Late Cretaceous calc-alkaline and adakitic magmatism in the Sistan suture zone (Eastern Iran): Implications for subduction polarity and regional tectonics

Michael Jentzer,Hubert Whitechurch,Philippe Agard,Marc Ulrich,Benoit Caron,Mohammad Hossein Zarrinkoub,Reza Kohansal, Lucie Miguet,Jafar Omrani,Marc Fournier

Journal of Asian Earth Sciences（2020）

引用 14|浏览20

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摘要

•Arc magmatism reveals Late Cretaceous (~86–71 Ma) NE dipping subduction of the Sistan ocean.•Low-K calc-alkaline series derive from mixing of mantle DMM and slab-derived fluids.•High silica-adakites (HSA) require an additional slab meltcomponent.•HSA are best explained by slab breakoff-related asthenosphere upwelling after eclogite formation.

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关键词

Sistan orogeny,Calc-alkaline magmatism,Adakite,Iran geodynamics,Subduction

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