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Geochemistry of I- and A-type granites of the Qingyang-Jiuhuashan complex, eastern China: Insights into early cretaceous multistage magmatism
Jiang, Xiao-Yan1; Luo, Jin-Cheng6; Guo, Jia1,5; Wu, Kai1,5; Zhang, Zhe-Kun1,5; Sun, Wei-Dong2,3,4,5; Xia, Xiao-Ping7
2018-09-01
Source PublicationLITHOS
ISSN0024-4937
Volume316Pages:278-294
Corresponding AuthorJiang, Xiao-Yan(jiangxy@gig.ac.cn) ; Sun, Wei-Dong(weidongsun@qdio.ac.cn)
AbstractThe Lower Yangtze River Belt in eastern China preserves evidence for widespread Mesozoic magmatism. Geochronological and geochemical studies have been conducted on the magmatic rocks and their associated mineral deposits; however, the relationships and melting conditions of spatially associated I- and A-type granites remain poorly constrained. The Qingyang-Jiuhuashan granitic complex in southern Anhui Province, eastern China, comprises primarily hornblende-bearing granodiorite, monzogranite, alkali-feldspar granite, and granitic porphyry, which yield zircon U-Pb ages of 142.2 +/- 1.3,134.6 +/- 1.2,126.4 +/- 1.9, and 125.9 +/- 1.2 Ma, respectively. Zircon grains from an enclave in the monzogranite yield an age of 134.5 +/- 1.1 Ma, similar to that of the host rock. The ages are consistent with the timing of regional magmatic events in southern Anhui Province. Whole-rock geochemical compositions indicate that the granodiorite and monzogranite represent I-type granites, whereas the alkali-feldspar granite and granitic porphyry display A-type signatures. The I- and A-type granites yield similar whole-rock Sr-Nd isotopic compositions, but distinct zircon delta O-18 values. We infer that the I-type granites were produced through water-fluxed melting of Mesoproterozoic basement during subduction of the paleo-Pacific plate. The A-type granites were generated through partial melting of the lower crust, triggered by extensional upwelling of mantle-derived magmas that provided heat and alkali-rich fluids. We identify three stages of Cretaceous tectono-magmatic activity that occurred in response to ridge subduction and subsequent slab rollback beneath eastern China. (C) 2018 Elsevier B.V. All rights reserved.
KeywordI-type granite A-type granite Zircon U-Pb geochronology Zircon O isotope Qingyang-Jiuhuashan
DOI10.1016/j.lithos.2018.07.025
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2016YFC0600408] ; National Natural Science Foundation of China[41703010] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB18000000] ; China Postdoctoral Science Foundation[Y701092001]
WOS Research AreaGeochemistry & Geophysics ; Mineralogy
WOS SubjectGeochemistry & Geophysics ; Mineralogy
WOS IDWOS:000445992500018
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/160382
Collection深海极端环境与生命过程研究中心
Corresponding AuthorJiang, Xiao-Yan; Sun, Wei-Dong
Affiliation1.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangzhou 510640, Guangdong, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266237, Peoples R China
3.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, Qingdao 266071, Peoples R China
4.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100094, Peoples R China
6.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550081, Guizhou, Peoples R China
7.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Jiang, Xiao-Yan,Luo, Jin-Cheng,Guo, Jia,et al. Geochemistry of I- and A-type granites of the Qingyang-Jiuhuashan complex, eastern China: Insights into early cretaceous multistage magmatism[J]. LITHOS,2018,316:278-294.
APA Jiang, Xiao-Yan.,Luo, Jin-Cheng.,Guo, Jia.,Wu, Kai.,Zhang, Zhe-Kun.,...&Xia, Xiao-Ping.(2018).Geochemistry of I- and A-type granites of the Qingyang-Jiuhuashan complex, eastern China: Insights into early cretaceous multistage magmatism.LITHOS,316,278-294.
MLA Jiang, Xiao-Yan,et al."Geochemistry of I- and A-type granites of the Qingyang-Jiuhuashan complex, eastern China: Insights into early cretaceous multistage magmatism".LITHOS 316(2018):278-294.
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