Clumped isotopes

Responsible for

Alexis Licht , Chargé de Recherches : licht@cerege.fr

Anne-Lise Jourdan, Research Engineer: jourdan@cerege.fr

Tools

A mass spectrometer Thermo 253 Plus - named Rachel, connected to 1 automated carbonate preparation line Thermo Kiel IV modified with a Peltier trap at Porapaq - Ross.
The system measures ∆47 with very high precision on samples (~100 µg) of carbonates

A CO2 extraction line (named Günther) connected to the 253 Plus, for the measurement of ∆47 and ∆48 on samples of carbonate of ~1000 µg

Thermo Kiel IV

with Porapaq/Peltier trap

(Ross)

Mass spectrometer

Thermo 253+

(Rachel)

CO2 extraction line

for ∆48

(Günther)

Applications

The ∆47 and ∆48 compositions of the carbonates provide information on the mineralization temperature of the minerals and provide a paleo-thermometer that will be used to :

Reconstructing past marine temperatures: measurements on the shells of carbonate microplankton (foraminifera, for example).
Reconstructing surface temperatures: measurements on continental carbonates (e.g. soil calcite or continental gastropods).
Reconstructing the history of the burial of a basin or the activity of a fault: measurements on secondary carbonates (i.e. formed during diagenesis processes).

The equipment is financed by and used exclusively for the project's research. ERC (CoG) DISPERSAL, attributed to Alexis Licht (2022-2027)