عنوان مقاله :
Geochemistry of tertiary volcanic rocks in the tehran region, southern flanks of central alborz Mountains
عنوان به زبان ديگر :
Geochemistry of Tertiary volcanic rocks in the Tehran region, southern flanks of Central Alborz Mountains
پديد آورندگان :
Hoernle، K. A. نويسنده Leibniz Institute, Irannezhadi, M.R. , Pourmoafi، M. نويسنده Shahid Beheshti University, Vossoughi Abedini, M , Ghorbani، M. R. نويسنده Tarbiat Modares University, Ghorbani, M.R. , Vossoughi Abedini، M. نويسنده Shahid Beheshti University, Pourmoafi, M , Irannezhadi، M. R. نويسنده Shahid Beheshti University, Hoernle, K.A.
اطلاعات موجودي :
دو ماهنامه سال 1387
رتبه نشريه :
فاقد درجه علمي
كليدواژه :
Alborz , tertiary , subduction-related , Tehran
چكيده فارسي :
Tertiary volcanic rocks are found in the southern flanks of Central Alborz Mountains, in the north ofTehran. Their composition ranges from basalt to rhyolite. They range from low-K rocks to calk-alkaline,high-K .calk-alkaline and shoshonitic series and show subduction-related geochemical characteristics.Investigation of chemical analysis of major oxides and a vast range of trace elements of the rock amples of the region show that geochemical characteristics of these rocks have great similarities with those of volcanic arcs in the destructive plate margins, More enrichment in alkaline, alkaline earth elements, and Th with respect to N-MORB and depletion in HFSE (Ta, Nb, Zr, and Hf) relative to LREE are characteristics of the rocks of this region. The volcanic rocks are thought to be derived from a homogeneous mantle source modified by slab-derived melts and/or fluids and a small fraction of oceamc sediment.
چكيده لاتين :
Tertiary volcanic rocks are found in the southern flanks of Central Alborz Mountains, in the north of Tehran. Their composition ranges from basalt to rhyolite. They range from low-K rocks to calk-alkaline, high-K .calk-alkaline and shoshonitic series and show subduction-related geochemical characteristics. Investigation of chemical analysis of major oxides and a vast range of trace elements of the rock samples of the region show that geochemical characteristics of these rocks have great similarities with those of volcanic arcs in the destructive plate margins. More enrichment in alkaline, alkaline earth elements, and Th with respect to N-MORB and depletion in HFSE (Ta, Nb, Zr, and Hf) relative to LREE are characteristics of the rocks of this region. The volcanic rocks are thought to be derived from a homogeneous mantle source modified by slab-derived melts and/or fluids and a small fraction of oceanic sediment.
عنوان نشريه :
مجله پژوهشي علوم پايه دانشگاه اصفهان
عنوان نشريه :
مجله پژوهشي علوم پايه دانشگاه اصفهان
اطلاعات موجودي :
دوماهنامه با شماره پیاپی سال 1387
كلمات كليدي :
#تست#آزمون###امتحان
