Project 5

Metal isotope fractionation during carbonates dissolution/precipitation processes and at equilibrium.

Knowledge on carbonates-fluid interaction is essential for modeling major natural (formation of sedimentary carbonates, preservation of palaeo-environmental signatures in carbonate rocks, ocean chemistry, etc.), and industrial processes.

Despite the importance of carbonate rocks there are few works devoted to the study of Mg and Ca isotope fractionation during carbonate-fluid interactions. The aim of project 5 is to significantly advance our understanding on these interactions through the development of different carbonates dissolution/precipitation experiments as a function of temperature, fluid composition, pH and CO2 pressure.

Main objectives

  • Provide experimental evidence of calcium (Ca) and (Mg) isotope fractionation between an aqueous fluid and carbonates during its dissolution, precipitation and at equilibrium under analogous conditions to sedimentary carbonate formation and CO2
  • Addressing the paradox of recent to ancient dolomite deposits as well as the fate of CO2
  •  Advance in our understanding of carbonates-fluid interactions and thereby have important implications for other industrial and economically relevant aspects, e.g. mineral scale formation.