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作者Chung, Ling-Ho;Chen, Yue-Gau;Yu, T.;Cao, Zhongquan;Yin, Gongming
出版日期200812
著作名稱New geomorphic evidence for en echelon fault system in East Karakoram - Jiali Fault zone.
會議論文集2008AGU Fall Meeting
頁數T53D-2004
會議地點舊金山
國際性會議Y
主題地質
摘要The Karakoram-Jiali Fault zone (KJFZ) is one of the important active fault systems in the Tibetan Plateau. This zone mainly consists of two major faults (i.e., Karakoram fault and Jiali fault) and other minor faults in between. In the middle of KJFZ, there are several en échelon minor faults, such as the faults of Beng Co, Gyaring Co, Lamu Co, and Awong Co. Those faults are all right-lateral strike-slip faults and striking N120°- 130°E. In the east of the Beng Co fault and Jiali Fault, there are still several lineations striking parallel to the Beng Co fault. They are located at 31-32°N, en échelon in configuration, similar in length, and subparallel to each other. In this study they are tentatively regarded as part of the KJFZ. Based on Landsat7 and ASTER satellite imagery, we find a number of geomorphic features to interpret them as active faults. One of above-mentioned minor faults located in the immediate west is identified with the offset of the last glacial moraine, many abandon channels, disrupted stream beds, and shutter ridges, etc. Based on a previously published TL date, the slip rate of this fault is ca. 15 ± 2 mm/yr. According to previous study, the Jiali Fault possesses rapid dextral slip rate (15-20mm/yr) and the maximum observed offset is ca. 1.5km. Both of our imagery analysis and field survey found no evidence to indicate the late Pleistocene activity of the main trace of the Jiali fault. We therefore incline to conclude that instead of the main Jiali Fault those en échelon faults in its west are relatively more active at least since late Pleistocene.
資料連結Full Text
系統號NO000004568

Aug 16 2018 10:46:44
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