摘要
本文从变质作用与岩石矿物获得剩磁的关系和剩磁获得时间与同位素记年的相关性,岩石的形变对磁化方向的影响等方面讨论了前寒武纪变质岩古地磁研究的可行性;并列举部分国外前寒武纪早期岩石的例证;同时重点以闽北地区前寒武纪变质岩的古地磁结果为例,讨论了获得磁性的可信性及其在地质构造方面的意义。
This paper discusses the posibility of palaeomagnetic research on Precambrian metamorphic rocks from the relationship between metamorphism and acquired magnetic remanence of minerals and rocks, correlation between the time for acquisition of magnetic remanence and isotopic geochronological records and influence upon directions of magnetization by rock deformation during metamorphism or oro-genic processes. Some examples of paleomagp.etic studies of early Precambrian rocks abroad are cited. Meanwhile, take for example the palaeomagnetic results from Precambrian metamorphic rocks in northern Fujian Province, this paper discusses the reliability of and their significance in geology and tectonics.
出处
《地质论评》
CAS
CSCD
北大核心
1994年第4期312-321,共10页
Geological Review
基金
地质矿产部定向基金"闽北前寒武纪变质岩层层序划分和构造演化"研究成果之一
国家自然科学基金 48970136
关键词
前寒武纪
变质岩
古地磁
剩磁
Precambrian metamorphic rock, paleomagnetism, magnetic reirfane- nce isotopic timing, aparent polar wandering path (APWP)
