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Syn-collisional adakitic granodiorites formed by fractional crystallization: Insights from their enclosed mafic magmatic enclaves (MMEs) in the Qumushan pluton, North Qilian Orogen at the northern margin of the Tibetan Plateau
Chen, Shuo1,2,3; Niu, Yaoling1,2,4; Li, Jiyong1,2,3; Sun, Wenli1; Zhang, Yu5; Hu, Yan1,2; Shao, Fengli1,2,3
2016-04-01
发表期刊LITHOS
卷号248页码:455-468
文章类型Article
摘要The Qumushan (QMS) syn-collisional granodiorite, which is located in the eastern section of the North Qilian Orogen at the northern margin of the Greater Tibetan Plateau, has typical adakitic characteristics and also contains abundant mafic magmatic enclaves (MMEs). This recognition offers an unprecedented insight into the petrogenesis of both the adakitic host granodiorite and the enclosed MMEs. The MMEs and their host granodiorites share many characteristics in common, including identical crystallization age (similar to 430 Ma), same mineralogy, similar mineral chemistry and whole-rock isotopic compositions, indicating their genetic link. The MMEs are most consistent with being of cumulate origin formed at earlier stages of the same magmatic system that produced the QMS adakitic granodiorite. Subsequent replenishment of adakitic magmas could have disturbed the cumulate piles as "MMEs" dispersed in the adakitic granodiorite host during emplacement. The geochemical data and petrogenetic modeling of trace elements suggest that the QMS adakitic host granodiorite is most consistent with fractional crystallization dominated by the mineral assemblage of the MMEs. The parental magma for the QMS granodiorite is best explained as resulting from partial melting of the ocean crust together with recycled terrigenous sediments during continental collision, which may have also experienced interaction with mantle peridotite during ascent. (C) 2016 Elsevier B.V. All rights reserved.
关键词Adakitic Rocks Mafic Magmatic Enclaves Cumulate Syn-collisional Granodiorite North Qilian Orogen
DOI10.1016/j.lithos.2016.01.033
收录类别SCI
语种英语
WOS记录号WOS:000373863900031
引用统计
文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/126266
专题海洋地质与环境重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England
5.Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Peoples R China
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Chen, Shuo,Niu, Yaoling,Li, Jiyong,et al. Syn-collisional adakitic granodiorites formed by fractional crystallization: Insights from their enclosed mafic magmatic enclaves (MMEs) in the Qumushan pluton, North Qilian Orogen at the northern margin of the Tibetan Plateau[J]. LITHOS,2016,248:455-468.
APA Chen, Shuo.,Niu, Yaoling.,Li, Jiyong.,Sun, Wenli.,Zhang, Yu.,...&Shao, Fengli.(2016).Syn-collisional adakitic granodiorites formed by fractional crystallization: Insights from their enclosed mafic magmatic enclaves (MMEs) in the Qumushan pluton, North Qilian Orogen at the northern margin of the Tibetan Plateau.LITHOS,248,455-468.
MLA Chen, Shuo,et al."Syn-collisional adakitic granodiorites formed by fractional crystallization: Insights from their enclosed mafic magmatic enclaves (MMEs) in the Qumushan pluton, North Qilian Orogen at the northern margin of the Tibetan Plateau".LITHOS 248(2016):455-468.
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