Thermodynamische Modelle für die Hoch-Temperatur Metamorphose metabasischer und intermediärer Gesteine

• Antragsteller: Professor Dr. Richard William White
• Fachliche Zuordnung: Mineralogie, Petrologie und Geochemie
• Förderung: Förderung von 2012 bis 2015
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 231390288

During mountain-building, the lower part of the Earth's crust is sufficiently hot to partially melt. This melt may separate from its source, moving higher in the crust to contribute to igneous intrusions, and leaving behind residual rocks that are characteristic of the lower crust. Unraveling the history of such rocks provides the key to understanding the evolution of the lower crust and the role of melt and melt loss play in the differentiation of the crust. One important approach to understanding metamorphic rocks is thermodynamic modeling. However, this approach is limited to rocks and minerals for which thermodynamic descriptions exist and currently can be done only for some rock-types, but not for others. The lack of an appropriate thermodynamic model for melt that can be applied to metabasic rocks, along with limitations in the thermodynamic models for amphibole and pyroxene, has limited our ability to apply thermodynamic modeling to metabasic and intermediate rocks at high temperatures. In this project we will develop a new thermodynamic model for silicate melt and extend and improve the amphibole and pyroxene models to allow thermodynamic modeling of partially melted metabasic rocks for the first time.

• DFG-Verfahren: Sachbeihilfen