海洋负荷潮汐对测站位移影响的理论研究   总被引：2，自引：1，他引：1  

张捍卫  郑勇  赵方泉 《大地测量与地球动力学》2003,23(1):69-73

测站位移的海潮效应可以看作是一种负荷影响。海潮负荷对测站位移的影响在某些台站（例如大洋中的岛屿以及沿海岩地区）可达几厘米，因此空间大地测量技术中必须以改正。研究了海洋负荷潮汐对测站位移影响的理论和方法，在推导过程中回避了将点负荷密度展开为球谐函数，而是直接以负荷引力位为基础，并将海潮潮高引入表达式中，推导出了海潮对测站位移影响的有关公式，同时探讨了在毫米级精度时需要注意的一些问题，为空间大地测量学的理论研究提供参考和依据。  相似文献   

含锡自然铜研究     

徐泽仙  张润吉  刘振云  盛兴土 《岩石矿物学杂志》1987,6(4):351-356

本文对发现于河南毛堂金矿田氧化矿石中的含锡自然铜进行了矿物学研究。该矿物属等轴晶系,O_h~5-F_(m3m),a_0=3.655?,Z=4。化学成分中Cu 90.38(wt)%,Sn 9.38(wt)%,分子式Cu_(18)Sn。含锡自然铜相当于Cu_(18)Sn合金中的a相,在自然界属首次发现。  相似文献   

IMMIGRATION, GEOGRAPHIC DISTRIBUTION AND SOCIAL ECONOMIC STATUS OF AMERICAN CHINESE     

Zhang Zhenyu Henan Institute of Geography  Zhengzhou  P.R.ChinaWang Jue The University of Kansas  Lawrence  USA 《地理学报(英文版)》1997,(1)

ＣｈｉｎｅｓｅｉｓｏｎｅｏｆｔｈｅｓｍａｌｌｅｓｔｍｉｎｏｔｉｔｉｅｓｉｎｔｈｅＵｎｉｔｅｄＳｔａｔｅｓ,ｗｈｉｃｈｃｏｎｓｔｉｔｕｔｅｓｏｎｌｙ1ｐｅｒｃｅｎｔｏｆｔｈｅｔｏｔａｌｐｏｐｕｌａｔｉｏｎ.Ｉｎｔｈｅｐａｓｔｙｅａｒｓ,ＡｍｅｒｉｃａｎＣｈｉｎｅｓｅｈａｖｅｍａｄｅｇｒｅａｔｃｏｎｔｒｉｂｕｔｉｏｎｓｔｏｔｈｅｄｅｖｅｌｏｐｍｅｎｔｏｆｔｈｅＵｎｉｔｅｄＳｔａｔｅｓ.Ｂｕｔｉｎｔｈｅｅａｒｌｙｙｅａｒｓ,ｔｈｅｙｗｅｒｅｕｎｆａｉｒｌｙｔｒｅａｔｅｄａｎｄｔｈｅｉｒｈｉｓｔｏｒｙｗａｓｉ…  相似文献   

Study on shallow structural features Changbaishan Tianchi volcanic region     

潘纪顺顾梦林  赵成斌潘素珍 《地震学报(英文版)》2006,19(4):428-437

A seismic survey by 10 shallow profiles and 6 ultra-shallow profiles was performed in Changbaishan Tianchi volcanic region in 2002. The result shows that there are three （in some areas as many as seven） stable interfaces in the survey region, but no reflection phases are found in depths greater than 500 m. The number of interfaces in the southwestern part is obviously greater than in the northwestern part of Tianchi volcano, which suggests that the faults in the southwest have a stronger controlling power over the flow direction of volcano-spewed lava as compared with those in the northwest. Six shallow faults exist in the survey region. The shallow faults are nearly vertical graben-like faults and are mostly distributed on the southwest of Tianchi crater, indicating that volcanic activities in the southwest are stronger than in the northwest. On this ground, it could be further deduced that the NE-trending major fault of Tianchi volcano （ the Liudaogou-Tianchi-Zengfengshan fault） is more active than the NW-trending Baishanzhen-Tianchi-Jince fault.  相似文献   

亚洲地震委员会第四次学术大会于2002年11月在尼泊尔加德满都举行     

朱传镇  吴忠良  易桂喜  王夫运  郑重  赵凤新 《国际地震动态》2003,(1):18-21

亚洲地震委员会（ASC）第四次学术大会暨地震学、地震危险性评估和地震风险管理学术讨论会于2002年11月24－26日在尼泊尔加德满都举行。来自亚洲、大洋洲、美洲和欧洲的22个国家的近200名专家出席了会议，会议共收到约110篇研究报告。文章介绍了大会、学术交流和ASC工作会议等情况。  相似文献   

郑州和永城地区地基土的物理力学性质比较分析     

张秋英周兴华  朱会强 《中国煤田地质》2004,16(6):27-28,70

利用数理统计方法，对河南省郑州地区和永城地区地基土的物理力学性质进行了比较分析，找出它们的联系与差异，其各类土的各种特性指标基本正确反映了两个地区沉积差异情况下的工程特性，对郑州地区和永城地区岩土工程勘察、设计、施工有一定的参考价值。  相似文献   

The Crust-mantle Structure and Seismic Risk in Tangyin Graben and Its Adjacent Area   总被引：4，自引：0，他引：4  

Ren Qingfang  Zhang Xiankang  Zhang Chengke  Zhao Jinren  and Zhou Xuesong Research Center of Exploration Geophysics  CSB  Zhengzhou  China 《中国地震研究》1998,(4)

1-D and 2-D calculation and interpretation are carried out with the DSS data from the western section of Heze-Changzhi profile and the southern section of Zhengzhou-Jinan profile. 2-D velocity structure is determined in Tangyin graben and its adjacent area. The result shows that velocity structure of the crust and upper mantle is obviously different in vertical and lateral directions. Crustal thickness varies apparently in this area, and there are local low velocity blocks in the interior crust. The swelling M-discontinuity corresponds to Tangyin graben and Moho depth at the highest swelling position is 31 km. Toward the east, its depth gradually increases to 32 km in Xunxian swelling; toward the west, M-discontinuity becomes a steep zone at the piedmont uplift of Taihang Mountain and reaches 40 km at depth near Changzhi. Through analyzing the relationship between historical earthquakes and deep structure in North China, we infer that seismic risk exists in Tangyin graben and its adjacent area.  相似文献   

The movement age of hidden fault and analysis on width of its effect zone from shallow seismic sounding and drilling data     

杨晓平  李德庆  赵成斌  刘保金  孙振国  赵景尧 《地震学报(英文版)》2004,17(Z1)

Introduction Artificial seismic sounding is a geophysical exploration technique developed in prospectingfor oil and gas and other mineral resources and consists of reflection wave and refraction waveexploration methods. With rapid development of computer techniques and sounding instruments,the reflection wave method became a high-resolution imagery technique for underground struc-tures and is widespreadly used in detection of underground caves and in engineering exploration.In previous se…  相似文献   

东秦岭古生代古生物区与古地理变迁   总被引：2，自引：0，他引：2  

王建平  裴放 《地质论评》2002,48(6):603-611

本文根据对东秦岭古生代各纪古生物区的分析，指出在北美岭褶皱带，二郎坪海槽寒武纪放射虫和微浮游植物属华南区，奥陶纪头足类，腹足类、珊瑚为华北区，早志留世珊瑚为华南区，柿树园海槽中泥盆世至二叠纪孢子主要见于华南区，干江河海槽泥盆纪珊瑚，海百合为华南区。在南秦岭褶皱带，浙川陆棚寒武纪三叶虫有华北区和华南区的分子，奥陶纪牙形石、头足类由华南区变为华北区，晚奥陶世腕足类、三叶虫、珊瑚为华北区，而早志留世笔石，晚泥盆世珊瑚，腕足类和Ting、古植物以及早石炭世珊瑚和Ting均为华南区，南湾海槽泥盆纪孢子为华南区。在此基础上探讨了东秦岭古生代古地理变迁过程。  相似文献   

基于ORACLE数据库的遥感影像存储技术     

王连备  吴云东 《测绘学院学报》2002,19(4):258-261

遥感影像的存储与管理是当前急待解决的问题。文中基于ORACLE数据库中典型数据类型的分析，提出并实现了遥感影像存储的3种不同途径和方法。  相似文献