福建将乐一带白云母化花岗岩成因的初步探讨  

A PRELIMINARY DISCUSSION ON THE ORIGIN MUSCOVITIZED GRANITE IN JIANGLE AREA,FUJIAN

作　　者：游天寿 黄新鹏 

机构地区：[1]福建省区域地质调查队

出　　处：《福建地质》1989年第3期225-234,T001,共11页Geology of Fujian

摘　　要：本文以野外地质学、岩石学、岩石化学及微量元素、稀土元素地球化学等大量的实际资料为基础,从白云母化花岗岩的形成方式、物质来源和岩体形成的构造环境等方面来探讨将乐一带白云母化花岗岩的成因问题。论证了福建加里东期白云母化花岗岩是地壳深部硅铝质重熔的花岗岩,具有典型的岩浆型花岗岩特征。将乐一带白云母化花岗岩形成于加里东旋迥地槽回返封闭的晚期,因碰撞而闭合所产生的强烈褶皱促使地壳增厚,深部温度升高,从而局部产生重熔形成富铝花岗岩浆,沿构造上侵定位于震旦-寒武纪变质岩中。属陆-陆碰撞后花岗岩。Based on vast amount of the actual data of field geology,petrology,prtrochemistry and the geochemistry of trace ele-ments and REE,the authors herein discussed the origin of muscovitized granites in Jiangle area with their formationalmode,materal resouce and the tectonic environment of their formation and also authenticated that Caledonian muscovitizedgranite are the silicic-aluminous anatectic granite in depth,which present the typical features of magmagranite.The muscovitized granite in Jiangle area was formed in the late inversion stage of Caledonian geosyncline.That thesrong folding formed by the collission and the closing made the crust thickening and the temperature increasing in depth toresult local anatexis and the formation of rich-alumine granitic magma,which intruded upward into Sinian-Cambrisn meta-morphic rocks.In view of the geochemical pattern,the muscovitized granite in Jiangle area may be formed after the conti-nent-continent collision.

关 键 词：白云母化 花岗岩 成因 福建 

分 类 号：P588.121[天文地球—岩石学]