内蒙甲─查银多金属矿区控矿构造

THE ORE-CONTROLLING STRUCTURES OF JIAWULA-CHAGANBULAGEN SILVER POLYMETALLIC ORE DEPOSITS, INNER MONGOLIA

内蒙甲一查银多金属矿床是由燕山期构造岩浆作用形成的后火山热液脉状矿床。矿体的形态、产状、厚度、品位等完全受控于成矿期断裂的性质及其产状、规模。本文论述了矿区的控矿断裂特征，并指出在进一步找矿中应注意采用构造地球化学方法、追索和寻找活动时间较长、规模较大、成矿期为张剪性或压剪性的NWW、NNW向断裂。

The Jiawula- Chaganbulagen silver Polymetallic ore deposits are of petvolcanic hydrothermal vein type, formed from Yenshan xnagmatism. Shapes, occurrences, thicknesses and tenors of the ore bodies were controlled by features, occurrences and sizes of the fractures active during the mineralization period. Features uf the ore-controlling fractures have been discord in this peper and a suggestion has been made that some major tensional or compressional shear fractures in NWW and NNW orientution, with long-duratiun activities during the mineralization period, should be searched and followed up by structure geucllemical methud as they Could be regarded as helpful indicaturs in ore prospecting.