山东姜家窑金矿岩体内成矿构造波动原理分析

WAVE PRINCIPLE ANALYZING OF MINERALIZED STRUCTURE IN THE ROCK BODY OF JIANGJIAYAO GOLD DEPOSIT

姜家窑金矿位于东西向胶东复背斜西端，北东向招平断裂带中段。矿区地层以断裂为界，下盘为玲珑花岗岩，上盘为太古宇胶东群变质岩。矿区内的招平断裂带下盘入字型次级断裂较发育，且延伸至玲珑花岗岩岩体内部，在二者所构成的锐角扇形区的岩体中，形成一系列具有等间距分布的岩石破碎块段，造成岩石破碎的直接原因是岩体内的共轭节理。同时根据地质力学原理，其锐角扇形区为应力拉张区，有利于成矿，所以姜家窑金矿的矿体除了沿招平断裂带下盘分布外，岩体内部岩石具有共轭节理的破碎块段也直接构成工业矿体。应用波动原理对岩体中共轭节理的成因及矿体分布的等间距性能作出较好的解释。

Jiangjiayao gold deposit is located in west end of EW oriented Jiaodong anticlinorium and midst paragraph of NE oriented Zhaoping fault zone. Mining area stratum is divided by fault, in which footwall is made of Linglong granite and hanging wall is made of regional metamorphic rock of the Archean Erathem’s Jiaodong group. The secondary fault of lambda type in footwall of Zhaoping fault zone is developed and extends to inner rock body of Linglong granite. In the rock body located in the acute angle fan shaped area of the lambda type faults, there have been a series of shattered rock mass with equidistance distribution. The direct cause of rock shattered is conjugated shear joint within rock body. In accordance with the principle of geological mechanics, acute angle fan shaped area is tension area, which is beneficial to mineralization. Therefore, in Jiangjiayao gold deposit, besides the ore body distributed along the footwall of Zhaoping fault zone, the shattered rock mass with conjugated shear joint within rock body directly form industrial ore body too. Using wave principle, the paper explained the genesis of conjugated shear joint and the distribution equidistance of ore body inner rock body.