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磁静区与磁异常条带不同,具有宽缓的低幅值磁异常特征,但可能同样包含了从陆壳张裂到海底扩张早期的构造活动和演化信息。为了加深认识南海北部陆缘磁静区,归纳了全球深海和边缘两大类型磁静区的物理、化学及构造三大成因,主要包括大西洋和西太平洋侏罗纪磁静区,以及北太平洋、印度洋和南大洋白垩纪磁静区,强调磁静区与不同程度地幔柱活动、斜交扩张初始产生的小型错断磁源体及隐含弱磁条带关系的重要性。总结了南海北部陆缘磁静区的研究现状,并从区域综合地球物理和地幔热活动作用两方面探讨了南海北部陆缘磁静区的可能成因机制,最后阐述了需要关注的研究重点及其研究意义。
Unlike the magnetic anomaly bands, the magnetostrictive zone has the characteristics of gentle low-amplitude magnetic anomalies, but may also contain tectonic activity and evolutionary information from the continental crust to the early expansion of the seafloor. In order to deepen the cognition of the northern margin of the South China Sea, the three major causes of the physical, chemical and tectonic settings of the deep-sea and marginal magnetophores are summarized, including the Jurassic magnetically quiet zone in the Atlantic Ocean and the Western Pacific Ocean, the North Pacific Ocean, The Indian Ocean and the Southern Ocean Cretaceous magnetostatic zone emphasize the importance of the relationship between the magnetostatic zone and the different degrees of mantle plume activity and the initial occurrence of the diagonal crossing expansion and the relationship between the implicit weak magnetic field and the implicit weak magnetic strip. This paper summarizes the research status of the northern margin of the South China Sea, and explores the possible genesis mechanism of the northern margin of the South China Sea from two aspects of the integrated geophysical and mantle thermal activities. Finally, the research focuses and their Significance.