scholarly journals Simultaneous high-pressure and high-temperature volume measurements of ice VII and its thermal equation of state

2010 ◽  
Vol 82 (13) ◽  
Author(s):  
Emiko Sugimura ◽  
Tetsuya Komabayashi ◽  
Kei Hirose ◽  
Nagayoshi Sata ◽  
Yasuo Ohishi ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Equation Of State ◽  
Thermal Equation ◽  
Thermal Equation Of State ◽  
Volume Measurements

scholarly journals High-Pressure High-Temperature Stability and Thermal Equation of State of Zircon-Type Erbium Vanadate

2018 ◽  
Vol 57 (21) ◽  
pp. 14005-14012 ◽  
Author(s):  
Javier Ruiz-Fuertes ◽  
Domingo Martínez-García ◽  
Tomás Marqueño ◽  
Daniel Errandonea ◽  
Simon G. MacLeod ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Equation Of State ◽  
Temperature Stability ◽  
High Temperature Stability ◽  
Thermal Equation ◽  
Thermal Equation Of State ◽  
High Pressure High Temperature ◽  
Zircon Type

scholarly journals Thermal equation of state of cubic boron nitride: Implications for a high-temperature pressure scale

2007 ◽  
Vol 75 (22) ◽  
Author(s):  
Alexander F. Goncharov ◽  
Jonathan C. Crowhurst ◽  
John K. Dewhurst ◽  
Sangeeta Sharma ◽  
Chrystele Sanloup ◽  
...  
Keyword(s):  
High Temperature ◽  
Equation Of State ◽  
Boron Nitride ◽  
Cubic Boron Nitride ◽  
Thermal Equation ◽  
Thermal Equation Of State ◽  
Pressure Scale

Thermal equation of state of rhenium diboride by high pressure-temperature synchrotron x-ray studies

2008 ◽  
Vol 78 (22) ◽  
Author(s):  
Yuejian Wang ◽  
Jianzhong Zhang ◽  
Luke L. Daemen ◽  
Zhijun Lin ◽  
Yusheng Zhao ◽  
...  
Keyword(s):  
High Pressure ◽  
Equation Of State ◽  
Thermal Equation ◽  
X Ray ◽  
Thermal Equation Of State ◽  
Rhenium Diboride

Thermal equation of state of natural tourmaline at high pressure and temperature

2016 ◽  
Vol 43 (5) ◽  
pp. 315-326 ◽  
Author(s):  
Jingui Xu ◽  
Yunqian Kuang ◽  
Bo Zhang ◽  
Yonggang Liu ◽  
Dawei Fan ◽  
...  
Keyword(s):  
High Pressure ◽  
Equation Of State ◽  
Thermal Equation ◽  
High Pressure And Temperature ◽  
Thermal Equation Of State

scholarly journals Delamination in Tibet: Deriving constraints from the density of eclogite

2021 ◽  
Author(s):  
Zhilin Ye ◽  
Dawei Fan ◽  
Bo Li ◽  
Qizhe Tang ◽  
Jingui Xu ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Equation Of State ◽  
Lower Crust ◽  
Gravitational Instability ◽  
Volume Data ◽  
Thermal Equation ◽  
Pressure Derivative ◽  
Temperature Conditions ◽  
Slab Breakoff

Abstract. Tibet, which is characterized by collisional orogens, has undergone the process of delamination or convective removal. The lower crust and mantle lithosphere appear to have been removed through delamination during orogenic development. Numerical and analog experiments demonstrate that the metamorphic eclogitized oceanic subduction slab or lower crust may promote gravitational instability due to its increased density. The eclogitized oceanic subduction slab or crustal root is believed to be denser than the underlying mantle and tends to sink. However, the density of eclogite under high-pressure and high-temperature conditions and density differences from the surrounding mantle is not preciously constrained. Here, we offer new insights into the derivation of eclogite density with a single experiment to constrain delamination in Tibet. Using in situ synchrotron X-ray diffraction combined with diamond anvil cell, experiments focused on minerals (garnet, omphacite, and epidote) of eclogite are conducted under simultaneous high-pressure and high-temperature conditions, which avoids systematic errors. Fitting the pressure-temperature-volume data with the third-order Birch-Murnaghan equation of state, the thermal equation of state (EoS) parameters, including the bulk modulus (KT0), its pressure derivative (KT0′), the temperature derivative ((KT/T)P), and the thermal expansion coefficient (α0), are derived. The densities of rock-forming minerals and eclogite are modeled along with the geotherms of two types of delamination. The delamination processes of subduction slab breakoff and the removal of the eclogitized lower crust in Tibet are discussed. The Tibetan eclogite which containing 40–60 vol. % garnet and 37–64 % degrees of eclogitization can promote the delamination of slab break-off in Tibet. Our results indicate that eclogite is a major controlling factor in the initiation of delamination. A high abundance of garnet, a high Fe-content, and a high degree of eclogitization are more conducive to instigating the delamination.

scholarly journals A New Reference for the Thermal Equation of State of Iron

Minerals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 100 ◽  
Author(s):  
Francesca Miozzi ◽  
Jan Matas ◽  
Nicolas Guignot ◽  
James Badro ◽  
Julien Siebert ◽  
...  
Keyword(s):  
High Pressure ◽  
Equation Of State ◽  
Solid Phase ◽  
Heating System ◽  
European Synchrotron Radiation Facility ◽  
Iron Core ◽  
Thermal Equation ◽  
Thermal Equation Of State ◽  
Diamond Anvil ◽  
Hcp Structure

The high-pressure, high-temperature behavior of iron was investigated to 140 GPa and 3500 K with in situ synchrotron X-ray diffraction. Iron samples were compressed in diamond-anvil cells and heated up with the double-sided laser-heating system installed at the high-pressure ID27 of the European Synchrotron Radiation Facility (ESRF). Three different structures, namely α-bcc, γ-fcc or ε-hcp Fe were identified as a function of pressure and temperature in the domain we explored. At pressures above 90 GPa, it is clearly shown that ε-iron is the single stable solid phase up to 160 GPa at high temperatures. The analysis of the P-V-T relationship allows us to propose a reliable experimental thermal equation of state (EoS) for iron. We also show that the addition of low pressure points to our EoS refinement yields more robust constrain on the determination of the reference volume V0 of the ε-hcp structure, which has important implications on the final parametrization of the equation of state. The extrapolation of the proposed EoS to core pressure conditions indicates that a pure iron core would have an excess of density of 3% compared to the PREM density profile.

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