Trachyandesites, trachytes, andesites, and pyrocalstic rocks, with shoshonitic signature, are the main Quaternary volcanic rocks in the Sabalan region (Ardabil). Plagiocalse, K-feldspar, biotite associated with clinopyroxene, and glass are the main constituents of these lavas. Plagioclases are andesine to labradorite while clinopyroxenes have augitic composition.The Sabalan volcanic rocks show enrichment in LREEs (relative to HREEs) and are characterized by enrichment in LILEs and depletion in HFSEs. Petrological observations, along with rare earth and trace elements geochemistry, suggest shoshonitic signature for Sabalan lavas. This signature highlights derivation from a subduction-related source. The Sabalan volcanic rocks are isotopically characterized by derivation from an enriched mantle source with a tendency to plot in the fields defined by island-arc basalts (IAB) and OIBs (in
کلید واژگان :Shoshonite, Quaternary lavas, Sr-Nd isotopes, Post-collisional setting, Sabalan
ارزش ریالی : 600000 ریال
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جزئیات مقاله
- کد شناسه : 1141969004757103
- سال انتشار : 2013
- نوع مقاله : پذیرفته شده در مجلات Scopus ,ISI با 4>IF>
- زبان : انگلیسی
- محل پذیرش : Journal of Geological Research, Hindawi Publishing Corporation, 2013, Volume 2013
- IF مجله :
- ISSN : 1687-8833
- تاریخ ثبت : 1393/10/06 17:50:47
- ثبت کننده : حبیب شهبازی شیران
- تعداد بازدید : 321
- تعداد فروش : 0