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A new tectonic scenario fro the Sanandaj-Sirjan Zone (Iran)
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Solid Earth Geology. (tectonics)
2006 (English)In: Journal of Asian Earth Sciences, ISSN 1367-9120, E-ISSN 1878-5786, Vol. 26, no 6, 683-693 p.Article in journal (Refereed) Published
Abstract [en]

Recent geochemical studies of volcanic rocks forming part of the ophiolites within the Zagros and Naien-Baft orogen indicate that most of them were developed as supra-subduction ophiolites in intra-oceanic island arc environments. Intra-oceanic island arcs and ophiolites now forming the Naien-Baft zone were emplaced southwestward onto the northeastern margin of the South Sanandaj-Sirjan Zone, while those now in the High Zagros were emplaced southwestward onto the northern margin of Arabia. Thereafter, subduction continued on opposite sides of the remnant oceans. The floor of Neo-Tethys Ocean was subducted at a low angle beneath the entire Sanandaj-Sirjan Zone, and the floor of the Naien-Baft Ocean was subducted beneath the Central Iranian Micro-continent. The Naien-Baft Ocean extended into North-West Iran only temporarily. This failed ocean arm (between the Urumieh-Dokhtar Magmatic Assemblage and the main Zagros Thrust) was filled by thick Upper Triassic-Upper Jurassic sediments. The Naien-Baft Ocean finally closed in the Paleocene and Neo-Tethys closed in the Early to Middle Eocene. After Arabia was sutured to Iran. the Urumieh-Dokhtar Magmatic Assemblage recorded slab break-off in the Middle Eocene.

Place, publisher, year, edition, pages
2006. Vol. 26, no 6, 683-693 p.
Keyword [en]
Neo-Tethyan ocean; Zagros orogenic belt; supra-subduction ophiolite; slab breakoff
National Category
Geosciences, Multidisciplinary
Identifiers
URN: urn:nbn:se:uu:diva-76288DOI: 10.1016/j.jseaes.2005.01.003ISI: 000238901400010OAI: oai:DiVA.org:uu-76288DiVA: diva2:104200
Available from: 2007-04-12 Created: 2007-04-12 Last updated: 2017-12-14Bibliographically approved

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Talbot, Christopher J.

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