| 郯庐断裂带中段第四纪活动及其分段特征 |
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| 关键词:Tan-Lu fault zone Neotectonics fault segmentation block kinematics |
| 基金项目:自然科学基金项目(编号:49972076)，中德合作项目“大别山超高压岩石变形及折返机制” |
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| 摘要: |
| Quaternary Activity and Segmentation Behavior of the Middle Portion of the Tan-Lu Fault Zone |
| The Tan-Lu fault zone is one of the major lithospheric discontinuities in eastern China. The middle portion of this fault zone in Shandong and Jiangsu provinces was subjected to strong right-lateral reactivation during Neotectonic era, forming a conspicuous transpressional strike-slip boundary in North China.Based on field observations together with TM imagery interpretation and focal mechanism solutions of earthquakes, this paper describes Quaternary active features and segmentation behavior of the Tan-Lu fault zone. It is pointed out that the middle portion of the Tan-Lu fault zone can be divided into three main segments, i.e., the Anqiu-Maobu segment, the Wanghu-Suqian segment and the Suqian-Jiashan segment in southward succession, and each of them might be ruptured independently. Quaternary strike-slip faulting is prevalent along the central and northern segments, north of Suqian, where two strong historical earthquakes once occurred, whereas the faulting weakens along the southern segment in Jiangsu and Anhui provinces. This along-strike segmentation behavior of the Neotectonic activity of the Tan-Lu fault zone accommodated book-shelf motion of blocks in North China. |
| SHI Wei,ZHANG Yue-qiao,DONG Shu-wen.2003.Quaternary Activity and Segmentation Behavior of the Middle Portion of the Tan-Lu Fault Zone[J].Acta Geoscientica Sinica,24(1):11-18. |
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