山东焦家金成矿带三维地质建模及成矿预测

以山东焦家金成矿带为研究对象,将焦家金矿带的二维地质资料有效整合,应用三维建模软件Surpac,首次建立了该矿区的三维数字矿山模型.以此模型为基础,以地质统计方法为手段,分析成矿规律,建立找矿模型.成矿预测中利用“立方体预测模型”找矿方法、找矿信息量法和证据权法来预测资源量,按照信息值的等级依次圈定了6个成矿靶区.用体积估计法和丰度值估计法2种完全不同的计算方法来预测资源量,2种方法得到的找矿靶区资源量均约为380 t,说明计算的结果具有一致性和稳定性.

3D geological modeling and metallogenic prognosis of Jiaojia gold metallogenic belt in Shandong

The authors took Jiaojia gold metallogenic belt in Shandong Province as a study object, and with application of Surpac software, integrated the 2D geological data of Jiaojia gold belt effectively into 3D modeling to establish 3D model for the digital mine for the first time in the study area. Based on the digital mine and geological statistics methods, the authors analyzed the metallogenic regularity and established a prospecting model. During metallugenic prognosis, the authors used ＇ cube prediction model＇ mineral exploration method, prospecting information contents and weights of evidence method to predict the amount of gold resources. In particular, six metallogenic targets according to the information value ranks were delineated. With the volume estimation method and abundance estimation for the two different computational methods for metallogenic prediction, the gold potential resources obtained by the two methods were both about 380 t, showing the calculated results were characteristic of consistency and stability.