福建各时代玄武岩类的化学组分及对其形成环境的探讨

Discusion of the Chemical Composition of Different time Basalt Series and Its Formation Environment in Fujian Province

福建境内各时代玄武岩类的活动期次从晚太古代至晚第三纪共有９次之多，时间间隔达２０多亿年，各自所属的层位年代均比较明确。利用已掌握的地球化学分析资料，可对各期玄武岩的岩石类型进行划分，并进而探讨其各自源区的上地幔性质、成岩的构造环境及演化。按照玄武岩类地球化学特征所作出的判别，初步认为福建一些地区在晚太古代及中元古代时，一度出现过裂谷化和洋壳化的进程，只是发育均不良。

There are nine stages of activity of different time basalt from Late Archean to Late Tertiary in Fujian Province,which last two billion years.The chronohorizon of the basalt has been defined.Based on the geochemical analysis results,the type of different time basalt can be divided and the characters of the upper mantle,the tectonic setting of diagenetic stages and the tectonic evolution in the separate area of source rocks are also under discussion in the paper.According to the discriminant analysis of the geochemical characters of basalt series,preliminarily referred that there appeared the rifting and the ocean crustalization in Late Archean to Middle Proterozoic in the several areas of Fujian Province,which are not well developed.The most active stage of the crust mantle movement took place in Middle Proterozoic and Early Cretaceous.