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U-Pb geochronology and geochemistry of the Torud igneous rocks: Implications for post-collision Eocene magmatism in northeast Iran

文献类型：期刊论文

作者Jafari, Morteza Khalatbari3; Babaie, Hassan A.2; Ao, Songjian1; Xiao, Wenjiao1,4
刊名JOURNAL OF GEODYNAMICS
出版日期2022-11-01
卷号153-154页码:21
ISSN号0264-3707
关键词Iran Subduction Tethys Post-collision volcanism Subvolcanic Inherited zircon
DOI10.1016/j.jog.2022.101942
英文摘要New geochemical and U-Pb isotopic data from the Torud volcanic and subvolcanic rocks and their associated dikes exposed along the southern margin of the Sabzevar-Torud zone provide new evidence for Early-Middle Eocene, post-collision magmatism in northeast Iran. The 52-46 Ma (late Ypresian-Lutetian) U-Pb age interval of zircons separated from these rocks confirm the paleontological age of nummulite-bearing limestone in-terlayers. Inherited zircons separated from these igneous rocks have a much wider range of U-Pb ages that include Archean, Paleoproterozoic, Mesoproterozoic, Carboniferous, Permian, Triassic, Middle Jurassic, and Late Cretaceous. Most volcanics and subvolcanic rocks display high-K calcalkaline and shoshonitic trends. Distinct crystal fractionation patterns of the volcanic and subvolcanic rocks suggest magmatic differentiation in separate magma chambers. The studied rocks, depleted in the HFSE and enriched in the LILE, display nearly homogeneous isotopic Sr (0.7039-0.7055) and Nd (0.5126-0.5129) ratios and positive epsilon Nd values (0.08-0.56) indicating partial melting from an enriched lithospheric mantle source that was slightly contaminated with crustal material. Fluids, especially those released from the subducted slab, affected the composition of the source for the studied rocks. The magmatism occurred in the Torud area after the Late Cretaceous-Paleocene collision of the Central Iran microcontinent and Binalud-Kopeh-Dagh blocks and the Early-Middle Eocene break-off of the subducted slab.
WOS关键词VOLCANIC-ROCKS ; TRACE-ELEMENT ; GEODYNAMIC EVOLUTION ; NE TURKEY ; LU-HF ; ISOTOPIC CONSTRAINTS ; LITHOSPHERIC MANTLE ; TECTONIC EVOLUTION ; MASS-SPECTROMETRY ; EASTERN PONTIDES
资助项目National Natural Science Foundation of China[41822204] ; National Natural Science Foundation of China[41888101]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:000892613000001
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/107636]  
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Jafari, Morteza Khalatbari
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Georgia State Univ, Dept Geosci, Atlanta, GA USA
3.Res Inst Earth Sci, Azadi Sq,Meraj Ave, Tehran, Iran
4.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Jafari, Morteza Khalatbari,Babaie, Hassan A.,Ao, Songjian,et al. U-Pb geochronology and geochemistry of the Torud igneous rocks: Implications for post-collision Eocene magmatism in northeast Iran[J]. JOURNAL OF GEODYNAMICS,2022,153-154:21.
APA Jafari, Morteza Khalatbari,Babaie, Hassan A.,Ao, Songjian,&Xiao, Wenjiao.(2022).U-Pb geochronology and geochemistry of the Torud igneous rocks: Implications for post-collision Eocene magmatism in northeast Iran.JOURNAL OF GEODYNAMICS,153-154,21.
MLA Jafari, Morteza Khalatbari,et al."U-Pb geochronology and geochemistry of the Torud igneous rocks: Implications for post-collision Eocene magmatism in northeast Iran".JOURNAL OF GEODYNAMICS 153-154(2022):21.

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来源：地质与地球物理研究所

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