Evolution of 3D tectonic stress field and fault movement in North China   总被引：2，自引：0，他引：2  

陈连旺  陆远忠  郭若眉  许桂林  张杰 《地震学报(英文版)》2001,14(4):371-383

IntroductionThe research on stress field interior the Earth is an either relative old or young branch of geoscience. Early in the 20th century, in order to learn the state of inner stress field, a few scholars had used simple ideal model to analyze big scale tectonic conformations and activities according to tide, gravity, rotation and inner thermal materials. So far, lots of problems on the state of the Earth stress field have not been solved completely yet. The origin of stress field, the d…  相似文献   

General characteristics of the recent horizontal crustal movement in Chinese mainland   总被引：5，自引：0，他引：5  

顾国华  申旭辉  王敏  郑贵明  方颖  李鹏 《地震学报(英文版)》2001,14(4):384-393

1 Introduction of GPS observation dataThe Crustal Movement Observation Network of China (CMONOC) is a major scientific project in China organized by China Seismological Bureau and paticipated by the Bureau of Surveying and Mapping of the General Staff, the Chinese Academy of Sciences and the National Bureau of Surveying and Mapping. Based on the observation data of 25 fiducial stations and 56 basic stations in CMONOC (Figure 1 and Table 1), collected from August 26 to September…  相似文献   

Sinistral Strike-slip Movement Along Western Terminal Segment of the Active Daqingshan Piedmont Fault, Inner Mongolia, China     

Jiang Wali  Xiao Zhenmin  Wang Huanzhen 《中国地震研究》2001,15(1):15-24

There are 18 gullies displaying sinistral contortions to different degrees along the western terminal segment about 10 km long of the active Daqingshan piedmont fault near the Donghe District, Baotou City. The contortion amount of gullies ranges from 20 m to 300 m. The contortion and length of the gullies are in direct proportion. The relation between piedmont terraces and gullies indicates that the gullies with upper reaches of about 1 ～ 5 km long and those smaller than one kilometer were formed at the end of Late Pleistocene and Holocene.Meanwhile, sandy gravel layer of alluvial-proluvial sediment on the upthrown wall is directly in contact with yellow clayey sand of the downthrown wall. During the Holocene, the sinistral strike-slip rate along the western terminal segment of the active Daqingshan piedmont fault reached 5 mm/a from age data of dislocated sediments. The evolutional mechanism of the active Daqingshan piedmont fault is also discussed in the paper.  相似文献   

Pull-apart Basins and the Total Lateral Displacement Along the Haiyuan Fault Zone in Cenozoic   总被引：2，自引：0，他引：2  

Tian Qinjian  Ding Guoyu  Shen Xuhui 《中国地震研究》2001,15(4):390-398

ＩＮＴＲＯＤＵＣＴＩＯＮＩｔｉｓｄｅｂａｔｅｄａｂｏｕｔｔｈｅｔｏｔａｌｌａｔｅｒａｌｄｉｓｐｌａｃｅｍｅｎｔａｌｏｎｇｔｈｅｍａｉｎｂｏｕｎｄａｒｙｆａｕｌｔｓｏｆｉｎｔｒａｐｌａｔｅｂｌｏｃｋｓｉｎｅａｓｔｅｒｎＡｓｉａｃｏｎｔｉｎｅｎｔｉｎＣｅｎｏｚｏｉｃｅｒａ .Ｉｎｔｈｅ 1 970ｓｏｆ2 0ｔｈｃｅｎｔｕｒｙ ,ｓｏｍｅｓｃｉｅｎｔｉｓｔｓｈａｄｅｓ ｔｉｍａｔｅｄｌａｔｅｒａｌｄｉｓｐｌａｃｅｍｅｎｔｂａｓｅｄｏｎｇｅｏｍｏｒｐｈｉｃｄａｔａ .Ｔｈｅｙｐｒｏｐｏｓｅｄｔｈａｔｔｈｅｔｏｔａｌｄ…  相似文献   

砂土液化诱发地面侧移分析   总被引：2，自引：0，他引：2  

景立平  李玉亭 《东北地震研究》1996,12(4):40-49

分析了砂土液化诱发地面侧移的机理，提出了估计砂土液化诱发地面侧颓废不久位一种新方法。该方法是用饱和砂层中水压力的发展，在每个应力循环内对土壤的抗剪强度进行修正，然后在每个应力循环内应用Ｎｅｗｍａｒｋ刚性愉模型计算地面侧向永久位移，对比计算表明，本文提出的方法在物理机制上更加合理，计算结果与宏观震害现象十分吻合。  相似文献   

青藏高原南缘现今地球动力学研究   总被引：3，自引：1，他引：3       下载免费PDF全文

高名修 《地震地质》1996,18(2):143-155

喜马拉雅构造带于新生代时期经历了两代受力条件截然不同的形变。早期造山挤压形变与造山后的引张形变、青藏高原和高喜马拉雅的大幅度抬升。大致低喜马拉雅范围即青藏高原南缘，现今构造活动与青藏高原和高喜马拉雅块断抬升相辅相成。流行的板块聚合动力学模式，即使早新生代发生过，晚新生代以来已经灯熄。东亚大陆现代形变与地震活动的驱动力不可能源于青藏高原南缘被动挤压，而是取决于与高原隆起相关的深部主动动力学过程  相似文献   

Geometrical　textures　of　faults，evolution　of　physical　field　and　instability　characteristics   总被引：9，自引：0，他引：9  

马瑾  马胜利  刘力强  邓志辉  马文涛  刘天昌 《地震学报(英文版)》1996,9(2):261-269

Ｇｅｏｍｅｔｒｉｃａｌｔｅｘｔｕｒｅｓｏｆｆａｕｌｔｓ，ｅｖｏｌｕｔｉｏｎｏｆｐｈｙｓｉｃａｌｆｉｅｌｄａｎｄｉｎｓｔａｂｉｌｉｔｙｃｈａｒａｃｔｅｒｉｓｔｉｃｓＪＩＮＭＡ（马瑾），ＳＨＥＮＧ－ＬＩＭＡ（马胜利），ＬＩ－ＱＩＡＮＧＬＩＵ（刘力强），Ｚ...  相似文献   

Morphological characteristics of the earthquake surface ruptures on Awaji Island, associated with the 1995 Southern Hyogo Prefecture Earthquake   总被引：1，自引：0，他引：1  

Aiming  Ian Shinichi  Uda 《Island Arc》1996,5(1):1-15

Abstract The earthquake surface ruptures on the northern side of Awaji Island accompanying the 1995 Southern Hyogo Prefecture Earthquake in Japan consist of three earthquake surface rupture zones called the Nojima, Matsuho, and Kusumoto Earthquake Surface Rupture Zones. The Nojima Earthquake Surface Rupture Zone is - 18 km long and was formed from Awaji-cho at the northern end of Awaji Island to Ichinomiya-cho. It occurred along the pre-existing Nojima geological fault in the northern segment and as a new fault in the southern segment. The northern segment of the Nojima Earthquake Surface Rupture Zone is composed of some subparallel shear faults showing a right-step en echelon form and many extensional cracks showing a left-step en echelon form. The southern segment consists of some discontinuous surface ruptures which are concentrated in a narrow zone a few tens of meters in width. This surface rupture zone shows a general trend striking north 30°-60° east, and dipping 75°-85° east. The deformational topographies and striations on the fault plane generated during the co-seismic displacement show that the Nojima Earthquake Surface Rupture Zone is a right-lateral strike-slip fault with some reverse component. Displacements measured at many of the outcrops are generally 100-200 em horizontally and 50-100 em vertically in the northern segment and a few em to 20 em both horizontally and vertically in the southern segment. The largest displacements are 180 em horizontally, 130 em vertically, and 215 em in netslip measured at the Hirabayashi fault scarp. The Matsuho Earthquake Surface Rupture Zone striking north 40°-60° west was also found along the coastline trending northwest-southeast in Awaji-cho for ～1 km at the northern end of Awaji Island. The Kusumoto Earthquake Surface Rupture Zone occurred along the pre-existing Kusumoto geological fault for ～ 1.5 km near the northeastern coastline, generally striking north 35°-60° east, dipping 60°-70° west. From the morphological and geomorphological characteristics, the Nojima Earthquake Surface Rupture Zone can be divided into four segments which form a right-step en echelon formation. The geological and geomorphological evidence and the aftershock epicenter distributions show clearly that the distributions and geometry of these four segments are controlled by the pre-existing geological structures.  相似文献   

Deterministic sliding block methods for estimating seismic displacements of earth structures   总被引：5，自引：0，他引：5  

Z. Cai  R.J. Bathurst 《Soil Dynamics and Earthquake Engineering》1996,15(4):255-268

A review and quantitative comparison of existing deterministic sliding block methods for predicting permanent displacements of earth structures subjected to seismic loading is presented. The reviewed sliding block methods are divided into two main groups based on the characteristic earthquake parameters referenced in each method. One group uses the maximum horizontal ground acceleration and velocity, and the other uses the maximum horizontal ground acceleration and the predominant period of the acceleration spectrum. Displacement functions published by previous authors are reformulated to give common non-dimensionalized displacement functions of the critical acceleration ratio which are then used to compare the different methods for the estimate of permanent seismic displacement of soil structures. The results show that despite the fact that the different methods were formulated using a wide range of earthquake records and different characteristic seismic parameters, permanent displacement values predicted using these methods fall within a reasonably narrow band. Selected acceleration data from three recent earthquakes that occurred in California are used to evaluate and compare the accuracy of the reviewed displacement methods for practical applications.  相似文献   

地球自转引起大陆板块向赤道漂移的动力     

金明德 《地理学报》1996,51(2):142-146

本文从力学原理出发，讨论了由于地球自转，大陆板块受到一个沿纬圈指向东的主矩和指向赤道的主矢作用，致使板块向赤道作俯冲运动。  相似文献