THE NORTH EDGE FRACTURE OF THE NORTH YELLOW SEA BASIN AND ITS CHARACTERS
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摘要: 根据最新调查获得的北黄海盆地海洋重力、海洋与航空磁力和多道地震资料,结合以往周边地区的资料,编制了北黄海空间重力异常图、布格重力异常图、磁力异常图。在重磁基础图件的基础上,通过解析延拓、任意方向导数计算、离散小波变换等处理,结合地震和地质资料,对北黄海北缘断裂带进行了综合分析。确定了北黄海北缘断裂带的存在,并对该断裂带的延伸长度、切割深度和性质进行了分析,指出北黄海北缘断裂带是辽东隆起与北黄海盆地的界线,断裂带两侧具有明显不同的地球物理场特征;而且断裂带具有多期活动的特点,对北黄海盆地的形成演化具有重要的控制作用。Abstract: According to new data on the sea gravity,marine and aviation magnetic and seismogram sections,and together with old data, the authors have worked out maps of the free-air gravity anomaly,Bouguer gravity anomaly and magnetic anomaly. Based on the maps, the north edge fracture of the North Yellow Sea basin has been systematically analyzed by combining traditional processing method with multi-scale decomposition of wavelets. The basic characters of the north edge fracture of the North Yellow Sea basin have been confirmed, and the extension length, the depth and the characters have been analyzed. The authors point out that the fracture is the borderline of the Liaodong apophysis and the North Yellow Sea basin, both sides of it have different geophysical fields and the fracture has the characters of multi-period activities and controls the formation and evolution of the North Yellow Sea basin.
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