海洋科学2016，Vol.40Issue(5)：132-140,9.DOI:10.11759/hykx20150307004
冲绳海槽及邻区磁异常特征及其地质解释
Magnetic anomaly pattern and interpretation of the Okinawa Trough and adjacent areas
摘要
Abstract
In this study, we applied pole-reduction calculations with varied declinations and inclinations to the total magnetic anomaly of the Okinawa Trough and adjacent areas to obtain the pole magnetic anomaly. In a comparison and correlation of theΔT and pole magnetic anomalies, we examined several tectonic problems of the study areas. The results show that the basement of the Okinawa Trough is buried deeply and the depocenter is located in the western part of the trough. The large-scale basement uplift of the Diaoyudao belt terminates in the south by the Yu-shan-Kume fault belt. The shelf edge area south of the Yushan-Kume fault belt is covered by thick sediments. The NW-NWW trending dextral strike-slip faults are represented by the Yushan-Kume fault, the Zhoushan-Kunigami fault, and the Tokara fault, which have propagated southeastward during the tectonic evolution history of the East China Sea, then transferred the tectonic stress field and formed the main boundaries of the blocked tectonic frame-work from the south to the north. Induced by the Taiwan collision process, the tectonic trends of the southwestern part of the shelf have rotated clockwise. The magnetic anomaly patterns of the arc and forearc areas are influenced by the subducting Philippine slab.关键词
冲绳海槽/ΔT磁异常/化极磁异常/构造地质Key words
Okinawa Trough/total magnetic anomaly/pole-reduced magnetic anomaly/geotectonics分类
海洋科学引用本文复制引用
尚鲁宁,张训华,韩波,杨传胜..冲绳海槽及邻区磁异常特征及其地质解释[J].海洋科学,2016,40(5):132-140,9.基金项目
国家重点基础研究发展计划项目(2013CB429701) （2013CB429701）
国家自然科学基金项目(41506080)@@@@National Key Basic Research Program of China, No.2013CB429701 （41506080）
National Natural Science Foundation of China, No.41506080。 （）
