GFZ German research centre for geo sciences

Closed projects

FOR 2125 - Structures, properties and reactions of carbonates at high pressures and temperatures - CarboPaT

Sieber, M. J., Reichmann, H.-J., Farla, R., Koch-Müller, M. (2023 online): Stability Of Magnesite In The Presence Of Hydrous Fluids Up To 12 Gpa: Insights Into Subduction Zone Processes And Carbon Cycling In The Earth’s Mantle. - American Mineralogist. https://doi.org/10.2138/am-2023-8982

Pennacchioni, L., Speziale, S., Winkler, B. (2023): Elasticity of natural aragonite samples by Brillouin spectroscopy. - Physics and Chemistry of Minerals, 50, 22. https://doi.org/10.1007/s00269-023-01244-7

Müller, J., Speziale, S., Efthimiopoulos, I., Jahn, S., Koch-Müller, M. (2016): Raman spectroscopy of siderite at high pressure: Evidence for a sharp spin transition. - American Mineralogist, 101, 12, 2638-2644. https://doi.org/10.2138/am-2016-5708


HRJRG-404 - Helmholtz Russia Joint Research Group

Structural properties of carbonate-silicate melts and their effect on fractionation processes in the deep Earth investigated by synchrotron radiation, spectroscopic, and ion probe methods

Pohlenz J., Pascarelli S., O Mathon O., Belin S., A Shiryaev A., Safonov O., Veligzhanin A., Murzin V., Irifune T., Wilke M. (2016) Structural properties of sodium-rich carbonate-silicate melts: An in-situ high-pressure EXAFS study on Y and Sr. Journal of Physics: Conference Series 712, 012083. doi: 10.1088/1742-6596/712/1/012083

Rosa A.D., Pohlenz J., de Grouchy C., Cochain B., Kono Y., Pasternak S., Mathon O., Irifune T., Wilke M. (2016) In situ characterization of liquid network structures at high pressure and temperature using X-ray absorption spectroscopy coupled with the Paris-Edinburgh press. High Pressure Research. doi: 10.1080/08957959.2016.1199693

Pohlenz, J., Rosa, A., Mathon, O., Pascarelli, S., Belin, S., Landrot, G., Murzin, V., Veligzhanin, A., Shiryaev, A., Irifune, T., Wilke, M. (2018) Structural controls of CO2 on Y, La and Sr incorporation in sodium-rich silicate - carbonate melts by in-situ high P-T EXAFS. Chemical Geology. doi: 10.1016/j.chemgeo.2017.12.023 


FOR 741 - Nanoscale processes and geomaterial properties

The research unit "Nanoscale processes and geomaterials properties" has been funded from 2007 to 2016 by the German Science Foundation (DFG) and the Austrian Science Fund (FWF).

The research included several closely interconnected projects such as (1) atomic structure, thermodynamic and kinetic properties of grain boundaries, (2) diffusion in polycrystals, (3) exsolution in mineral systems and (4) fluid assisted mineral replacement. Among others, projects addressed how grain- and phase boundaries are generated during homogeneous and heterogeneous nucleation, and how the network of grain and phase boundaries may evolve during thermally and stress induced re-crystallization. The focus lied on experimentation and theoretical work, and was complemented by studies on natural material and applied mineralogy.

The speakers of the Research Group Wilhelm Heinrich (GFZ) and Rainer Abart (University of Vienna) organised an EMU school on Mineral Reaction Kinetics from 19-23 September 2016 in Vienna and are editors of the EMU Notes in Mineralogy, Volume 16 "Mineral reaction kinetics: microstructures, textures, chemical and isotopic signatures".

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