My research focuses on the experimental exploration of material properties at extreme pressure and temperature conditions typical for planetary interiors. I develop and perform both laboratory experiments and measurements at large-scale synchrotron facilities. I use the results to interpret geophysical observations as well as to improve geophysical models of planetary interior dynamics and deep Earth material cycles.
Short CV:
2022-: Professor of Earth Sciences, University of Oxford
2018-: Associate Professor for Solid Earth Geosciences, University of Oxford
2018-: Tutorial Fellow at Worcester College, Oxford
2014-2018: Emmy Noether Group leader at Bayerisches Geoinstitut (BGI), University Bayreuth
2010-2014: Postdoctoral researcher at German Research Center for Geosciences GFZ, Potsdam
2009: Postdoctoral researcher at University of California, Berkeley
2007-2009: Doctoral research assistant at Free University Berlin
2006: Student researcher at German Research Center for Geosciences GFZ, Potsdam
2005: Student researcher at Eberhard-Karls University Tübingen
Awards and Recognitions:
2019: ERC Consolidator Grant “DEEP-MAPS”
2016: Member Bavarian Academy of Sciences (ausserordentliches Mitglied, Junges Kolleg) (Link)
2014: DFG Emmy Noether-program
2013: Hermann Credner-Award, Deutsche Gesellschaft für Geowissenschaften (Link)
2010: German Thesis Award (“Deutscher Studienpreis”) of the Körber-Stiftung (Link)
2009: Young Researcher Award of the city of Potsdam (Link)
2008: “Outstanding Student Paper Award” of the American Geophysical Union (AGU)
2006: “Outstanding Student Paper Award” of the American Geophysical Union (AGU)
View Selected Publications
Immoor, J., L. Miyagi, H. P. Liermann, S. Speziale, K. Schulze, J. Buchen, A. Kurnosov and H. Marquardt (2022). Weak cubic CaSiO3 perovskite in the Earth’s mantle. Nature 603(7900): 276-279. (Link)
Méndez, A. S. J., S. Stackhouse, V. Trautner, B. Wang, N. Satta, A. Kurnosov, R. Husband, K. Glazyrin, H. P. Liermann and H. Marquardt (2022). Broad elastic softening of (Mg,Fe)O ferropericlase across the iron spin crossover and a mixed-spin lower mantle. Journal of Geophysical Research: Solid Earth n/a(n/a): e2021JB023832. (Link)
Satta, N., G. Criniti, A. Kurnosov, T. Boffa Ballaran, T. Ishii and H. Marquardt (2021). High-Pressure Elasticity of δ-(Al,Fe)OOH Single Crystals and Seismic Detectability of Hydrous MORB in the Shallow Lower Mantle. Geophysical Research Letters 48(23): e2021GL094185. (Link)
Jenei, Zs.; Liermann, H.-P.; Husband, R.; Méndez*, A.S.J.; Pennicard, D.; Marquardt, H.; O’bannon, E.F.; Pakhomova, A.; Konopkova, Z.; Glazyrin, K.; Wendt, M.; Wenz, S.; McBride, E.E.; Morgenroth, W.; Winkler, B.; Rothkirch, A.; Hanfland, M.; Evans, W. (2019): New dynamic diamond anvil cells for tera-pascal per second fast compression x-ray diffraction experiments. Review of Scientific Instruments, 90, 065114. (Link)
Marquardt, H.; Buchen, J.*; Mendez, A.*; Kurnosov, A.#; Wendt, M.; Rothkirch, A.; Pennicard, D.; Liermann, H.-P. (2018): Elastic softening of (Mg0.8Fe0.2) O ferropericlase across the iron spin crossover measured at seismic frequencies, Geophysical Research Letters, doi: 10.1029/2018GL077982. (Link).
(selected as “Research Highlight” by DESY Synchrotron)
Schulze, K.*; Marquardt, H.; Kawazoe, T.; Boffa Ballaran, T.; McCammon, C.; Koch-Müller, M.; Kurnosov, A.#; Marquardt, K. (2018): Seismically Invisible Water in Earth’s Transition Zone? Earth and Planetary Science Letters, 498, 9-16. (Link)
Buchen, J.*; Marquardt, H.; Boffa Ballaran, T.; Speziale, S.; Kurnosov; A.#; Kawazoe, T. (2018): High-pressure single-crystal elasticity of wadsleyite and the seismic signature of water in the shallow transition zone. Earth Planetary Science Letters, 498, 77-87. (Link)
Immoor, J.*; Marquardt, H.; Miyagi, L.; Lin, F.; Speziale, S.; Merkel, S.; Buchen, J.; Kurnosov, A.; Liermann, H.-P. (2018): Evidence for {100}<011> slip in ferropericlase in Earth’s lower mantle from high-pressure/high-temperature experiments. Earth and Planetary Science Letters, 489, 251-257. (Link)
Kurnosov#, A.; Marquardt, H.; Frost, D.J.; Boffa Ballaran, T.; Ziberna, L. (2017): High-pressure single crystal elasticity measurements of Al-Fe-bridgmanite support a Fe3+-rich pyrolitic lower mantle. Nature, 543, 543-546 (Link).
Marquardt, H.; Miyagi, L. (2015): Slab stagnation in the shallow lower mantle linked to an increase in mantle viscosity. Nature Geoscience, 8, 311-314 (Link)
Lin, J.-F.; Speziale, S.; Mao, Z.; Marquardt, H. (2013): Effects of the electronic spin transitions of iron in lower-mantle minerals: implications to deep-mantle geophysics and geochemistry. Reviews in Geophysics, 51: 244-275 (Link)
Cammarano, F.; Marquardt, H.; Speziale, S.; Tackley, P. (2010): Role of iron-spin transition in ferropericlase on seismic interpretation: A broad thermochemical transition in the mid mantle? Geophysical Research Letters, 37, L03308. (Link)
Marquardt, H.; Speziale, S.; Reichmann, H. J.; Frost, D. J.; Schilling, F. R.; Garnero, E. J. (2009): Elastic Shear Anisotropy of Ferropericlase in Earth’s Lower Mantle. Science, 324, 224-226. (Link)
Marquardt, H.; Speziale, S.; Reichmann, H. J.; Frost, D. J.; Schilling, F. R. (2009): Single-crystal Elasticity of (Mg,Fe)O to 81.2 GPa. Earth and Planetary Science Letters, 287, 345-352 (Link)
View Extended Publications
Book Chapters:
44. Speziale, S.; Marquardt, H.; Duffy, T. S. (2014): Brillouin Scattering in Geosciences. In MSA Reviews in Mineralogy and Geochemistry, 78, 543-603 (Link)
Peer-reviewed Articles (*and # denote supervised students and postdocs
43. Couper, S.; Speziale, S.; Marquardt, H.; Liermann, H.-P.; Miyagi, L. (2020): Experimental Evidence for Heterogeneous Strain as a Control on Seismic Anisotropy in Earth’s Lower Mantle. Frontiers in Geophysics, 8, 427.
42. Mendéz*, A.; Marquardt, H.; Husband, R.; Schwark, I.; Mainberger, J.; Glazyrin, K.; Kurnosov, A.; Otzen, C.; Satta*, N.; Bednarcik, J.; Liermann, H.-P. (2020): A resistively-heated dynamic diamond anvil cell (RHdDAC) for fast compression x-ray diffraction experiments at high temperatures. Review of Scientific Instruments, doi: 10.1063/5.0007557.
41. Marquardt, H.; Thomson, A. (2020): Experimental Elasticity of Earth’s Deep Mantle. Nature Reviews Earth and Environment, 9, 455-469.
40. Immoor*, J.; Marquardt, H.; Miyagi, L.; Speziale, S.; Merkel, S.; Liermann, H.-P. (2020): An improved setup for radial diffraction experiments at high pressures and high temperatures in a resistive graphite-heated DAC. Review of Scientific Instruments, 4, 045121.
39. Thielmann, M.; Golabek, G.: Marquardt, H. (2020): Ferropericlase control of lower mantle rheology: Impact of phase morphology. Geochemistry, Geophysics, Geosystems, 21(2), e2019GC008688.
38. Koemets*, I.; Satta, N.*; Kurnosov#, A.; Marquardt, H.; Kiseeva, E.S.; Stachel, Th.; Harris, J.W.; Dubrovinsky, L. (2020): Elastic properties of majoritic garnet inclusions in diamonds and the seismic signature of pyroxenites in Earth’s upper mantle. American Mineralogist, 105(7), 984–991.
37. Speziale, S.; Immoor*, J.; Ermakov, A.; Marquardt, H.; Liermann, H.-P. (2019): The equation of state of TaC0.99 by X-ray diffraction in radial scattering geometry to 32 GPa and 1073 K. Journal of Applied Physics, 126(10), 105107.
36. Satta*, N.; Marquardt, H.; Kurnosov, A.#; Buchen, J.; Kawazoe, T.; McCammon, C.; Boffa Ballaran, T. (2019): Single-crystal elasticity of iron-bearing phase E by Brillouin spectroscopy and seismic detection of water in Earth’s upper mantle. American Mineralogist, 104(10), 1526.
35. Jenei, Zs.; Liermann, H.-P.; Husband, R.; Méndez*, A.S.J.; Pennicard, D.; Marquardt, H.; O’bannon, E.F.; Pakhomova, A.; Konopkova, Z.; Glazyrin, K.; Wendt, M.; Wenz, S.; McBride, E.E.; Morgenroth, W.; Winkler, B.; Rothkirch, A.; Hanfland, M.; Evans, W. (2019): New dynamic diamond anvil cells for tera-pascal per second fast compression x-ray diffraction experiments. Review of Scientific Instruments, 90, 065114. (Link)
34. Preston, T.R.; Appel, K.; Brambrink, E.; Chen, B.; Fletcher, L.B.; Fortmann-Grote, C.; Glenzer, S.H.; Granados, E.; Göde, S.; Konopkova, Z.; Lee, H.J.; Marquardt, H.; McBride, E.E.; Nagler, B.; Nakatsutsumi, M.; Sperling, P.; Witte, B.B.L.; Zastrau, U. (2019): Measurements of the momentum-dependence of plasmonic excitations in matter around 1 Mbar using an X-ray Free Electron Laser. Applied Physics Letters, 114, 014101, doi.org/10.1063/1.5070140. (Link)
33. Kurnosov, A.#; Marquardt, H.; Dubrovinsky, L.; Potapkin, V.# (2018): A waveguide-based flexible CO2 laser heating system for diamond-anvil cell applications. Comptes Rendus Geosciences, in press, doi.org/10.1016/j.crte.2018.09.008. (Link)
32. Kurnosov, A.#; Marquardt, H.; Frost, D.J.; Boffa Ballaran, T.; Ziberna, L. (2018): Reply to Comment on „ Evidence for a Fe3+-rich pyrolitic lower mantle from (Al,Fe)-bearing bridgmanite elasticity data“. Nature, 564, E27-E31. (Link)
31. Schulze, K.*; Pamato, M.G.; Kurnosov, A.#; Boffa Ballaran, T.; Glazyrin, K.; Pakhomova, A.; Marquardt, H. (2018): High-pressure single-crystal structural analysis of AlSiO3OH Phase Egg. American Mineralogist, 103 (12), 1975-1980. (Link)
30. Buchen, J.*; Marquardt, H.; Schulze, K.*; Speziale, S.; Boffa Ballaran, T.; Nishiyama, N.; Hanfland, M. (2018): Equation of state of polycrystalline stishovite across the tetragonal-orthorhombic phase transition, Journal of Geophysical Research: Solid Earth, doi: 10.1029/2018JB015835. (Link)
29. Marquardt, H.; Buchen, J.*; Mendez, A.*; Kurnosov, A.#; Wendt, M.; Rothkirch, A.; Pennicard, D.; Liermann, H.-P. (2018): Elastic softening of (Mg0.8Fe0.2) O ferropericlase across the iron spin crossover measured at seismic frequencies, Geophysical Research Letters, doi: 10.1029/2018GL077982. (Link). (selected as “Research Highlight” by DESY Synchrotron)
28. Schulze, K.*; Marquardt, H.; Kawazoe, T.; Boffa Ballaran, T.; McCammon, C.; Koch-Müller, M.; Kurnosov, A.#; Marquardt, K. (2018): Seismically Invisible Water in Earth’s Transition Zone? Earth and Planetary Science Letters, 498, 9-16. (Link)
27. Buchen, J.*; Marquardt, H.; Boffa Ballaran, T.; Speziale, S.; Kurnosov; A.#; Kawazoe, T. (2018): High-pressure single-crystal elasticity of wadsleyite and the seismic signature of water in the shallow transition zone. Earth Planetary Science Letters, 498, 77-87. (Link)
26. Immoor, J.*; Marquardt, H.; Miyagi, L.; Lin, F.; Speziale, S.; Merkel, S.; Buchen, J.; Kurnosov, A.; Liermann, H.-P. (2018): Evidence for {100}<011> slip in ferropericlase in Earth’s lower mantle from high-pressure/high-temperature experiments. Earth and Planetary Science Letters, 489, 251-257. (Link)
25. Lin, F.; Merkel, S.; Hilairet, N.; Marquardt, H.; Immoor, J.*; Tomé, C.; Miyagi, L.: Elasto-visco-plastic self-consistent (EVPSC) modeling of periclase deformation at high pressure. Submitted to Journal of Applied Physics, 122, 205902 (Link).
24. Buchen, J.*; Marquardt, H.; Boffa Ballaran, T.; McCammon, C.; Kawazoe, T. (2017): The equation of state of wadsleyite solid solutions: Constraining the effects of anisotropy and crystal chemistry. In press, American Mineralogist, 102 (12): 2494-2504 (Link).
23. Marquardt, K.; De Graef, M; Singh, S.; Marquardt, H.; Rosenthal, A.; Hiraga, T.; Koizumi, S. (2017): Quantitative electron backscatter diffraction data (EBSD) analyses using the dictionary indexing (DI) approach: overcoming indexing difficulties on geological materials. In press, American Mineralogist,
22. Schulze, K.*; Buchen, J.*; Marquardt, K.,Marquardt, H. (2017): Multi-sample loading technique for physical property measurements in the diamond-anvil cell. In press, High-Pressure Research, 37, 159-169(Link).
21. Nishiyama, N.; Ishikawa, R.; Ohfuji, H.; Marquardt, H.; Kurnosov, A.#; Taniguchi, T.; Kim, B.-N.; Yoshida, H.; Masuno, A.; Bednarcik, J.; Kulik, E.; Ikuhara, Y.; Wakai, F.; Irifune, T. (2017): Transparent polycrystalline cubic silicon nitride. In press, Scientific Reports, 7, 44755 (Link).
20. Kurnosov#, A.; Marquardt, H.; Frost, D.J.; Boffa Ballaran, T.; Ziberna, L. (2017): High-pressure single crystal elasticity measurements of Al-Fe-bridgmanite support a Fe3+-rich pyrolitic lower mantle. Nature, 543, 543-546 (Link).
19. Marquardt, K; Rohrer, G.; Rybacki, E.; Marquardt, H.; Lin, B. (2015): The most frequent interfaces in olivine aggregates: the GBCD and its importance for grain boundary related processes. Contributions to Mineralogy and Petrology, 170, 1-17 (Link).
18. Kawazoe, T.; Buchen*, J.; Marquardt, H. (2015): Synthesis of large wadsleyite single crystals by solid-state recrystallization. American Mineralogist, 100, 2336-2339 (Link).
17. Marquardt, H.; Miyagi, L. (2015): Slab stagnation in the shallow lower mantle linked to an increase in mantle viscosity. Nature Geoscience, 8, 311-314 (Link)
16. Mookherjee, M.; Speziale, S.; Marquardt, H.; Jahn, S.; Wunder, B.; Koch-Müller, M.; Liermann, H.-P. (2015): Equation of state and elasticity of the 3.65 Å phase – a candidate cause of the seismic X-discontinuity. American Mineralogist, 100, 2199-2208 (Link).
15. Marquardt, H.; Speziale, S.; Koch-Müller, M.; Marquardt, K.; Capitani, G. (2015): Structural insights and elasticity of single-crystal antigorite from high-pressure Raman and Brillouin spectroscopy measured in the (010) plane. American Mineralogist, 100, 1932-1939 (Link).
14. Marquardt, H.; Speziale, S.; Gleason, A.; Sinogeikin, S.; Kantor, I.; Prakapenka, V. (2013): Brillouin Scattering and X-ray Diffraction of Solid Argon to 65 GPa and 700 K: Shear strength of argon at HP/HT. Journal of Applied Physics, 114: 093517. (Link)
13. Speziale, S.; Marquardt, H.; Liermann, H.-P. (2013): Approaches to constrain single-crystal elastic constants from Brillouin scattering of polycrystalline samples. High-Pressure Research, 33: 607-621 (Link)
12. Lin, J.-F.; Speziale, S.; Mao, Z.; Marquardt, H. (2013): Effects of the electronic spin transitions of iron in lower-mantle minerals: implications to deep-mantle geophysics and geochemistry. Reviews in Geophysics, 51: 244-275 (Link)
11. Marquardt, H.; Waeselmann, N.; Wehber, M.; Angel, R.J.; Gospodinov, M.; Mihailova, B. (2013): High-pressure Brillouin scattering of single-crystal PbSc1/2Ta1/2O3 relaxor ferroelectric. Physical Review B, 87: 184113 (Link)
10. Marquardt, H.; Marquardt, K. (2012): Focused Ion Beam preparation and characterization of single-crystal samples for high-pressure experiments in the diamond-anvil cell. American Mineralogist, 97: 299-304 (Link, pdf)
9. Marquardt, H.; Speziale, S.; Reichmann, H.J.; Konopkova, Z.; Morgenroth, W.; Liermann, H.-P. (2011): The Effect of Crystallite Size and Stress Condition on the Equation of State of Nano-crystalline MgO. Journal of Applied Physics, 110: 113512-113515. (Link)
8. Marquardt, H.; Gleason, A.; Marquardt, K.; Speziale, S.; Miyagi, L.; Neusser, G.; Wenk, H.-R.; Jeanloz, R. (2011): Elastic Properties of MgO Nano-crystals and Grain Boundaries to High Pressures. Physical Review B, 84: 064131. (Link)
7. Weidenfeller, B.; Marquardt, H.; Razzaq, M.Y.; Anhalt, M.; Schilling, F.R.; Frormann, L. (2011): Thermal Properties of Polyurethane Shape Memory Polymer Filled With Magnetite Particles. Proceedings of AJTEC2011, 44050 (Link)
6. Gleason, A.; Marquardt, H.; Chen, B.; Speziale, S.; Wu, J.; Jeanloz, R. (2011): Anomalous sound velocities in polycrystalline MgO under non-hydrostatic compression. Geophysical Research Letters, 38, L03304 (Link)
5. Cammarano, F.; Marquardt, H.; Speziale, S.; Tackley, P. (2010): Role of iron-spin transition in ferropericlase on seismic interpretation: A broad thermochemical transition in the mid mantle? Geophysical Research Letters, 37, L03308. (Link)
4. Marquardt, H.; Speziale, S.; Reichmann, H. J.; Frost, D. J.; Schilling, F. R.; Garnero, E. J. (2009): Elastic Shear Anisotropy of Ferropericlase in Earth’s Lower Mantle. Science, 324, 224-226. (Link)
3. Marquardt, H.; Speziale, S.; Reichmann, H. J.; Frost, D. J.; Schilling, F. R. (2009): Single-crystal Elasticity of (Mg,Fe)O to 81.2 GPa. Earth and Planetary Science Letters, 287, 345-352 (Link)
2. Marquardt, H.; Speziale, S.; Jahn, S.; Ganschow, S.; Schilling, F. R. (2009): Single-crystal Elastic Properties of (Y,Yb)3Al5O12. Journal of Applied Physics, 106:093519 (Link)
1. Marquardt, H.; Ganschow, S.; Schilling, F. R. (2009): Thermal Diffusivity of Natural and Synthetic Garnet Solid Solution Series. Physics and Chemistry of Minerals, 36, 107-118 (Link)