Jurassic Igneous Rocks of the Central Sanandaj–Sirjan Zone (Iran) Mark a Propagating Continental Rift, Not a Magmatic Arc

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dc.contributor.ORCID0000-0002-8083-4632 (Stern, RJ)
dc.contributor.VIAF284885305 (Stern, RJ)
dc.contributor.authorAzizi, H.
dc.contributor.authorStern, Robert J.
dc.contributor.utdAuthorStern, Robert J.
dc.date.accessioned2020-04-11T21:58:22Z
dc.date.available2020-04-11T21:58:22Z
dc.date.issued2019-04-29
dc.descriptionDue to copyright restrictions and/or publisher's policy full text access from Treasures at UT Dallas is limited to current UTD affiliates (use the provided Link to Article).
dc.descriptionSupplementary material is available on publisher's website. Use the DOI link below.
dc.description.abstractJurassic igneous bodies of the Sanandaj–Sirjan zone (SaSZ) in SW Iran are generally considered as a magmatic arc but critical evaluation of modern geochronology, geochemistry and radiogenic isotopes challenges this conclusion. There is no evidence for sustained igneous activity along the ~1,200 km long SaSZ, as expected for a convergent plate margin; instead activity was brief at most sites and propagated NW at ~20 mm/a. Jurassic igneous rocks define a bimodal suite of gabbro-diorite and granite. Chemical and isotopic compositions of mafic rocks indicate subcontinental lithospheric mantle sources that mostly lacked subduction-related modifications. The arc-like features of S-type granites reflect massive involvement of Cadomian crust and younger sediments to generate felsic melts in response to mafic intrusions. We conclude that Jurassic SaSZ igneous activity occurred in a continental rift, not an arc. SaSZ igneous rocks do not indicate that subduction along the SW margin of Eurasia began in Jurassic time. © 2019 John Wiley & Sons Ltd
dc.description.departmentSchool of Natural Sciences and Mathematics
dc.identifier.bibliographicCitationAzizi, H., and R. J. Stern. 2019. "Jurassic igneous rocks of the central Sanandaj–Sirjan zone (Iran) mark a propagating continental rift, not a magmatic arc." Terra Nova 31(5): 415-423, doi: 10.1111/ter.12404
dc.identifier.issn0954-4879
dc.identifier.issue5
dc.identifier.urihttp://dx.doi.org/10.1111/ter.12404
dc.identifier.urihttps://hdl.handle.net/10735.1/7932
dc.identifier.volume31
dc.language.isoen
dc.publisherBlackwell Publishing Ltd
dc.rights©2019 John Wiley & Sons Ltd
dc.source.journalTerra Nova
dc.subjectSanandaj (Iran)
dc.subjectSīrjān (Kirmān, Iran)
dc.subjectGeology, Stratigraphic—Jurassic
dc.subjectMagmatism
dc.subjectIgneous rocks
dc.titleJurassic Igneous Rocks of the Central Sanandaj–Sirjan Zone (Iran) Mark a Propagating Continental Rift, Not a Magmatic Arc
dc.type.genrearticle

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