Physics and Chemistry of Minerals

, Volume 42, Issue 3, pp 213–222 | Cite as

Elastic wave velocity of polycrystalline Mj80Py20 garnet to 21 GPa and 2,000 K

  • Zhaodong LiuEmail author
  • Tetsuo Irifune
  • Steeve Gréaux
  • Takeshi Arimoto
  • Toru Shinmei
  • Yuji Higo
Original Paper


The elastic wave velocities of polycrystalline Mj80Py20 garnet along the majorite–pyrope system have been measured at pressures up to 21 GPa and temperatures up to 2,000 K using ultrasonic interferometry in conjunction with in situ X-ray diffraction techniques in a Kawai-type multi-anvil apparatus. The elastic moduli of Mj80Py20 garnet and their pressure and temperature derivatives are determined by a two-dimensional linear fitting of the present experimental data, yielding: K S = 161.5 (7) GPa, ∂K S/∂P = 4.42 (4), ∂K S/∂T = −0.0154 (2) GPa/K, G = 86.2 (2) GPa, ∂G/∂P = 1.28 (1), ∂G/∂T = −0.0096 (5) GPa/K. The present results together with those of the studies on the majorite–pyrope solid solutions suggest the pressure and temperature derivatives of elastic moduli are insensitive to the majorite content in the majorite–pyrope system. The velocity gradients of the majoritic garnets in the majorite–pyrope system are 3 ~ 6 times lower than those required to account for the high seismic velocity gradients observed in the mantle transition zone.


Garnet Elastic wave velocity Elastic moduli Velocity gradients 



The authors are grateful to H. Ohfuji and M. Nishi for their helps in FE-SEM observations. We thank C. Zhou, T. Kunimoto, Y. Tange, N. Cai, W. Du, and X. Wang for their experimental technical assistances and valuable discussions. We appreciate Y. Nishihara for his help in FTIR measurements. We are also grateful for constructive reviews by Dr. C. McCammon and two anonymous reviewers. The present study is supported by the Grant-in-Aid for Scientific Research (S) by JSPS to T. Irifune (Grant No. 25220712).


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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Zhaodong Liu
    • 1
    Email author
  • Tetsuo Irifune
    • 1
    • 2
  • Steeve Gréaux
    • 1
    • 2
  • Takeshi Arimoto
    • 1
  • Toru Shinmei
    • 1
  • Yuji Higo
    • 3
  1. 1.Geodynamics Research CenterEhime UniversityMatsuyamaJapan
  2. 2.Earth-Life Science InstituteTokyo Institute of TechnologyTokyoJapan
  3. 3.Japan Synchrotron Radiation InstituteHyogoJapan

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