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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
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| 2018-09-01 | |
| Source Publication | LITHOS
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| ISSN | 0024-4937 |
| Volume | 316Pages:278-294 |
| Corresponding Author | Jiang, Xiao-Yan(jiangxy@gig.ac.cn) ; Sun, Wei-Dong(weidongsun@qdio.ac.cn) |
| Abstract | The 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. |
| Keyword | I-type granite A-type granite Zircon U-Pb geochronology Zircon O isotope Qingyang-Jiuhuashan |
| DOI | 10.1016/j.lithos.2018.07.025 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National 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 Area | Geochemistry & Geophysics ; Mineralogy |
| WOS Subject | Geochemistry & Geophysics ; Mineralogy |
| WOS ID | WOS:000445992500018 |
| Publisher | ELSEVIER SCIENCE BV |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.qdio.ac.cn/handle/337002/160382 |
| Collection | 深海极端环境与生命过程研究中心 |
| Corresponding Author | Jiang, Xiao-Yan; Sun, Wei-Dong |
| Affiliation | 1.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 Affilication | Institute 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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