Study of the Late Quaternary Slip Rate along the Northern Segment on the South Branch of Longling-Ruili Fault

• 责任者：Huang Xuemeng (Institute of Crustal Dynamics ; China Earthquake Administration ; Beijing 100085 ; China) ; Du Yi
• 刊名：Seismology and Geology
• 出版年：2010
• 卷期：32(2)
• 关键词：活动构造 ; active tectonics ; 活动断层 ; active faults ; 云南 ; Yunnan Province
• 页码：p.222-232
• 图表：5 illus., 4 tables, 15 refs.
• 分类号：0300
• issnNo：ISSN0253-4967
• isbnNo：CN11-2192/P

///Based on interpretation of remote sensing images, quantitative geomorphologic deformation measurement and dating of young terrace deposits and alluvial fans, the paper obtains some new results as follows: the northern segment of Longling-Ruili Fault is a Holocene dextral strike-slip fault with a normal slip component. The terrace T1 composed mainly of alluvial deposits formed during 4 ka B.P. was offset by the northern segment of the Longling-Ruili Fault, with left-lateral and vertical displacements of 8～12 m and 2 m, respectively. The Late Pleistocene alluvial fan was dislocated with a left-lateral and vertical displacement of 70 m and 18 m, respectively. The proportion of horizontal to vertical displacement is about 4∶1, that means the vertical rate on the northern segment of Longling-Ruili Fault is about 25% of horizontal slip rate. The left-lateral slip rate in Late Holocene is well consistent with GPS measurement. The strike slip rate is in good consistency in different time scales since Late Pleistocene epoch, indicating that the activity of the Longling-Ruili Fault is stable.