Dynamic Characteristics of the Yishu Fault Zone, Central Segment of the Tan Lu Fault Zone, Shandong Province, China: Inferred from the Distribution Patterns of Drainages
详细信息
- 责任者：Lin Aiming (Department of Geophysics ; Graduate School of Science ; Kyoto University ; Kyoto 606-8502 ; Japan) ; Rao Gang
- 刊名：Earth Science Frontiers
- 出版年：2013
- 卷期：20(4)
- 关键词：断裂带 ; fracture zones ; 构造分析 ; structural analysis ; 水系型式 ; drainage patterns ; 郯庐断裂带 ; Tancheng-Lujiang Fault Zone
- 页码：p.125-136
- 图表：illus., 36 refs.
- 分类号：0300
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
The Yishu Fault Zone,the central segment of the Tan Lu Fault Zone(TLFZ),located in Shandong Peninsula,eastern China,is composed of four major faults,called F1 F4 from east to west,forming a 50-km-wide zone.In this study,we analyzed the distribution pattern of drainage systems developed along the Yishu Fault Zone mainly on the basis of the interpretations of Digital Elevation Model(DEM) data,Landsat Enhanced Thematic Mapper(ETM),and Google imagery data and field investigations.Our results reveal that the streams and gullies are mainly restricted by the Yishu Fault Zone along the graben structures bounded by F1 F2 and F3 F4 faults,respectively,in the northern segment of the Yishu Fault Zone,and are constrained by F1 and F2 faults but not by F3 and F4 faults in the southern segment.Geologic and topographic evidence shows that the Yishu Fault Zone is characterized by the deformational features of normal-reverse faults with high dip angle of 70°-90° and that F1 and F2 faults are currently active but F3 and F4 faults are inactive in the Quaternary.Our results confirm that the topographic features of drainage systems are reliable indicators of ground deformation along the pre-existing fault structures and can be used for studying the activity and dynamic characteristics of active faults.
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