Environmental isotopes and noble gases in the deep aquifer system of Kazan Trona Ore Field, Ankara, central Turkey and links to paleoclimate

Sebnem Arslan, Hasan Yazicigil, Martin Stute, Peter Schlosser

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Environmental isotopes and noble gases in groundwater samples from the Kazan Trona Ore Field are studied to establish the temperature change between the Holocene and the late Pleistocene. Noble gas temperatures (NGTs) presented in this study add an important facet to the global paleotemperature map in the region between Europe and North Africa. The groundwater system under investigation consists of three different aquifers named shallow, middle and deep in which δ18O and δ2H vary from -8.10% to -12.80% and from -60.89% to -92.60% VSMOW, respectively. The average isotopic depletion between unconfined and confined parts of the system is -2.5% in δ18O and -20% in δ2H. It is not possible to explain this depletion solely with the elevation effect. Recharge temperatures derived from dissolved atmospheric noble gases reflect the current average yearly ground temperatures (13°C) for samples collected near the recharge area but are 3 to 8°C lower than today's temperatures in the deep aquifer system. Low 14C activities and high He excesses in the confined parts of the aquifer system suggest that the water in the deep aquifer was recharged during the last Pleistocene under considerably cooler climatic conditions.

Original languageEnglish (US)
Pages (from-to)292-303
Number of pages12
JournalQuaternary Research (United States)
Volume79
Issue number2
DOIs
StatePublished - Mar 2013
Externally publishedYes

Keywords

  • Central Turkey
  • Complex aquifer system
  • Environmental isotopes
  • Kazan Basin
  • Noble gases
  • Paleoclimate
  • Paleowater

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Earth-Surface Processes
  • Earth and Planetary Sciences(all)

Fingerprint Dive into the research topics of 'Environmental isotopes and noble gases in the deep aquifer system of Kazan Trona Ore Field, Ankara, central Turkey and links to paleoclimate'. Together they form a unique fingerprint.

Cite this