断层泥中石英碎砾溶蚀形貌的测年研究

Fault Dating by the Surface Textures of the Quartz Grains in Fault Gouge

考虑到同一条断层的同一个位置所取的断层泥中,不同碎砾的溶蚀形貌并不相同,即使是同一个碎砾,其不同的表面,溶蚀形貌也可能不同,将统计学参数估计的方法引入结果处理中,并把在金川水电站坝区F1断层一次所取得断层泥样品碎砾的各个表面的总体当作一个整体进行处理,得出此断层的活动时间可能为早更新世的结果。与ESR法测得的结果基本一致。

The surface textures of the quartz grains at the same position of a fault are different, furthermore, even the same quartz grain, its every facies may be different each other. So we introduce statistical parameter estimation method into the data process, and regard all facieses of the quartz grains as a whole in the dating of fault F1 south of the dam area of the Jinchuan hydropower station. The result indicates that the last strong movement of fault F1 probably occurred in Early Pleistocene, which agrees with the result obtained by the Electronic Spin Resonance method.