Intraplate crustal remelting as the genesis of Jurassic high-K granites in the coastal region of the Guangdong Province, SE China
文献类型：期刊论文
| 作者 | Huang, Hui-Qing1,2; Li, Xian-Hua3; Li, Zheng-Xiang2; Li, Wu-Xian1 |
| 刊名 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 出版日期 | 2013-09-25 |
| 卷号 | 74页码:280-302 |
| 关键词 | High-K granite Calc-alkaline Zircon Hf-O isotopes Southeastern China |
| DOI | 10.1016/j.jseaes.2012.09.009 |
| 文献子类 | Article |
| 英文摘要 | The origin and tectonic significance of high-K granites (>3 wt% K2O at 70 wt% SiO2), calc-alkaline l-type granites in particular, remain controversial. This paper takes granitic plutons distributed in the coastal region of the Guangdong Province of southeastern China as examples to explore the genesis of such rocks. SIMS zircon U-Pb geochronological data show that the granites were emplaced at 166-159 Ma. These granites can be subdivided generally into two groups on the basis of integrated mineralogical, geochemical, whole-rock Sr-Nd isotopic and in situ zircon Hf-O isotopic studies. The group A granites (SiO2 = 64-72 wt%) are characterised by their common occurrence of amphibole (+/- titanite) and dominantly metaluminous feature (A/CNK = 0.85-1.03). They are high in K2O (3.5-7.0 wt%) and K2O/Na2O (>1), and have trace element concentrations (e.g., Nb, Y. Zr and Ga) similar to typical I-type granites in the Lachlan Fold Belt, southeastern Australia. Their whole-rock I-Sr (0.7057-0.7077) and epsilon Nd(t) (-6.46 to -3.13) are less evolved than many coeval granites in this region. As in situ zircon Hf-O isotopes show little evidence of magma mixing, these granites with low zircon delta O-18 (6.3-7.9 parts per thousand) and high epsilon Hf(t) (-5.9 to -0.2) could have been generated from melting of oxidised high-K basaltic rocks. The group B granites, emplaced to the east of group A granites, are dominantly weakly peraluminous (A/CNK = 1.00-1.05). They have higher SiO2 (70-76 wt%), less common or absence of amphibole, higher zircon delta O-18 (6.6-9.0 parts per thousand) and lower epsilon Hf(t) (-11.4 to -5.9) than the group A granites. Zircon Hf-O isotope data reveal that the group B granites contain higher percentage of supracrustal materials than those of the group A, but the variations of major and trace elements do not support an assimilation and fractional crystallization (AFC) model. Instead, the group B granites, with features transitional between typical I-type and S-type granites, were most likely formed in a region where there was physical juxtaposition between infracrustal metaluminous and supracrustal peraluminous source rocks. Thus, granites of both groups represent products of crustal reworking likely due to asthenosphere upwelling and/or underplating and intrusion of mafic magmas. The close association in time and space of these granites with OIB-like basaltic rocks and the secular compositional change of Jurassic basaltic rocks in the region suggest that these rocks probably formed in an intraplate extensional setting resulted from the delamination of a flat-subducted oceanic slab. (C) 2012 Elsevier Ltd. All rights reserved. |
| WOS关键词 | SLAB SUBDUCTION MODEL ; A-TYPE GRANITES ; U-PB ZIRCON ; SOUTH CHINA ; CALC-ALKALINE ; TECTONIC SIGNIFICANCE ; VOLCANIC-ROCKS ; FLAT-SLAB ; ISOTOPIC CONSTRAINTS ; ULTRAPOTASSIC ROCKS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000324663500021 |
| 资助机构 | Ministry of Science and Technology(2012CB416702) ; Ministry of Science and Technology(2012CB416702) ; Chinese Academy of Sciences(XDA08110400) ; Chinese Academy of Sciences(XDA08110400) ; Chinese National Natural Science Foundation(40728002) ; Chinese National Natural Science Foundation(40728002) ; Australian Research Council(DP110104799) ; Australian Research Council(DP110104799) ; Ministry of Science and Technology(2012CB416702) ; Ministry of Science and Technology(2012CB416702) ; Chinese Academy of Sciences(XDA08110400) ; Chinese Academy of Sciences(XDA08110400) ; Chinese National Natural Science Foundation(40728002) ; Chinese National Natural Science Foundation(40728002) ; Australian Research Council(DP110104799) ; Australian Research Council(DP110104799) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/62523]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Isotope Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Guangdong, Peoples R China 2.Curtin Univ, ARC Ctr Excellence Core Crust Fluid Syst CCFS, Inst Geosci Res TIGeR, Dept Appl Geol, Perth, WA 6845, Australia 3.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, Hui-Qing,Li, Xian-Hua,Li, Zheng-Xiang,et al. Intraplate crustal remelting as the genesis of Jurassic high-K granites in the coastal region of the Guangdong Province, SE China[J]. JOURNAL OF ASIAN EARTH SCIENCES,2013,74:280-302. |
| APA | Huang, Hui-Qing,Li, Xian-Hua,Li, Zheng-Xiang,&Li, Wu-Xian.(2013).Intraplate crustal remelting as the genesis of Jurassic high-K granites in the coastal region of the Guangdong Province, SE China.JOURNAL OF ASIAN EARTH SCIENCES,74,280-302. |
| MLA | Huang, Hui-Qing,et al."Intraplate crustal remelting as the genesis of Jurassic high-K granites in the coastal region of the Guangdong Province, SE China".JOURNAL OF ASIAN EARTH SCIENCES 74(2013):280-302. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。