仙女山-九畹溪断裂带断层泥石英微形貌特征及其年代学意义

在仙女山-九畹溪断裂带野外地质调查的基础上采集12件断层泥样品，并对样品进行石英碎砾提取和扫描电镜微形貌观察。结果表明，仙女山断裂为一条以粘滑为主的活动断裂，最近一次较大规模的运动发生在中-晚更新世；九畹溪断裂带具有多期活动迹象，早期活动强于晚期，近期强烈活动在上新世至中更新世，为一条以粘滑运动为主的活动断裂。仙女山-九畹溪断裂带所构成的V型断裂组合表现为以仙女山断裂带为主导的构造格局。

Micro-Morphology Characteristics and Dating Implications of the Gouge Quartz of Xiannüshan-Jiuwanxi Fault

On the basis of extensive field geological survey of the Xiannüshan-Jiuwanxi fault, we collect 12 gouge samples, extract the quartz and observe their micro-morphology by SEM. The results show that the Xiannüshan fault is an active fault essentially characterized by stick-slip, and that recent large-scale movement happened in the middle-late Pleistocene period. The Jiuwanxi fault is also an active fault essentially characterized by stick-slip with multi-periodic activities, with early activities much stronger than late ones. Its last activity has taken place during the Pliocene and the middle Pleistocene period. Furthermore, the “V” glyph fracture combination formed by the Xiannüshan-Jiuwanxi fault presents a tectonic pattern which is dominated by the Xiannüshan fault.