综合物探方法在锰矿勘查中的应用

锰矿的物理性质和化学性质一般与围岩没有明显差异,决定了锰矿的勘探难度.尤其是埋深较大、后期改造强烈的矿床,勘探难度更大.在陕南汉中宁强一处锰矿勘查中,利用传统物探手段,打破常规勘探思路,利用综合物探方法,最后取得较为理想结果.实例结果说明,地面高精度磁测不能简单地认为一定有要有传统理念意义上的磁性差异,关键的问题在于如何去应用和解释;火山沉积型锰矿也不是传统思想上的没有激电异常,而是有足够强的信号,完全可以根据激电异常指导深部地质勘查工作.同时,还要注意到,深部地质勘查工作离不开综合物探勘查技术.大胆使用综合物探勘查技术,才可能提出新的找矿勘查空间和新的找矿勘查方向.

APPLICATION OF COMPREHENSIVE GEOPHYSICAL PROSPECTING METHOD IN EXPLORATION OF MANGANESE DEPOSITS

There is little difference between the physical and chemical properties of manganese orebodies and those of their wallrocks. That means the exploration for manganese deposits is difficult, especially for those with deep burial and intense reformation. In the manganese prospecting in Ningqiang area of Shaanxi Province, with traditional geophysical measures but unconventional ideas, a satisfied result is obtained. The practice shows that the magnetic difference is not necessarily desired for high-precision ground magnetic survey. The key is to apply and explain properly. The volcanic sedimentary type of manganese deposits is not without IP anomaly as that described by traditional theory. Instead, the IP signal is strong enough to guide deep exploration.