Johannes work accepted for publication in EPSL

Johannes‘ work on the seismic siganture of wadsleyite hydration  in Earth’s transition zone has been accepted by Earth and Planetary Science Letters. The work is entitled „High-pressure single-crystal elasticity of wadsleyite and the seismic signature of water in the shallow transition zone“ and will be available online soon.

Paper accepted in EPSL (Kirsten)

Kirsten work on the effect of hydration on the elasticity of ringwoodite in Earth’s transition zone has been accepted by Earth and Planetary Science Letters. The work is entitled „Seismically Invisible Water in Earth’s Transition Zone?“ and will be available online soon.

GeoMaX members at AGU in New Orleans

Hauke, Johannes, Julia and Kirsten attended this year’s AGU meeting in San Francisco and presented work of the GeoMaX research group:

Buchen, J.; Marquardt, H.; Boffa Ballaran, T.; Kawazoe, T.; Speziale, S.; Kurnosov, A. (2017): How the 410-km discontinuity reflects mantle water content: Constraints from high-pressure experiments on wadsleyite single-crystal elasticity.

Immoor, J.; Marquardt, H.; Miyagi, L.; Lin, F.; Speziale, S.; Merkel, S.; Buchen, J.; Kurnosov, A.; Liermann, H.-P. (2017): Experimental deformation of (Mg,Fe)O ferropericlase in a resistive-heated DAC at conditions of the Earth’s lower mantle.

Marquardt, H.; Kurnosov, A.; Frost, D.; Boffa Ballaran, T.; Ziberna, L. (2017): High-pressure single-crystal elasticity measurements of Al-Fe-bridgmanite support a Fe3+-rich pyrolitic lower mantle.

Schulze, K.; Marquardt, H.; Boffa Ballaran, T.; Kurnosov, A.; Kawazoe, T.; Koch-Müller, M. (2017): Small Effect of Hydration on Elastic Wave Velocities of Ringwoodite in Earth’s Transition Zone.



Workshop at the Bavarian Academy of Sciences

Hauke organized a one-day workshop on „Mantle Dynamics and Deep Earth Material Cycles“ that took place in Munich on November, 20th and was funded by the Bavarian Academy of Sciences (Link). The idea of the workshop was to bring together scientists with different backgounds (experiments, modelling, geophysics) in an informal environment to discuss about current concepts of mantle flow and foster future interdisciplinary collaborations. The flyer to advertize the workshop can be found here (pdf), some impressions can be found below the program.

The program was as follows:

9.30 – 9.45:        Introduction (Dr. Hauke Marquardt, BGI Bayreuth)

9.45 – 10.15:      Seismic imaging of mantle convection (Dr. Stephanie Durand, Universität Münster)

10.15 – 10.45:    The Seismic Signature of High-resolution Mantle Circulation Models (Dr. Bernhard Schuberth, LMU München)

10.45 – 11.15:    Coffee Break

11.15 – 11.45: The preservation of large-scale heterogeneity in Earth’s mantle (Dr. Maxim Ballmer, ETH Zürich)

11.45 – 12.15:    Mineral scale modelling of two-phase deformation (Dr. Marcel Thielmann, BGI Bayreuth)

12.15 – 14.15:    Lunch Break

14.15 – 14.45:    Deformation of lower mantle phases and analogs (Prof. Lowell Miyagi, University of Utah)

14.45 – 15.00:    Experimental deformation of (Mg,Fe)O at lower mantle P/T-conditions (Julia Immoor, BGI Bayreuth)

15.00 – 15.30:    Experiments and EVPSC on two-phase aggregates (Dr. Nadege Hilairet, Université Lille)

15.30 – 16.00:    Coffee Break

16.00 – 16.15:    Three-axis presses: The path towards higher pressure, lower strain rates, and larger volumes (Dr. Nicolas Walte, Heinz Maier-Leibnitz Zentrum München)

16.15 – 16.30:    Role of grain boundaries for mantle deformation (Filippe Ferreira, BGI Bayreuth)

16.30 – 16.45:    Seismic structure imaged with off plane signals and its implications to mantle dynamics (Lina Schumacher, Universität Münster)

16.45 – 17.00:    Discussion, Farewell


Johannes receives poster price at HPMPS in Saint Malo

Johannes (GeoMaX PhD student) received the poster prize at the 9th High Pressure Mineral Physics Seminar that took place in Saint Malo. He presented his work on „High-pressure high-temperature single-crystal elasticity of iron-bearing wadsleyite: Reappraising the water sensitivity of seismic observables“.

Congratulations! Well deserved!

PhD short course on „Mineralogy, mineral physics and seismology of Earth’s mantle“

The GeoMaX group, in collaboration with seismologists from Münster, organized the 2nd short course on „Mineralogy, mineral physics and seismology of Earth‘s mantle“. The short course took place at BGI Bayreuth, some impressions are given below. In addition to the lectures and practicals given by GeoMaX group members, Christine Thomas from Münster and Laura Cobden from Utrecht, guest lectures were given by Christine Houser from the ELSI in Tokyo. Moreover, a resarch talk was provided by John Hernlund (ELSI). Participants of the 2nd PhD short course on „mineralogy, mineraly physis and seismology of Earth’s mantle“

Practical by PhD student Johannes Buchen on Equations of State

Christine Thomas explains how to analyse seismic data

Practical on „construction of seismic models from mineral physics data“

Participants presenting and discussing their own work