Petrogenesis and Tectonic Significance of the Neoproterozoic Danba Metabasalt in Western Yangtze Block
详细信息
- 责任者：Lin Guangchun (College of Earth Science and Resources ; Chang’an University ; Xi’an 710054 ; China)
- 刊名：Acta Petrologica et Mineralogica
- 出版年：2013
- 卷期：32(4)
- 关键词：变玄武岩 ; metabasalt ; 四川 ; Sichuan Province
- 页码：p.485-495
- 图表：6 illus., 2 tables, 55 refs.
- 分类号：0802
- issnNo：ISSN1000-6524
- isbnNo：CN11-1966/P
摘要
Petrology, geochemical and Nd isotopic data are reported for the Neoproterozoic Danba metabasalt in the Kangdian Rift on the western margin of the Yangtze block. The basaltic magma was generated in an intraplate setting, and was generated by partial melting of OIB mantle source region, with variable degrees of contamination of SCLM during magma ascending; in addition, some samples might have experienced contamination of the lower crust. These samples reveal some plume magmatism characteristics in petrochemistry, and imply that magmatism was probably related to the Neoproterozoic plume event, which resulted in the breakup of Rodinia supercontinent.