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THE CYCLE OF HOLOCENE CLIMATIC AND ENVIRONMENT-GEOLOGICAL CHANGES IN CHINA

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Scientia Geologica Sinica 1998年第1期 18-29页

作者： Bi Fuzhi and Yuan Youshen Institute of crustal dynamics, state seismological bureau,{3.

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Holocene Paleoseismic Activity Along the Northern Piedmont Fault of the Hengshan Mountain, South of Datong Basin in Shanxi Province

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Earthquake Research in China 2003年第3期17卷 206-219页

作者： Jiang Wali, xie Xinsheng, Wang Huanzhen, Feng Xiying and Zhang KangfuInstitute of crustal dynamics, China {3. {3., beijing 100085, China Institute of crustal dynamics China Seismological Bureau Beijing 100085 China

Our field investigation indicates that the northern piedmont fault of the Hengshan Mountain has dislocated proluvial fan and terrace I of the gully mouth on the northern border of the Hengshan Mountain. Stratigraphic age data indicates that the surface layer in the middle and rear part of the proluvial fan and on the terrace I of the gully mouth on the mountain border consists of sediments of about 5200～6800a B.P. The Hezhuang and Niucaoyu trenches excavated in the front of Hengshan Mountain revealed that 3.paleoseismic events have occurred along the northern piedmont fault of Hengshan Mountain since the early Holocene. The 3.paleoseismic events occurred in 2260±190～43.0±150a BP, nearly 5628±150a BP, and 8083.250～843.±720a BP, respectively, and their recurrence interval is 23.3.,2628a and 2471a on average. The coseismic vertical displacement produced by these events is 1 0～3.0m. The elapsed time of the latest movement along the fault has exceeded the recurrence interval of these paleoearthquakes. Thus, there exists the possibility of strong earthquake occurrence along the fault from now onward, so the fault is in need of observation.

关键词： Trenching Paleoearthquake Holocene Northern Hengshan piedmont fault

A Review of Catalogues of Chinese Earthquakes

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Earthquake Research in China 1996年第2期10卷 91-96页

作者： Yang Zhixian and Su GangInstitute of crustal dynamics, SSB, P.O. Box 2855, beijing 100085, China

In the past decade, the most authoritative catalogues of Chinese earthquakes and the most popular with seismologists in China are the following:(1) Gu Gongxu, 1983. Catalogue of Chinese Earthquakes;(2) Min Ziqun, 1988, Concise Catalogue of Chinese Earthquakes;(3. xie Yusuou, 1989, Catalogue of Chinese Earthquakes (M≥ 4.7) from 1900-1980 with Uniform Magnitudes; and(4) Min Ziqun, 1995, Catalogue of Chinese Historical Strong Earthquakes. Earthquakes that occurred before 1900 are mainly documented in historical *** 1950s, more recent earthquakes were documented in two major compilations of historical records finished in 1956 and 1983.1987. Separately this effort resulted in two chronicles: two volumes for the first one and five volumes for the second one. The magnitudes are converted from the maximum intensity. These magnitudes, by convention, are connected with surface wave magnitudes. However, it is clear that they do not have any strict seismological *** period of 1900-1962

关键词： Accuracy Magnitude Earthquake catalogue.

A 26ka Continuous Stratigraphic Record of Surface Rupturing Earthquakes in Drill Logs Across the Xiadian Fault,Hebei Province,China

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Earthquake Research in China 2000年第4期14卷 76-87页

作者： Xu Xiwei, Ji Fengju, Yu Guihua, Chen Wenbin, and Wang FengInstitute of Geology, CSB, beijing 100029, ChinaJiang WaliInstitute of crustal dynamics, CSB,{3., China Institute of Geology CSB Beijing 100029 China Institute of crustal dynamics CSB Beijing 100085 China

This paper deals wiah a new method for identification of long-term slip behavior of a conceaiedfault in a plain area from tectono-stratigraphic and chronological data obtained by *** determination and lithological analysis and correlation of sediments in stratigraphic colunms of drills NO.1 and No.2 at Dongliuhe Village on the hanging and foot walls ofXiadian fault allow us to quantitatively reconstruct the differential sedimentary history and vertical dislocation process on the hanging and foot walls of the fault since 26 ka BP and to set upa tectono-stratigraphic indicators for identifying *** this basis,taking theaccumulative vertical displacement of both sides of a fault to be a quantitative constraint,thestate before an abrupt dislocation in surface-rupturing earthquake can be reconstructed(de-ducting the later coseismic vertical displacement),then 11 surface-rupturing paleoseismic even-ts can be identified.A close correlation between recurrence behavior of

关键词： Paleoearthquake Drill log Stratigraphic column Surface rupture North China

基于接收函数方法研究广东地区地壳厚度与泊松比

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地震研究 2024年第2期47卷 212-222页

作者：李其栋谢卓娟应急管理部国家自然灾害防治研究院北京100085 复合链生自然灾害动力学应急管理部重点实验室北京100085

选取广东地区49个固定地震台站记录到的远震资料,采用时间域迭代反褶积法提取P波接收函数,利用Н-к叠加法获得台站下方的地壳厚度与泊松比。结果表明:①广东地区地壳厚度在24.8~3..0 km,平均值为28.3.km,自西北往东南减薄,呈区域性带... 详细信息

选取广东地区49个固定地震台站记录到的远震资料,采用时间域迭代反褶积法提取P波接收函数,利用Н-к叠加法获得台站下方的地壳厚度与泊松比。结果表明:①广东地区地壳厚度在24.8~3..0 km,平均值为28.3.km,自西北往东南减薄,呈区域性带状分布特征,可能与研究区内山脉隆起、平原和山地相间的地质构造相关。②研究区泊松比为0.220~0.287,平均值为0.244,泊松比北部偏高、南部偏低,沿海地区高于内陆地区,具有区域性块状分布特征,可能与地壳主要深大断裂切割的地质块体有关。③地壳厚度和泊松比分布与断裂的分布有较好的对应关系,并在断裂附近变化明显。④地壳厚度与泊松比呈负相关,可能与古太平洋板块在地壳演化过程中向广东大陆方向推进,幔源物质进入地壳,在地壳深部存在部分熔融,从而导致地壳岩石中镁铁成分含量上升引起的泊松比升高有关。

关键词：广东地区接收函数地壳厚度泊松比

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Discussion on rotational tectonic stress field and the genesis of circum-Ordos landmass fault system

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Acta Seismologica Sinica(English Edition) 2004年第4期17卷 464-472页

作者： xie Xin-sheng(谢新生) Institute of crustal dynamics China Earthquake Administration Beijing 100085 China

When the resultant of applied forces does not pass through the center of an active landmass, the landmass will rotate, giving rise to a rotational tectonic stress field. The motion of a fault along the principal stress plane is de-termined by the mechanic features of the plane. Tensile fractures occur on the faults in the direction of the principal extensional stress plane, and fault-depression basins will be formed under a long-term action. Thrusting and over-thrusting occur on faults in the direction of the principal compressional stress plane, or folds may be formed as a result. Information on geology shows that the North China landmass, which remained stable and intact for a long time, became disjointed in the Eogene period. In the course of disjunction, anticlockwise rotation took place in the Shanxi-Hebei-Shaanxi (Jin-Ji-Shan) landmass, giving rise to the fault-depression system in its periphery. In the Pliocene epoch the landmass lost stability and its eastern boundary moved westward. As a result, the Shanxi gra-ben system appeared and Ordos landmass was formed. Structural and mechanic features of the main faults around Jin-Ji-Shan landmass can be explained with principal stress plane of a rotational tectonic stress field.

关键词： landmass rotation rotational structure principal stress plane Jin-Ji-Shan landmass Ordos

Effect of Poisson’s ratio on stress state in the Wenchuan M_S8.0 earthquake fault

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Earthquake Science 2009年第6期22卷 603-607页

作者： Zhoumin xie Caibo Hu Yongen Cai Chi-yuen Wang Department of Geophysics Peking University Beijing 100871 China Institute of crustal dynamics China Earthquake Administration Beijing 100085 China Department of Earth and Planetary Science University of California Berkeley CA 94720 USA

The Wenchuan Ms8.0 earthquake occurred on the Longmenshan fault which inclines at a dip angle exceeding 60 degrees. Since most thrust earthquakes occur on faults with dip angles of about 3. degrees, it is enigmatic why the Wenchuan earthquake occurred on such a steep fault. In this study we use a simple finite element model to investigate how the stress state in the fault changes with the variation of Poisson＇s ratio. The results show that, with the Poisson＇s ratio in the fault increasing, the magnitudes of the principal stresses increase and the maximum Shear stress decrease, and, especially, the angle between the maximum principal stress and the fault plane decreases, which will enhance the driving force to overcome the frictional resistance on the fault. The increase of Poisson＇s ratio in the fault may be an important factor to affect the occurrence of the fault earthquakes with large angles between maximum principal stress and fault plane.

关键词： Wenchuan earthquake steep fault Poisson's ratio stress state stress rotation finite element

Surface rupture zone of the 13.3.Hongtong M=8 earthquake, Shanxi Province

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Acta Seismologica Sinica(English Edition) 2004年第4期17卷 389-397页

作者： JIANG Wa-li(江娃利) DENG Qi-dong(邓起东) XU Xi-wei(徐锡伟) xie Xin-sheng(谢新生) Institute of crustal dynamics China Earthquake Administration Beijing 100085 China Institute of Geology China Earthquake Administration Beijing 100029 China Institute of Geology China Earthquake Administration Beijing 100029 China Institute of Crustal Dynamics China Earthquake Administration Beijing 100085 China

Based on the latest displacement of Huoshan piedmont fault, Mianshan west-side fault and Taigu fault obtained from the beginning of 1990s up to the present, the characteristics of distribution and displacement of surface rup-ture zone of the 13.3.Hongtong M = 8 earthquake, Shanxi Province are synthesized and discussed in the paper. If Taigu fault, Mianshan west-side fault and Huoshan piedmont fault were contemporarily active during the 13.3.Hongtong M = 8 earthquake, the surface rupture zone would be 160 km long and could be divided into 3.segments, that is, the 50-km-long Huoshan piedmont fault segment, 3.-km-long Mianshan west-side fault segment and 70-km-long Taigu fault segment, respectively. Among them, there exist 4 km and 8 km step regions. The surface rupture zone exhibits right-lateral features. The displacements of northern and central segments are respectively 6~7 m and the southern segment has the maximum displacement of 10 m. The single basin-boundary fault of Shanxi fault-depression system usually corresponds to M 7 earthquake, while this great earthquake (M = 8) broke through the obstacle between two basins. It shows that the surface rupture scale of great earthquake is changeable.

关键词： M = 8 earthquake surface rupture zone changeability of rupture scale

Spatio-temporal variation in rock exhumation linked to large-scale shear zones in the southeastern Tibetan Plateau

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Science China Earth Sciences 2020年第4期63卷 512-532页

作者： Yukui GE Jing LIU-ZENG Jinyu ZHANG Wei WANG Yuntao TIAN Matthew FOX Lingsen ZENG Xiaoming SHEN Heng WANG Ze SU Kejia xie state Key Laboratory of Earthquake dynamics Institute of GeologyChina Earthquake AdministrationBeijing 100029China Institute of Surface-Earth System Science Tianjin UniversityTianjin 300072China Guangdong Provincial Key Laboratory of Geodynamics and Geohazards School of Earth Sciences and EngineeringSun Yat-sen UniversityGuangzhou 510275China Department of Earth Sciences University College LondonWC1E 6BTUK Key Laboratory of Deep-Earth dynamics Ministry of Natural ResourcesInstitute of GeologyChinese Academy of Geological SciencesBeijing 100037China Key Laboratory of crustal dynamics Institute of Crustal DynamicsChina Earthquake AdministrationBeijing 100085China Henan Province Non-ferrous Metals Geological Mineral Resources bureau Zhengzhou 450016.China

crustal-scale shear zones are believed to have played an important role in the tectonic and landscape evolution of orogens. However, the variation of long-term rock exhumation between the interior of shear zones and adjacent regions has not been documented in detail. In this study, we obtained new zircon U-Pb, biotite ^(40)Ar/^(3.)Ar, zircon and apatite(U-Th)/He data, and conducted inverse thermal history modeling from two age-elevation profiles(the Pianma and Tu'er profiles) in the southeastern Tibetan Plateau. Our goal is to constrain the exhumation history of the Gaoligong and Chongshan shear zones and adjacent regions, so as to explore the effect of the shear zones on exhumation and their thermal effect on cooling that should not be ignored. Our results suggest that during the interval of 18–11 Ma the exhumation rates of rocks within the Gaoligong shear zone are anomalously high compared with those outside of. The rapid cooling during 18–11 Ma appears to be restricted to the shear zone, likely due to localized thermal effects of shearing and exhumation. After 11 Ma, both the areas within and outside of the shear zones experienced a similar two-stage exhumation history: slower cooling until the early Pliocene, and then a rapid increase in cooling rate since the early Pliocene. Our results indicate a synchronized exhumation but with spatially varied exhumation rates. Our study also highlights the important role of large-scale shear zones in exposing rocks, and thus the importance of the structural context when interpreting thermochronological data in the southeastern margin of the Tibetan Plateau.

关键词： Southeastern Tibetan Plateau Exhumation (U-Th)/He Low-temperature thermochronometry Shear zone