Petrogenesis of the Neoproterozoic Baoxing Complex and Its Constraint on the Tectonic Environment in Western Margin of Yangtze Craton
详细信息
- 责任者：Liu Shuwen (Key Laboratory of Orogenic Belts and Crustal Evolution ; Ministry of Education ; Peking University ; Beijing 100871 ; China) ; Yang Kai
- 刊名：Earth Science Frontiers
- 出版年：2009
- 卷期：16(2)
- 关键词：杂岩 ; complexes ; 片麻岩 ; gneisses ; 二长花岗岩 ; monzogranite ; 扬子地台 ; Yangtze Platform
- 页码：p.107-118
- 图表：12 illus., 2 tables, 27 refs.
- 分类号：0802
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
Neoproterozoic Baoxing Complex in middle to lower metamorphic grade, located in western margin of Yangtze Craton, consists mainly of metamorphic gabbroic, dioritic gneisses, tonalitic and granodioritic gneisses, and massive monzogranites. The studies of petrochemistry and Sm-Nd isotopes of Baoxing Complex reveal that the gabbroic and dioritic magmas came from a congenetic magma derived from the partial melting of spinel lherzolites in depletive mantle, and that the magma was intensively contaminated by crustal materials during its emplacement. The tonalitic and granodioritic magma were derived from the partial melting of metamorphic basalts in the lower crust.
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