中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
  4. 岩石圈演化国家重点实验室
Crustal basement controls granitoid magmatism, and implications for generation of continental crust in subduction zones: A Sr-Nd-Hf-O isotopic study from the Paleozoic Tongbai orogen, central China

文献类型：期刊论文

作者Wang, Hao1,2; Wu, Yuan-Bao2; Yang, Jin-Hui1; Qin, Zheng-Wei2; Duan, Rui-Chun3; Zhou, Lian2; Yang, Sai-Hong1
刊名LITHOS
出版日期2017-06-01
卷号282页码:298-315
关键词Sr-nd-hf-o Isotopes Continental Crust Granitoids Oceanic Arc Continental Arc Tongbai Orogen
ISSN号0024-4937
DOI10.1016/j.lithos.2017.03.014
文献子类Article
英文摘要Ascertaining the petrogenesis of granitoid rocks in subduction zones holds the key for understanding the processes of how continental crust is produced. The synchronous Taoyuan and Huanggang plutons occur in two different geological units of the Paleozoic Tongbai orogen of central China. They provide an optimal opportunity for a study to address the role of the crustal basement in generating voluminous granitoid magmatism in subduction zones. The Taoyuan and Huanggang plutons have identical U-Pb zircon crystallization ages of 440-444 Ma, which are temporally related to northward subduction of the Paleotethyan Ocean. The Taoyuan samples show high SiO2 (73.36-79.16%) and low Al2O3 (12.00-13.45%) contents, Mg numbers (20.6-38.2), and Sr/Y (2.04-10.1) and (La/Yb)(N) (2.34-7.32) ratios with negative Eu anomalies (Eu/Eu* = 0.33-0.93). They yielded positive epsilon(Nd)(t) (+3.0 to +6.7) and epsilon(Hf)(t) (+11.8 to +13.2) values, elevated initial Sr isotopic ratios (0.7040-0.7057) and relatively low zircon delta O-18 values of 4.62-5.39 parts per thousand. These suggest that they were produced through partial melting of hydrothermally altered lower crust of the accreted Erlangping oceanic arc. In contrast, the Huanggang samples exhibit variable whole-rock geochemical and isotopic compositions with SiO2 contents of 57.01-64.42 wt.%, initial Sr isotopic ratios of 0.7065-0.7078, and epsilon(Nd)(t) values of -5.7 to -9.4. Additionally, they have high zircon delta O-18 values of 7.57-8.45 parts per thousand and strongly negative zircon epsilon(Hf)(t) values of -14.4 to -10.5. They were suggested to have been mainly derived from ancient continental crust of the Kuanping crustal unit with the addition of 20-40% juvenile, mantle-derived material. Accordingly, the granitoids in both oceanic and continental arcs are likely to be mainly derived from intracrustal melting of their crustal basement. It is revealed by the Huanggang pluton that little net continental crust growth occurs in continental arcs, and addition of new volume of continental crust may be balanced by the loss of old mafic lower continental crust Continental growth was likely achieved through the accretion and subsequent differentiation of oceanic arcs, as manifested by the Taoyuan pluton. (C) 2017 Elsevier B.V. All rights reserved.
WOS关键词U-PB AGE ; NORTH QINLING TERRANE ; ULTRAHIGH-PRESSURE METAMORPHISM ; LACHLAN FOLD BELT ; COLLECTOR ICP-MS ; TECTONIC EVOLUTION ; OCEANIC-CRUST ; ISLAND-ARC ; GEOCHEMICAL CONSTRAINTS ; SOUTHEASTERN AUSTRALIA
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000401388100021
出版者ELSEVIER SCIENCE BV
资助机构Chinese 973 project(2015CB856106) ; Chinese 973 project(2015CB856106) ; National Natural Science Foundation of China(41503026 ; National Natural Science Foundation of China(41503026 ; Ministry of Education of China(B07039) ; Ministry of Education of China(B07039) ; 41273035 ; 41273035 ; 41173017 ; 41173017 ; 41521062) ; 41521062) ; Chinese 973 project(2015CB856106) ; Chinese 973 project(2015CB856106) ; National Natural Science Foundation of China(41503026 ; National Natural Science Foundation of China(41503026 ; Ministry of Education of China(B07039) ; Ministry of Education of China(B07039) ; 41273035 ; 41273035 ; 41173017 ; 41173017 ; 41521062) ; 41521062) ; Chinese 973 project(2015CB856106) ; Chinese 973 project(2015CB856106) ; National Natural Science Foundation of China(41503026 ; National Natural Science Foundation of China(41503026 ; Ministry of Education of China(B07039) ; Ministry of Education of China(B07039) ; 41273035 ; 41273035 ; 41173017 ; 41173017 ; 41521062) ; 41521062) ; Chinese 973 project(2015CB856106) ; Chinese 973 project(2015CB856106) ; National Natural Science Foundation of China(41503026 ; National Natural Science Foundation of China(41503026 ; Ministry of Education of China(B07039) ; Ministry of Education of China(B07039) ; 41273035 ; 41273035 ; 41173017 ; 41173017 ; 41521062) ; 41521062)
源URL[http://ir.iggcas.ac.cn/handle/132A11/52928]  
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Wang, Hao; Wu, Yuan-Bao
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.China Univ Geosci, Ctr Global Tecton, State Key Lab Geol Proc & Mineral Resources, Fac Earth Sci, Wuhan 430074, Peoples R China
3.China Geol Survey, Wuhan Ctr Geol Survey, Isotop Geochem Lab, Wuhan 430205, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Hao,Wu, Yuan-Bao,Yang, Jin-Hui,et al. Crustal basement controls granitoid magmatism, and implications for generation of continental crust in subduction zones: A Sr-Nd-Hf-O isotopic study from the Paleozoic Tongbai orogen, central China[J]. LITHOS,2017,282:298-315.
APA Wang, Hao.,Wu, Yuan-Bao.,Yang, Jin-Hui.,Qin, Zheng-Wei.,Duan, Rui-Chun.,...&Yang, Sai-Hong.(2017).Crustal basement controls granitoid magmatism, and implications for generation of continental crust in subduction zones: A Sr-Nd-Hf-O isotopic study from the Paleozoic Tongbai orogen, central China.LITHOS,282,298-315.
MLA Wang, Hao,et al."Crustal basement controls granitoid magmatism, and implications for generation of continental crust in subduction zones: A Sr-Nd-Hf-O isotopic study from the Paleozoic Tongbai orogen, central China".LITHOS 282(2017):298-315.

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。