Chemico-viscous remanent magnetization in the oxidation of siderite and its implications in paleomagnetism

被引：0
|
作者：
Pan, YX [1 ]
Zhu, RX [1 ]
Liu, JM [1 ]
机构：
[1] Chinese Acad Sci, Inst Geophys, Beijing 100101, Peoples R China
来源：
SCIENCE IN CHINA SERIES D-EARTH SCIENCES | 1999年 / 42卷 / 04期
关键词：
CVRM; phase transition of magnetic minerals; siderite; paleomagnetism;
D O I：
暂无
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
Studies have been done of the secondary chemico-viscous remanent magnetization (CVRM) produced in the oxidization and decomposition of high-purity crystal siderite specimens collected from Dalizi Deposit, Jilin Province. The CVRM intensity increases to a peak value at an annealing temperature of 490 degrees C. The direction of CVRM is always parallel to the applied field, and no self-reversal behavior has been observed in the transformation of maghemite to hematite.. It is suggested that the phase transition of magnetic minerals can make great contribution to secondary magnetization. Results of successive beating at low temperature indicate that the crystal mineral siderite is basically stable. Finally, the paleomagnetic significance of CVRM is discussed.
引用
收藏
页码：442 / 448
页数：7
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