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
Paleoproterozoic tectonic transition from collision to extension in the eastern Cathaysia Block, South China: Evidence from geochemistry, zircon U-Pb geochronology and Nd-Hf isotopes of a granite-charnockite suite in southwestern Zhejiang

文献类型：期刊论文

作者Zhao, Lei1,2; Zhou, Xiwen2; Zhai, Mingguo1,3; Santosh, M.4,5; Ma, Xudong3; Shan, Houxiang1; Cui, Xiahong1
刊名LITHOS
出版日期2014
卷号184页码:259-280
关键词Paleoproterozoic granite-chamockite suite Geochemistry Zircon U-Pb geochronology Hf isotope Cathaysia Block
ISSN号0024-4937
文献子类Article
英文摘要The Badu complex and associated Paleoproterozoic granitoids are among the oldest known rocks in the Cathaysia Block in South China. The Paleoproterozoic units of the Badu complex are dominantly composed of metapelitic rocks and meta-greywackes. Here we report LA-SS-ICP-MS (laser ablation-split-stream inductively coupled plasma-mass spectrometry) zircon U-Pb data from a newly discovered garnet-bearing granite which show an emplacement age of 1929 +/- 15 Ma and metamorphism at 1872 +/- 34 Ma. We also report U-Pb ages of 1886 +/- 16 Ma, 1858 +/- 7 Ma, 1848 +/- 11 Ma from a gneissic granodiorite, and two chamockites respectively. The garnet-bearing granite is peraluminous with A/CNK range from 1.1 to 1.3. The rock shows relatively high Si0(2), K(2)0 and Rb contents, and low total REE, Sr, CaO and ferromagnesian components, typical of leucogranites. The whole rock Nd two-stage model age(T-Dm2(Nd)) of this rock is ca.2.7 Ga, zircon Hf crustal model ages(Tgm(Hf)) peak at about 2.7 Ga, and abundant inherited zircons occur with U-Pb ages in the range of 2044 to 2803 Ma. Evidences from zircon U-Pb age and Hf isotope compositions, whole rock Nd isotopes and whole rock major and trace elements suggest a metasedimentary protolith, and that the garnet-bearing granite (leucogranite) was derived by partial melting in a thickened crust at about 1.93 Ga. The gneissic granodiorite and chamockites show indistinguishable major and trace element features, as well as zircon Hf and whole rock Nd isotope compositions, indicating that they were generated from the same source rocks. The gneissic granodiorite and charnocldtes are ferroan, calc-alkalic and metaluminous with A/CNK range from 0.80 to 0.98. They display relatively low Si02 contents and Ga/Alratios, suggesting their A-type affinity. Their zircon Tgm(Hf) age-peak is 2.9 Ga and whole rock TDm2(Nd) ages range from 2.8 to 2.9 Ga. These high temperature rocks were generated possibly through the partial melting of ancient amphibolites (2.9 Ga), with heat input from astheno-sphere upwelling and magmatic underplating in an extensional setting at about 1.85-1.88 Ga. Combined with data from previous studies, we suggest three episodes of major crustal growth in this region at 1.8-1.9 Ga, similar to 2.7 Ga and similar to 2.9 Ga. During the 1.8-1.9 Ga event, extensive reworking also took place. From the 1.93 Ga syn-collision leucogranite (garnet-bearing granite), the 1.88-1.85 Ga post-collision A-type granites and charnockites (the granite-charnockite suite), and the1.85-1.77 Ga intraplate basaltic rocks (Li 1997 and Xiang et al. 2008) in the region, a Paleoproterozoic orogenic cycle can be deciphered in the Cathaysia Block. The rapid transition of tectonic regime from collision to post-collisional extension can be correlated to the assembly of the supercontinent Columbia. (C) 2013 Elsevier B.V. All rights reserved.
WOS关键词A-TYPE GRANITES ; IONIZATION MASS-SPECTROMETRY ; HIGH-GRADE TERRAINS ; EPISODIC CONTINENTAL GROWTH ; GARNET REE DISTRIBUTION ; LU-HF ; SM-ND ; TRACE-ELEMENT ; GEOLOGICAL SAMPLES ; CRUSTAL EVOLUTION
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000330815000015
出版者ELSEVIER SCIENCE BV
资助机构National Nature Science Foundation of China(41030316 ; National Nature Science Foundation of China(41030316 ; National Nature Science Foundation of China(41030316 ; National Nature Science Foundation of China(41030316 ; China Geological Survey(1212010611702 ; China Geological Survey(1212010611702 ; China Geological Survey(1212010611702 ; China Geological Survey(1212010611702 ; 41210003 ; 41210003 ; 41210003 ; 41210003 ; 1212010811048 ; 1212010811048 ; 1212010811048 ; 1212010811048 ; 40872123) ; 40872123) ; 40872123) ; 40872123) ; 1212011121062) ; 1212011121062) ; 1212011121062) ; 1212011121062) ; National Nature Science Foundation of China(41030316 ; National Nature Science Foundation of China(41030316 ; National Nature Science Foundation of China(41030316 ; National Nature Science Foundation of China(41030316 ; China Geological Survey(1212010611702 ; China Geological Survey(1212010611702 ; China Geological Survey(1212010611702 ; China Geological Survey(1212010611702 ; 41210003 ; 41210003 ; 41210003 ; 41210003 ; 1212010811048 ; 1212010811048 ; 1212010811048 ; 1212010811048 ; 40872123) ; 40872123) ; 40872123) ; 40872123) ; 1212011121062) ; 1212011121062) ; 1212011121062) ; 1212011121062) ; National Nature Science Foundation of China(41030316 ; National Nature Science Foundation of China(41030316 ; National Nature Science Foundation of China(41030316 ; National Nature Science Foundation of China(41030316 ; China Geological Survey(1212010611702 ; China Geological Survey(1212010611702 ; China Geological Survey(1212010611702 ; China Geological Survey(1212010611702 ; 41210003 ; 41210003 ; 41210003 ; 41210003 ; 1212010811048 ; 1212010811048 ; 1212010811048 ; 1212010811048 ; 40872123) ; 40872123) ; 40872123) ; 40872123) ; 1212011121062) ; 1212011121062) ; 1212011121062) ; 1212011121062) ; National Nature Science Foundation of China(41030316 ; National Nature Science Foundation of China(41030316 ; National Nature Science Foundation of China(41030316 ; National Nature Science Foundation of China(41030316 ; China Geological Survey(1212010611702 ; China Geological Survey(1212010611702 ; China Geological Survey(1212010611702 ; China Geological Survey(1212010611702 ; 41210003 ; 41210003 ; 41210003 ; 41210003 ; 1212010811048 ; 1212010811048 ; 1212010811048 ; 1212010811048 ; 40872123) ; 40872123) ; 40872123) ; 40872123) ; 1212011121062) ; 1212011121062) ; 1212011121062) ; 1212011121062)
源URL[http://ir.iggcas.ac.cn/handle/132A11/85388]  
专题中国科学院地质与地球物理研究所
通讯作者Zhao, Lei
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
4.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
5.Kochi Univ, Fac Sci, Kochi 7808520, Japan
推荐引用方式
GB/T 7714		 Zhao, Lei,Zhou, Xiwen,Zhai, Mingguo,et al. Paleoproterozoic tectonic transition from collision to extension in the eastern Cathaysia Block, South China: Evidence from geochemistry, zircon U-Pb geochronology and Nd-Hf isotopes of a granite-charnockite suite in southwestern Zhejiang[J]. LITHOS,2014,184:259-280.
APA Zhao, Lei.,Zhou, Xiwen.,Zhai, Mingguo.,Santosh, M..,Ma, Xudong.,...&Cui, Xiahong.(2014).Paleoproterozoic tectonic transition from collision to extension in the eastern Cathaysia Block, South China: Evidence from geochemistry, zircon U-Pb geochronology and Nd-Hf isotopes of a granite-charnockite suite in southwestern Zhejiang.LITHOS,184,259-280.
MLA Zhao, Lei,et al."Paleoproterozoic tectonic transition from collision to extension in the eastern Cathaysia Block, South China: Evidence from geochemistry, zircon U-Pb geochronology and Nd-Hf isotopes of a granite-charnockite suite in southwestern Zhejiang".LITHOS 184(2014):259-280.

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。