Magnetic Structure of the Dengfeng-Lushan Crustal Cross-Section,Henan

被引：4

作者：

刘庆生 ^{[1
]}

高山 ^{[1
]}

徐启东 ^{[1
]}

机构：

[1] China University of Geosciences,Wuhan 430074,PRC

来源：

Science in China(Series B) | 1994年 / 08期

基金：

中国国家自然科学基金;

关键词：

crustal section; magnetic structure; granulite facies; magnetic hysteresis loop; Curie point;

D O I：

暂无

中图分类号：

P318.4 [岩石磁性及古地磁学];

学科分类号：

070801 ;

摘要：

Magnetic parameters for rocks from a crustal cross-section exposed in the Dengfeng-Lushan area,Henan Province are systematically determined.The results,along with their mineralogy,chemical composition,density and P-wave velocity,indicate that there is a general increase in susceptibilityK,natural remanent magnetization J.and saturation isothermal remanence Jwith increasing metamorphicgrade （apparent crustal depth） from the Early Proterozoic Angou Group （greenschist facies） through theLate Archean Dengfeng Group （amphibolite facies） to the Taihua Group （high-amphibolite to granulitefacies）.Metasedimentary rocks of the Angou and Dengfeng Groups show a clear paramagnetic nature,whileother rock types are dominantly ferrimagnetism.The Taihua Group reflects the magnetic distribution of thelower crust of the cross-section and has average K,Jand Jvalues of 6680×10SI,0.166 A/m and 71.78A/m,respectively,which are in good agreement with those of other exposed high-grade metamorphic ter-rains in the world.

引用

页码：991 / 1000

页数：10