Carbonate analysis

Responsible for

Laurence Vidal , Professor : vidal@cerege.fr

Corinne Sonzogni, Research Engineer: sonzogni@cerege.fr

Tools

A mass spectrometer Delta V Plus, Thermo Fisher Scientific, connected to 1 automated carbonate preparation line Kiel IV, Thermo Fisher Scientific, to measure δ¹³C and δ¹⁸O with a high degree of precision on micro-samples (20-150 µg) of carbonates

An IRIS laser spectrometer Delta Ray with URI Connect (Thermo Fisher Scientific), enabling measurements δ¹³C and δ¹⁸O on samples of carbonates ≥ 200-550μg and the CO2 continuously, as well as measures δ¹³C on Dissolved Inorganic Carbon (DIC) in water.

Delta Ray

Kiel IV Carbonate Device

Delta V Plus

Applications

Isotopic analysis δ¹³C and δ¹⁸O carbonate samples (foraminifera, corals, ostracods, speleothems, fine fraction, etc.) by IRMS spectrometry and IRIS laser

Characterisation of climate change at high temporal resolution, mainly in tropical and sub-tropical zones (hydrological cycles, oceanic conditions)
Reconstitution of the past variability of certain climatic modes (such as ENSO)
Evolution of the carbonate system in the ocean in relation to CO₂atmospheric