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利用NGDC720地磁模型提供的磁异常数据,分析了菲律宾海板块磁异常特征,进而对磁异常进行多尺度分解,给出了研究区岩石圈深部和浅部磁异常.结合热流分布特点和磁异常信息,进一步分析了研究区引起磁异常成因.菲律宾海板块区域的磁异常既反映了该区域岩石圈浅部的构造特征,也隐含深部构造信息.在西菲律宾海盆以及大东脊构造区,浅部构造磁异常信息较好地继承了深部构造特征,反映这些区域岩石圈的整体性特征.四国海盆与帕里西维拉海盆浅部磁异常信息显示了与近代(约10Ma)扩张轴一致的特征,且磁异常与海底构造走向不一致;而深部异常显示的帕里西维拉海盆磁异常走向与西菲律宾海盆一致的信息,可能指示帕里西维拉海盆岩石圈曾与西菲律宾海盆有过类似的演化史.
Based on the magnetic anomaly data provided by the NGDC720 geomagnetic model, the magnetic anomalies in the Philippine sea plate are analyzed, and then the magnetic anomalies are decomposed multi-scale, and the magnetic anomalies in the deep and shallow lithosphere of the study area are given. Combining the characteristics of heat flux distribution and magnetic anomaly information , The cause of magnetic anomaly in the study area is further analyzed.The magnetic anomaly in the Philippine Sea plate area not only reflects the tectonic features of the lithosphere in the area but also implies the deep structural information.In the western Philippines basin and the Dadongdang tectonic area, shallow The magnetic anomaly information of the tectonic structure well inherits the deep tectonic features and reflects the integrity characteristics of lithosphere in these areas.The shallow magnetic anomaly information of the Siguo Basin and the Parishivira Basin shows the same axis of expansion (about 10 Ma) Features, and the magnetic anomalies are inconsistent with the direction of the seafloor tectonics. However, the deep anomaly indications that the magnetic anomalies of the Parishvilla Basin are consistent with those in the West Philippine Basin may indicate that the Palaiwala Basin lithosphere had been associated with the West Philippine Basin Similar evolutionary history.