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Crust-mantle interaction during subduction zone processes: Insight from late Mesozoic I-type granites in eastern Guangdong, SE China

文献类型：期刊论文

作者Jia, Lihui4; Mao, Jingwen1; Liu, Peng3; Yu, Miao2
刊名JOURNAL OF ASIAN EARTH SCIENCES
出版日期2020-05-01
卷号192页码:18
ISSN号1367-9120
关键词Hf-O isotope I-type-granite Crust-mantle interaction Eastern Guangdong SE China
DOI10.1016/j.jseaes.2020.104284
英文摘要Zircon U-Pb dating and in-situ Hf-O isotopic compositions, combined with whole-rock geochemical and Sr-Nd isotope data, are systematically presented to constrain the timing and petrogenesis of the late Mesozoic granitoids in eastern Guangdong Province, SE China. Zircon U-Pb chronology shows that two intrusions were emplaced from the Middle Jurassic to Early Cretaceous (166-144 Ma). All the granitoids are classified as calcalkaline I-type granites with highly diverse elemental and isotopic compositions. The systematic variations in zircon Hf-O isotopes show that the granites can be categorized into three groups. The Donggang granitic porphyries (166 Ma) have the highest zircon delta O-18 values of 6.3-8.2%o (average of 7.7 parts per thousand) but the lowest epsilon(Hf)(t) values of - 8.0 to -1.4, with the oldest Hf model ages of 1.30-1.70 Ga. The Liuzhoushan monzogranites (144 Ma) have intermediate zircon delta O-18 values of 6.0-6.9%o (average of 6.4 parts per thousand) and epsilon(Hf)(t) values of - 5.0 to 0.3, with Hf model ages of 1.17-1.51 Ga. The late Early Cretaceous granitoids have the lowest delta O-18 values of 4.9-6.696o (average of 5.5 parts per thousand) but the highest epsilon(Hf)(t) values of - 3.2 to 3.3, with the youngest Hf model ages of 0.95-1.36 Ga. Zircon saturation temperatures of the Donggang, Liuzhoushan, and Xinwei (Sanrao) intrusions are calculated to be 642 degrees C, 722 degrees C, and 748 degrees C, respectively. Together with the variations in Sr-Nd isotopes, it appears that these granitoids were derived from the mixing of different proportions of mantle-derived components with Paleoproterozoic basement crust-derived magmas. The underplating of mantle-derived magmas into the continental crust, which supplied both heat and material contribution, was likely responsible for the generation of the most late Mesozoic I-type granites in eastern Guangdong. From Middle Jurassic to late Early Cretaceous, the increasing epsilon(Hf)(t) and epsilon(Nd)(t) values as well as the decreasing delta O-18 values and T(DM)2 ages indicate a progressive role of the crust-mantle interaction, corresponding to a gradually enhanced extensional tectonic environment. The northeast (NE)-ward younging trend and the enhanced crust-mantle interaction along coastal SE China were probably induced by the changing direction of the subducted plate from oblique to parallel to the continental margin.
WOS关键词ZIRCON U-PB ; ND ISOTOPIC COMPOSITION ; A-TYPE GRANITES ; SOUTH CHINA ; SOUTHEASTERN CHINA ; TECTONIC EVOLUTION ; NANLING RANGE ; HF ISOTOPES ; ZHEJIANG PROVINCE ; VOLCANIC-ROCKS
资助项目CGS Research Fund[JYYWF20180601] ; National Nature Science Foundation of China[41430314]
WOS研究方向Geology
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:000521111600017
资助机构CGS Research Fund ; CGS Research Fund ; CGS Research Fund ; CGS Research Fund ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; CGS Research Fund ; CGS Research Fund ; CGS Research Fund ; CGS Research Fund ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; CGS Research Fund ; CGS Research Fund ; CGS Research Fund ; CGS Research Fund ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; CGS Research Fund ; CGS Research Fund ; CGS Research Fund ; CGS Research Fund ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China ; National Nature Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/95498]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Jia, Lihui; Mao, Jingwen
作者单位1.Chinese Acad Geol Sci, MLR Key Lab Metallogeny & Mineral Assessment, Inst Mineral Resources, Beijing 100037, Peoples R China
2.Cent South Univ, Sch Geosci & Infophys, Changsha 410083, Peoples R China
3.ChangAn Univ, Sch Earth Sci & Resources, Xian 710054, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Jia, Lihui,Mao, Jingwen,Liu, Peng,et al. Crust-mantle interaction during subduction zone processes: Insight from late Mesozoic I-type granites in eastern Guangdong, SE China[J]. JOURNAL OF ASIAN EARTH SCIENCES,2020,192:18.
APA Jia, Lihui,Mao, Jingwen,Liu, Peng,&Yu, Miao.(2020).Crust-mantle interaction during subduction zone processes: Insight from late Mesozoic I-type granites in eastern Guangdong, SE China.JOURNAL OF ASIAN EARTH SCIENCES,192,18.
MLA Jia, Lihui,et al."Crust-mantle interaction during subduction zone processes: Insight from late Mesozoic I-type granites in eastern Guangdong, SE China".JOURNAL OF ASIAN EARTH SCIENCES 192(2020):18.

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来源：地质与地球物理研究所

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