Metamorphic history of glaucophane-paragonite-zoisite eclogites from the Shanderman area, northern iran

H. Omrani, M. Moazzen, R. Oberhänsli, T. Tsujimori, R. Bousquet, M. Moayyed

    Research output: Contribution to journalArticle

    16 Citations (Scopus)

    Abstract

    The Shanderman eclogites and related metamorphosed oceanic rocks mark the site of closure of the Palaeotethys ocean in northern Iran. The protolith of the eclogites was an oceanic tholeiitic basalt with MORB composition. Eclogite occurs within a serpentinite matrix, accompanied by mafic rocks resembling a dismembered ophiolite. The eclogitic mafic rocks record different stages of metamorphism during subduction and exhumation. Minerals formed during the prograde stages are preserved as inclusions in peak metamorphic garnet and omphacite. The rocks experienced blueschist facies metamorphism on their prograde path and were metamorphosed in eclogite facies at the peak of metamorphism. The peak metamorphic mineral paragenesis of the rocks is omphacite, garnet (pyrope-rich), glaucophane, paragonite, zoisite and rutile. Based on textural relations, post-peak stages can be divided into amphibolite and greenschist facies. Pressure and temperature estimates for eclogite facies minerals (peak of metamorphism) indicate 15-20 kbar at ~600 °C. The pre-peak blueschist facies assemblage yields

    Original languageEnglish
    Pages (from-to)791-812
    Number of pages22
    JournalJournal of Metamorphic Geology
    Volume31
    Issue number8
    DOIs
    Publication statusPublished - Oct 2013

    Fingerprint

    zoisite
    paragonite
    glaucophane
    metamorphism
    eclogite
    Rocks
    blueschist facies
    omphacite
    Minerals
    history
    mafic rock
    Garnets
    garnet
    mineral
    rock
    pyrope
    tholeiitic basalt
    serpentinite
    paragenesis
    greenschist facies

    Keywords

    • Eclogite
    • Late Palaeozoic
    • North Iran
    • P-T path
    • Palaeotethys
    • Shanderman

    ASJC Scopus subject areas

    • Geochemistry and Petrology
    • Geology

    Cite this

    Omrani, H., Moazzen, M., Oberhänsli, R., Tsujimori, T., Bousquet, R., & Moayyed, M. (2013). Metamorphic history of glaucophane-paragonite-zoisite eclogites from the Shanderman area, northern iran. Journal of Metamorphic Geology, 31(8), 791-812. https://doi.org/10.1111/jmg.12045

    Metamorphic history of glaucophane-paragonite-zoisite eclogites from the Shanderman area, northern iran. / Omrani, H.; Moazzen, M.; Oberhänsli, R.; Tsujimori, T.; Bousquet, R.; Moayyed, M.

    In: Journal of Metamorphic Geology, Vol. 31, No. 8, 10.2013, p. 791-812.

    Research output: Contribution to journalArticle

    Omrani, H, Moazzen, M, Oberhänsli, R, Tsujimori, T, Bousquet, R & Moayyed, M 2013, 'Metamorphic history of glaucophane-paragonite-zoisite eclogites from the Shanderman area, northern iran', Journal of Metamorphic Geology, vol. 31, no. 8, pp. 791-812. https://doi.org/10.1111/jmg.12045
    Omrani, H. ; Moazzen, M. ; Oberhänsli, R. ; Tsujimori, T. ; Bousquet, R. ; Moayyed, M. / Metamorphic history of glaucophane-paragonite-zoisite eclogites from the Shanderman area, northern iran. In: Journal of Metamorphic Geology. 2013 ; Vol. 31, No. 8. pp. 791-812.
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