腾冲火山岩稀土和微量元素地球化学研究  

GEOCHEMISTRY OF THE RARE EARTH AND TRACE ELEMENTS IN THE VOLCANIC ROCKS IN TENGCHONG,CHINA

作　　者：周真恒[1] 向才英[1] 姜朝松[1] 

机构地区：[1]云南省地震局,昆明650041

出　　处：《地震研究》2000年第2期215-230,共16页Journal of Seismological Research

基　　金：云南省科技攻关项目

摘　　要：本文通过腾冲火山岩稀土和微量元素丰度的测试与分析 ,结合前人部分研究资料探讨了该区火山岩的稀土和微量元素地球化学特征 :各喷发期火山岩均富集LREE和Rb、Sr、Ba、U、Th等不相容元素 ;均具极为相似的稀土元素分配型式和微量元素地球化学模式 。In this paper, through the determination and analyses of the abundance of the rare earth and trace elements in the volcanic rocks in Tenchong and in combination with a part of the previous study data, the geochemical characteristics of rare earth and trace elements in the volcanic rocks have been studied. The volcanic rocks in each eruptive period enrich both LREE and incompatible elements Rb, Sr,Ba, U, Th etc., and have both the most similar REE patterns and geochemical patterns of the trace elements. This possibly reflects the same origins of the primary magmas of the volcanic rocks of all the periods.

关 键 词：稀土元素 微量元素 火山岩 腾冲地区 地球化学 

分 类 号：P588.14[天文地球—岩石学]