图1 基于成矿过程数值模拟的隐伏矿双向预测技术路线

Fig.1 Technical flow chart of the two-way forecasting method

图2 研究区地质概况(据文献[36]修改)

Fig.2 Geological sketch map of the study area. Modified after [36].

图3 以地南金矿三维模型 1—石英闪长岩;2—下二叠统大关山群地层;3—断裂;4—矿体。

Fig.3 3D model of the Yidinan gold deposit

图4 以地南金矿各要素三维实体模型 a—下二叠统大关山群地层;b—石英闪长岩;c—断裂;d—矿体。

Fig.4 3D model of each geological unit in the Yidinan gold deposit

图5 成矿过程数值模拟的研究思路(据文献[34]修改)

Fig.5 Research scheme of numerical simulation of mineralization process. Modified after [34].

图6 中温热液型金矿成矿模式(据文献[36]修改)

Fig.6 Metallogenic model of mesothermal gold-quartz deposits. Modified after [36].

图7 以地南金矿成矿过程模拟模型设计简图

Fig.7 Design of the numerical simulation model for the mineralization process in the Yidinan gold deposit

图8 成矿过程数值模拟几何模型 group2—地层;group3—断裂;group4—石英闪长岩。

Fig.8 Geometric model for numerical simulation of mineralization processes

图9 模拟过程中某时刻空隙压力值分布特征

Fig.9 Distribution characteristics of pp values during numerical simulation

图10 模拟过程中某时刻体积应变值分布特征

Fig.10 Distribution characteristics of vsr values during numerical simulation

图11 模拟过程中某时刻温度场分布图

Fig.11 Temperature distribution characteristics during numerical simulation

图12 pp值和vsr值与已知矿体统计直方图

Fig.12 Statistics of ore cubes with different pp (left) or vsr (right) values

图13 空隙压力有利区分布 1—地层;2—断裂;3—空隙压力有利区块体。

Fig.13 Distribution of metallogenic blocks with favorable pp values

图14 体积应变有利区分布图 1—地层;2—断裂;3—体积应变有利区块体。

Fig.14 Distribution of metallogenic blocks with favorable vsr value

图15 空隙压力和体积应变共同有利区分布 1—断裂;2—空隙压力和体积应变共同有利区块体。

Fig.15 Distribution of metallogenic blocks with both favorable vsr and pp values

图16 断裂等密度值与已知矿块统计

Fig.16 Histogram of structural isodensity of ore cubes

图17 断裂等密度成矿地质异常体 1—断裂;2—断裂等密度有利成矿取值范围内块体。

Fig.17 Distribution of abnormal metallogenic blocks with for fault planes isodensity values favorable

图18 证据权重法预测结果 1—地层;2—岩体;3—证据权重法后验概率高值块体;4—断裂;5—后验概率值P满足0.66≤P<0.67的块体;6—后验概率值P满足0.67≤P<0.68的块体;7—后验概率值P满足0.68≤P的块体。

Fig.18 Prediction result for the study area from the weight-of-evidence model

图19 信息量预测结果 1—信息量值I满足3.4≤I<3.6的块体;2—信息量值I满足3.6≤I的块体;3—地层;4—石英闪长岩;5—断裂。

Fig.19 Prediction result for the study area from the information-computation model

图20 证据权重法和信息量法共同预测结果 1—后验概率值P满足0.66≤P,并且信息量值I满足3.4≤I的块体;2—断裂。

Fig.20 Prediction results for the study area using both the weight-of-evidence and information- computation models

图21 双向预测结果

Fig.21 Prediction results using the two-way forecasting method