Subduction-related mafic to felsic magmatism in the Malayer–Boroujerd plutonic complex, western Iran

Deevsalar, Reza; Shinjo, Ryuichi; Liégeois, Jean Paul; Valizadeh, M V; Ahmadian, Jamshid; Yeganehfar, Hadi; Murata, Mamoru; Neill, Iain

doi:10.1007/s00015-017-0287-y

Cited by 16 publications

(6 citation statements)

References 115 publications

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“…At a later stage of the system's development (~10 Myr), the subducted continent reaches depths of 100 km where its upper crust is also involved in melting. Similar temporal transitions of subduction-related magmatism from mafic with mantle origin to felsic with crustal origin geochemical signature are reported in the Malayer-Boroujerd plutonic complex in western Iran (Deevsalar et al, 2018).…”

Section: Resultssupporting

confidence: 74%

Plume‐Induced Breakup of a Subducting Plate: Microcontinent Formation Without Cessation of the Subduction Process

Koptev

Beniest

Gerya

et al. 2019

Geophysical Research Letters

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Separation of microcontinents is explained by a ridge jump toward the passive margin as a possible consequence of plume‐induced rheological weakening, ultimately leading to breakup followed by accretion of the oceanic crust along a new spreading center. In contrast to such a purely extensional case, the separation of continental microblocks from the main body of the African plate during its continuous northward motion and subduction under Eurasia is still poorly understood. Our numerical experiments show the thermal and buoyancy effects of mantle plume impingement on the bottom of the continental part of a subducting plate are sufficient to induce separation of an isolated microcontinental block from the main subducting continent, even during induced plate motion necessary for uninterrupted oceanic and continental subduction. Subsequent continental accretion occurs by decoupling upper‐crustal nappes from the newly formed subducting microcontinent, which is in agreement with the Late Cretaceous‐Eocene evolution of the eastern Mediterranean.

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Section: Resultssupporting

confidence: 74%

Plume‐Induced Breakup of a Subducting Plate: Microcontinent Formation Without Cessation of the Subduction Process

Koptev

Beniest

Gerya

et al. 2019

Geophysical Research Letters

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“…Ca‐rich plagioclase and clinopyroxene, as well as hydrous minerals such as hornblende, are also reported from the Malayer–Boroujerd gabbros (Deevsalar et al., 2018), consistent with formation in a water‐rich environment such as a continental subduction zone. The formation of hydrous mineral phases such as phlogopite and amphibole is an important feature of subduction‐related mantle metasomatism (Beccaluva, Bianchini, Bonadiman, Siena, & Vaccaro, 2004).…”

Section: Constraints On Magma Sourcesmentioning

confidence: 73%

“…Moreover, diverse magma series including OIB‐type alkaline rocks are only reported from Taghiabad–Kangareh (e.g. Azizi et al., 2015), and the rocks of the Malayer–Boroujerd are mainly archetype calc‐alkaline (Deevsalar et al., 2018). In this comment, we echo the conclusion of previous studies that ‘the SSA was an Andean‐like continental margin during the Jurassic’.…”

mentioning

confidence: 99%

Comment on ‘Jurassic igneous rocks of the central Sanandaj–Sirjan zone (Iran) mark a propagating continental rift, not a magmatic arc’ by Azizi and Stern (Terra Nova, 31(5), 415‐423, 2019)

2020

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“…For instance, Annen et al (2006) established that the chemical diversity of arc‐related magma was familiarly linked with the subduction process that took place within the deep crust; whereas textural diversity was more generally described as the crystallization process at the shallow‐level of the crust. Deevsalar et al (2018) concluded that subduction‐related magmatism could attribute to mantle‐deep crust interplaying and shallow‐level intracrustal processes, and it began with the synchronous mantle melting and lower crustal anatexis. In this regard, common associations of mafic to felsic rocks probably provide significant insights into mantle and/or both deep and shallow intracrustal processes.…”

Section: Introductionmentioning

confidence: 99%

“…The age data are listed in Table S1 The subduction process, as one of the orogenic episodes, is an, if not the, most important principal event for the petrologicalgeochemical evolution of the continental crust. Extensive magmatic rocks are formed above the subduction zones, because the zones are the priority areas for generating magma or melt (Deevsalar et al, 2018;Kelemen et al, 2003). For instance, Annen et al (2006) established that the chemical diversity of arc-related magma was familiarly linked with the subduction process that took place within the deep crust; whereas textural diversity was more generally described as the crystallization process at the shallow-level of the crust.…”

Section: Introductionmentioning

confidence: 99%

Subduction‐related mafic to felsic magmatism in the Xiangpishan concentric calc‐alkaline complex, Northeast Tibetan Plateau

Zou

Deng

et al. 2022

Geological Journal

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The Xiangpishan complex in the Zongwulong‐Qinghainanshan Tectonic Belt, Northeast (NE) Tibetan Plateau, is a composite concentric pluton consisting of a felsic core (granodiorite) surrounded by quartz diorite in the middle to diorite and minor gabbro at the margin with locally less volume of monzogranite. Many dioritic enclaves are unevenly distributed within host granitoids. We evaluate the petrogenesis of the complex by geochemical, geochronological, and Hf isotopic data in tandem with regional data in the belt. The results show that felsic rocks were emplaced during the Late Permian (ca. 262–256 Ma); whilst gabbros yielded a younger age of ca. 249 Ma. As the hybrid phase from mixing between felsic and mafic magmas, enclaves and diorites have analogous ages (ca. 257–254 Ma) to both. Zircons from gabbro and enclaves are marked by higher εHf(t) value up to +1.82; whilst granodiorites have lower εHf(t) value of −5.48, consistent with hybrid diorites possessing intermediate εHf(t) values of −3.14 to 0.34. Furthermore, the quantitative calculation from Mass Balances Modelling suggests that the mass of mafic magma (ca. 67%–79%) is involved to achieve the hybridization. Geochemically, these rocks crystallized from calc‐alkaline magma with different sources, but demonstrated consistent arc‐like signatures, as they are enriched in large‐ion lithophile elements and light rare earth element (LREE), and depleted in high‐ field‐strength elements and heavy rare earth element (HREE). Besides, they present negative Nb–Ta anomalies together with significant P and Ti troughs. Finally, an evolutional model has been proposed that the asthenosphere‐lithosphere interaction played an important role during the emplacement of the complex, where the limited volumes of mantle‐derived melt act as the suppliers of heat and mass (mainly volatile components) to induce partial melting of the juvenile mafic lower crust and mixed (or mingled) with the produced crust‐derived magma during the oceanic subduction, which led to the generation of diorites as well as mafic microgranular enclaves.

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Subduction-related mafic to felsic magmatism in the Malayer–Boroujerd plutonic complex, western Iran

Cited by 16 publications

References 115 publications

Plume‐Induced Breakup of a Subducting Plate: Microcontinent Formation Without Cessation of the Subduction Process

Plume‐Induced Breakup of a Subducting Plate: Microcontinent Formation Without Cessation of the Subduction Process

Comment on ‘Jurassic igneous rocks of the central Sanandaj–Sirjan zone (Iran) mark a propagating continental rift, not a magmatic arc’ by Azizi and Stern (Terra Nova, 31(5), 415‐423, 2019)

Subduction‐related mafic to felsic magmatism in the Xiangpishan concentric calc‐alkaline complex, Northeast Tibetan Plateau

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