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

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Earthquake Research in china 2001年第1期15卷 15-24页

作者： Jiang Wali, Xiao Zhenmin and Wang HuanzhenInstitute of crustal Dynamics, CSB, Beijing 100085, china Institute of crustal Dynamics CSB Beijing 100085 China

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 2. 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 ***, 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.

关键词： Sinistral strike-slip Holocene Daqingshan active piedmont fault

A Study of the crustal Stability in the Yangtze Three Gorges Area

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工程科学（英文版） 2003年第1期1卷 23-31,56页

作者： Li Ping 1, Li Yuanjun 2.(1 Institute of Geology, china Seismological Bureau, Beijing 10002.) (2.College of Civil Construction Engineering, Wuhan University, Wuhan 4.0072.

The Three Gorges Dam on the Yangtze River is situated on the intact rock mass composed of diorite granite at the southern termination of the Huangling block which, as a sub plate with a double layer structure (crystalline basement and sedimentary cover) in the Chinese inland, keeps a constant but slow uplift as a whole since its formation in the Indoncisia movement. Tectonic deformation within the block is not significant, with the exception of a slight southeastward tilt. The block is confined by many active structures, of which the sub longitudinal Yuanan and Xiannvshan ( Mount Fairy ) deep fault zones are the main strongly seismogenic zones. The Yuan’an fault zone represents a regional boundary among West Henan, West Hubei and West Hunan mountainous regions as well as the Nanyang, Jianghan and Dongting Lake basins, with a total length of more than 1,000 km. Two M 6 5 earthquakes (in Changde and Nanyang) occurred in the fault zone in historic time and the distance between the two epicenters is about 500 km. The Mount Fairy fault zone extends northward along the Xiangxi River and ends at the Qingfeng fault. It runs a total length of more than 2.0 km. southward across Yuyang Pass and then its trace is unknown. The fault zone has a tectonic condition for occurrences of M 6.0 earthquakes. The possible seismic risk for the dam may come from these two strong seismogenic zones. Thus the seismic intensity to influence the dam is estimated to be Ⅵ～Ⅶ and the horizontal peak acceleration to be 0 1～0 15 g.

关键词： Three Gorges Dam on the Yangtze Huangling block strong seismogenic zone crustal stability

THE UPWARPING AND DOWNWARPING STRUCTURAL SYSTEM OF MOHO—SURFACE IN CHINESE AND NEAR REGION AND THE GENETIC MECHANICS OF QINGHAI—TIBET PLATEAU TECTONIC

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地学前缘 2000年第S1期7卷 366-367页

作者： Zhang Jingfa,Tang Rongyu,Chen Xuebo,Wang Enfu,Li Jingshen[WT5,5”BX] (Institute of crustal Stress,SSB,Beijing 100085,china)

Recently, this study group established “the map of MOHO\|surface bathymetric line in Chinese and Near Region" on the basis of latest survey and study of the crustal depth, the preliminary result shows that the regular meridional and latitudinal upwarping and downwarping structural pattern of MOHO\|surface bathymetric line among Eurasian plate and Pacific plate and the Indian plate alternately appears, and which is accreted and coupled with basin ridge structure that exist shallow crustal base, continental crust and oceanic crust and others regular upwarping and downwarping net structure system that possessing different block characters and different scales exist together. Among different structure systems, it occurs that ramp downwarping impetus transform structure belts whose trends is characteristic. Nowadays upwarping and downwarping net structure system is basically modeled in Himalayan orogeny period. It is showed that the Earth revolution way has been changed in this period, which leaded to a new Earth dynamics *** pattern of upwarping and downwarping structure among different structure systems or different structure blocks , and the characters of different trends and different scale transform structure belts, reflects the structure {2. way and their conversion law, and reveals the Earth centralized dynamics mechanics that is produced by the revolutionary effect under the environments of aster system. This can be clearly reflected by the change of impetus way between Qinghai—Tibet highland structure system and near structure system.

关键词： Moho\|surface structural system genetic mechanics tectonic Qin ghai—Tibet

Macro-Analysis on Across-Fault crustal Deformation Measurement Data Along the Northern Edge of the Qinghai-Xizang Block

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Earthquake Research in china 1997年第2期11卷 35-43页

作者： Zhao Zhencai and Chen BingThe Second crustal Deformation Monitoring Center,SSB,Xi’an 710054.china

Based on the arrangement of the across-fault measurement data along the northern edge of the Qinghai-Xizang block,we divide the deformation into different types and probe the nature of various fault movements based on these *** recent situation of tectonic movement of main structural belts and seismicity in this area are *** the above,it is concluded that across-fault measurement can reflect not only the conditions of fault movement nearby but also the change of regional stress fields; not only is this a method to obtain regional seismogenic information and to conduct short-term prediction but it is also involved with large scale space-time prediction of moderate and strong earthquakes on the basis of the macro characteristics of fractures.

关键词： Macro-Analysis on Across-Fault crustal Deformation Measurement Data Along the Northern Edge of the Qinghai-Xizang Block Edge

基于单台加速度记录的混合全局优化HVSR反演场地浅层速度结构

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地球物理学报 2018年第3期61卷 938-947页

作者：荣棉水符力耘李小军中国地震局地壳应力研究所北京100085 中国科学院地质与地球物理研究所北京100029 中国地震局地球物理研究所北京100081

利用水平与竖向谱比(HVSR)方法反演场地速度结构是国际上迅速发展的研究领域.HVSR反演计算实质是一个土层场地模型空间搜索的全局优化问题,当模型搜索空间的复杂程度增大时,目前常用的搜索算法收敛速度慢,计算效率较低.本文实现了一种... 详细信息

利用水平与竖向谱比(HVSR)方法反演场地速度结构是国际上迅速发展的研究领域.HVSR反演计算实质是一个土层场地模型空间搜索的全局优化问题,当模型搜索空间的复杂程度增大时,目前常用的搜索算法收敛速度慢,计算效率较低.本文实现了一种结合遗传和模拟退火方法优点的混合全局优化HVSR反演算法,通过理论模型和竖向台阵实测数据的检验,表明该算法能获得很好的反演效果,较好地解决了蒙特卡罗方法收敛速度慢,遗传算法收敛早熟和模拟退火算法搜索效率低的问题.本文在此基础上讨论了单台加速度S波记录用于场地速度结构HVSR反演的适用性,为基于单个地震台的地震观测记录反演浅层速度结构提供了一种高效且较为准确的反演方法.

关键词：水平与竖向谱比(HVSR) 遗传算法模拟退火算法混合全局优化算法浅层速度结构反演

面波频散与接收函数联合反演南北地震带北段壳幔速度结构

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地球物理学报 2018年第4期61卷 1211-1224页

作者：郑晨丁志峰宋晓东中国地震局地球物理研究所北京100081 中国地震局地震观测与地球物理成像重点实验室北京100081 Department of Geology University of Illinois at Urbana-ChampaignIL 61820USA 武汉大学测绘学院武汉430079

通过对南北地震带北段区域所布设的676个流动地震台站观测资料进行处理,联合反演面波频散与接收函数数据,获得了研究区内地壳厚度、沉积层厚度的分布情况以及地壳上地幔高分辨率S波速度结构成像结果.反演结果显示研究区地壳厚度从青藏... 详细信息

通过对南北地震带北段区域所布设的676个流动地震台站观测资料进行处理,联合反演面波频散与接收函数数据,获得了研究区内地壳厚度、沉积层厚度的分布情况以及地壳上地幔高分辨率S波速度结构成像结果.反演结果显示研究区地壳厚度从青藏高原东北缘向外总体逐渐变薄,秦岭造山带地壳厚度较同属青藏高原东北缘的北祁连块体明显减薄;鄂尔多斯盆地及河套盆地分布有非常厚的沉积层,阿拉善块体部分区域也有一定沉积层分布,沉积层与研究区内盆地位置较为一致;松潘—甘孜块体、北祁连造山带等青藏高原东北缘总体表现为S波低速异常;在中下地壳,松潘—甘孜块体下方的低速体比北祁连造山带下方的低速体S波速度值更小、分布深度更浅,更有可能对应于部分熔融的地壳;鄂尔多斯盆地在中下地壳以及上地幔内有着较大范围的高速异常一直延伸到12.km以下,而河套盆地地幔只在80km以上部分有着高速异常的分布,此深度可能代表了河套盆地的岩石圈厚度,来自深部地幔的热物质上涌造成了该区域的岩石圈减薄;阿拉善块体在地壳和上地幔都表现出高低速共存的分布特征,暗示阿拉善块体西部岩石圈可能受青藏高原东北缘的挤压作用发生改造.

关键词：联合反演面波频散接收函数南北地震带青藏高原东北缘

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 Seismological Bureau, 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 52.0～6800a 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 2.60±190～4.70±150a BP, nearly 562.±150a BP, and 8083±2.0～84.0±72.a BP, respectively, and their recurrence interval is 2.13a,2.2.a and 2.71a 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

NUMERICAL SIMULATIONS OF SEA ICE WITH DIFFERENT ADVECTION SCHEMES

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Journal of Hydrodynamics 2011年第3期23卷 372-378页

作者： LIU Xi-ying State Key laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Institute of Meteorology PLA University of Science and Technology Nanjing 211101 China

Numerical simulations are carried out for sea ice with four different advection schemes to study their effects on the simulation results. The sea ice model employed here is the Sea Ice Simulator （SIS） of the Geophysical Fluid Dynamics laboratory （GFDL） Modular Ocean Model version 4. （MOM4.） and the four advection schemes are, the upwind scheme originally used in the SIS, the Multi-Dimensional Positive Advection （MDPA） scheme, the Incremental Remapping Scheme （IRS） and the Two Step Shape Preserving （TSSP） scheme. The latter three schemes are newly introduced. To consider the interactions between sea ice and ocean, a mixed layer ocean model is introduced and coupled to the SIS. The coupled model uses a tri-polar coordinate with 12.x65 grids, covering the whole earth globe, in the horizontal plane. Simulation results in the northern high latitudes are analyzed. In all simulations, the model reproduces the seasonal variation of sea ice in the northern high latitudes well. Compared with the results from the observation, the sea ice model produces some extra sea ice coverage in the Greenland Sea and Barents Sea in winter due to the exclusion of ocean current effects and the smaller simulated sea ice thickness in the Arctic basin. There are similar features among the results obtained with the introduced three advection schemes. The simulated sea ice thickness with the three newly introduced schemes are all smaller than that of the upwind scheme and the simulated sea ice velocities of {2. are all smaller than that of the upwind scheme. There are more similarities shared in the results obtained with the MPDA and TSSP schemes.

关键词： advection scheme sea ice simulation

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怀来地区多层位地温变化研究

大地测量与地球动力学 2018年第4期38卷 433-436页

作者：罗楠刘爱春张春鹏范良龙梁晨中国地质大学(北京)地球物理与信息技术学院北京市学院路29号100083 中国地震局地壳应力研究所北京市安宁庄路1号100085 中国地震局地壳动力学重点实验室北京市安宁庄路1号100085 北京市地震观测工程技术研究中心北京市安宁庄路1号100085

利用MAPSIS、MapInfo、SPSS等软件,对怀来地区不同层位2.12.2.15年的地温观测数据进行分析。根据井中东西南北4.方向的温度传感器数据,可以得到附近热水管道的大致方位,总体来说4.方向的地温变化趋势相近。不同深度的地温数据结合相... 详细信息

利用MAPSIS、MapInfo、SPSS等软件,对怀来地区不同层位2.12.2.15年的地温观测数据进行分析。根据井中东西南北4.方向的温度传感器数据,可以得到附近热水管道的大致方位,总体来说4.方向的地温变化趋势相近。不同深度的地温数据结合相关系数分析表明,探测井3.2.深度以下地层的温度基本不受天气影响,只有缓慢的年变化;5m深处的地温曲线较为平稳,考虑到经济性与方便性,最终选取5m为地温观测深度。

关键词：怀来地温相关系数