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Evidence for rutile-bearing eclogite in the mantle sources of the Cenozoic Zhejiang basalts, eastern China
Yu, Xun1; Zeng, Gang2; Chen, Li-Hui2; Wang, Xiao-Jun2; Liu, Jian-Qiang3; Xie, Lie-Wen4; Yang, Tao2
2019
Source PublicationLITHOS
ISSN0024-4937
Volume324Pages:152-164
AbstractCenozoic intraplate basalts are widely distributed along the southeastern margin of Eurasia. Both carbonated and eclogitic/pyroxenitic components, which are considered related to oceanic crust recycling, have been identified in the mantle source of these basalts. However, the origin of the recycled oceanic crust and the genetic relationship between different source lithologies remain unclear. Here, we assess the source lithologies of late Miocene intraplate basalts from Ninghai, Zhejiang Province, eastern China, using new elemental and Sr-Nd-Hf isotopic compositional data. These data are also compared with those of the nearby Xinchang-Shengzhou flood basalts and other Cenozoic basalts in Zhejiang Province. New Mg isotopic compositions of the Ninghai and Xinchang-Shengzhou basalts are used to evaluate the potential influence of carbonated components during their formation. Nephelinites and basanites from Ninghai and Xinchang-Shengzhou have negative Ti and Hf anomalies, superchondritic Ca/Al ratios, and light Mg isotopic compositions (delta Mg-26 = -0.35 to -0.38 parts per thousand), indicating a carbonated component in the mantle source. By comparison, other Ninghai basalts have positive Ti and Nb anomalies, with Sm/Yb and Lu/Hf ratios that generally correlate with Ti/Ti* values. These observations indicate that rutile-bearing eclogite should also play an important role in the formation of the Ninghai basalts, in addition to mantle peridotite. The terrestrial mantle-likeMg-isotopic compositions of the Ninghai basalts further support their formation by high-degree partial melting of such mixed source. In the plots of Sr-Nd isotopes and Ti/Ti*, the nephelinites and basanites from Ninghai and Xinchang-Shengzhou show different trends compared with other Ninghai basalts, and the carbonated component in the mantle source of the former has similar and depleted Sr-Nd isotopes to the rutile-bearing eclogite source of the latter. Additionally, samples of these basalts show negative Delta epsilon(Hf) values similar to those of Pacific MORB. Subducted Pacific oceanic crust is therefore considered an appropriate source for both the carbonated and rutile-bearing eclogitic components. The Ninghai basalts provide an important insight into oceanic crust recycling in eastern China, with data indicating a genetic relationship between the carbonated component and rutile-bearing eclogite in the mantle sources of intraplate basalts. (C) 2018 Elsevier B.V. All rights reserved.
KeywordRutile Eclogite Carbonated peridotite Pacific oceanic crust Intraplate basalts Eastern China
DOI10.1016/j.lithos.2018.11.003
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Shanghai Sailing Program ; Shanghai Sailing Program ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Shanghai Sailing Program ; Shanghai Sailing Program ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Shanghai Sailing Program ; Shanghai Sailing Program ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Shanghai Sailing Program ; Shanghai Sailing Program ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation
WOS KeywordRECYCLED OCEANIC-CRUST ; TRACE-ELEMENT ; CONTINENTAL BASALTS ; CARBONATED MANTLE ; SOUTH CHINA ; 3 GPA ; PARTITION-COEFFICIENTS ; ISOTOPIC COMPOSITION ; GEOCHEMICAL EVIDENCE ; ALKALINE BASALTS
Language英语
Funding ProjectNational Natural Science Foundation of China[41672048] ; National Natural Science Foundation of China[41430208] ; National Natural Science Foundation of China[41530964] ; Shanghai Sailing Program[17YF1420300] ; China Postdoctoral Science Foundation[2017M621525]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Shanghai Sailing Program ; Shanghai Sailing Program ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Shanghai Sailing Program ; Shanghai Sailing Program ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Shanghai Sailing Program ; Shanghai Sailing Program ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Shanghai Sailing Program ; Shanghai Sailing Program ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation
WOS Research AreaGeochemistry & Geophysics ; Mineralogy
WOS SubjectGeochemistry & Geophysics ; Mineralogy
WOS IDWOS:000457819800011
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90511
Collection岩石圈演化国家重点实验室
Corresponding AuthorZeng, Gang
Affiliation1.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China
2.Nanjing Univ, State Key Lab Mineral Deposits Res, Sch Earth Sci & Engn, Nanjing 210023, Jiangsu, Peoples R China
3.Hohai Univ, Coll Oceanog, Inst Marine Geol, Nanjing 210098, Jiangsu, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Yu, Xun,Zeng, Gang,Chen, Li-Hui,et al. Evidence for rutile-bearing eclogite in the mantle sources of the Cenozoic Zhejiang basalts, eastern China[J]. LITHOS,2019,324:152-164.
APA Yu, Xun.,Zeng, Gang.,Chen, Li-Hui.,Wang, Xiao-Jun.,Liu, Jian-Qiang.,...&Yang, Tao.(2019).Evidence for rutile-bearing eclogite in the mantle sources of the Cenozoic Zhejiang basalts, eastern China.LITHOS,324,152-164.
MLA Yu, Xun,et al."Evidence for rutile-bearing eclogite in the mantle sources of the Cenozoic Zhejiang basalts, eastern China".LITHOS 324(2019):152-164.
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