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矿床地质  2004 

大兴安岭东南部太平山地区断裂控矿作用及控矿应力场

Keywords: 地质学,断裂控矿作用,控矿应力场,太平山地区

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Abstract:

根据控矿断裂构造的分期配套及其交切关系研究,发现大兴安岭东南部太平山地区内生金属矿床的形成与中生代多次转换的区域构造应力场及其所形成的断裂直接相关。太平山地区在中生代经历了4期具不同区域构造应力场的控矿构造运动:①晚侏罗世晚期至早白垩世早期,形成NEE走向的矿化隐爆角砾熔岩带;②早白垩世晚期,造成了大量近EW(或NWW)和NW(或NNW)走向的共轭张_张扭性断裂,该期为主成矿期;③晚白垩世,形成并复活了近SN向(或NNE向)和NE65°的两组共轭张扭性断裂,沿断裂充填了中酸性脉岩和铁矿;④晚白垩世之后,发育NNW向挤压的区域构造应力场。

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