Late Neoproterozoic gabbro emplacement followed by early Cambrian eclogite-facies metamorphism in the Menderes Massif (W. Turkey): Implications on the final assembly of Gondwana

O. Candan*, O. E. Koralay, G. Topuz, R. Oberhänsli, H. Fritz, A. S. Collins, F. Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

Numerous (meta-)gabbroic dikes or stocks occur within the latest Neoproterozoic-early Cambrian series of the Menderes Massif (Anatolide-Tauride Block, western Turkey). These well-preserved rocks were locally converted into eclogitic metagabbros and garnet amphibolites along the contacts or shear zones. Both bulk-rock composition and compositions of igneous clinopyroxenes suggest continental tholeiitic affinity. U-Pb dating of igneous zircons from gabbroic rocks yielded a mean age of 563 ± 1 Ma (2σ), indicating emplacement during the latest Neoproterozoic (Ediacaran). On the other hand, rims of zircons from eclogitic metagabbro gave 535 ± 3 Ma (2σ) (early Cambrian), in addition to 558 ± 3 Ma (2σ) obtained from the igneous core of zircons. These ages are interpreted as the time of high-P metamorphism and crystallization age of gabbroic protolith, respectively. Given the estimated paleogeographic position of the Anatolide-Tauride Block during the late Neoproterozoic and early Cambrian, this orogenic event can be spatially and temporally related to the northward continuity of 600-500 Ma orogenic event (Malagasy/Kuunga orogeny) extending from western margin of India, Madagascar, via Arabia up to northern margin of Gondwana beneath thick Phanerozoic cover series in Arabian Peninsula. Therefore, the high-P evolution of the basement of the Menderes Massif and associated basic intrusions can be interpreted to mark the latest stages of consumption of the basin/oceanic branches and final amalgamation of the Gondwana during the late Neoproterozoic-early Cambrian around the Arabian region.

Original languageEnglish
Pages (from-to)158-173
Number of pages16
JournalGondwana Research
Volume34
DOIs
Publication statusPublished - 1 Jun 2016

Bibliographical note

Publisher Copyright:
© 2015 International Association for Gondwana Research.

Funding

This work was financially supported by research grants from the Scientific and Technological Research Council of Turkey (T?BITAK; project nos.: YDAB?AG-495 and 103Y132) and Dokuz Eyl?l University (project no: 2006.KB.FEN.033). G. Topuz acknowledges support from T?BA GEBIP program. ASC's contribution is funded by the Australian Research Council grant #FT120100340 and forms TRaX Record #xxx. We thank Zhenhui Hou-Hefei and C?neyt Akal-Izmir for age facilities. We thank also two anonymous reviewers for their constructive and helpful comments. This work was financially supported by research grants from the Scientific and Technological Research Council of Turkey (TÜBITAK; project nos.: YDABÇAG-495 and 103Y132 ) and Dokuz Eylül University (project no: 2006.KB.FEN.033 ). G. Topuz acknowledges support from TÜBA GEBIP program . ASC's contribution is funded by the Australian Research Council grant # FT120100340 and forms TRaX Record #xxx. We thank Zhenhui Hou-Hefei and Cüneyt Akal-İzmir for age facilities. We thank also two anonymous reviewers for their constructive and helpful comments.

FundersFunder number
TÜBA
Australian Research CouncilFT120100340, 120100340
Türkiye Bilimsel ve Teknolojik Araştirma KurumuYDABÇAG-495, 103Y132
Dokuz Eylül ÜniversitesiKB.FEN.033

    Keywords

    • Eclogite
    • Gabbro
    • Malagasy/Kuunga orogeny
    • Menderes Massif
    • Turkey

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