江南断裂带（宣城段）断层泥中石英颗粒微形貌特征及年代学意义

在野外地质调查基础上，对江南断裂带宣城敬亭山剖面上采集的3件断层泥样品中的石英颗粒进行透射扫描电镜（SEM）微形貌观察与统计。结果显示，江南断裂带为活动断裂，在新近纪和第四纪时期具明显的活动性，活动始于中新世，晚更新世达到高峰，活动方式以蠕滑为主；至全新世，断裂以粘滑方式持续活动；沿断裂带的地震记录表明，至近现代断裂仍处于活动状态。这些结论对于正确评价江南断裂带在第四纪的活动规律及该区自然灾害预防等具有重要意义。

Micromorphology of Quartz in Fault Gouges of the Jiangnan Fault Zone(Xuancheng Section) and Its Chronological Significance

On the basis of field investigation, the quartz particles in three gouge samples collected from Xuancheng-Jingting mountain section of Jiangnan fault zone, are observed and counted by transmission scanning electron microscopy(SEM). The results show that Jiangnan fault zone is an active fault zone, which has obvious activity in the Neogene and Quaternary. The activity began in the Miocene and reached its peak in the late Pleistocene. The main mode of activity is creep slip. In the Holocene, the faults continue to move in the way of stick slip. Seismic records along the fault show that the fault is still active until modern times. This conclusion is of great significance for correctly evaluating the Quaternary movement of the Jiangnan fault zone and preventing natural disasters in this area.