塔里木盆地二叠纪火成岩分布特征——基于高精度航磁资料  

Distribution characteristics of permian igneous rock in Tarim basin——based on the high-precision aeromagnetic data

作　　者：闫磊[1] 李明[1] 潘文庆[2] 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]塔里木油田勘探开发研究院,库尔勒841000

出　　处：《地球物理学进展》2014年第4期1843-1848,共6页Progress in Geophysics

基　　金：国家重大科技专项(2008ZX05004-04)资助

摘　　要：本文利用1:20万高精度航磁资料,通过向上延拓、求取剩余异常等手段,分析了塔里木盆地航磁异常与盆地岩性体的对应关系.通过盆地基底断裂的识别,认为盆地二叠纪火成岩岩体的发育与基底断裂密切相关,在航磁异常图上表现为基底断裂附近的串珠状、似圆锥型航磁异常;结合盆地地震及钻井资料,将塔里木盆地二叠纪火成岩分为北部中酸性侵入岩、中西部基性火山岩、南部中酸性火山岩及东北部中酸性火山岩四个区带,火成岩的形成受控于板块构造运动.Based on 1：200thousand high-precision aeromagnetic data,upward continuation and the residual anomaly are used to analyze the the relationship between the aeromagnetic anomaly and lithologic body in tarim basin.The Permian igneous rock is closely related to basement fault after the identification of basement faults,igneous rock nearby the basement faults is moniliform and homo-conical in the aeromagnetic anomaly map.Combined with the seismic and drilling data,the Permian igneous rocks in the Tarim Basin can be divided into four zones：intermediate-acid intrusive rock of northern area,basic volcano rock of middle-western area,intermediate-acid volcano rock of southern area and intermediate-acid volcano rock of northeast area,and the igneous rock is closely related to plate tectonic movement.

关 键 词：塔里木盆地 航磁异常 火成岩 基底断裂 构造运动 

分 类 号：P318[天文地球—固体地球物理学]