cug.edu.cn

  • 中图分类号: P627;P314.3

Quantitative prediction of mineral resources in typical gold deposits in Guangxi, China using a fuzzy weights of evidence method

  • 1.

    Guangxi Zhuang Antonomous Region Geological Survey Institute, Nanning 530023, Guangxi, China

  • 2.

    Guangxi Bureau of Geology & Mineral Resources, Nanning 530023, Guangxi, China

  • 3.

    Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, Hubei, China

  • Fund Project: This research is financially supported by Talent Highland Project of Key Mineral Resources Deep Exploration in Guangxi (Notification of Organization Department in Guangxi, No.[2019]85, 2019-2023), Provincial Entrusted Project under China Geological Survey (Grant No.DD20190379-19), and Preliminary Work Project of Bureau of Geological and Mineral Exploration and Development in Guangxi Institute of Geological Survey (Comprehensive study of geology and mineral resources in Guangxi, No.[2019]06)
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    摘要

  • 多信息融合的矿产资源定量预测是当前资源潜力预测的前缘课题，不同地质背景信息与地球化学数据的深度挖掘是当前该领域急需解决的关键问题。文章通过总结广西各构造单元地质背景和成矿控制要素，在ArcGIS、GeoDAS等软件平台基础上，分析了广西全区60767个地球化学样品中Au、Ag、Mn、Cu、Pb、Zn、Sn、Sb等主要成矿及伴生元素的空间分布特征。基于GeoDAS平台，通过IDW插值、S-A异常分解、主成分分析等技术，选取地球化学组合元素异常、重磁异常以及岩浆岩与断层交点缓冲区数据，通过模糊证据权模型，重点选取卡林型金矿和破碎带蚀变金矿2种典型矿产类型，编制了成矿后验概率图，圈定了金成矿有利地段。该研究对应用新的成矿理论和评价技术方法在广西开展矿产资源潜力评价以及区划工作具有重要的参考意义。

    Quantitative prediction of mineral resources based on multi-information fusion is the leading topic of resource potential prediction, in which the deep mining of different geological background information and geochemical data is the key problem and still challenging. In this study, we analyzed the spatial distribution characteristics of main metallogenic and associated elements such as Au, Ag, Mn, Cu, Pb, Zn, Sn and Sb in 60767 geochemical samples on the platforms like ArcGIS and GeoDAS, by summerzing the geological background information and metallogenic controlling factors of each tectonic unit in Guangxi. Based on the GeoDAS paltform, through IDW interpolation, S-A anomaly decomposition, principal component analysis and other technologies, the data from the layers with geochemical component element anomaly, gravity and aeromagnetic anomaly and the buffers at the intersection of magmatic rock and fault were used as the training points for the utilization of the fuzzy weights of evidence. A posteriori probability map was drawn up to delineate the favorable metallogenic areas for Carlin-type gold deposit and fracture zone altered gold deposit. This study is of great significance to the application of new metallogenic theories and evaluation techniques in the evaluation or zoning of mineral resources potential.

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  • 图 1  Au元素地球化学空间分布及不同类型金矿点分布图

    Figure 1. 

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    图 2  广西金矿矿产预测主要技术路线图

    Figure 2. 

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    图 3  区域地质要素缓冲区示意图

    Figure 3. 

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    图 4  2个证据图层分布图

    Figure 4. 

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    图 5  主成分的相对重要性示意图

    Figure 5. 

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    图 6  主成分得分图

    Figure 6. 

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    图 7  基于S-A方法的背景与异常区分示意图

    Figure 7. 

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    图 8  基于S-A分解的第一主成分背景场和异常场

    Figure 8. 

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    图 9  基于S-A分解的第三主成分背景场和异常场

    Figure 9. 

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    图 10  布格重力异常图层隶属度函数v-t图解及模糊证据权重的选择示意图(红色点表示与成矿密切相关的点、蓝色点表示与成矿关系不密切的点)

    Figure 10. 

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    图 11  采用模糊证据权法计算的金的后验概率图及资源潜力远景区预测

    Figure 11. 

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    图 12  卡林型金矿后验概率标准化值与三叠系地层空间分布图

    Figure 12. 

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    图 13  卡林型金矿预测靶区与广西有色金属成矿带分布

    Figure 13. 

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    图 14  证据权法破碎带蚀变岩型金矿预测与广西有色金属成矿带分布图

    Figure 14. 

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收稿日期:  2021-02-01
修回日期:  2021-04-22
刊出日期:  2021-06-28

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