下扬子地区区域磁异常和基底特征研究  

Regional Magnetic Anomalies and Basement Characteristics of Lower Yangtze Area

作　　者：郭彤楼[1] 

机构地区：[1]中石化南方勘探开发分公司,云南昆明650200

出　　处：《石油天然气学报》2005年第3期329-333,共5页Journal of Oil and Gas Technology

摘　　要：分析研究了下扬子地区的磁异常特征;应用小波分析技术,从观测的磁异常中分解出了区域磁异常;利用该地区的大地电磁测探(MT)反演的高阻基底特征和磁异常的矩谱法反演结果,确定了结晶基底的空间展布及地球物理特征(电性及视磁化强度的分布等),结合钻孔、周边和地表地质资料,对下扬子区基底的性质进行了研究,依据磁法和MT资料给出了基底单元划分图。The technique of wavelet analysis is deployed to separate regional magnetic anomalies from a magnetic field. By using the results of inversion of high resistance basement and magnetic anomalous square spectrum, the depth of crystal basement is determined, the distribution of apparent magnetic strength of the basement is inversed. In combination with drilling, peripheral and surface geologic data, the characters of Low Yangtze basement are studied.

关 键 词：下扬子区 结晶基底 区域磁异常 

分 类 号：P631.3[天文地球—地质矿产勘探]