Cameron Meyers

  • Program Year: 4
  • Academic Institution: University of Minnesota
  • Field of Study: Rock and Mineral Physics
  • Academic Advisor: David Kohlstedt
  • Practicum(s):
    Lawrence Livermore National Laboratory (2016)
  • Degree(s):
    B.S. Geology, Brown University, 2012

Summary of Research

Convection in the Earth’s mantle provides the primary driving force for plate tectonics. Therefore, constraints on the deformation mechanics of the mantle are critical to understanding complex tectonic phenomena observed at Earth's surface, such as earthquake generation and magma production. My research is focused on exploring the physics of flow of mantle materials by experimentally measuring deformation behavior in response to a stress imposed at high temperatures under confining pressure. Mechanical data, along with an experimentally verified mechanical model, results in a flow law or constitutive equation that relates stress to deformation rate, temperature, pressure, chemical environment and physical state of the rock. Microstructural observations -- including measurements of grain size, shape, boundary distribution, and crystallographic orientation -- allow further insights into the physical processes and feedbacks operating during deformation.

My research relies heavily on two unique deformation apparatuses. The first is equipped for torsional deformation, capable of applying gas confining pressures up to 0.5 GPa (equivalent to roughly 15 km depth) and temperatures up to 1300°C. Such extreme gas confining pressures suppress cracking while allowing for high-resolution measurement of stress (~0.001 GPa). The torsional geometry is capable of producing large strains (over 1000%), necessary for applying laboratory results to geological problems. The newly developed deformation-DIA apparatus used in conjunction with a synchrotron x-ray beam line is used to explore deformation at greater pressures/depths (capable of 10 GPa, roughly 300 km) and temperatures up to 1800°C. X-ray diffraction provides precise measurement of pressure and stress, while x-ray images enable measurement of strain and strain-rate.

Publications

-Meyers, C.D., D.L. Kohlstedt, M.E. Zimmerman, 2017. Densification and Grain Growth in Polycrystalline Olivine Rocks Synthesized By Evacuated Hot-Pressing. AGU Fall Meeting 2017.

-Nguyen, D.T., C. Meyers, T.D. Yee, N.A. Dudukovic, J.F. Destino, C. Zhu, E.B. Duoss, T.F. Baumann, T. Suratwala, J.E. Smay, R. Dylla-Spears, 2017. 3D-Printed Transparent Glass. Advanced Materials, 1701181.

-Dudukovic, N., D. Nguyen, T. Yee, J. Destino, C. Meyers, E. Duoss, R. Dylla-Spears, 2017. Rheological Characterization of Colloidal Silica Suspensions for 3D Printing of Optical Glass Monoliths. The Society of Rheology 88th Annual Meeting, abstract.

-Dylla-Spears, R.J., D.T. Nguyen, C.D. Meyers, J.F. Destino, N. Dudukovic, E.B. Duoss, J. Hughes, M.A.Johnson, L.R. Siegel, J.E. Smay, W.A. Steele, C.M Spadaccini, T.I. Suratwala, T.D. Yee, C. Zhu, 2017. Silica glass with tailored refractive index profile using direct-ink-write additive manufacturing. 12th Pacific Rim Conference on Ceramic and Glass Technology, abstract.

-Tielke, J. A., L. N. Hansen, M. Tasaka, C. Meyers, M. E. Zimmerman, D. L. Kohlstedt, 2016. Observations of grain-size sensitive power-law creep of olivine aggregates over a large range of lattice-preferred orientation strength. Journal of Geophysical Research: Solid Earth.

-Meyers, C. D., D. L. Kohlstedt, 2015. An Experimental Study of CPO Development and Anisotropic Creep of Polycrystalline Olivine. American Geophysical Union Fall Meeting, Crustal and Mantle Deformation and Metamorphism: Microstructure, Rheology, and the Effects of Fluids I Posters, T43B-2988.

-Cross, A. J., G. Hirth, C. Meyers, D. J. Prior, 2015. Mechanical weakening of the mid-crust by coseismic elastic loading: Insights from strain rate stepping experiments on plagioclase aggregates. Microstructural evolution under non-steady state deformation in mid-crustal ductile shear zones (Thesis, Doctor of Philosophy). University of Otago.

-Meyers, C., G. Hirth, A. Cross, D. Prior, 2013. The effect of dynamic recrystallization and LPO formation on deformation mechanisms in experimentally deformed plagioclase aggregates. American Geophysical Union Fall meeting, Deformation Processes: Microstructure, Rheology, and the Effects of Fluids IV Posters, T53A-2557.

-Cross A., G. Hirth, C. Meyers, D. Prior, 2013. Transient weakening of fine-grained plagioclase aggregates during strain rate cycling experiments. American Geophysical Union Fall meeting, Deformation Processes: Microstructure, Rheology, and the Effects of Fluids IV Posters, T53A-2558.

-Dygert, N., C. Meyers, G. Hirth, Y. Liang., 2013. Weakness of ilmenite revealed by new rheological measurements with implications for lunar cumulate mantle overturn. Lunar and Planetary Science Conference, XLIV, Poster #1591.

-Meyers, C., G. Hirth, E. Goergen, 2012. The influence of dynamic recrystallization on deformation mechanisms and strain partitioning in experimentally deformed plagioclase aggregates. American Geophysical Union Fall Meeting, Deformation and Transport Properties in the Dynamic Earth I Posters, MR33A-2443.

-Meyers, C., G. Hirth, E. Goergen, 2012. The influence of dynamic recrystallization on deformation mechanisms and strain partitioning in experimentally deformed plagioclase aggregates. Gordon Research Conference: Feedback Processes in Rock Deformation, Poster #73.

-Goergen, E., C. Meyers, G. Hirth, 2011. Experimental investigation of LPO development and recrystallized grain size evolution in plagioclase and plagioclase + olivine aggregates, American Geophysical Union Fall Meeting,Tectonophysics Posters, T43C-2326.

Awards

-Winner, Stewardship Science Graduate Fellowship Annual Essay Contest (6/2015)

- Graduate School Fellowship, College of Science and Engineering, University of Minnesota (9/2013-8/2014)

- Graduation with Honors, Brown University (5/2012)

- Outstanding Academics and Research Award in Geology, awarded to a graduating senior in the Brown University Department of Geological Sciences (5/2012)

- Sarah Lamendola Award, awarded to a junior undergraduate in geology each year for performance in geology coursework and excellent potential for senior thesis research (5/2011)

- Undergraduate Teaching Research Award, awarded to undergraduates to support summer research at Brown University (5/2011)