Abstract: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.
HE Chaofeng,ZHANG Chunguang,WANG Qiuliang et al. Micro-Morphology Characteristics and Dating Implications of the Gouge Quartz of Xiannüshan-Jiuwanxi Fault[J]. jgg, 2017, 37(4): 355-360.