内蒙古花脑特银多金属矿Ⅰ号蚀变带构造叠加晕三维模型研究及应用

花脑特银多金属矿位于内蒙古锡林郭勒盟东乌珠穆沁旗境内,矿区内共有4条蚀变带,其中Ⅰ号蚀变带为已发现的最大含矿带。为查明花脑特矿区Ⅰ号蚀变带三维地质特征以进行深部盲矿预测,依托CnGIM-ma软件构建了花脑特矿区Ⅰ号蚀变带三维地质模型,包括几何模型和属性模型。通过几何建模,清晰地展示了Ⅰ号蚀变带深部地质结构特征,解决了长期困扰矿山地质人员的岩体侵入接触界面展布问题;通过属性建模,完成了Ⅰ号蚀变带各单元素的三维异常图,并对前缘晕元素（Hg、B、Sb、As）、近矿晕元素（Ag、Pb、Zn、Cu、In、Au）异常在三维属性模型中的综合表达方法进行了研究探索,最后选用“分带赋值法”建立了前缘晕、近矿晕的综合属性异常模型,在已知矿体的深部预测了2个成矿靶区,可与传统构造叠加晕研究预测位置较好吻合。

Research and application of 3D model for structural superposition halos in No. I alteration zone of the Huanaote silver polymetallic deposit in Inner Mongoli

The Huanaote silver polymetallic deposit is located in the eastern Ujumuqin Banner of Xilingol League, Inner Mongolia. This deposit contains four alteration zones, and the No. I alteration zone is the largest discovered ore-bearing zone. This work aims to determine the three-dimensional geological characteristics of the No. I alteration zone, which will help to predict deep blind ores in the Huanaote deposit. A three-dimensional geological model of the No.1 alteration zone was constructed based on the CnGIM-ma software, including geometric model and attribute model. Through geometric modeling, the characteristics of deep geological structures of the No. I alteration zone were clearly displayed, which has determined the distribution of the rock mass intrusion contact interface that has long troubled mine geologists. Through attribute modeling, the three-dimensional anomalies of each single element in the No. 1 alteration zone were described. The comprehensive expression method of the front halo elements (Hg, B, Sb, As) and near-ore halo elements (Ag, Pb, Zn, Cu, In, Au) anomalies in the three-dimensional attribute model was studied and explored. And the "zoning assignment method" was selected to establish comprehensive attribute anomaly models for the front halos and near-ore halos, and two metallogenic targets were predicted in the depth of the known ore bodies.