南海东北部的断裂分布及其构造格局研究  

A STUDY ON FAULT DISTRIBUTION AND TECTONIC FRAMEWORK IN NORTHEASTERN SOUTH CHINA SEA

作　　者：陈冰[1] 王家林[1] 钟慧智[1] 陈焕疆[1] 郝沪军[2] 李平鲁[2] 

机构地区：[1]同济大学海洋地质教育部重点实验室,上海200092 [2]中国海洋石油有限公司深圳分公司,广东深圳518067

出　　处：《热带海洋学报》2005年第2期42-51,共10页Journal of Tropical Oceanography

基　　金：国家重点基础研究发展规划项目(G20000467 02)

摘　　要：通过对南海东北部重磁异常的分析和处理,结合珠江口盆地、潮汕坳陷等地区的综合地质地球物理研究成果,根据研究区的重磁异常特征划分了4 个异常区。应用地球物理数据处理方法,推断了该区的主要断裂35条,其主要走向为NW、NE、NEE向及S N向4组。综合各方面研究成果在该区划分了7个构造单元。依据地震剖面、物性资料和重磁资料的分析,对南海东北部地区中生界的地层标定、构造与结构特征有了新的认识,研究了该地区前第三系基底和中生界的分布,并对南海东北部构造演化进行了探讨。Based on processing and analyzing of gravity and magnetic anomaly data from the northeastern South China Sea, four anomaly zones were divided in the studied area combining integrated geological and geophysical interpretation results of the Zhujiang River Mouth Basin and Chaoshan sag. Up to 35 major faults, with 4 strike directions in NW, NE, NEE, and S-N, were deduced using geophysical data processing methods, and 7 tectonic units were determined on the base of all sorts of research results. Furthermore, a new cognition about stratum calibration and tectonic features of mesozoic erathem in the northeastern South China Sea was obtained by analyzing the data of seismic profiles, physical properties and gravity & magnetic material. The Pre-Tertiary basement and the distribution of Mesozoic erathem were studied, and the tectonic evolution was also discussed in the northeastern South China Sea.

关 键 词：南海东北部 构造格局 断裂分布 数据处理方法 应用地球物理 研究成果 珠江口盆地 磁异常特征 东北部地区 重磁异常 综合地质 潮汕坳陷 构造单元 地震剖面 重磁资料 结构特征 前第三系 构造演化 中生界 异常区 研究区 划分 

分 类 号：P542.3[天文地球—构造地质学] X837[天文地球—地质学]