| 三维综合信息分析圈定北衙金矿床深部靶区 |
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| 引用本文： | 周放,王保弟,贺娟,郝明,王鹏,董芸希.三维综合信息分析圈定北衙金矿床深部靶区[J].地球科学,2020,45(8):3028-3039. |
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| 作者姓名： | 周放 王保弟 贺娟 郝明 王鹏 董芸希 |
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| 作者单位： | 1.中国地质调查局成都地质调查中心, 四川成都 610081 |
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| 基金项目： | 国家重点基础研究发展计划（973计划）项目2018YFC060410603国家重点基础研究发展计划（973计划）项目2016YFC0600305 |
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| 摘 要： | 在三维空间中综合已揭露浅部地质和深部地球物理资料进行深部预测，既能深化浅部认识，还能减少地球物理多解性带来的困扰，成为深部成矿预测的新趋势和重要手段.以北衙金矿床万硐山矿段为例，通过收集钻孔、勘探线剖面、化探和地球物理等资料，在三维建模平台中建立了万硐山矿段三维地质模型；基于建模结果，综合地表、浅部和深部重力资料，对成矿地质条件和深部成矿潜力进行了研究和分析，筛选出隐伏断裂、斑岩体和青天堡组砂岩3种成矿有利要素，对应建立了成矿有利区三维体模型（sgrid）.在此基础上，采取多源信息综合方法，对3种成矿控制要素的有利成矿区域取交集，圈定了万硐山矿段海拔1 100~900 m内深部靶区，为周边同类型矿段深部靶区预测提供了参考.
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| 关 键 词： | 北衙金矿床 三维建模 成矿潜力 多源信息综合 深部靶区 地球物理 |
| 收稿时间： | 2020-03-02 |
Deep Ore Body Targeting Based on 3D Integrated Information |
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| Abstract: | The combination of subsurface geology and deep geophysics data is a new tendency and method for the mineralizing prognosis of deep zone in the three-dimensional space, of which the results can deepen the cognitions of subsurface feature and reduce risks from multiplicities of geophysical interpretations. Focused on the Beiya gold deposit, 3D visualization of Wandongshan key ore sections was realized by using the GOCAD modeling platform based on the geological, geochemical, and deep geophysical data in this study. Furthermore, metallogenetic regularity and deep metallogenic potential of geological bodies were analyzed, and three favorable factors were screened out for mineralization including hidden faults, beschtauite, and Qingtianbao sandstone.In addition, corresponding sgrid was established. Comprehensive multi-source information synthesis method was adopted to locate deep buried ore body of Wandongshan ore section with an altitude between 1 100-900 m via obtaining results from intersections of three favorable areas for mineralization. This study provides an important reference for the prediction of deep target area in this belt as well as in similar type of ore sections in the surrounding areas. |
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