气候变化领域集成服务门户(CCPortal): Petrogenesis of Transitional Large Igneous Province: Insights From Bimodal Volcanic Suite in the Tarim Large Igneous Province

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DOI	10.1029/2019JB018382
	Petrogenesis of Transitional Large Igneous Province: Insights From Bimodal Volcanic Suite in the Tarim Large Igneous Province
	Cheng Z.; Zhang Z.; Wang Z.; Wang F.; Mao Q.; Xu L.; Ke S.; Yu H.; Santosh M.
发表日期	2020
ISSN	21699313
卷号	125 期号:5
英文摘要	The Tarim large igneous province (TLIP) corresponds to a transitional large igneous province based on the high proportion of felsic rocks, classifying between mafic and silicic large igneous provinces. Here we investigate a bimodal suite including trachydacite, rhyolite, and basanite from the Northern Tarim Uplift using petrological, geochemical, stable, and radiogenic isotopic techniques with a view to understand the formation of the TLIP. Our study reveals a multistage origin involving multiple components, although the various rock suites are genetically linked and formed under a rift incubation setting related to mantle plume. The low δ26 Mg values (−0.48‰ to −0.71‰), Fe/Mn > 60, FC3MS (FeOT/CaO-3*MgO/SiO2) > 0.65, and high TiO2 contents (4.45–4.93 wt.%) of basanite from this suite suggest formation through partial melting of carbonated eclogite formed by recycled oceanic crust. The thick lithosphere beneath the Tarim Craton promoted extensive interaction between the underplated basaltic magmas and crust-derived magmas leading to the formation of multistage magma chambers. Geochemical and mineralogical studies suggest that the trachydacite experienced a mixing, assimilation, storage, and hybridization process, whereas the rhyolite was produced by fractional crystallization from the associated mantle-derived magma with significant crustal contamination. The abundance of amphibole in the trachydacite suggests a hydrous parental magma with H2O content in the range of 2.75 to 4.05 wt.%. Our results suggest that hydrous crustal components contributed significantly in the formation of voluminous felsic rocks of the TLIP. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	AFC; hydrous crust; MASH; plume-orogenic interaction; transitional LIP
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187872
作者单位	State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing, China; Ore Deposit and Exploration Centre (ODEC), Hefei University of Technology, Hefei, China; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; CAS Key Laboratory of Crust-Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China; Department of Earth Sciences, University of Adelaide, Adelaide, SA, Australia
推荐引用方式 GB/T 7714	Cheng Z.,Zhang Z.,Wang Z.,et al. Petrogenesis of Transitional Large Igneous Province: Insights From Bimodal Volcanic Suite in the Tarim Large Igneous Province[J],2020,125(5).
APA	Cheng Z..,Zhang Z..,Wang Z..,Wang F..,Mao Q..,...&Santosh M..(2020).Petrogenesis of Transitional Large Igneous Province: Insights From Bimodal Volcanic Suite in the Tarim Large Igneous Province.Journal of Geophysical Research: Solid Earth,125(5).
MLA	Cheng Z.,et al."Petrogenesis of Transitional Large Igneous Province: Insights From Bimodal Volcanic Suite in the Tarim Large Igneous Province".Journal of Geophysical Research: Solid Earth 125.5(2020).