摘要
本文根据河北迁安矿区的混合花岗岩、混合片麻岩的磁化率(量值)椭球与应变椭球的对比,说明:(1)磁化率椭球与应变椭球存在共轴关系,磁化率最小轴平行于应变椭球最小主应变方向成最大压缩方向,磁化率椭球可以作为岩石形变的“显示器”;(2)磁化率主值与主应变值存在幂指数关系。幂指娄 d 值因地区和岩石而不同。迁安矿区混合花岗岩和混合片麻岩的 d 值分别是:0.299±0.002和0.0588±0.004。
By a detailed comparsion between the magnetic and strain fabrics of magmatitic -granite and geneiss in the Qian An ore area. He Bei, it is shown that the two fabric ellipsoids are coaxial: the minimun susceptibility axes coincide with the minimun strain axes. The magnetic susceptibility ellipsoids can be thus used as a strain indicator. It is well known that there is an empirical ralationship of α. power between the mean axial ratios of both the ellipsoids. The value of a depends on different regions and rock types. For the magmatititc grainte and gneiss studied, y. are 0.299±0.002 and 0.588 ±0.004, respectively.
出处
《地质科学》
CAS
CSCD
北大核心
1992年第A12期333-341,共9页
Chinese Journal of Geology(Scientia Geologica Sinica)
关键词
岩石
应变椭球
磁导率
椭球
magnetic susceptibility anisotropy, magnetic fabric, magnetic susceptibility ellipsoid, strain elliposid
