LIU Hai-ming1, SHEN Jun-feng1*, CAO Zhong-quan2, YIN Ke-jian2, LIU Chang1, LIU Ting1, LI Jie1, FENG Shao-hua1
1. School of Earth Sciences and Resources, China University of Geosciences(Beijing), Beijing 100083, China;
2. Seismological Bureau of Tibet Autonomous Region, Lhasa 850003, China
Abstract: In order to determine the chronology and the activity of the Ladui-Naidong Faults (LNF) at Xigaze, Tibet, we examined quartz samples of two fault gouge samples collected from the LNF fault. The quartz samples were carefully observed and counted under SEM and the statistic histograms were made according to the occurrence frequency of the surface micro-morphologies. The results showed that the LNF had obvious activities since the Quaternary and the micro-morphology of the quartz showed lots of texture combinations of conchoidal texture, subconchoidal texture and orange peel texture, indicating that the LNF reached its peak period of activity in the middle Pleistocene and is still active in the Holocene.
Keywords: fault gouge quartz micro-morphology active fault activity time Tibet
*Corresponding Author, E-Mail: shenjf@cugb.edu.cn
Bulletin of Mineralogy, Petrology and Geochemistry Vol. 34, No.1, 2015, page 149-154
