青海格尔木市野马泉M14磁异常区三维地质建模与成矿预测

3D geological modeling and metallogenic prediction of Yimaquan M14 magnetic anomaly area in Geermu City of Qinghai

野马泉M14磁异常区位于祁漫塔格成矿带,为接触交代热液(矽卡岩)型铁多金属矿床。根据最新勘查成果,运用3DMine三维建模软件建立矿区三维可视化的钻孔模型、地表及范围模型、地层模型、断层模型、岩体模型、蚀变带模型、矿体模型、磁异常模型,进而建立矿区块体模型。通过综合分析矿区成矿地质特征确定矿床找矿标志,利用标志变量对块体模型进行赋值,从而进行定量成矿预测。通过属性约束圈定4个找矿靶区,并对各靶区进行找矿潜力分析。借鉴传统成矿预测方法,探索在三维建模的基础上进行定量成矿预测,实践表明该方法简便快捷、易于实现。

Yemaquan M14 magnetic anomaly area is located in Qimantage metallogenic belt,which is a contact metasomatic hydrothermal(skarn)type iron polymetallic deposit.Based on the latest exploration result,3DMine modeling software is used to establish 3D visualization drilling hole model,surface and range model,stratum model,fault model,rock mass model,alteration zone model,ore body model,magnetic anomaly model,and then the block model is established in the mining area.Through comprehensive analysis of ore-forming geological characteristics of the mining area,the ore-prospecting indicators of the deposit are determined,and the value of the block model is assigned by the marker variables,so as to carry out quantitative metallogenic prediction.Four prospecting target areas are delineated by attribute constraints,and the prospecting potential of each target area is analyzed.This study uses the traditional metallogenic prediction method for reference to explore for quantitative metallogenic prediction based on 3D modeling.The practice shows that this method is simple,fast and easy to realize.