Pressure and Temperature Dependences of Elastic Properties of Grossular Garnet up to 17 GPa and 1 650 K  

作　　者：Yoshio Kono Steeve Gréaux Yuji Higo Hiroaki Ohfuji Tetsuo Irifune 

机构地区：[1]Geodynamics Research Center, Ehime University [2]JASRI, 1-1-1 Mikazuki-cho, Sayo-gun, Hyogo 679-5198, Japan

出　　处：《Journal of Earth Science》2010年第5期782-791,共10页地球科学学刊（英文版）

基　　金：supported by the research proposal to SPring-8 by Y Kono (No. 2007B1648);the Grant-in-Aid for Scientific Research from the Japanese Government to T Irifune

摘　　要：Simultaneous ultrasonic elastic wave velocity and in situ synchrotron X-ray measurements on grossular garnet were carried out up to 17 GPa and 1 650 K. P- and S-wave vdoeities and bulk and shear modulus showed linear pressure and temperature dependence. These data yielded a pressure derivative of the bulk modulus of 4.42（7） and a shear modulus of 1.27（3）, which are in good agreement with those of garnets with variable chemical compositions. Temperature dependence of the bulk modulus of grossular （-1.36×10^-2 GPafK） is also similar to that of other garnets, while the temperature dependence of the shear modulus of grossular （-1.11×10^-2 GPa/K） is higher than those of magnesium end-member garnets and pyrolitic garnet.Simultaneous ultrasonic elastic wave velocity and in situ synchrotron X-ray measurements on grossular garnet were carried out up to 17 GPa and 1 650 K. P- and S-wave vdoeities and bulk and shear modulus showed linear pressure and temperature dependence. These data yielded a pressure derivative of the bulk modulus of 4.42（7） and a shear modulus of 1.27（3）, which are in good agreement with those of garnets with variable chemical compositions. Temperature dependence of the bulk modulus of grossular （-1.36×10^-2 GPafK） is also similar to that of other garnets, while the temperature dependence of the shear modulus of grossular （-1.11×10^-2 GPa/K） is higher than those of magnesium end-member garnets and pyrolitic garnet.

关 键 词：elastic property GROSSULAR GARNET high pressure high temperature. 

分 类 号：P584[天文地球—岩石学]