重力局部场的分形特征及布格校正密度选取  

FRACTAL DIMENSION OF LOCAL GRAVITY FIELD AND BOUGUER CORRECTION DENSITY SELECTING

作　　者：朱自强[1] 黄国祥[1] 齐文秀[1] 李新剑[1] 

机构地区：[1]中南工业大学地质系,中国有色金属工业总公司物化探管理中心

出　　处：《中南工业大学学报》1995年第1期7-10,共4页Journal of Central South University of Technology(Natural Science)

基　　金：国家自然科学基金

摘　　要：依据重力曲面的分形维最小值确定重力地形改正密度，从而减少重力异常与地形的相关性，提高异常的可靠性；首次对重力场进行分离，并直接用与地形尺度相当的异常进行分形统计。结果表明，局部场的无标度区间更为明显。The Bouguer densities are determined by using a new method based on the fractal di-mension minimization of the Bouguer anomaly surface。As a result,the topography gravita-tional influence on Bouguer anomaly is reduced and the gravity anomaly is much less correla-tiveto the topography,while,the reliability of Bouguer anomaly is higher.We use the Inter-polating Cut method to eliminate the regional fields in the gravity anomaly and use the localanomaly,whose scale is comparable to the topography,to estimate the fractal dlmension,Thedensitv which minimizes the fractal dimension of local anomaly is the optimum density.Thevariogram of the local anomaly shows that the scale-independent interval is much more dis-tinguished.As a result,the Bouguer density determined by the proposed method is more ac-curate,and the separated local anomaly is more reliable.

关 键 词：布格校正 局部场 密度 地球重力场 重力场 

分 类 号：P312.1[天文地球—固体地球物理学]