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Genesis of early cretaceous leucogranites in the Central Sanandaj-Sirjan zone, Iran: Reworking of Neoproterozoic metasedimentary rocks in an active continental margin
Shakerardakani, Farzaneh1,2; Li, Xian-Hua1,2,3; Neubauer, Franz4; Ling, Xiao-Xiao1,2; Li, Jiao1,2; Monfaredi, Behzad5; Wu, Li-Guang1,2,3
2020
Source PublicationLITHOS
ISSN0024-4937
Volume352Pages:17
AbstractNew U-Pb ages and geochemical and isotopic data from leucogranites within the central Sanandaj-Sirjan zone (SSZ) of the Zagros orogen in Iran enable an evaluation of a migrating magmatic system in response to subduction of Neo-Tethyan lithosphere. The Esfajerd leucogranites, from the Golpaygan region of the Muteh-Golpaygan metamorphic complex, are composed mainly of tourmaline and two-mica leucogranites and are characterized by strongly peraluminous compositions. SIMS U-Pb zircon ages indicate that these rocks were emplaced over a 7 Myr period between 138 and 131 Ma. In multi-element variation diagrams, all samples display pronounced negative Eu anomalies, enrichment in light rare-earth elements and large-ion lithophile elements, and depletion in high-field-strength elements, Sr, and Ba. The tourmaline and two-mica leucogranites record positive zircon epsilon Hf values of 1.7-5.6 and 23-8.9, respectively, suggesting a predominantly Neoproterozoic crustal source. Zircon Hf-O isotopic compositions, together with the whole-rock geochemical data, show that both leucogranite types were produced by muscovite dehydration melting of metasedimentary sources under fluid-absent conditions, followed by fractional crystallization of the parental melt. The relatively high delta O-18 values (8.68-1032%.) of the tourmaline leucogranites are consistent with their derivation from a psammite-dominated source, such as metagraywackes, whereas the wider range and higher maximum of the delta O-18 values (6.99-1232%.) of the two-mica leucogranites correspond to mixed pelitic-psammitic sources, with little or no input of mantle-derived material. We suggest that the leucogranites were formed by melting of metasedimentary rocks during a stage of flat-slab subduction initiated by plate reorganization. (C) 2019 Elsevier B.V. All rights reserved.
KeywordU-Pb zircon geochronology Hf-O isotopes Leucogranite Flat-slab subduction Sanandaj-Sirjan zone Iran
DOI10.1016/j.lithos.2019.105330
Funding OrganizationChinese 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
WOS KeywordZIRCON U-PB ; TRONDHJEMITE-GRANODIORITE TTG ; HF ISOTOPIC CONSTRAINTS ; ZAGROS OROGENIC BELT ; S-TYPE GRANITES ; CALC-ALKALINE ; GEOCHEMICAL CONSTRAINTS ; TECTONIC EVOLUTION ; OXYGEN ISOTOPES ; IGNEOUS ROCKS
Language英语
Funding ProjectChinese Academy of Sciences[XDB18030000] ; Chinese Academy of Sciences[QYZDY-SSW-DQC017]
Funding OrganizationChinese 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
WOS Research AreaGeochemistry & Geophysics ; Mineralogy
WOS SubjectGeochemistry & Geophysics ; Mineralogy
WOS IDWOS:000515201500032
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95614
Collection岩石圈演化国家重点实验室
Corresponding AuthorShakerardakani, Farzaneh; Li, Xian-Hua
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
4.Paris Lodron Univ Salzburg, Dept Geog & Geol, Hellbrunner Str 34, A-5020 Salzburg, Austria
5.Karl Franzens Univ Graz, NAWI Graz Geoctr, Dept Petrol & Geochem, Univ Pl 2, A-8010 Graz, Austria
First Author AffilicationState Key Laboratory of Lithospheric Evolution
Corresponding Author AffilicationState Key Laboratory of Lithospheric Evolution
Recommended Citation
GB/T 7714
Shakerardakani, Farzaneh,Li, Xian-Hua,Neubauer, Franz,et al. Genesis of early cretaceous leucogranites in the Central Sanandaj-Sirjan zone, Iran: Reworking of Neoproterozoic metasedimentary rocks in an active continental margin[J]. LITHOS,2020,352:17.
APA Shakerardakani, Farzaneh.,Li, Xian-Hua.,Neubauer, Franz.,Ling, Xiao-Xiao.,Li, Jiao.,...&Wu, Li-Guang.(2020).Genesis of early cretaceous leucogranites in the Central Sanandaj-Sirjan zone, Iran: Reworking of Neoproterozoic metasedimentary rocks in an active continental margin.LITHOS,352,17.
MLA Shakerardakani, Farzaneh,et al."Genesis of early cretaceous leucogranites in the Central Sanandaj-Sirjan zone, Iran: Reworking of Neoproterozoic metasedimentary rocks in an active continental margin".LITHOS 352(2020):17.
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