Neogene volcanism in Elazig-Tunceli area (eastern Anatolia): geochronological and petrological constraints


Agostini S., Savascin M. Y. , Di Giuseppe P., Di Stefano F., KARAOĞLU Ö. , Lustrino M., ...More

ITALIAN JOURNAL OF GEOSCIENCES, vol.138, no.3, pp.435-455, 2019 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 138 Issue: 3
  • Publication Date: 2019
  • Doi Number: 10.3301/ijg.2019.18
  • Title of Journal : ITALIAN JOURNAL OF GEOSCIENCES
  • Page Numbers: pp.435-455
  • Keywords: Neogene volcanism, Eastern Anatolia, Ar-Ar geochronology, radiogenic isotopes, petrology, WESTERN ANATOLIA, HIGH PLATEAU, QUATERNARY VOLCANISM, COLLISION-ZONE, ACTIVE MARGIN, EVOLUTION, TURKEY, ROCKS, GEOCHEMISTRY, MALATYA

Abstract

The Elazig and Tunceli provinces in eastern Anatolia host a complex succession of Miocene-Pleistocene effusive and explosive volcanic rocks, divided into four distinct volcanic phases. The most abundant and widespread products are the calcalkaline Mazgirt volcanic rocks, characterized by wide Sr isotope variations ( Sr-87/Sr-86 similar to 0.7054-0.7077) and narrower Nd-143/Nd-144 (similar to 0.51246-0.51260) and Pb isotopes (e.g., Pb-206/Pb-204 similar to 18.89-19.13). New Ar-40-Ar-39 ages indicate that Mazgirt volcanic activity occurred between similar to 16.3 and 15.1 Ma. The other three volcanic phases are represented by the Tunceli mildly alkaline basaltic lavas (similar to 11.4-11.0 Ma), the Pliocene Karakocan (similar to 4.1 Ma) and Pleistocene Elazig (similar to 1.9-1.6 Ma) Na-alkali basaltic lavas with clear OIB-like geochemical signature.