【摘要】 作者对1605年琼州大地震震源区区域重、磁资料,依常规方法进行了一系列数据处理,包括布格重力异常的浅层沉积校正,向上延拓(9个上延高度)、滑动平均(6个方域窗口)、莫氏面反演,以及航磁△T的化极、化极向上延拓(6个上延高度),航磁△T的△X、△Y、△Z三个分量在垂向上的一阶导数、磁源重力、居里面反演等计算处理。本文系统阐述了各项计算处理的结果及其反映的重、磁场特征,指出所论区域重、磁异常等值线的展布及变化都很有规律,各项异常等值线中的主要梯级带及同形扭曲带,不同类型、不同方向的异常交接带,大体上比较吻合,可以互相对应,互为检验和补益;并且,其线性异常、异常等值线展布的梯级带或同形扭曲带,均以北东东走向有规律地分布为主,北北西—北西及北东走向者居次要地位。更多还原

【Abstract】 A series of data processing have been made from the regional gravity-magnetic anomalies in the focal area of the 1605 Qiongzhou great earthquake by regular methods.The gravity anomaly has been processed in 1 ) shallow deposition correction; 2 ) continuation upwards to 5 , 10, 15, 20, 25, 30, 40, 50 and 60 km; 3 ) moving average, with the area window being 20×20, 30×30, 40×40, 60×60, 80×80 and 100×100km2; and 4) Moho calculation.And the (△T ) aeromagnetic anomalt has been processed in 1 ) reduced to the pole; 2 ) continuation of ihe △T aeromagnetic anomaly after being reduced to the pole, with the continuation height being 5 , 10, 20, 30, 40 and 50 km; 3 ) first derivative calcnlation of the three vertical components in the △T aeromagnetic anomaly, △X, △y, △z; 4 ) gravity calculation from the magnetic sources; and 5 ) calculation on the depth of the Curie surface. This paper explains systematically the above calculating-processing results and the gravity-magnetic chracteri sties reflected by them, points out that the regional gravity-magnetic isoanomalic contour is distributed and changed regularly, that the major gradient zones, the isomorphic contorted zones and the joint zones of anomalies different in type and direction in all the anomaly isoline maps coincide and correspond to the whole. They can be tested and complemented each other. Moreover, the zones above are mostly distributed regularly in the NEE strike, secondarly in the NNW-NW and the NE diretions更多还原