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Ghahroudi-Tali, M., Abdoli, E. and Nezammahalleh, M.A. (2013) Geomorphological and Sedimentological Evidence of Alpine Glaciers in the Zagros Mountains, Dinevar, Iran. Journal of Tethys, 1, 85-95.

has been cited by the following article:

  • TITLE: Mineral Chemistry in Volcanic Rocks of Ore Deposit Nochun and Sarcheshmeh Copper Mine, Iran

    AUTHORS: Mehdi Abdollahi Riseh, Mansur Vosughi Abedini, Mohammad Hashem Emami, Seysd Jamal Sheikh Zakariaii

    KEYWORDS: Petrography, Fractional Crystallization, Sarcheshmeh Copper Mine

    JOURNAL NAME: Open Journal of Geology, Vol.7 No.3, March 22, 2017

    ABSTRACT: This paper studies on clinopyroxene, plagioclase of andesitic to dacite rocks of Nochun area to understand the geotectonic and geothermobarometry conditions. Eocene calc-alkaline volcanic rocks are exposed in Nochun that are near the Sarcheshmeh cooper mine. Volcanic rocks consist of andesitic to dacite rocks. Minerals in the volcanic rocks exhibit degrees of disequilibrium features. Plagioclase as dominant mineral in these rocks generally displays oscillatory zoning; sieves or dusty, cores are usually Ca-rich. Petrographic evidence and varying anorthite content (10% to 90%) of plagioclase and temperature estimates of clinopyroxene indicated fractional crystallization condition later than hydrothermal alteration and partial metasomatism occurred. The varying content indicates that the parent’s magma was generated from subalkaline composition and then hydrothermal alteration affected phenocryst minerals and matrix of andesitic to dacite rocks. The equilibration temperatures of clinopyroxene showed (800°C - 1200°C). Thus, in mafic minerals development of sieve textures in plagioclase, reaction rims, zoning and heterogeneity of plagioclase phenocrysts, the resorbed and embayed phenocrysts, unique composition of clinopyroxene phenocrysts; support fractional crystallization at deep reservoir and high pressure condition as an important process in the evolution of these rocks.