Separate Analysis of Remote Sensing Information of Structures of Different Geological Periods and Quantitative Study of Corresponding Tectonic Stress Fields   总被引：1，自引：0，他引：1  

Yang Wunian  Zhu Zhangsen Institute of Remote Sensing  GIS  Chengdu University of Technology  Chengdu  Sichuan Liu Xinzhu  Yang Wencai 《《地质学报》英文版》1997,71(3):344-354

The structural feature shown on a remote sensing image is a synthetic result ofcombination of the deformations produced during the entire geological history of an area.Therefore, the respective tectonic stress field of each of the different stages in the complexdeformation of an area can be reconstructed in three steps: (1) geological structures formed atdifferent times are distinguished in remote sensing image interpretation; (2) structuraldeformation fields at different stages are determined by analyzing relationships betweenmicrostructures (joints and fractures) and the related structures (folds and faults); and (3)tectonic stress fields at different stages are respectively recovered through a study of the featuresof structural deformation fields in different periods. Circular structures and related circlular and radial joints are correlated in space to con-cealed structural rises. The authors propose a new method for establishing a natural model ofthe concealed structural rises and calculating the tectonic stress field by using quantitative dataof the remote sensing information of circular structures and related linear structures.  相似文献   

多能源矿产共存成藏（矿）机理和富集规律的研究——能源领域研究的新趋势     

杨建业 《中国煤田地质》2004,16(5):1-4

简要介绍了国内外有关同盆共存的多能源成藏机理、富集规律的研究现状和发展趋势。从国家能源安全和科学研究的现实需要两方面论述了我国开展多能源同盆共存的成藏饥理和富集规律研究的必要性与迫切性，并着重介绍了各种有机能源和铀之间可能存在的某种成生联系及其某种相互依存成藏关系。并指出，多种重要能源矿产共存富集、成藏（矿)及其成因联系和分布规律，已成为一个处于科学前沿、体现多学科交叉和综合的重大基础性科学问题，是今后能源学科的发展趋势和前沿研究的一个重要方向。  相似文献   

Estimation of Site Effects in Beijing City   总被引：6，自引：0，他引：6  

Z. Ding  Y. T. Chen  G. F. Panza 《Pure and Applied Geophysics》2004,161(5-6):1107-1123

— For the realistic modeling of the seismic ground motion in lateral heterogeneous anelastic media, the database of 3-D geophysical structures for Beijing City has been built up to model the seismic ground motion in the City, caused by the 1976 Tangshan and the 1998 Zhangbei earthquakes. The hybrid method, which combines the modal summation and the finite-difference algorithms, is used in the simulation. The modeling of the seismic ground motion, for both the Tangshan and the Zhangbei earthquakes, shows that the thick Quaternary sedimentary cover amplifies the peak values and increases the duration of the seismic ground motion in the northwestern part of the City. Therefore the thickness of the Quaternary sediments in Beijing City is the key factor controling the local ground effects. Four zones are defined on the base of the different thickness of the Quaternary sediments. The response spectra for each zone are computed, indicating that peak spectral values as high as 0.1 g are compatible with past seismicity and can be well exceeded if an event similar to the 1697 Sanhe-Pinggu occurs.  相似文献   

InSAR用于南极测图的可行性研究   总被引：10，自引：1，他引：10  

周春霞  鄂栋臣  廖明生 《武汉大学学报(信息科学版)》2004,29(7):619-623

利用1996年ERS-1／2tandem方式的雷达影像数据进行了生成Grove山数字高程模型的试验研究，并与实测的DEM进行比较分析，论证了利用InSAR技术进行南极测图的可行性。试验证明，在南极研究中，InSAR是一种非常有效的手段，不仅可用于地图制图，而且在冰川动力学、冰貌环境变化等研究领域也有巨大的潜力。  相似文献   

适用于大旋转角的三维基准转换的一种简便模型   总被引：33，自引：0，他引：33  

陈义  沈云中  刘大杰 《武汉大学学报(信息科学版)》2004,29(12):1101-1105

基于大角度的空间直角坐标转换，提出了以方向余弦为参数、适用于任何角度旋转的空间直角坐标转换的简明计算方法。  相似文献   

Spectral element modelling of three-dimensional wave propagation in a self-gravitating Earth with an arbitrarily stratified outer core     

Emmanuel Chaljub  Bernard Valette 《Geophysical Journal International》2004,158(1):131-141

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Iteration method to determine the eigenvalues and eigenvectors of a target multiplet including full mode coupling   总被引：2，自引：0，他引：2  

Arwen Deuss  John Woodhouse 《Geophysical Journal International》2004,159(1):326-332

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2000年以来中国大陆5级以上地震近源区的相继发震特征与预测          下载免费PDF全文

任雪梅  马禾青  陈春梅 《地震工程学报》2005,27(3):251-254

通过对中国大陆除新疆和东北深震区以外的主要地区2000年以来5级以上地震活动特征的研究发现,5级以上地震近源区的相继发震是某些区域地震活动的重要特征。依据这一特征可以对今后研究区内5级以上地震的后续地震作中期预测。  相似文献   

Research on anisotropic parameters by syn-thetic seismogram     

范小平  李清河  杨从杰 《地震学报(英文版)》2005,18(2):196-205

Introduction The anisotropy of the Earth crust medium is a common phenomenon(Crampin,1984).More and more observation materials and study results have proved that on most of the Earth′s upper crust is spread fluid-filled cracks and microcracks,which are aligned according to the contempo-rary stress-field.Such distributions of aligned cracks show effectively anisotropy to seismic wave and the phenomenon is called extensive-dilatancy anisotropy(EDA)(Crampin et al,1984).At the same time,it is …  相似文献   

Moment release in the Lower Rhine Embayment, Germany: seismological perspective of the deformation process     

J. Schmedes  S. Hainzl  S.-K. Reamer  F. Scherbaum  K.-G. Hinzen 《Geophysical Journal International》2005,160(3):901-909

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