云南相大铜铅锌多金属矿区高精度磁测异常特征及解释

Characteristics and interpretation of high-precision magnetic anomalies in Xiangda ore field of Yunnan,China

云南相大铜铅锌多金属矿的赋矿(或伴生)岩石与其周围岩石之间存在着磁性差异,在其上利用高精度磁测方法,能观测到明显的磁异常。通过分析研究区高精度磁测异常特征及地质、地球物理、地球化学特征,解释了磁异常的地质原因,推断矿(化)体的赋存位置和控矿构造的空间特点,指出了寻找铜铅锌多金属矿的靶区。该方法在间接寻找矿产资源方面具有十分重要的作用与广泛的前景。

There exists magnetism difference between the ore-bearing rock and its wall rocks in Xiangda ore field in Baoshan, Yunnan. Magnetic anomalies can be measured on the field by high- precision magnetic survey method. The cause of the magnetic anomalies is interpreted by the assaying anomaly characteristics. Geological and geophysical characteristics are used at the same time. The location of the ore-bearing structure and the target area of the metallic ore are pointed out after the interpretation, New ideas about the characteristics of the high-precision magnetic anomalies on orebearing rock and its wall rocks must be useful to explore indirectly the metallic ore deposits with high- precision magnetic survey. The method plays a very important role in searching for mineral resources indirectly and has a wide-ranging foreground.