The genesis of the slab window-related Arzular low-sulfidation epithermal gold mineralization (eastern Pontides, NE Turkey)


Akaryali E., Tuysuz N.

GEOSCIENCE FRONTIERS, vol.4, no.4, pp.409-421, 2013 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 4 Issue: 4
  • Publication Date: 2013
  • Doi Number: 10.1016/j.gsf.2012.12.002
  • Title of Journal : GEOSCIENCE FRONTIERS
  • Page Numbers: pp.409-421

Abstract

The Arzular mineralization is one of the best examples of epithermal gold deposits in the eastern Pontides orogenic belt. The mineralization is hosted by the subduction-related basaltic andesites and is mainly controlled by E-W and NE-SW trending fracture zones. The main ore minerals are galena, sphalerite, pyrite, chalcopyrite, tetrahedrite and gold. Homogenization temperatures of fluid inclusions are between 130 and 295 degrees C for quartz and between 90 and 133 degrees C for sphalerite. Sulphur isotope values obtained from pyrite, galena and sphalerite vary between -1.2 parts per thousand and 3 parts per thousand, indicating that sulphur belongs to magmatic origin and was derived from the Lutetian non-adakitic granitic intrusions in the region. Oxygen isotope values are between 15.0 parts per thousand and 16.7 parts per thousand, and hydrogen isotope values are between -87 parts per thousand and -91 parts per thousand. The sulphur isotope thermometer yielded temperatures in the range of 244-291 degrees C for the ore formation. Our results support the hypothesis that the Arzular mineralization is a low-sulfidation epithermal gold deposit associated with non-adakitic subduction-related granitic magmas that were generated by slab window-related processes in a south-dipping subduction zone during the Lutetian. (C) 2013, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. All rights reserved.