应用地球物理(英文版)
應用地毬物理(英文版)
응용지구물리(영문판)
APPLIED GEOPHYSICS
2010年
4期
295-305
,共11页
李淑玲%孟小红%郭良辉%姚长利%陈召曦%李和群
李淑玲%孟小紅%郭良輝%姚長利%陳召晞%李和群
리숙령%맹소홍%곽량휘%요장리%진소희%리화군
South China Sea,gravity and magnetic fields%reduction to the pole at low latitudes,preferential continuation%igneous rock distribution
Igneous rocks in the South China Sea have broad prospects for oil and gas exploration. Integrated geophysical methods are important approaches to study the distribution of igneous rocks and to determine and identify igneous rock bodies. Aimed at the characteristics of gravity and magnetic fields in the South China Sea, several potential field processing methods are preferentially selected. Reduction to the pole by variable inclinations in the area of low magnetic latitudes is used to perform reduction processing on magnetic anomalies. The preferential continuation method is used to separate gravity and magnetic anomalies and extract the gravity and magnetic anomaly information of igneous rocks in the shallow part of the South China Sea. The 3D spatial equivalent distribution of igneous rocks in South China Sea is illustrated by the 3 D correlation imaging of magnetic anomalies. Since the local anomaly boundaries are highlighted gravity and magnetic gradients, the distribution characters of different igneous rocks are roughly outlined by gravity and magnetic correlation analysis weighted by gradient. The results show the distribution of igneous rocks is controlled and influenced by deep crustal structure and faulting.