Geochemistry and Mantle Source Characteristics of the Permian Basalts in Moyun Area, Eastern Tanggula Range
详细信息
- 责任者：Duan Qifa (State Key Laboratory of Geological Processes and Mineral Resources ; China University of Geosciences ; Wuhan 430074 ; China) ; Wang Jianxiong
- 刊名：Acta Petrologica et Mineralogica
- 出版年：2010
- 卷期：29(2)
- 关键词：玄武岩 ; basalts ; 唐古拉山 ; Tanggula Mountains
- 页码：p.125-138
- 图表：7 illus., 2 tables, 63 refs.
- 分类号：0801
- issnNo：ISSN1000-6524
- isbnNo：CN11-1966/P
摘要
A systematical analysis of major and trace element compositions and whole-rock isotopes of the Gadikao Formation volcanic rocks indicates that the volcanic rocks belong to basalt in the petrologic and geochemical indicators. The Moyun basalts have low and insignificantly varying SiO2, Al2O3, MgO, Ni and Cr content. The characteristics of the Moyun basalts reveal that their formation was closely related to the mantle-plume activity. The basalts must have been formed in an intraplate spreading zone (incipient rift) and have characteristics of the active rift.