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  2. 地质与地球物理研究所
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  4. 岩石圈演化国家重点实验室
Zircon U-Th-Pb-Hf isotopes of the basement rocks in northeastern Cathaysia block, South China: Implications for Phanerozoic multiple metamorphic reworking of a Paleoproterozoic terrane

文献类型：期刊论文

作者Zhao, Lei1,2; Zhou, Xiwen2; Zhai, Mingguo1,3; Santosh, M.4,5; Geng, Yuansheng2
刊名GONDWANA RESEARCH
出版日期2015-08-01
卷号28期号:1页码:246-261
关键词Zircon U-Pb geochronology Lu-Hf isotopes Paleoproterozoic basement Phanerozoic reworking Cathaysia block South China
DOI10.1016/j.gr.2014.03.019
文献子类Article
英文摘要The Cathaysia block records a complex tectonic history, the understanding of which is central to the debate on the evolution of the South China Block and its position in various supercontinent assemblies. Here we investigate two key formations from this block, the Mayuan Group in the northern Fujian Province, northeastern Cathaysia block and its equivalent the Badu Group in southwestern Zhejiang Province. Previous studies traced the Paleoproterozoic records from the Badu Group whereas a Neoproterozoic age was proposed for the Mayuan Group. The rocks sampled in this study from both groups show similar mineral assemblages of garnet + sillimanite + biotite + plagioclase + quartz +/- K-feldspar +/- muscovite +/- graphite as well as high contents of SiO2 and Al2O3, typical of amphibolite- to granulite-facies metapelitic rocks. Zircon U-Pb data yield two discordia intercept ages of similar to 1990 Ma and similar to 2450 Ma from one sample and discordia intercept ages of similar to 3.5 Ga, 2.5 Ga, 1.86 Ga and 233 Ma from another in the Badu Group. Zircons in two samples from the Mayuan group yield intercept ages of 1859 Ma and 249 Ma in one sample and similar to 2.6 Ga, 1.87 Ga, 257 Ma and a weighted mean Pb-206/U-238 age of 248 Ma in the other. The ca. 1.86-1.87 Ga and 230-250 Ma ages are interpreted to represent the time of metamorphic reworking because zircon grains of these ages tend to have low Th/U ratios, flat HREE patterns and unzoned internal texture as revealed by cathodoluminescene (CL) images. These results confirm that the Badu Group is a Paleoproterozoic lithostratigraphic unit and also suggest that at least part, if not all, of the Mayuan Group is Paleoproterozoic.
WOS关键词GA CONTINENTAL-CRUST ; FLAT-SLAB SUBDUCTION ; BACK-ARC BASIN ; LU-HF ; JIANGNAN OROGEN ; VOLCANIC-ROCKS ; TECTONIC EVOLUTION ; TRACE-ELEMENTS ; SOUTHWESTERN ZHEJIANG ; GEOCHEMICAL EVIDENCE
WOS研究方向Geology
语种英语
WOS记录号WOS:000356743000015
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)
源URL[http://ir.iggcas.ac.cn/handle/132A11/62353]  
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, 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. Zircon U-Th-Pb-Hf isotopes of the basement rocks in northeastern Cathaysia block, South China: Implications for Phanerozoic multiple metamorphic reworking of a Paleoproterozoic terrane[J]. GONDWANA RESEARCH,2015,28(1):246-261.
APA Zhao, Lei,Zhou, Xiwen,Zhai, Mingguo,Santosh, M.,&Geng, Yuansheng.(2015).Zircon U-Th-Pb-Hf isotopes of the basement rocks in northeastern Cathaysia block, South China: Implications for Phanerozoic multiple metamorphic reworking of a Paleoproterozoic terrane.GONDWANA RESEARCH,28(1),246-261.
MLA Zhao, Lei,et al."Zircon U-Th-Pb-Hf isotopes of the basement rocks in northeastern Cathaysia block, South China: Implications for Phanerozoic multiple metamorphic reworking of a Paleoproterozoic terrane".GONDWANA RESEARCH 28.1(2015):246-261.

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来源：地质与地球物理研究所

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