等温剩磁各向异性及其在磁倾角校正中的应用  

ROCK ANISOTROPY OF ISOTHERMAL REMANENT MAGNETIZATION AND ITS APPLICATIONS IN CORRECTION OF INCLINATION SHALLOWING

作　　者：方大钧[1] 沈忠悦[1] 谈晓冬 

机构地区：[1]浙江大学地球科学系,杭州310027 [2]美国Lehigh大学地球与环境科学系

出　　处：《地球物理学报》2000年第5期719-724,共6页Chinese Journal of Geophysics

基　　金：国家自然科学基金项目!(4 9974 0 1 6)

摘　　要：等温剩磁各向异性是一种新的磁组构研究方法 .与非滞后剩磁各向异性的参数一样 ,等温剩磁各向异性的参数直接与岩石中的携磁矿物颗粒形状有关 ,它直接反映了岩石形成与压实作用下携磁矿物的变形和变位 .利用等温剩磁各向异性技术 ,有可能对磁倾角偏低进行有效的校正 .本文介绍了等温剩磁各向异性及其在磁倾角校正中的应用 ,并以塔里木盆地库车拗陷的苏维依组红色砂岩的实验为实例 ,获得磁倾角校正值 。Anisotropy of isothermal remanent magnetism is a recently developed technique for rock fabric study. The parameters of anisotropy of isothermal remanent magnetism are directly related to the shape of magnetic carrier minerals in rocks. They reflect the deformation and dislocation of carriers under compaction. The aim of this paper is to show its application on correction of inclination shallowing. A case study was performed on correcting inclination shallowing of the redbeds of Suweiyi formation of Eocene in Kuche depression, Tarim basin. The result shows the corrected inclination is very much consistent with the the oretical inclination of Eurasia plate. [

关 键 词：等温剩磁各向异性 塔里木盆地 磁倾角校正 古地 

分 类 号：P318.44[天文地球—固体地球物理学]