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Information Journal Paper

Title

A PETROLOGICAL STUDY OF TAROM OLIA PLUTONISM (KOHIAN AREA)

Pages

  250-270

Abstract

 Kohian pluton is located 32 km north-east of Zanjan in Tarom area. This pluton has emplaced in volcanoclastic rocks of Karaj Formation (Eocene) indicating a younger age.Data analysis of KOHIAN pluton in various tectonomagmatic diagrams show a similarity to continental arc granites or post collisional granites. Even in some cases it has some of the characteristics of intraplate, and rift related or epirogenic intrusive rocks.The presence of two groups of acidic and basic rocks(bimodality) and the lack of geochemical relationship between them(Daly gap) in most of the diagrams, as well as the absence of normal increasing or decreasing trends of elemental oxides with respect to silica during the fractional crystallization suggest a separate origin for the formation of each groups of rocks. In other words, after the Pyrenean orogeny, in a extensional phase, a sodic alkali basaltic magma originated from the mantle asended the crust through the active faults and caused partial melting and anatexy of the crust.This process led to the formation of a potassic and acidic magma, an indication of the role of post collisional tectonic setting. BIMODALITY and Daly gap observed in rock groups are considered the characteristics of continental rift environments.

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    APA: Copy

    ASHJA ARDALAN, A., & EMAMI, M.H.. (2005). A PETROLOGICAL STUDY OF TAROM OLIA PLUTONISM (KOHIAN AREA). JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY), 15(57 (GEOLOGY ISSUE)), 250-270. SID. https://sid.ir/paper/70465/en

    Vancouver: Copy

    ASHJA ARDALAN A., EMAMI M.H.. A PETROLOGICAL STUDY OF TAROM OLIA PLUTONISM (KOHIAN AREA). JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY)[Internet]. 2005;15(57 (GEOLOGY ISSUE)):250-270. Available from: https://sid.ir/paper/70465/en

    IEEE: Copy

    A. ASHJA ARDALAN, and M.H. EMAMI, “A PETROLOGICAL STUDY OF TAROM OLIA PLUTONISM (KOHIAN AREA),” JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY), vol. 15, no. 57 (GEOLOGY ISSUE), pp. 250–270, 2005, [Online]. Available: https://sid.ir/paper/70465/en

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    مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
    مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
    مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
    مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
    مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
    مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
    مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources
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