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Mesozoic high-Mg andesites from the Daohugou area, Inner Mongolia: Upper-crustal fractional crystallization of parental melt derived from metasomatized lithospheric mantle wedge
Meng, Fanxue1,2; Gao, Shan3; Song, Zhaojun1; Niu, Yaoling4,5; Li, Xuping1
2018-03-01
Source PublicationLITHOS
ISSN0024-4937
Volume302Pages:535-548
Corresponding AuthorMeng, Fanxue(mengfx@lzu.edu.cn) ; Song, Zhaojun()
AbstractMineral chemistry, major- and trace-element data, zircon U-Pb ages, and Sr-Nd isotopic data are presented for a suite of volcanic rocks from the Daohugou area, Ningcheng City, Inner Mongolia, on the northern margin of the North China Craton. Samples from the suite are of basaltic andesite to rhyolite in composition, with the rocks containing <60 wt% SiO2 have high MgO, Cr, and Ni contents, and classify as high-Mg andesites (HMAs). Zircons from a rhyolite yielded weighted mean Pb-206/U-238 age of 164 +/- 1 Ma, indicating that the Daohugou volcanic suite is coeval with the Tiaojishan Formation of northern Hebei and western Liaoning Province. The HMAs have similar enriched-mantle I (EMI)-type isotopic compositions to each other, with low epsilon(Nd) (t) values, moderate (Sr-87/Sr-86)(i) ratios, enrichment in LREEs relative to LILEs, and depletion in HFSEs (e.g., Nb, Ta, Ti), indicating formation through protracted fractional crystallization of a common parental magma. The unusually low CaO contents and CaO/FeO ratios of olivine phenocrysts in the HMAs suggest that the parental melt was subduction-related. The results of Rhyolite-MELTS modelling indicates that HMAs may form through upper-crustal fractional crystallization from arc basalts. Therefore, the Daohugou HMAs were most likely formed through fractional crystallization of a parental melt derived from metasomatized lithospheric mantle at crustal depths. The addition of "water" to the cratonic keel may have played a key role in the destruction of the North China Craton. (C) 2018 Elsevier B.V. All rights reserved.
KeywordHigh-Mg andesite North China Craton Metasomatized lithospheric mantle Upper crustal fractional crystallization
DOI10.1016/j.lithos.2018.01.032
Indexed BySCI
Language英语
WOS Research AreaGeochemistry & Geophysics ; Mineralogy
WOS SubjectGeochemistry & Geophysics ; Mineralogy
WOS IDWOS:000428497500034
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/158783
Collection中国科学院海洋研究所
Corresponding AuthorMeng, Fanxue; Song, Zhaojun
Affiliation1.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Qingdao 266590, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China
3.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Hubei, Peoples R China
4.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
5.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England
Recommended Citation
GB/T 7714
Meng, Fanxue,Gao, Shan,Song, Zhaojun,et al. Mesozoic high-Mg andesites from the Daohugou area, Inner Mongolia: Upper-crustal fractional crystallization of parental melt derived from metasomatized lithospheric mantle wedge[J]. LITHOS,2018,302:535-548.
APA Meng, Fanxue,Gao, Shan,Song, Zhaojun,Niu, Yaoling,&Li, Xuping.(2018).Mesozoic high-Mg andesites from the Daohugou area, Inner Mongolia: Upper-crustal fractional crystallization of parental melt derived from metasomatized lithospheric mantle wedge.LITHOS,302,535-548.
MLA Meng, Fanxue,et al."Mesozoic high-Mg andesites from the Daohugou area, Inner Mongolia: Upper-crustal fractional crystallization of parental melt derived from metasomatized lithospheric mantle wedge".LITHOS 302(2018):535-548.
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