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Origin of Early Cretaceous Guandian adakitic pluton in central eastern China: partial melting of delaminated lower continental crust triggered by ridge subduction
Luo, Ze-Bin1,2; Xue, Shuo1,2,3; Zhang, Li-Peng2,3; Li, He4; Li, Cong-Ying4; Zhang, Hong5; Liu, Yu-Long3; Ling, Ming-Xing1,7; Sun, Weidong4,6,7
2018
Source PublicationINTERNATIONAL GEOLOGY REVIEW
ISSN0020-6814
Volume60Issue:11-14Pages:1707-1720
Corresponding AuthorLing, Ming-Xing(mxling@gig.ac.cn)
AbstractEarly Cretaceous adakite or adakitic plutons are widely distributed in central eastern China, e.g. lower Yangtze river belt (LYRB), the south Tan-Lu fault (STLF), and the Dabie orogen. Their genesis, however, remains controversial. In this contribution, we present detailed geochemical and geochronological study on the Guandian pluton in central Anhui Province, eastern China, which has been formerly regarded as a part of the north belt in the LYRB and lately classified in the STLF. Namely, it is located near the boundary between ridge subduction related slab melting and partial melting of lower continental crust (LCC). The Guandian pluton consists of quartz monzonite and is metaluminous and high-K calc-alkaline according to the chemical composition. The samples show high SiO2 (59.15-62.32%), Al2O3 (14.51-15.39%), Sr (892-1184ppm), Sr/Y (56.74-86.32), and low Y (12.65-18.05ppm), similar to typical geochemical features of adakite. The Guandian adakitic rocks also exhibit high K2O (2.88-3.86%), MgO (3.89-5.24%), and Mg# (55-60), negative anomalies of high field strength elements (e.g. Nb, Ta, and Ti), and positive anomalies of Ba, Pb, and Sr. LA-ICP-MS zircon U-Pb dating yielded a weighted average age of 129.2 +/- 0.7Ma. Calculations of zircon Ce4+/Ce3+ (6.97-145) and (Eu/Eu*)(N) (0.23-0.42) on the basis of in situ zircon trace element analysis indicate that the magma had a lower oxygen fugacity relative to the ore-bearing adakites in the LYRB and Dexing, which is consistent with the fact of ore-barren in the research area. In combination with previous research, we propose that Guandian adakitic pluton was formed by partial melting of delaminated LCC triggered by Early Cretaceous ridge subduction of the Pacific and Izanagi plates. During ridge subduction, physical erosion destructed the thickened LCC and resulted in delamination, while thermal erosion facilitated partial melting of the delaminated LCC.
KeywordAdakitic pluton Early Cretaceous lower Yangtze river belt (LYRB) southTan-Lu fault (STLF) ridge subduction delamination lower continental crust (LCC) oxygen fugacity
DOI10.1080/00206814.2017.1393777
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2016YFC0600408] ; Natural Science Foundation of China[41421062] ; Natural Science Foundation of China[41103006] ; Natural Science Foundation of China[41402064] ; Guangdong Natural Science Funds[2014A030306032] ; Guangdong Natural Science Funds[2015TQ01Z611] ; Youth Innovation Promotion Association: [CAS][2016315]
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000443879500018
PublisherTAYLOR & FRANCIS INC
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/160245
Collection深海极端环境与生命过程研究中心
Corresponding AuthorLing, Ming-Xing
Affiliation1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangzhou, Guangdong, Peoples R China
4.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao, Peoples R China
5.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian, Shaanxi, Peoples R China
6.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Peoples R China
7.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Luo, Ze-Bin,Xue, Shuo,Zhang, Li-Peng,et al. Origin of Early Cretaceous Guandian adakitic pluton in central eastern China: partial melting of delaminated lower continental crust triggered by ridge subduction[J]. INTERNATIONAL GEOLOGY REVIEW,2018,60(11-14):1707-1720.
APA Luo, Ze-Bin.,Xue, Shuo.,Zhang, Li-Peng.,Li, He.,Li, Cong-Ying.,...&Sun, Weidong.(2018).Origin of Early Cretaceous Guandian adakitic pluton in central eastern China: partial melting of delaminated lower continental crust triggered by ridge subduction.INTERNATIONAL GEOLOGY REVIEW,60(11-14),1707-1720.
MLA Luo, Ze-Bin,et al."Origin of Early Cretaceous Guandian adakitic pluton in central eastern China: partial melting of delaminated lower continental crust triggered by ridge subduction".INTERNATIONAL GEOLOGY REVIEW 60.11-14(2018):1707-1720.
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