Origin of Cenozoic Lithospheric Mantle in Several Areas of
详细信息
- 责任者：Liu Haiquan (School of Resources and Environmental Engineering ; Hefei University of Technology ; Hefei 230009 ; China) ; Yan Jun
- 刊名：Acta Petrologica Sinica
- 出版年：2010
- 卷期：26(9)
- 关键词：岩石圈地幔 ; lithospheric mantle ; 主要元素 ; major elements ; 微量元素 ; minor elements ; 中国 ; China
- 页码：p.2850-2868
- 图表：9 illus., 3 tables, 75 refs.
- 分类号：0400
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
Systematic major and trace elements analysis of spinel-lherzolites from Hannuoba, Nushan, Panshishan and Fangshan is carried out to identify the origin of Cenozoic lithosphere in eastern China and to further discuss the mechanisms of lithospheric thinning. The results indicate these areas share a “juvenile” lithospheric mantle, which is residual of upwelling mantle which ever underwent less than 10% partial melting. A less than 3% contribution of silica-enriched basaltic melts analogous to Cenozoic basalt in eastern China was involved in later metasomatism over Cenozoic lithospheric mantle.Distinctive dissimilarity between Cenozoic lithospheric mantle and Archean Cratonic lithospheric mantle in respect of major and trace elements, combined with remarkable similarity to partial melting and metasomatism modeling of trace elements argue predominately thinning mechanism of detachment for eastern part North China Craton lithospheric mantle.