Mineral Chemistry of Peridotite Xenoliths in Yangyuan Cenozoic Basalts: Significance for Lithospheric Mantle Evolution beneath the
- 责任者：Chen Xi (Faculty of Earth Sciences ; State Key Libratory of Geological Processes and Mineral Resources ; China University of Geosciences ; Wuhan 430074 ; China) ; Zheng Jianping
- 刊名：Earth Science
- 出版年：2009
- 卷期：34(1)
- 关键词：橄榄岩 ; peridotites ; 河北 ; Hebei Province
- 页码：p.203-219
- 图表：11 illus., 6 tables, 53 refs.
- 分类号：0802
- issnNo：ISSN1000-2383
- isbnNo：CN42-1233/P
Based on the petrographical study of peridotite xenoliths in Yangyuan Cenozoic basalts and chemical study of minerals, the paper mainly analyzes the LAM-ICP-MS trace element compositions of Cpx from the Yangyuan peridotitic xenoliths and discusses the nature and evolution of the Cenozoic SCLM beneath the center of the Trans-North China orogen. The SCLM beneath the Yangyuan area is heterogeneous, forming from the different partial melting of the primitive mantle., most melted less than 5~ of the total, except a few among 15%~20%. The coexistence of the fertile and refractory-transitional mantle was better explained by the effects of heterogeneous erosion, transformation and replacement of asthenospheric materials on the cratonic lithosphere mantle.