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Old Continental Crust Underlying Juvenile Oceanic Arc: Evidence From Northern Arabian-Nubian Shield, Egypt

文献类型：期刊论文

作者Li, Xian-Hua1,2; Abd El-Rahman, Yasser1,3; Abu Anbar, Mohamed4; Li, Jiao1; Ling, Xiao-Xiao1; Wu, Li-Guang1,2; Masoud, Ahmed E.4
刊名GEOPHYSICAL RESEARCH LETTERS
出版日期2018-04-16
卷号45期号:7页码:3001-3008
ISSN号0094-8276
DOI10.1002/2018GL077121
英文摘要The Neoproterozoic Arabian-Nubian Shield (ANS) is the best preserved and the largest exposed Neoproterozoic juvenile crust on Earth. While the lithology and early Sr and Nd isotopic data demonstrate that the ANS crust is overwhelmingly juvenile, pre-ANS old zircon crystals have been increasingly recognized in the ANS igneous and sedimentary rocks, casting doubt on the "juvenility" of the ANS crust. In order to understand the origin of the old continental materials in the ANS and its roles in generation of juvenile oceanic arcs, we carry out for the first time an integrated in situ analysis of zircon U-Pb age and Hf-O isotopes for greywacke and felsic volcanic cobble samples from the Atud Formation in the Eastern Desert of northwestern part of the ANS. Our data indicate that the Atud Formation was deposited between ca. 720 and 700 Ma, concurrent with the production of oceanic arcs in the ANS. The Atud greywacke was derived from the erosion of a proximal arc terrane that contains numerous old continental crust materials. We identify for the first time a 755-Ma felsic volcanic cobble from the Atud Formation that is derived from old continental materials during juvenile crust production, suggesting presence of an old continental crust substrate that underlies the ANS. Our work demonstrates that reworking of old continental crust played important roles in generation of oceanic arcs in the northwestern ANS that is likely much less juvenile than previously thought. Thus, the crustal growth rates calculated based on estimates of temporal island arc development need to be revised.
WOS关键词EAST-AFRICAN OROGEN ; U-PB ; GRANITOID GNEISSES ; SAUDI-ARABIA ; ISLAND ARCS ; ZIRCON ; EVOLUTION ; DESERT ; GROWTH ; CONSTRAINTS
资助项目Chinese Academy of Sciences[XDB18030000] ; Chinese Academy of Sciences[QYZDY-SSW-DQC017]
WOS研究方向Geology
语种英语
WOS记录号WOS:000435743400015
出版者AMER GEOPHYSICAL UNION
资助机构Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/88185]  
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Li, Xian-Hua
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
3.Cairo Univ, Geol Dept, Fac Sci, Giza, Egypt
4.Tanta Univ, Geol Dept, Fac Sci, Tanta, Egypt
推荐引用方式
GB/T 7714		 Li, Xian-Hua,Abd El-Rahman, Yasser,Abu Anbar, Mohamed,et al. Old Continental Crust Underlying Juvenile Oceanic Arc: Evidence From Northern Arabian-Nubian Shield, Egypt[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(7):3001-3008.
APA Li, Xian-Hua.,Abd El-Rahman, Yasser.,Abu Anbar, Mohamed.,Li, Jiao.,Ling, Xiao-Xiao.,...&Masoud, Ahmed E..(2018).Old Continental Crust Underlying Juvenile Oceanic Arc: Evidence From Northern Arabian-Nubian Shield, Egypt.GEOPHYSICAL RESEARCH LETTERS,45(7),3001-3008.
MLA Li, Xian-Hua,et al."Old Continental Crust Underlying Juvenile Oceanic Arc: Evidence From Northern Arabian-Nubian Shield, Egypt".GEOPHYSICAL RESEARCH LETTERS 45.7(2018):3001-3008.

入库方式： OAI收割

来源：地质与地球物理研究所

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