PETROLOGICAL STUDY OF PLAGIOGRANITES IN THE NAIN OPHIOLITE (CENTRAL IRAN)

Authors

  • Zahra Rezaei* Department of Petroleum Engineering, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran
  • Moussa Noghreyan** Department of Geology, University of Isfahan, Isfahan, Iran
  • Mahmoud Khalili Department of Geology, University of Isfahan, Isfahan, Iran

DOI:

https://doi.org/10.4454/ofioliti.v37i2.409

Keywords:

Plagiogranite, Nain ophiolite, Supra-Subduction Zone, Mesozoic, Central Iran

Abstract

The plagiogranites from the Nain ophiolite consist of plagioclase (albite to andesine), quartz, amphibole (mostly magnesio-hornblende), apatite, titanite and oxide phases. These rocks have low K2O, Sr and high Y contents, with low Sr/Y ratios; they are geochemically similar to volcanic arc granites. The chondrite normalized REE patterns of the selected samples are characterized by negative Eu anomalies. We propose that the Nain plagiogranites formed by fractional crystallization of a low-K tholeiitic magma in a supra-subduction setting.

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Published

2012-12-27

How to Cite

Rezaei*, Z., Noghreyan**, M., & Khalili, M. (2012). PETROLOGICAL STUDY OF PLAGIOGRANITES IN THE NAIN OPHIOLITE (CENTRAL IRAN). Ofioliti, 37(2), 93-99. https://doi.org/10.4454/ofioliti.v37i2.409

Issue

Vol. 37 No. 2 (2012)

Section

Articles