| 老挝全国地球化学填图与成矿远景区预测 |
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| 引用本文：王玮,王学求,张必敏,韩志轩,Sounthone LAOLO,Phomsylalai SOUKSAN,刘汉粮,刘东盛.2020.老挝全国地球化学填图与成矿远景区预测[J].地球学报,41(1):80-90. |
| DOI：10.3975/cagsb.2019.052802 |
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| 基金项目:国家重点研发计划项目(编号: 2016YFC0600600);中国地质调查局地质调查项目(编号: 121201108000150005; 1212011120331; 1212010661313) |
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| 中文摘要:随着国家“一带一路”倡议的推进, 在中国地质调查局的资助下, 开展了老挝境内21万km2的国家尺度(1:100万)地球化学填图工作, 本次工作填补了老挝国家尺度地球化学填图的空白, 为老挝基础地质、矿产开发、环境保护、农业生产等多个方面提供了基础地球化学保障。本次共采集老挝境内地球化学样品1905件, 使用多种测试手段分析了71种元素的含量, 并据此制作了这些元素的地球化学图和地球化学异常图。通过对老挝Au、Cu、Ni、Co、Mn、Zn、Ag、As、Sb、Pb、Bi和Sn的地球化学参数及其相关性的研究发现: 这些元素的中位值均小于我国热带雨林区水系沉积物元素含量, 而且这些元素的中位值均小于其平均值, As、Au、Bi、Pb和Sb在老挝境内的分布十分不均, 元素局部富集明显。通过R型聚类分析, 我们将上述元素分为Au; Cu; Ni、Co; Mn、Zn; Ag、As、Sb、Pb、Bi、Sn等5个簇群, 并根据元素的地球化学分布特征及综合异常特征, 在老挝划分了7个地球化学成矿远景区。 |
| 中文关键词:老挝 地球化学填图 国家尺度 成矿远景区预测 |
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| National-scale Geochemical Mapping and Prediction of Metallogenic Prospective Areas in Laos |
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| Abstract:With the promotion of the National Initiative “The Belt and Road” and the support of the China Geological Survey, a national-scale geochemical mapping of 210 000 km2 was carried out in Laos, which filled the blank of national-scale geochemical mapping in Laos, and provided the basic geochemical guarantee for Laos’ basic geology, mineral development, environmental protection, and agricultural production and some other fields. During the project, a total of 1905 geochemical samples were collected in Laos, 71 elements were analyzed through several testing methods. Based on the analysis results, the geochemical maps and geochemical anomaly maps of Laos were compiled. By studying the geochemical parameters of Au, Cu, Ni, Co, Mn, Zn, Ag, As, Sb, Pb, Bi and Sn in Laos and their correlations, it is found that the median values of these elements are less than the values of sediments in the tropical rainforest area of China, and the median values of these elements are less than their average values. As, Au, Bi, Pb and Sb are unevenly distributed in Laos, and the local enrichment of elements is obvious. Through the analysis of R-type cluster, the elements are divided into five clusters: Au; Cu; Ni, Co; Mn, Zn; and Ag, As, Sb, Pb, Bi, Sn. According to the geochemical distribution characteristics and comprehensive anomaly characteristics of the elements, Laos is divided into seven metallogenic prospective areas. |
| keywords:Laos geochemical mapping national-scale metallogenic prospective area |
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