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, vol.43, no.7, pp.595-610, 2001 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 43 Issue: 7
  • Publication Date: 2001
  • Doi Number: 10.1080/00206810109465035
  • Title of Journal : INTERNATIONAL GEOLOGY REVIEW
  • Page Numbers: pp.595-610

Abstract

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.