Turkish Journal of Earth SciencesGeochemical and Petrological Characteristics of the Eastern Pontide Eocene (?) Alkaline Volcanic Province, NE Turkey
Karadeniz Teknik Üniversitesi, Jeoloji Mühendisliği Bölümü, 61080, Trabzon-TURKEY
Abstract: The Eastern Pontide Alkaline Volcanic Province is developed by volcanic cycles erupted in Cenozoic era. Petrographical and geochemical data suggest presence of at least two different suits of alkaline rocks (Tonya group and Trabzon group). Petrographically, both groups consist of alkali basalt, tephrite, phonolitic tephrite, basanite, nephelinite, nepheline latite and their pyroclastic rocks. Geochemically, Tonya samples have high MgO and Ni, low LREE contents and LILE/HFSE ratios compare to Trabzon group. Preliminary studies show that these two groups of rocks are related with low level differentiation and derived from a metasomatised mantle source.
Turkish J. Earth Sci., 7, (1998), 231-240.
Full text: pdf
Other articles published in the same issue: Turkish J. Earth Sci.,vol.7,iss.3.