重力梯度张量分量频率域转换处理方法  

Frequency domain transformation method for gravity gradient tensor components

作　　者：舒晴[1,2] 朱晓颖[2] 周坚鑫[2] 高维[2] 尹航[2] 

机构地区：[1]吉林大学地球探测科学与技术学院,长春130021 [2]中国国土资源航空物探遥感中心,北京100083

出　　处：《地球物理学进展》2016年第6期2633-2640,共8页Progress in Geophysics

基　　金：国家高技术研究发展计划(2011AA060501);中国地质调查(1212011087013)项目资助

摘　　要：航空重力梯度测量作为一种高效快速和高分辨率勘探手段,在固体矿产资源勘查和油气勘探中发挥着日益重要的作用.目前,商用部分张量航空重力梯度测量系统和研制中的一下代超导航空重力梯度测量系统仅能测量重力梯度张量中的部分张量分量或分量组合,不利于后续地质解释和测量成果应用.本文基于重力位微分的频率域通用公式,针对Falcon部分张量重力梯度测量系统,以重力位为纽带,建立了重力梯度张量分量频率域转换公式,实现了基于平面观测数据的重力梯度张量分量快速转换处理算法,通过理论模型试验证明了算法的正确性和有效性.Airborne gravity gradiometry plays a more and more important role in the mineral resources and hydrocarbon exploration in recent years as its high efficiency and distinctive spatial resolution. Nowadays,most commercial airborne gravity gradiometer for geophysical exploration and the superconducting gravity gradiometer being developed only acquire parts of gravity gradient tensor components or their combined components. It is a big challenge for only using parts of components of gravity gradient tensor for geology interpretation. Thus, it is important for transforming gravity gradient tensor form parts of components measuring. Based on the general formula of 2D Fourier transformation of gravity potential derivatives, we derived the transformation expressions of gravity gradient tensor for Falcon TM airborne gravity gradiometer survey data in frequency domain. The gravity gradient tensor transformation algorithm based on the FFT is designed for 2D grid data. The results of transformation for synthetic data with or without white noise demonstrate the validity and availability of the algorithm.

关 键 词：重力梯度张量 重力位 二维傅立叶变换 频率域转换处理 

分 类 号：P631[天文地球—地质矿产勘探]