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| 基金项目：核工业北京地质研究院GF科技重点实验室基金项目“基于地质大数据分析的矿产预测关键技术研究”（73952020005） |
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| 摘要： |
| 以祁连山北缘西段为研究区，以沉积变质型铁矿为预测矿种，通过铁矿成矿地质规律研究，总结找矿模型，确定找矿标志。基于GIS信息处理技术及其空间分析功能，运用ArcMap、MapGIS平台提取并分析研究区的多源成矿有利地质信息。认为区内沉积变质型铁矿的成矿有利地层为长城系桦树沟组，断裂是主要控矿构造，8 km是断裂的最佳控矿范围，岩体不是研究区内沉积变质型铁矿的主要控矿因素；Zn、Mn、Ba异常可以作为研究区内沉积变质型铁矿的重要找矿标志。运用证据权法，将研究区划分为810个网格单元，提取17个证据因子进行成矿预测，共圈定了14个A级、3个B级成矿远景区，为研究区的找矿工作提供理论和实践参考。 |
| 关键词：沉积变质型铁矿 多源地质信息提取与分析 证据权重法 二维成矿预测 北祁连西段 |
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| Abstract: |
| Taking the western part of the north margin of the Qilian Mountains as the research area, and sedimentary metamorphic iron deposit as the predicted ore species, based on the study of the geological regularity of iron mineralization, the prospecting model is summarized and the prospecting mark is determined. Based on GIS information processing technology and its spatial analysis function, the favorable geological information of multi-source mineralization in the study area was extracted and analyzed on ArcMap and MapGIS platforms. It is considered that the favorable ore-forming strata of the sedimentary metamorphic iron deposit in the study area is the Huashugou Formation of the Changchengian System, the fault is the main ore-controlling structure, 8 km is the best ore-controlling range of the fault, and rock mass is not the main ore-controlling factor of the sedimentary metamorphic iron ore in the study area. Zn, Mn and Ba anomalies can be used as important prospecting indicators for sedimentary metamorphic iron deposit in the study area. With the weight of evidence method, the study area is divided into 810 grid units. Seventeen evidence factors are extracted for metallogenic prediction, and a total of fourteen A-level metallogenic prospects and three B-level metallogenic prospects is delineated. It could provide theoretical and practical reference for prospecting in the study area. |
| Keywords:sedimentary metamorphic iron deposit multi-source geological information extraction and analysis weight of evidence method two-dimensional metallogenic prediction west section of the northern Qilian Mountains |
| 王浩楠，陈建平，刘浩.祁连山北缘沉积变质型铁矿综合信息找矿预测[J].地质学刊,2023,47(3):297-304 |
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