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地质力学学报:2021,27(3):374-390
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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)
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)
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投稿时间:2021-02-01    修订日期:2021-04-22
中文摘要: 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。
Abstract: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.
文章编号:     中图分类号:P627;P314.3    文献标志码:
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)
引用文本:
邓军,战明国,周伟金,等,2021.基于模糊证据权法的广西典型金矿矿产定量预测[J].地质力学学报,27(3):374-390.DOI:10.12090/j.issn.1006-6616.2021.27.03.034
DENG Jun,ZHAN Mingguo,ZHOU Weijin,et al,2021.Quantitative prediction of mineral resources in typical gold deposits in Guangxi, China using a fuzzy weights of evidence method[J].Journal of Geomechanics,27(3):374-390.DOI:10.12090/j.issn.1006-6616.2021.27.03.034

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