摘要
本文利用南通幅区域地质调查的重磁异常数据,在重磁异常特征分析的基础上,采用一维频谱分析法对南黄海进行磁性基底反演。结果表明:南黄海属于扬子块体向海域的延伸,具有元古代结晶基底和古生代褶皱基底的双基底结构,其磁性基底深度在2—10km之间变化,是褶皱基底与磁性层最小埋深的结合,在坳陷和隆起上表现不同。通过利用综合地质和地球物理综合方法,对南黄海区域的四大构造单元华北—狼林地块、扬子—京畿地块、华南—岭南地块、东海大陆架进行重磁异常变化特征和磁性基底特征分析,为研究区断裂等区域构造特征解释提供了依据。
We studied the magnetic basements in the southern Yellow Sea by gravity and magnetic data inversion, and analyzed the rock magnetism. One-dimensional spectrum analysis was used in the inversion. The depths of magnetic basement were calculated and the contours drawn. The southern Yellow Sea is the marine extension of the Yangtze Block in tectonics, and features two-layered basement that composed of the Proterozoic crystalized layer and the Paleozoic folded layer. The magnetic basements are the combination of the folded basement and the top magnetosphere in depth range of 2—10km, which reflects the regional tectonic framework, and provided basic information on geological structure of the area.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
2014年第5期946-953,共8页
Oceanologia Et Limnologia Sinica
基金
国土资源部海底矿产资源重点实验室开放基金
KLMMR-2013-A-30号
天然气水合物专项数据库建设及战略研究
GZH201100312号
关键词
南黄海
磁性基底
重磁异常
一维频谱分析
Southern Yellow Sea
magnetic basement
gravity and magnetic anomaly
one-dimensional spectrum analysis
