Synthesis, structure and properties of carbonates at earth-mantle conditions

• Antragsteller: Professor Dr. Wulf Depmeier, seit 12/2007; Professor Dr. Sandro Jahn
• Mitantragsteller: Professor Dr. Lars Ehm
• Fachliche Zuordnung: Mineralogie, Petrologie und Geochemie
• Förderung: Förderung von 2006 bis 2010
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 24941943

The crystal structures, thermoelastic properties and the stability of carbonate minerals, and the reaction of divalent metal oxides or hydroxides with CO2 at conditions of the Earth¿s mantle shall be investigated. Conditions exceeding 20 GPa and 2000 K are provided by laser heating in the diamond anvil cell, the use of multi anvil apparatus MAX200x and Paris-Edinburg type opposed-anvil devices at synchrotron radiation facilities and in the laboratory. Experimental studies are combined with quantum mechanical calculations. That research will contribute to the question what the capacity of the deep earth as a CO2 reservoir is. We will investigate what new solid forms of CO2 and/or carbonates may occur in geological processes or during the envisaged storage of the green house gas CO2 in geological formations. Furthermore, model systems as Sr- or Ba-Carbonate will be studied to investigate the validity of general crystal-chemical guidelines as the pressure¿homologue rule.

• DFG-Verfahren: Schwerpunktprogramme
• Teilprojekt zu: SPP 1236: Strukturen und Eigenschaften von Kristallen bei extrem hohen Drücken und Temperaturen
• Internationaler Bezug: USA
• Ehemaliger Antragsteller: Privatdozent Dr. Karsten Knorr, bis 12/2007