试论前寒武纪变质岩古地磁研究的可行性——以闽北地区的研究为例  

THE POSSIBILITY OF PALEOMAGNETIC RESEARCH ON THE PRECAMBRIAN METAMORPH1C ROCKS

作　　者：张惠民[1] 赵凤清[1] 

机构地区：[1]中国地质科学院天津地质矿产研究所

出　　处：《地质论评》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

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.

关 键 词：前寒武纪 变质岩 古地磁 剩磁 

分 类 号：P588.3[天文地球—岩石学]