Geochemical Characteristics of Cenozoic Volcanic Rocks in the Cuoqin-Sailipu Area, Tibet , China
详细信息
- 责任者：Yue Xiangyuan (College of Earth Sciences ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Ma Runze
- 刊名：Journal of Chengdu University of Technology
- 出版年：2011
- 卷期：38(5)
- 关键词：同位素地球化学 ; isotope geochemistry ; 火山岩 ; volcanic rocks ; 西藏 ; Tibet
- 页码：p.563-570
- 图表：illus., 3 tables, 15 refs.
- 分类号：0600
- issnNo：ISSN1671-9727
- isbnNo：CN51-1634/N
摘要
///The Lhasa block of the Tibetan plateau is one of the main areas collided by the Indian plate and Eurasian plate. The extensively developed magmatic rocks in this area record the whole process which the Cenozoic India continental lithosphere subducted to north and the type of magmatism of Lhasa block after collision and collision-after. The geochemical analysis of the Cenozoic volcanic rocks and Sr, Nd isotopic data from the Cuoqin-Sailipu area indicate that the volcanic rocks transit from calcium rock to alkaline-high potassium calcium rock and then to alkaline-shoshonitic rock and are characterized by rich alkali and high potassium. Sr isotope increases while Nd isotope decreases, and 87Sr/86Sr=0.710352~0.732268, εNd=-3.41~-15.82.