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Influence of mantle convection to the crustal movement pattern in the northeastern margin of the Tibetan Plateau based on numerical simulation

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Science China Earth Sciences 2018年第11期61卷 1644-1658页

作者： Aiyu ZHU Dongning ZHANG Tao ZHU Yingxing GUO Institute of Geophysics China Earthquake Administration Key Laboratory of Seismic Observation and Geophysical Imaging Institute of GeophysicsChina Earthquake Administration

Based on the recent observations about the movement and rheological structure of the lithosphere and deformation pattern of the crust, we developed a three-dimensional finite element model for the northeastern margin of the Tibetan *** model considered the impacts of both external and internal conditions, including mantle convection, gravitational potential energy and block interactions. We compared the simulated surface movement rates to the observed GPS velocities, and the results revealed that crustal movement gradually decreased toward the edge of the plateau. The factors controlling this pattern are the interactions of adjacent blocks, gravitational potential energy of the plateau, and also mantle convection as well. Additionally,according to the observation that there was an apparent difference between the horizontal movement rate of the lithosphere and convective velocity of the underlying mantle, and also based on the results of seismic anisotropy studies that suggest different strengths and deformation regimes of the lithosphere in different tectonic blocks, we proposed that the impact of mantle convection on the lithosphere may have varied in space, and introduced a parameter named mantle convection intensity factor in numerical simulations. Our simulation results show consistent surface movement rates with GPS observations, which further supports the viewpoint of seismic anisotropy studies, i.e., the degree of coupling between the crust and mantle varies significantly among different blocks.

关键词： Northeastern margin of the Tibetan Plateau crustal movement Mantle convection Numerical simulation

Characteristics of horizontal crustal movement in Weihe basin and adjacent zones by GPS observation

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Acta Seismologica Sinica(English Edition) 2004年第3期17卷 282-286页

作者：戴王强任隽赵小茂邵辉成朱桂芝 Seismological Institute of Lanzhou Lanzhou 730000China Earthquake Administration of Shaanxi Province Xian 710068China Second Center For crustal Deformation Monitoring China Earthquake AdministrationXian 710054China

Based on the GPS data provided by CMONOC during 1999~2002 and observed by Seismological Bureau of Shaanxi Province during 2001~2002, we have obtained the crustal movement velocity field in Weihe basin and adjacent regions. The results show that the motion velocity in Weihe basin and adjacent zones is characterized by distinct NE-directional stripped variation. The south border of Ordos block seems to show an discontinuous anti-clockwise rotation on the whole with an average velocity of about 5.7 mma-1 relative to Yulin site on the Ordos block. There is a left-lateral shear belt on both sides of Binxian-Xi'an-Lantian zone in the central Weihe basin, and its northern area has a better corresponding relationship with the dense zone of small earthquakes in Tong-chuan-Jingyang-Lintong-Weinan.

关键词： south border of Ordos block Weihe basin crustal movement GPS observation

General characteristics of the recent horizontal crustal movement in Chinese mainland

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Acta Seismologica Sinica(English Edition) 2001年第4期14卷 384-393页

作者：顾国华申旭辉王敏郑贵明方颖李鹏 Center for Analysis and Prediction China Seismological Bureau First crustal Deformation Monitoring Center China Seismological Bureau

In this paper, the horizontal crustal movement obtained from GPS observations in 1998 and 2000 at basic and fiducial stations in the crustal movement Observation Network of China (CMONOC) is introduced. A brief introduction of the field observations, the data processing with GAMIT/GLOBK software and the accuracy of the GPS observations is given. In average the accuracy of the results for each year is about 2 mm in the horizontal components and 5 mm in the vertical component, and the average accuracy of horizontal displacements at a station is about 3 mm. The results of crustal movement during the period from early September 1998 to mid June, 2000, including the displacements at each station with datum definition of a group of stable stations of insignificant relative movements among themselves in the eastern part of China, strains in different parts of the network and rotations in some parts, are obtained. Based on the crustal movement maps which are more complete and detailed than previous ones, the general characteristics of the recent crustal movement in Chinese mainland are discussed. During the above mentioned period of observations, the crustal deformation in the eastern part of China was relatively small and quite stable. With reference to a group of stable stations with small relative movement in the eastern part of China, the northeastern China block moved northward for about 10 mm, the South China block moved south-eastern for about 9 mm. In reference to the eastern part the northwestern part of China moved northward for about 26 mm, the Tibetan area in southwestern part of China moved mainly northward for about 32 mm. The area in Yunnan and east Tibet showed significant clockwise tectonic rotation of 0.0045 double prime or average rotational displacement of 12 mm with the rotation center at 26.5°N and 95.5°E. The North-South Seismic Belt in the middle part of China is of active and complicated deformation. The observation results show that the northward p

关键词： crustal movement GPS displacement strain rotation

Synchronization Control for a crustal movement Simulation System Based on a Fuzzy Logic Strategy

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Synchronization Control for a Crustal Movement Simulation Sy...

crustal movement in the Northern Part of North China Associated with Zhangbei Earthquake

第36届中国控制会议

作者： Qingzeng Ma En Li Yuanqing Xia Zize Liang School of Automation Beijing Institute of Technology Institute of Automation Chinese Academy of Sciences

ISBN: (纸本)9781538629185

crustal movement is a key factor affecting water cycle and related land surface *** this paper,the principle of a class of crustal movement simulation system（CMSS） is *** CMSS proposed in this study is composed of twelve sets of four-legged parallel manipulator with three degrees of *** structure of the parallel manipulator with actuation redundancy is *** the conventional controller design for parallel manipulator,the controller for each kinematic chain usually works independently without considering motion states of other kinematic ***,the platform performance is easily deteriorated duo to the lack of coordination between these kinematic *** this paper,a synchronization error is developed based on the mechanism characteristic of multiple kinematic ***,a synchronization controller is designed using the proposed synchronization error and fuzzy logic *** our design,each kinematic chain not only tracks its own desired trajectory,but also cooperates with other kinematic ***,according to synchronization error,the synchronization controller will determine that which chain should be speeded up or slowed *** results demonstrate the performance of the proposed control scheme in terms of tracking accuracy and robustness to interferences.

关键词： crustal movement Parallel Manipulator Synchronization Control Fuzzy Logic

来源： cnki会议评论

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Earthquake Research in China 2002年第1期16卷 81-89页

作者： Yang Guohua, Wang Min, and Han YuepingFirst First crustal Deformation Monitoring Center China Seismological Bureau Tianjin 300180 China

crustal Deformation Monitoring Center, China Seismological Bureau, Tianjin 300180, China crustal deformation in the northern part of North China associated with Zhangbei earthquake is analyzed using GPS data collected during 1992, 1996 and 1999, precise re-leveling data collected during 1992, 1998 and 2000, and INSAR result (September 22, 1997～May 6, 1998). The results indicate: ① The vertical deformation is not remarkable since 1992. The vertical crustal deformation in the central and northern part of North China in recent 10 years is of inheritance. The scope of the significant deformation is 15km×15km with a magnitude of 250mm when the event occurred. ② The horizontal deformation is not remarkable in any unit of North China. ③ Before and after the event (1992～1996 and 1996～1999), there is kinematic change of horizontal motion between different units. The activity mode along Yinshan tectonic zone changed from relative static state to left-lateral strike slip; The dominant extensional movement along Shanxi rift zone changed to right-lateral strike slip; Yanshan tectonic zone changed from left-lateral strike-slip with extension to left-lateral strike slip; Yanshan-Hebei transitional zone formed before the event disappeared after the event. ④ The scale of the deformation is closely related to the physical property of media and geological structure environment. Further analysis indicates that ① Zhangbei earthquake does not mean that the earthquake activity begins to be strengthened in North China; ② The crustal movement is normal at present; ③ Next stronger earthquake in North China might be located in Yanshan tectonic zone, especially at its both ends, and Shanxi tectonic zone.

关键词： Northern part of North China GPS INSAR crustal movement Zhangbei earthquake Trend of earthquake activity

Horizontal crustal movement in Chinese mainland before and after the great Kunlun Mountain M=8.1 earthquake in 2001

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Acta Seismologica Sinica(English Edition) 2003年第6期16卷 676-685页

作者：顾国华张晶王武星 Center for Analysis and Prediction China Seismological Bureau Beijing 100036 China

The continuous GPS observation at the fiducial stations in the crustal movement Observation Network of China (CMONOC) recorded the crustal movement of Chinese mainland before and after the great Kunlun Mountain earthquake of M=8.1 on November 14, 2001, especially the horizontal crustal movement in the western part of China. Based on the datum defined by a group of stable stations with small mutual horizontal displacements for a few years, the time series of horizontal displacements at fiducial stations were obtained. Significant anomalous horizontal displacements had appeared at the fiducial stations in the western part of China since early November 2000 and several earthquakes with the magnitudes about 6.0 had occurred in Yunnan and Sichuan Provinces. The northward components of the horizontal displacement at the fiducial stations in west China had decreased signifi-cantly and even changed in the opposite sense since mid April 2001. After the earthquake, the northward dis-placements still decreased and there were significant westward displacements. The process of the crustal move-ment in the western part of Chinese mainland (in reference to east China) suggests that the main force source for this earthquake came from the northward pushing of the Indian plate. The great earthquake released a large amount of energy, as a result, the action applied by the Indian plate to Chinese mainland diminished significantly and after the great earthquake, the seismic activity in Chinese mainland decreased considerably until the end of 2002.

关键词： crustal movement GPS earthquake prediction great Kunlun Mountain earthquake of M=8.1 time series

Horizontal crustal movement in Chinese mainland from 1999 to 2001

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Acta Seismologica Sinica(English Edition) 2004年第Z1期17卷 52-60页

作者： GU Guo-hua(顾国华) FU Yang(符养) WANG Wu-xing(王武星) Institute of Earthquake Science China Earthquake Administration Beijing 100036 China Xi''an Institute of Surveying and Mapping Xi''an 710054 China

The paper introduces the horizontal crustal movement obtained from GPS observations in the regional networks (including the basic network and the fiducial network) of the crustal movement Observation Network of China (CMONOC) carried out in 1999 and 2001. This paper is characterized by the acquisition of the horizontal dis- placement velocities during the period from 1999 to 2001 at the observation stations in the regional networks with datum definition of a group of stable stations with small mutual displacements in east China. Based on the most detailed map of horizontal crustal movement in Chinese mainland, the division of blocks, their displacements and deformations are studied. An approach to analysis of the intensity of the horizontal crustal deformation is proposed. The general characteristics of the recent horizontal crustal movement in Chinese mainland and that before the Kunlunshan earthquake of M=8.1 on November 14, 2001 are analyzed.

关键词： crustal movement GPS displacement block regional network

Multi-quadric Equations Interpolation and Its Applications to the Establishment of crustal movement Speed Field

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Geo-Spatial Information Science 2002年第2期5卷 1-5页

作者： YAO Yibin LIU Jingnan SHI Chuang TAO Benzao School of Geodesy and Geomatics Wuhan University Wuhan China

In this paper,multi_quadric equations interpolation is used to establish a widely covered and valuable speed field model,with which the crustal movement image is obtained.

关键词： multi_quadric equations interpolation speed field model crustal movement pattern

Global crustal movement and tectonic plate boundary deformation constrained by the ITRF2008

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Geodesy and Geodynamics 2012年第3期3卷 40-45页

作者： Zhu Ze Meng Guojie Su Xiaoning Wu Jicang Li Jean Xiaojing CEA Key Laboratory of Earthquake Prediction( Institute of Earthquake Science China Earthquake Administration Beijing 100036 China Tongji University Shanghai 200092 China University of New South Wales Sydney NSW 2052 Australia

On the basis of the newly released International Terrestrial Reference Frame（ITRF2008） by the International Earth Rotation Service （IERS）, a new global plate model ITRF2008 plate for the major plates is established. This ITRF2008-derived model is analyzed in comparison with NNR-NUVEL1A model, which is mainly based on geological and geophysical data. The Eurasia and Paeifi6 plates display obvious differences in terms of the velocity fields derived from the two plate motion models. Plate acceleration is also introduced to characterize the differences of the two velocity fields which obtained from ITRF2008-plate and NNR-NUVEL1A models for major individual plates. The results show that the Africa, South America and Eurasia plates are undergoing acceleration, while the North America and Australia plates are in the state of deceleration motion

关键词： ITRF2008 crustal movement global plate model plate acceleration