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Deformation of ZrSiO4-MgO aggregates: Deviatoric stress as a control on deformation mechanisms

Xiaoling Zhou1,2,3,4,*,†, Lianyang Chen5,*, Mingzhi Yuan1,6,*, Feng Lin2,7, Tian Ye5, Feng Zhao8, Martin Kunz3, and Lowell Miyagi2,‡

  • 1School of Science, Harbin Institute of Technology, Shenzhen, Guangdong 510085, China
  • 2Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah 84112, USA
  • 3Advanced Light Source, Lawrence Berkeley National Lab, Berkeley, California 94720, USA
  • 4Department of Geosciences, Princeton University, Princeton, New Jersey 08542, USA
  • 5School of Aeronautics, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China
  • 6Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
  • 7Department of Aerospace Engineering, Iowa State University, Ames, Iowa 50011, USA
  • 8Institute for Advanced Study and Institute for Advanced Materials Deformation and Damage from Multi-Scale, Chengdu University, Chengdu, Sichuan 610106, China

  • *These authors contributed equally to this work.
  • †zhouxiaoling@hit.edu.cn
  • ‡lowell.miyagi@utah.edu
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Phys. Rev. B 105, L220101 – Published 3 June, 2022

DOI: https://doi.org/10.1103/PhysRevB.105.L220101

Abstract

Deformation behavior of multiphase aggregates has great significance for materials design and understanding the dynamics of the Earth. Here we studied the deformation of zircon (ZrSiO4)-MgO aggregates and found that the introduction of MgO reduced overall deviatoric stress in the aggregates and thus controlled deformation mechanisms of the zircon phase. Zircon primarily deforms by a dominant {101}〈10−1〉 slip; however, activity of zircon {100}〈010〉 slip increases with the introduction of an increased ratio of MgO into the aggregates, as suggested by the experiments and simulations. We also found both zircon and MgO in the aggregates retained strong deformation texture, which is likely related to the symmetric variants of the dominant slip system of the hard zircon phase. Our results help to clarify the discrepancies in previous studies and understand which phase may dominate the seismic anisotropy in geosciences.

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Phys. Rev. B 105, L220101– Published 3 June, 2022
  • Received 16 August 2020
  • Revised 4 April 2022
  • Accepted 19 May 2022
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