Temperatures of the habitat of quaternary mollusks from Azerbaijan as determined from the Ca/Mg ratio

Aliyev S., Sari A.

GEOCHEMISTRY INTERNATIONAL, cilt.43, sa.9, ss.920-927, 2005 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 43 Sayı: 9
  • Basım Tarihi: 2005
  • Dergi Adı: GEOCHEMISTRY INTERNATIONAL
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.920-927
  • Ankara Üniversitesi Adresli: Evet

Özet

This study focuses on the characterization of calcium and magnesium distribution in the shells of Quaternary mollusks from Azerbaijan and paleotemperature estimates from the Ca/Mg ratio. Using the obtained paleotemperature values, three stages of temperature maximum were distinguished in the Quaternary period: Holocene (19.9-24.3 degrees C), early Khvalyn (19.6-24.4 degrees C), and early Khazar (19.3-22.2 degrees C); and two stages of cooling: late Khvalyn (13.5-15.7 degrees C) and late Khazar (15.9-17.2 degrees C), corresponding to the glacial and interglacial epochs of the late Pleistocene. The obtained temperatures of the marine habitat and sedimentation in the Caspian Sea (from the Ca/Mg ratio) were compared with temperature data for the eastern Mediterranean Sea determined by various methods. The reported calcium-magnesium paleotemperatures are in agreement with the paleotemperature estimates obtained by the investigation of the species composition of various systematic groups of planktonic foraminifera and delta O-18 in the Late Quaternary basins of the eastern Mediterranean Sea (including the Sea of Marmara). These data provide an adequate record of variations in the temperature conditions of the habitat of Caspian mollusks of Azerbaijan in Quaternary time.