华北地区部分井孔稀有气体异常研究   总被引：2，自引：0，他引：2       下载免费PDF全文

张培仁  刘成龙  王志敏  陶京玲  杨海祥  杨竹转  孟彩菊 《地震地质》2002,24(2):215-222

介绍了近年来华北地区宝龙等 3口井稀有气体的显著异常 ,并据其特征与井孔水位动态的关系 ,对稀有气体异常的成因进行了理论分析与实验研究。结果表明 ,水位下降 10 0mm ,岩层孔隙、裂隙中的气体体积膨胀 0 0 0 90 % (气体体积百分比 ,下同 )左右。由于地下水位大幅度下降 ,岩层孔隙压力减小 ,积聚在岩层孔隙、裂隙中的气体体积膨胀溢出 ,导致井孔地下水中稀有气体含量出现异常变化。这些异常是干扰因素所致 ,不是地震异  相似文献   

SHRIMP Age and Geochemistry of the Bikou Volcanic Terrane: Implications for Neoproterozoic Tectonics on the Northern Margin of the Yangtze Craton   总被引：3，自引：0，他引：3  

A.D.HANSON  P.A.DRUSCHKE 《《地质学报》英文版》2003,77(4):479-490

The Bikou volcanic terrane is predominated by subalkaline tholeiitic lavas. Rock samples display lower initial ratios of Sr and Nd, 0.701248-0.704413 and 0.511080-0.512341 respectively. 207Pb and 208Pb are significantly enriched in the lavas. Most samples have positive εNd, which indicates that the magma was derived from EM-type mantle source, while a few samples with negative εNd indicate that there was contamination in the magma evolution. Magma differentiation is demonstrated by variations of LREE and LILE from depletion to enrichment. Additionally, normalized REE patterns and trace elements showed that lavas from the Bikou volcanic terrane have similar characteristics to those of basalts in arc settings caused by subduction and collision. Analyses showed that the Bikou volcanic terrane is a volcanic arc. New evidence proved that the Hengdan Group, north of the Bikou arc, is a turbidite terrane filling a forearc basin. Consequently, the Bikou volcanic terrane and the Hengdan turbidite terrane const  相似文献   

建立和发展圣彼得堡地下空间地质生态监测系统的基本原则     

苑惠明 《水文地质工程地质技术方法动态》2003,(4):7-7,18

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Aseismic negative dislocation model and deformation analysis of crustal horizontal movement during 1999——2001 in the northeast margin of Qinghai-Xizang block     

张希 江在森王琪  张晓亮 《地震学报(英文版)》2003,16(4):395-403

Through numerical simulation for GPS data, aseism/c negative dislocation model for crustal horizontal movement during 1999-2001 in the northeast margin of Qinghai-Xizang block is presented, combined with the spatial distri-bution of apparent strain field in this area, the characteristics of motion and deformation of active blocks and their boundary faults, together with the place and intensity of strain accumulation are analyzed. It is shown that: a) 9 active blocks appeared totally clockwise motion from eastward by north to eastward by south. Obvious sinistral strike-slip and NE-NEE relative compressive motion between the blocks separated by Qilianshan-Haiyuan fault zone was discovered; b) 20 fault segments (most of them showed compression) locked the relative motion between blocks to varying degrees, among the total, the mid-east segment of Qilianshan fault (containing the place where it meets Riyueshan-Lajishan fault) and the place where it meets Haiyuan fault and Zhuanglanghe fault, more favored accumulation of strain. Moreover, the region where Riyueshan-Lajishan fault meets north boundary of Qaidam block may have strain accumulation to some degree, c) Obtained magnitude of block velocities and locking of their boundaries were less than relevant results for observation in the period of 1993-1999.  相似文献   

综放开采地表移动变形规律实测研究   总被引：4，自引：0，他引：4  

谭志祥  邓喀中  白振明  王宗盛  孙新民 《测绘通报》2003,(9):20-22

为了研究综放开采条件下地表移动变形规律、指导矿井生产，鲍店煤矿专门在1310综放工作面上方设立地表移动观测站。通过对观测资料的分析研究，获得该区条件下综放开采时的地表移动变形规律和有关参数，为矿区“三下”采煤提供可靠的依据。  相似文献   

用于监控多移动目标的电子地图系统     

杨龙  董绪荣 《全球定位系统》2003,28(1):32-36

介绍了一种监控移动目标的电子地图系统，该系统利用独特的方法对地图文件进行组织，该方法易于程序管理和查找地图文件，并可动态添加地图文件，系统采用的串口通信方式使用方法灵活，应用简便，实际应用结果表明系统可靠，运行稳定。  相似文献   

基于移动Agent的分布式地理信息查询   总被引：8，自引：0，他引：8  

关佶红  陈晓龙  陈俊鹏  周水庚 《武汉大学学报(信息科学版)》2003,28(1):39-44

提出了基于移动Agent的分布式地理信息查询的新思路，给出了构建基于移动Agent的分布式地理信息查询系统的方法，并利用移动Agent开发平台Aglets开发了一个分布式地理信息查询原型系统，实现了分布式地理信息的透明访问。  相似文献   

利用二次曲面移动拟合法进行DEM内插的精度探讨   总被引：2，自引：0，他引：2  

蔺爱军 《测绘技术装备》2003,5(2):23-25

本文将外业实测断面作为真值，通过对外业实测断面与二次曲面移动拟合法内插出的断面做比较，结合编程实际，分析了出现内插粗差点的原因，提出了避免和剔除粗差点的方法，总结了影响该内插算法精度所涉及的各个因素。  相似文献   

面向数字城市空间管治的Mobile GIS集成研究     

周立 《现代测绘》2003,(Z1)

探讨了数字城市空间管治Mobile GIS集成的技术路线。通过城市空间管治动态信息采集、空间决策支持需求分析,设计实现了数字城市空间管治移动GIS系统。  相似文献   

The Northward Shift of Climatic Belts in China During the Last 50 Years and the Corresponding Seasonal Responses   总被引：29，自引：0，他引：29  

YE Duzheng  JIANG Yundi  DONG Wenjie 《大气科学进展》2003,20(6):959-967

Along the meridian of 105°E, the Chinese region are divided into two parts, east and west. The results show that in the east part of China the temperate extratropical belt, the warm extratropical belt,and the northern subtropical belt shift northward significantly, whereas the middle subtropical belt and the southern subtropical belt have less or no change. As for the northern subtropical belt, the maximal northward shift can reach 3.7 degrees of latitude. As for the warm extratropical belt, along the meridian of 120°-125°E, the maximal northward shift can reach 3-4 degrees. In the west part of China, each climatic belt changes little. Only in the Xinjiang area are the significant northward shifts. Correspondingly, it is found that in the last 50 years the traditional seasons have changed. For Beijing, Hailar, and Lanzhou, in general, summer becomes longer and winter shorter over the last 50 years. Summer begins early and ends late with respect to early 1950s. Contrary to the summer, winter begins la  相似文献