Integrated Regional Geophysical Study on Lithospheric Structure in Eastern China Seas and Adjacent Regions

• Published in: Chinese journal of geophysics 2014-11, Vol.57 (6), p.846-859
• Main Authors: Jian-Sheng, WU, Jia-Lin, WANG, Bing, CHEN, Xin-Bing, ZHANG
• Format: Article
• Language: English
• Subjects: Block structure; Blocking; Boundaries; China; Eastern China seas and adjacent regions; Geological faults; Geophysics; Gravitation; Integrated geophysical study; Lithosphere structure; Magnetic fields; Seas
• ISSN: 0898-9591; 2326-0440
• DOI: 10.1002/cjg2.20147

Using gravity and magnetic data of eastern China seas and adjacent regions, we calculated the Moho discontinuity, Curie boundary and thermal lithosphere interfaces and dealt with some processing of gravity and magnetic data to enhance the fault information. Based characters of the gravity and magnetic fields, we determined the distribution of major faults in this region, which can be divided into two systems: one is the plate boundary fault system, and the other is the system of block boundary faults and faults within blocks. With the fault systems, we divided the areas of eastern China seas and adjacent regions into eight blocks and four conjunction zones. The results indicate that the boundary between the Sino‐Korea and Yangtze blocks consists of the Wulian‐Qingdao fault in eastern China, the east marginal fault of the Yellow Sea, and the south marginal fault of the Cheju Island. The Jiang‐Shao fault extends to the south tip of the Korea Peninsula and serves as the boundary to separate the Yangtze and South China blocks.