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The evolution of the Arabian-Nubian Shield and survival of its zircon U-Pb-Hf-O isotopic signature: A tale from the Urn Had Conglomerate, central Eastern Desert, Egypt
Abd El-Rahman, Yasser1,2; Abu Anbar, Mohamed3; Li, Xian-Hua1,4; Li, Jiao1; Ling, Xiao-Xiao1; Wu, Li-Guang1,4; Masoud, Ahmed E.3
2019
Source PublicationPRECAMBRIAN RESEARCH
ISSN0301-9268
Volume320Pages:46-62
AbstractIn this study, we present in situ U-Pb, Hf and O isotopic analyses of detrital zircon grains from the Urn Had Conglomerate from the Wadi Hammamat area in the central Eastern Desert of Egypt. The youngest detrital age population is 625 Ma, which gives an estimate to the maximum depositional age of the Urn Had Conglomerate. Based on their Hf isotopic signature and U-Pb ages, detrital zircons fall into two distinct groups: a 625-680 Ma group and a 720-840 Ma group, with minor early Tonian-Stenian and Paleoproterozoic-Archean populations. These groups are consistent with derivation from local sources in the central Eastern Desert of Egypt. The 720-840 Ma group is characterized by exclusively positive epsilon(Hf(t)) values and it reflects the main juvenile Tonian intra-oceanic island arc stage characterizing the formation of the Arabian-Nubian Shield. On the contrary, epsilon(Hf(t)) values of the 625-680 Ma zircon group range between 17.5 and +12.8, which indicates involvement of Archean-Paleoproterozoic crust during the Cryogenian-Ediacaran magmatism associated with the accretion and assembly of the arc materials. The transition from juvenile intra-oceanic island arc stage to mixed juvenile magma and older crustal materials during the arc assembly stage in the central Eastern Desert is supported by the increase in delta O-18 values of detrital zircons from dominant mantle-like values in the Tonian to higher values in the Cryogenian-Ediacaran group. A wide variation in the epsilon(Hf(t)) values (-25.8 to +10) is recorded also in the early Tonian-Stenian population, which results in the double plunge U-Pb-Hf patterns of the detrital zircons. This pattern is similar to the Nile sediments and to the Paleozoic and Mesozoic Nubian sandstone, which may indicate substantial recycling of ANS crustal material by these sediments and survival of its original zircon U-Pb-Hf-O signature despite repeated recycling episodes.
KeywordZircon Hf-O isotope U-Pb age Provenance Arabian-Nubian Shield Nile sediments
DOI10.1016/j.precamres.2018.10.011
Funding OrganizationPIFI ; PIFI ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; PIFI ; PIFI ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; PIFI ; PIFI ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; PIFI ; PIFI ; Chinese Academy of Sciences ; Chinese Academy of Sciences
WOS KeywordPRECAMBRIAN HAMMAMAT GROUP ; PAN-AFRICAN CRUST ; DETRITAL-ZIRCON ; LU-HF ; NEOPROTEROZOIC EVOLUTION ; METAMORPHIC COMPLEX ; TECTONIC EVOLUTION ; CONTINENTAL-CRUST ; AGE CONSTRAINTS ; SINGLE ZIRCONS
Language英语
Funding ProjectPIFI ; Chinese Academy of Sciences[XDB18030300] ; Chinese Academy of Sciences[QYZDY-SSW-DQC017]
Funding OrganizationPIFI ; PIFI ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; PIFI ; PIFI ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; PIFI ; PIFI ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; PIFI ; PIFI ; Chinese Academy of Sciences ; Chinese Academy of Sciences
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000456899600004
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90543
Collection岩石圈演化国家重点实验室
Corresponding AuthorAbd El-Rahman, Yasser; Li, Xian-Hua
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Cairo Univ, Fac Sci, Geol Dept, Giza 12613, Egypt
3.Tanta Univ, Fac Sci, Geol Dept, Tanta 31527, Egypt
4.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Abd El-Rahman, Yasser,Abu Anbar, Mohamed,Li, Xian-Hua,et al. The evolution of the Arabian-Nubian Shield and survival of its zircon U-Pb-Hf-O isotopic signature: A tale from the Urn Had Conglomerate, central Eastern Desert, Egypt[J]. PRECAMBRIAN RESEARCH,2019,320:46-62.
APA Abd El-Rahman, Yasser.,Abu Anbar, Mohamed.,Li, Xian-Hua.,Li, Jiao.,Ling, Xiao-Xiao.,...&Masoud, Ahmed E..(2019).The evolution of the Arabian-Nubian Shield and survival of its zircon U-Pb-Hf-O isotopic signature: A tale from the Urn Had Conglomerate, central Eastern Desert, Egypt.PRECAMBRIAN RESEARCH,320,46-62.
MLA Abd El-Rahman, Yasser,et al."The evolution of the Arabian-Nubian Shield and survival of its zircon U-Pb-Hf-O isotopic signature: A tale from the Urn Had Conglomerate, central Eastern Desert, Egypt".PRECAMBRIAN RESEARCH 320(2019):46-62.
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