现代地质2012，Vol.26Issue(6)：1154-1161,8.
南海重力异常特征及其显著的构造意义
Characteristics of Gravity Anomalies in the South China Sea and Their Tectonic Implications
摘要
Abstract
Gravity anomalies can be used to infer the deep crustal structure in the South China Sea (SCS) where seismic data are limited to some specific points or profiles. This paper presents a comprehensive study of crustal structure by using gravity inversion for interface with seismic data constraints to invert depth of the Moho and to calculate crustal thickness, and by performing gravity anomalies correlative imaging method without constraints to construct the 3D subsurface distribution of equivalent density in the South China Sea. We also focus on the regional linear features of gravity anomalies and jointly use the continuation, horizontal gradient and linear feature enhancement filter to highlight the linear tectonics which always involve the density changes in horizontal , such as major deep faults, boundary of continental-oceanic crust, spreading axes of oceanic basin. The integrated geophysical analysis along the Guangzhou-Palawan geosciences transect demonstrates that the characteristics of the gravity anomalies and their inversion results allow us to reveal crustal structure and regional tectonics features in the large scale of the South China Sea.关键词
南海/重力异常/地壳结构/区域构造Key words
South China Sea/ gravity anomaly/ crustal structure/ regional tectonics分类
天文与地球科学引用本文复制引用
李淑玲,孟小红,郭良辉,姚长利..南海重力异常特征及其显著的构造意义[J].现代地质,2012,26(6):1154-1161,8.基金项目
国家专项项目(SinoProbe-01-05) （SinoProbe-01-05）
国家自然科学基金项目(41074095) （41074095）
国家“863”计划项目(2006AA09A1002-0201-3) （2006AA09A1002-0201-3）
地质过程与矿产资源国家重点实验室开放项目(GPMR0942). （GPMR0942）
