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| 引用本文： | 赵俊香,江娃利,郭慧,于慎谔.??????￥????????????????????????????[J].大地测量与地球动力学,2012,32(5):12-16. |
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| 作者姓名： | 赵俊香 江娃利 郭慧 于慎谔 |
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| 作者单位： | 1. 中国地震局地壳应力研究所(地壳动力学重点实验室),北京100085;中国地质大学地球科学与资源学院,北京100089
2. 中国地震局地壳应力研究所(地壳动力学重点实验室),北京,100085 |
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| 基金项目： | 中央级公益性科研院所基本科研业务专项(ZDJ2010-24,ZDJ2007-1,ZDJ2007-14) |
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| 摘 要： | ?????????(4??11 ??m)???????????????SMAR????????????????1976????????????￥????????е???????????????о?????????????????????????????????????????????????????????????????????????????????????????????????о???????????????50~7.16 ka???????????????????????????????????????????????????????????????????????????????????С???0.03 m/ka??????????0.6 m??????????1976???????????ɡ?75~50 ka??????????~50 ka????????????????????~0.1 m/ka??????ζ?????????????????????????????????~0.2 m/ka????????о???????????????仯????????????????????????????
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| 关 键 词： | ??? ???￥??? ????? ???????? ??????? |
OPTICAL DATING OF SUNJIALOU TRENCH IN TANGSHAN AND ITS SIGNIFICANCE FOR PALAEOSEISMIC EVENTS |
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| Zhao Junxiang,Jiang Wali,Guo Hui,Yu Shen’e.OPTICAL DATING OF SUNJIALOU TRENCH IN TANGSHAN AND ITS SIGNIFICANCE FOR PALAEOSEISMIC EVENTS[J].Journal of Geodesy and Geodynamics,2012,32(5):12-16. |
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| Authors: | Zhao Junxiang Jiang Wali Guo Hui Yu Shen’e |
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| Institution: | Zhao Junxiang1,2),Jiang Wali1),Guo Hui1) and Yu Shen’e1) 1)Key Laboratory of Crustal Dynamics,Institute of Crustal Dynamics,CEA,Beijing 1000852)School of Earth Sciences and Resources,China University of Geosciences,Beijing 100089 |
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| Abstract: | We use simplified multiple aliquot regenerative dose(SMAR) protocol from fine grain quartz(4～11μm) to systematically date samples from Sunjialou trench across Tangshan earthquake zone in 1976. OSL signals of these samples dominated by fast component show that they are suitable for OSL dating. On the basis of the optical ages and the burial depth of samples, the age depth curve and function of the trench are obtained. Through it we inferred depositional rate. The results suggest that depositional rate curves on both sides of the fault show two parallels between 50 and 7.16 ka, which indicates sedimentary environment are stable and no tectonic movement happened during that time interval. The depositional rate is about 0.03 m/ka and 0.6 meters distance in the range of two parallels is vertical offsets generated by the 1976 Tangshan earthquake. Activity caused by the main fault in about 50 ka leads to depositional rate increase, which is 0.1 m/ka. Coeval activity in the secondary faults causes depositional rate in western segment about twice that of eastern segment, which is 0.2 m/ka. In conclusion, tectonic movement is main factor for depositional rate change in study area but climate change. The depositional rate change may be useful approaches for the palaeoseismic events. |
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| Keywords: | Tangshan Sunjialou trench OSL depositional rate tectonic movement |
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