Geochemical and petrological characteristics of the Kale (Gumushane) volcanic rocks: Implications for the eocene evolution of eastern pontide arc volcanism, northeast Turkey

Arslan M. , Aliyazıcıoğlu İ.

INTERNATIONAL GEOLOGY REVIEW, cilt.43, ss.595-610, 2001 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 43 Konu: 7
  • Basım Tarihi: 2001
  • Doi Numarası: 10.1080/00206810109465035
  • Sayfa Sayıları: ss.595-610


The Kale (Gumushane) volcanic rocks crop out in the southern zone of the eastern Pontide are, and consist mainly of agglomerate, andesite, minor basalt, and tuff associated with sediments (limestone, marl, siltstone, sandstone) deposited in a shallow basin environment. The volcanites show mainly porphyritic, hyalo-porphyritic, and rare fluidal and glomeroporphyritic textures. These volcanic rocks consist predominantly of plagioclase, augite, homblende, and lesser biotite, magnetite, and quartz, and secondary products of chloritization, carbonation, sericitization, and epidotization. In general, they show disequilibrium textures, possibly reflecting magma-mixing processes.