盆地深层火山岩磁异常的增强方法  

ENHANCEMENT OF MAGNETIC ANOMALIES IN DEEP VOLCANIC BASIN

作　　者：王玉珍[1] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《海洋地质前沿》2014年第6期59-65,共7页Marine Geology Frontiers

基　　金：国家重点基础研究发展计划(973)(2009CB219307)

摘　　要：通过模型正演分析发现,盆地深层火山岩产生的磁异常不是很大,表现为叠加在强背景之上的次级异常。基于积分迭代延拓方法提出了增强盆地深层火山岩磁异常信息的新方法—积分迭代延拓平化曲。该方法不仅能起到增强盆地深层火山岩磁异常的作用,而且还能起到消除火山岩埋深不同对磁异常形态和大小的影响,以达到均衡磁异常的目的。将该方法应用到松辽盆地的深层火山岩预测中见到了明显的应用效果。Forward modeling indicates that the magnetic anomalies in deep volcanic basin are usually not big, and occur as secondary anomalies superimposed on a strong background. Based on the inte- gral iteration continuation method, we proposed in this paper a new method, i.e. the integral iteration continuation level curve, for identification of deep basin volcanic rocks from the magnetic anomaly information. This method can not only enhance the magnetic anomalies in the deep volcanic basin, but also eliminate the effects of shape and size of volcanic rocks in different depth to achieve balanced magnetic anomalies. Application of this method is successful to the deep volcanic rocks in the Songliao Basin.

关 键 词：深层火山岩 火山岩磁异常 积分迭代延拓平化曲 松辽盆地 

分 类 号：P318.5[天文地球—固体地球物理学]