Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Progress In Geophysics》 2003-02
Add to Favorite Get Latest Update

The gravity responce in crust on different wavelength topography

ZHANG Chi-jun(Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China)  
In order to fruitfully and exactly exert gravity isostasy on geology, geophysics and geodesy, the relation between order(n) of spherical harmonics and Wavelength is explained, the relation between topography with its compensation and wavelength is also described, Investigating the influences of short wave topography on gravity field, the effect of compensation is not necessary regarded, otherwise it will be distorted the field effect. Model result researched shows that using topographic height to estimate gravity anomalies can obtain idea result of gravity field. For checking the exactitude of Pratt model, the density and property of a number of rocks in high Himalaya has been listed. The gravitation of a point located respectively outside circular cylinder and conic body have been calculated. It should be added that the crust is possessed of strength, and there are a numbers of topography mass located on it, if it's dimension is replaced by wave length λ, then some conclusions can be got, when the λ is larger than 1000km, the topographic mass can get regional compensation when the λ is less than 75kms, the topographic mass can's get compensation i.e., the compensation effect is almost equal to zero.
【Fund】: 中国科学院创新项目 (KZCX2-10 6)资助 .
【CateGory Index】: P312
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved