高精度重磁测量在河南崤山金矿区调查评价中的应用

通过对河南崤山金矿区重磁资料数据的处理,分离了深源与浅源场,并结合物性特征解释重磁异常。研究区高精度重力异常主要反映断裂构造、隐伏岩体和崤山古地块分布特征,高精度磁力异常反映中酸性隐伏岩体分布特征。结合地质资料,综合分析和研究重磁异常特征,推测了与金矿有关的断裂及隐伏岩体的平面和三维空间分布位置。依据重磁异常特征和已知金矿床赋存规律,对成矿远景区段进行预测与评价,预测金矿远景区2处。对今后在研究区中深部和外围同类矿床的勘查中缩小目标靶区、合理选择勘探方法等具有一定的实际意义。

Application of high precision gravity and magnetic survey in investigation and evaluation of the Xiaoshan gold mine, Henan Province

Gravity and magnetic data processing of the Xiaoshan gold mine of Henan Province helped to delineate the fields of deep source and shallow source. Physical characteristics were used to interpret gravity and magnetic anomalies. The high-precision gravity anomaly in this area mainly reflects the distribution features of fault structure, concealed rock mass and Xiaoshan kern, while the high-precision magnetic anomaly visualized the distribution features of intermediate-acid concealed rock mass. Combined with geological data as well as comprehensive analysis of the characteristics of gravity and magnetic anomalies, the plane and three-dimension distribution of faults and concealed ores associated with gold deposits are deduced. Based on the characteristics of gravity and magnetic anomalies and the occurrence regularity of known gold deposits, two prospective areas of gold deposits are predicted with the prediction and evaluation of the metallogenic area. This is of great practical significance in narrowing target area, reasonably selecting exploration method in future investigation of medium and deep deposits as well as peripheral similar deposits in the area.