| 海原走滑断裂带及其尾端挤压构造 |
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| 引用本文： | 邓起东,张维岐.海原走滑断裂带及其尾端挤压构造[J].地震地质,1989,11(1):1-14. |
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| 作者姓名： | 邓起东 张维岐 |
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| 作者单位： | 国家地震局地质研究所
(邓起东，张培震，宋方敏，汪一鹏)，宁夏回族自治区地震局
(张维岐，焦德成)，美国麻省理工学院地球、大气和行星科学系
(B.C.伯奇菲尔，P.莫尔纳，L.雷登)，中国地质大学
(陈社发)，国家地震局
(朱世龙)，宁夏回族自治区地震局(柴炽章) |
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| 摘 要： | 研究了青藏高原东北部地区海原活动断裂带的几何学、运动学和动力学特征、左旋位移总量及全新世滑动速率,对海原走滑断裂带东南端发育的尾端挤压区的构造特征及地壳缩短量进行了研究,分析了走滑断裂带的走滑量与端部挤压区地壳缩短量之间的转换平衡关系
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| 关 键 词： | 海原 走滑断裂 尾端挤压构造 地壳缩短 |
HAIYUAN STRIKE-SLIP FAULT ZONE AND ITS COMPRESSIONAL STRUCTURES OF THE END |
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| Deng Qi-dong,Zhang Wei-qi,Zhang Pei-zhen,Jiao De-cheng,Song Fang-min,Wang Yi-peng,B. C. Burchfiel,P. Molnar,L. Royden,Chen She-fa,Zhu Shi-long and Chai Zhi-zhang.HAIYUAN STRIKE-SLIP FAULT ZONE AND ITS COMPRESSIONAL STRUCTURES OF THE END[J].Seismology and Geology,1989,11(1):1-14. |
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| Authors: | Deng Qi-dong Zhang Wei-qi Zhang Pei-zhen Jiao De-cheng Song Fang-min Wang Yi-peng B C Burchfiel P Molnar L Royden Chen She-fa Zhu Shi-long and Chai Zhi-zhang |
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| Abstract: | Haiyuan active fault zone is a main active fault in the northeast boundary of Qing-hai-Xizang plateau. Geologically, mapping of 1:50,000 has been made along the fault zone. The results show that Haiyuan active fault zone, 237km long, striking WNW in its west segment and striking NW in the east segment, has been a strike-slip fault sense since middle-late early Pleistoncene. The horizontal offset is 12-14.5km from middle-late early Pleistocene, with the slip rate of 11.7-19.2mm/a. The strong activity has been going on since the begining of the Holocene, with the sinistral strike slip rate of 6-10mm/a.Haiyuan strike slip fault zone consists of 11 secondary shear faults, mostly left stepping pinnate, partly right stepping pinnate. 8 pull-apart basins and 2 pushed-up blocks were formed along the fault zone. Pull-apart basins showing 2 types of romb and elongated, big ones began to develop in middle Pleistocene, small ones in late Pleistocene. The largest thickness of sediments is greater |
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| Keywords: | Haiyuan Strike-slip fault Compressional structure of the end Crustal shortening |
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