Title of article :
Geochemical characteristics of Yamadağı volcanics in central east Anatolia: an example from collision-zone volcanism
Author/Authors :
Yalç?n، نويسنده , , Hüseyin and Gündo?du، نويسنده , , M.Niyazi and Gourgaud، نويسنده , , Alain and Vidal، نويسنده , , Philippe and Uçurum، نويسنده , , Ali، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 1998
Pages :
24
From page :
303
To page :
326
Abstract :
Neogene Yamadağı volcanic rocks consist of basaltic trachyandesite, trachyandesite, andesite, and dacite. The major- and trace-element chemistry indicates that the lavas are dominantly calc-alkaline and mildly alkaline in character, sodic in nature, and intermediate to acidic in composition. REE and trace-element patterns of volcanic rocks are similar to those typical of within plate magmatics. Volcanic rocks have low 87Sr/86Sr (0.70389–0.70633) and high 143Nd/144Nd ratios (0.51267–0.51276) and mostly plot within the mantle array of the isotope ratio diagram. The linear correlations among 87Sr/86Sr−143Nd/144Nd, SiO2−87Sr/86Sr and SiO2−143Nd/144Nd isotope ratios in the volcanics suggest that fractional crystallization combined with minor assimilation was an important process within the collision zone.
Keywords :
Yamada?? , Volcanic Rocks , collision-zone volcanism
Journal title :
Journal of Volcanology and Geothermal Research
Serial Year :
1998
Journal title :
Journal of Volcanology and Geothermal Research
Record number :
2242430
Link To Document :
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