Late Quaternary Active Characteristics and Slip-Rate of Pingding-Huama Fault,the Eastern Segment of Guanggaishan-Dieshan Fault Zone(West Qinling Mountain)
详细信息
- 责任者：Yu Jingxing (State Key Laboratory of Earthquake Dynamics ; Institute of Geology ; China Earthquake Administration ; Beijing 100029 ; China) ; Zheng Wenjun
- 刊名：Quaternary Sciences
- 出版年：2012
- 卷期：32(5)
- 关键词：活动断层 ; active faults ; 秦岭 ; Qinling Mountains
- 页码：p.957-967
- 图表：illus., 35 refs.
- 分类号：0300
- isbnNo：CN11-2708/P
摘要
Along the western segment of the Pingding-Huama fault,significant linear characteristics,scars,and fault scarps cutting several alluvial fans can be easily distinguished,indicating that the western segment is active since the Late Quatenary and the elapsed time of the last event should be less than 1 kaB.P.
The authors estimated the slip rates of the western segment through geomorphology analysis and dating the age of the top surface of the terraces and deformed strata(OSL).In summary,at present the Pingding-Huama fault is active along its western segment while shows very weak deformation along the eastern segment.Combining previous studies support the interpretation that the slip along east Kunlun fault mainly transforms into West Qinling fault by Pingding-Huama fault and others at the region,and is absorbed by these faults and the deformation of basins among mountains.
The authors estimated the slip rates of the western segment through geomorphology analysis and dating the age of the top surface of the terraces and deformed strata(OSL).In summary,at present the Pingding-Huama fault is active along its western segment while shows very weak deformation along the eastern segment.Combining previous studies support the interpretation that the slip along east Kunlun fault mainly transforms into West Qinling fault by Pingding-Huama fault and others at the region,and is absorbed by these faults and the deformation of basins among mountains.