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Zircon U-Pb age, whole-rock geochemistry and Nd-Sr-Pb isotope constraints on petrogenesis of the Eocene Zajkan gabbro-monzogranite intrusion, Tarom-Hashtjin magmatic belt, NW Iran
Mokhtari, M. A. A.1; Kouhestani, H.1; Qin, K. Z.2,3
2022-05-16
Source PublicationAUSTRALIAN JOURNAL OF EARTH SCIENCES
ISSN0812-0099
Pages18
AbstractThe late Eocene high-K to shoshonitic Zajkan intrusion, situated in the Tarorn-Hashtjin magmatic belt (THMB), NW Iran, ranges in composition from gabbro to pyroxene quartz monzodiorite, pyroxene quartz monzonite and monzogranite, and is classified as an i-type metaluminous granitoid. On the primitive mantle-normalised spider diagram, these rocks demonstrate negative high field strength element (HFSE) anomalies, large-ion lithophile element (LILE) enrichment, and positive Pb anomaly, indicating a subduction-related signature. Furthermore, the granitoids are characterised by coherent chondrite-normalised rare earth element patterns with high light rare earth elements/heavy rare earth elements (LREE/HREE) and moderate to weakly negative Eu anomalies (Eu/Eu* = 0.6-0.86). LA-ICP-MS zircon U-Pb datirtg . demonstrates that the Zajkan intrusion crystallised at ca 36.5 Ma. Relatively low to moderate Sr-87/Sr-86 ratios (0.7046-0.7061) and positive epsilon Nd-(t) values (1.52-1.88) of the Zajkan samples are consistent with an enriched lithospheric mantle source that was metasomatised by an earlier subducted slab. Geochemical features show that the parental magma of the Zajkan intrusion likely resulted from a partial melting of metasomatised amphibolebearing mantle source. Sr-Nd isotope modelling is consistent with the Zajkan intrusion formed from a mix of similar to 80% of a mantle-derived magma and similar to 20% of a juvenile lower crustal-derived magma. Partial melting of the metasomatised mantle may have resulted from late Eocene lithospheric thinning and hot asthenospheric upwelling through slab roll-back or lithospheric delamination.
Keywordgabbro to granitoid series U-P zircon dating geochemistry Sr-Nd isotopes Zajkan intrusion Tarom-Hashtjin Alborz magmatic belt NW Iran
DOI10.1080/08120099.2022.2068648
Funding OrganizationSecond Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; Office of Vice Chancellor for Research and Technology, University of Zanjan, Iran ; Office of Vice Chancellor for Research and Technology, University of Zanjan, Iran ; Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; Office of Vice Chancellor for Research and Technology, University of Zanjan, Iran ; Office of Vice Chancellor for Research and Technology, University of Zanjan, Iran ; Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; Office of Vice Chancellor for Research and Technology, University of Zanjan, Iran ; Office of Vice Chancellor for Research and Technology, University of Zanjan, Iran ; Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; Office of Vice Chancellor for Research and Technology, University of Zanjan, Iran ; Office of Vice Chancellor for Research and Technology, University of Zanjan, Iran
WOS KeywordARABIA-EURASIA COLLISION ; A-TYPE GRANITOIDS ; PLUTONIC COMPLEX ; PORPHYRY CU ; POSTCOLLISIONAL MAGMATISM ; ALKALINE MAGMATISM ; ALBORZ MOUNTAINS ; VOLCANIC-ROCKS ; TRACE-ELEMENTS ; OROGENIC BELT
Language英语
Funding ProjectSecond Tibetan Plateau Scientific Expedition and Research[2019QZKK0806] ; Office of Vice Chancellor for Research and Technology, University of Zanjan, Iran
Funding OrganizationSecond Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; Office of Vice Chancellor for Research and Technology, University of Zanjan, Iran ; Office of Vice Chancellor for Research and Technology, University of Zanjan, Iran ; Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; Office of Vice Chancellor for Research and Technology, University of Zanjan, Iran ; Office of Vice Chancellor for Research and Technology, University of Zanjan, Iran ; Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; Office of Vice Chancellor for Research and Technology, University of Zanjan, Iran ; Office of Vice Chancellor for Research and Technology, University of Zanjan, Iran ; Second Tibetan Plateau Scientific Expedition and Research ; Second Tibetan Plateau Scientific Expedition and Research ; Office of Vice Chancellor for Research and Technology, University of Zanjan, Iran ; Office of Vice Chancellor for Research and Technology, University of Zanjan, Iran
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000796469300001
PublisherTAYLOR & FRANCIS LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/105930
Collection矿产资源研究院重点实验室
Corresponding AuthorMokhtari, M. A. A.
Affiliation1.Univ Zanjan, Fac Sci, Dept Geol, Zanjan, Iran
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Mokhtari, M. A. A.,Kouhestani, H.,Qin, K. Z.. Zircon U-Pb age, whole-rock geochemistry and Nd-Sr-Pb isotope constraints on petrogenesis of the Eocene Zajkan gabbro-monzogranite intrusion, Tarom-Hashtjin magmatic belt, NW Iran[J]. AUSTRALIAN JOURNAL OF EARTH SCIENCES,2022:18.
APA Mokhtari, M. A. A.,Kouhestani, H.,&Qin, K. Z..(2022).Zircon U-Pb age, whole-rock geochemistry and Nd-Sr-Pb isotope constraints on petrogenesis of the Eocene Zajkan gabbro-monzogranite intrusion, Tarom-Hashtjin magmatic belt, NW Iran.AUSTRALIAN JOURNAL OF EARTH SCIENCES,18.
MLA Mokhtari, M. A. A.,et al."Zircon U-Pb age, whole-rock geochemistry and Nd-Sr-Pb isotope constraints on petrogenesis of the Eocene Zajkan gabbro-monzogranite intrusion, Tarom-Hashtjin magmatic belt, NW Iran".AUSTRALIAN JOURNAL OF EARTH SCIENCES (2022):18.
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