基于改进的2D多项式拟合及加权迭代算法的重力异常垂向分离

Gravity Anomalies Vertical Separation at Different Depths by an Improved 2D Polynomial Fitting and Weighting Iterative Algorithm

基于稳健的二维低阶多项式拟合及加权迭代算法,分别对模型重力位场数据和川滇地区实测地表重力异常数据进行地下不同深度层地质源的位场分离,并将所得结果与基于插值切割算法的位场分离结果以及川滇地区地质构造图进行比对。结果表明,该算法简单可靠,其结果可以用于川滇地区地质结构的精细反演和解释,也为其他更加深入的研究奠定了基础。

Based on a robust two-dimensional low-order polynomial fitting and weighting iterative algorithm,the gravity anomalies field of the synthetic models and those in the Sichuan-Yunnan region measured on the surface are separated vertically.The separated fields of strata with different depths from the measured gravity data are qualitatively compared with the results calculated by the interpolation-cutting potential field separation method and the geological structure map of the area as well.The results of comparison indicate the algorithms proposed in this paper are portable and reliable and can be helpful to fine inversion and interpretation of later geological structures,and other in-depth research or analysis.