<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">We report the results of high-precision (±0.05‰) oxygen isotope analysis of phosphates in 6 teeth of fossil sharks from the Mangyshlak peninsula. This precision was achieved by the offline preparation of CO2 which was then analyzed on a dual-inlet and triple-collector IRMS. The teeth samples were separated from Middle- and Late Bartonian sediments cropping out in two locations, Usak and Kuilus. Seawater temperatures calculated from the δ18O data vary from 23-41°C. However, these temperatures are probably overestimated due to freshwater inflow. The data point at higher temperature in the Late Bartonian than in the Middle Bartonian and suggest differences in the depth habitats of the shark species studied.</abstract>

We report the results of high-precision (±0.05‰) oxygen isotope analysis of phosphates in 6 teeth of fossil sharks from the Mangyshlak peninsula. This precision was achieved by the offline preparation of CO2 which was then analyzed on a dual-inlet and triple-collector IRMS. The teeth samples were separated from Middle- and Late Bartonian sediments cropping out in two locations, Usak and Kuilus. Seawater temperatures calculated from the δ18O data vary from 23-41°C. However, these temperatures are probably overestimated due to freshwater inflow. The data point at higher temperature in the Late Bartonian than in the Middle Bartonian and suggest differences in the depth habitats of the shark species studied.

Oxygen isotope analysis of shark teeth phosphates from Bartonian (Eocene) deposits in Mangyshlak peninsula, Kazakhstan

Zakład Spektrometrii Mas, Uniwersytet Marii Curie-Skłodowskiej, Pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland

Instytut Nauk Geologicznych, Uniwersytet Wrocławski, Pl. Maksa Borna 9, 50-204 Wrocław, Poland

Mineralogia

We report the results of high-precision (±0.05‰) oxygen isotope analysis of phosphates in 6 teeth of fossil sharks from the Mangyshlak peninsula. This...

Oxygen isotope analysis of shark teeth phosphates from Bartonian (Eocene) deposits in Mangyshlak peninsula, Kazakhstan

Published Online: Jul 04, 2012

Page range: 53 - 61

DOI: https://doi.org/10.2478/v10002-011-0006-7

Keywords
Bartonian, carbonate, Mangyshlak peninsula, phosphate, shark teeth, δO, δC

This content is open access.

Oxygen isotope analysis of shark teeth phosphates from Bartonian (Eocene) deposits in Mangyshlak peninsula, Kazakhstan

Published Online: Jul 04, 2012

Page range: 53 - 61

DOI: https://doi.org/10.2478/v10002-011-0006-7

KeywordsBartonian, carbonate, Mangyshlak peninsula, phosphate, shark teeth, δO, δC

This content is open access.

Keywords
Bartonian, carbonate, Mangyshlak peninsula, phosphate, shark teeth, δO, δC