Noriyoshi Tsujino
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View article: Olivine‐Ahrensite Phase Relations in the Mg <sub>2</sub> SiO <sub>4</sub> ‐Fe <sub>2</sub> SiO <sub>4</sub> System as a Function of Temperature
Olivine‐Ahrensite Phase Relations in the Mg <sub>2</sub> SiO <sub>4</sub> ‐Fe <sub>2</sub> SiO <sub>4</sub> System as a Function of Temperature Open
Olivine and ahrensite are the primary components of the interiors of Fe‐rich terrestrial planets and meteorites, making their phase relations crucial for planetary science. Moreover, their phase relations can be used for calibrating large‐…
View article: Invar behavior and negative thermal expansion linked to magnetic transition in dhcp iron hydride under high pressure conditions
Invar behavior and negative thermal expansion linked to magnetic transition in dhcp iron hydride under high pressure conditions Open
This dataset provides the unit-cell volume of iron hydride with dhcp structure at each PT conditions. Note that those data was obrtained during cooling process.
View article: A Stress Memory Effect in Olivine at Upper Mantle Pressures and Temperatures
A Stress Memory Effect in Olivine at Upper Mantle Pressures and Temperatures Open
Cyclic deformation experiments on olivine aggregates have been conducted at pressures of 1.9–2.8 GPa and temperatures of 297–1250 K. Measurements of mechanical data combined with acoustic emission (AE) monitoring revealed that activity of …
View article: Crystallographic Preferred Orientation of Phase D at High Pressure and Temperature: Implications for Seismic Anisotropy in the Mid‐Mantle
Crystallographic Preferred Orientation of Phase D at High Pressure and Temperature: Implications for Seismic Anisotropy in the Mid‐Mantle Open
Seismic anisotropy has been widely observed in the lower mantle transition zone and the uppermost lower mantle near several subducting slabs, which is typically attributed to the crystallographic preferred orientation (CPO) of constituent …
View article: Transient Creep in Olivine at Shallow Mantle Pressures: Implications for Time‐Dependent Rheology in Post‐Seismic Deformation
Transient Creep in Olivine at Shallow Mantle Pressures: Implications for Time‐Dependent Rheology in Post‐Seismic Deformation Open
Transient creep in olivine aggregates has been studied by stress‐relaxation experiments at pressures of 1.7–3.6 GPa and at temperatures of ≤1020 K in a DIA apparatus. Time‐dependent deformation of olivine at small strains (<0.07) was monit…
View article: Effect of water on seismic attenuation of the upper mantle: The origin of the sharp lithosphere–asthenosphere boundary
Effect of water on seismic attenuation of the upper mantle: The origin of the sharp lithosphere–asthenosphere boundary Open
Oceanic lithosphere moves over a mechanically weak layer (asthenosphere) characterized by low seismic velocity and high attenuation. Near mid-ocean ridges, partial melting can produce such conditions because of the high-temperature geother…
View article: The hydrous mechanism changes in enstatite with Al incorporation studied by DFT calculations
The hydrous mechanism changes in enstatite with Al incorporation studied by DFT calculations Open
The data are crystallographic information files used in submitted paper "The hydrous mechanism changes in enstatite with Al incorporation studied by DFT calculations" by Sakurai et al..
View article: The hydrous mechanism changes in enstatite with Al incorporation studied by DFT calculations
The hydrous mechanism changes in enstatite with Al incorporation studied by DFT calculations Open
The data are crystallographic information files used in submitted paper "The hydrous mechanism changes in enstatite with Al incorporation studied by DFT calculations" by Sakurai et al..
View article: Rheology of Hexagonal Close‐Packed (hcp) Iron
Rheology of Hexagonal Close‐Packed (hcp) Iron Open
The viscosity of hexagonal close‐packed (hcp) Fe is a fundamental property controlling the dynamics of the Earth's inner core. We studied the rheology of hcp‐Fe using high‐pressure and ‐temperature deformation experiments with in situ stre…
View article: Rheology of hexagonal-close packed (hcp) iron
Rheology of hexagonal-close packed (hcp) iron Open
Data used in a submitted paper "Rheology of hexagonal-close packed (hcp) iron" by Nishihara et al..
View article: Rheology of hexagonal-close packed (hcp) iron
Rheology of hexagonal-close packed (hcp) iron Open
Data used in a submitted paper "Rheology of hexagonal-close packed (hcp) iron" by Nishihara et al..
View article: Seismic Anisotropy in the Lower Mantle Transition Zone Induced by Lattice Preferred Orientation of Akimotoite
Seismic Anisotropy in the Lower Mantle Transition Zone Induced by Lattice Preferred Orientation of Akimotoite Open
Seismic anisotropy has been widely observed near the subducting slabs in the lower mantle transition zone (MTZ) and is often interpreted by the lattice preferred orientation (LPO) of constituent minerals. Akimotoite is one of the dominant …
View article: Viscosity of bridgmanite determined by in situ stress and strain measurements in uniaxial deformation experiments
Viscosity of bridgmanite determined by in situ stress and strain measurements in uniaxial deformation experiments Open
To understand mantle dynamics, it is important to determine the rheological properties of bridgmanite, the dominant mineral in Earth’s mantle. Nevertheless, experimental data on the viscosity of bridgmanite are quite limited due to experim…
View article: Deformation of Post‐Spinel Under the Lower Mantle Conditions
Deformation of Post‐Spinel Under the Lower Mantle Conditions Open
To study the viscosity of bridgmanite and ferropericlase aggregate, uniaxial compression deformation experiments on pre‐synthesized post‐spinel phase and bridgmanite two‐layered samples were conducted under top lower mantle pressure and 17…
View article: Seismic Anisotropy in the Lower Mantle Transition Zone Induced by Lattice Preferred Orientation of Akimotoite-Dataset
Seismic Anisotropy in the Lower Mantle Transition Zone Induced by Lattice Preferred Orientation of Akimotoite-Dataset Open
The dataset includes the lattice preferred orientation data of akimotoite aggregates obtained through EBSD and transmitted two-dimensional (2D) X-ray diffraction method at BL04B1 of synchrotron facility of SPring-8, Hyogo, Japan. The emplo…
View article: Seismic Anisotropy in the Lower Mantle Transition Zone Induced by Lattice Preferred Orientation of Akimotoite-Dataset
Seismic Anisotropy in the Lower Mantle Transition Zone Induced by Lattice Preferred Orientation of Akimotoite-Dataset Open
The dataset includes the lattice preferred orientation data of akimotoite aggregates obtained through EBSD and transmitted two-dimensional (2D) X-ray diffraction method at BL04B1 of synchrotron facility of SPring-8, Hyogo, Japan. The emplo…
View article: Deformation of post-spinel under the lower mantle conditions
Deformation of post-spinel under the lower mantle conditions Open
Data used in Deformation of post-spinel under the lower mantle conditions F. Xu1, 2, D. Yamazaki1, S. A. Hunt3, 2, N. Tsujino1, Y. Higo4, Y. Tange4, K. Ohara4, D. P. Dobson2 1 Institute for Planetary Materials, Okayama University, Misasa, …
View article: Deformation of post-spinel under the lower mantle conditions
Deformation of post-spinel under the lower mantle conditions Open
Data used in Deformation of post-spinel under the lower mantle conditions F. Xu1, 2, D. Yamazaki1, S. A. Hunt3, 2, N. Tsujino1, Y. Higo4, Y. Tange4, K. Ohara4, D. P. Dobson2 1 Institute for Planetary Materials, Okayama University, Misasa, …
View article: Studies of Deep Earth Rheology Based on High-Pressure Deformation Experiments Using D111-Type Apparatus
Studies of Deep Earth Rheology Based on High-Pressure Deformation Experiments Using D111-Type Apparatus Open
A new high-pressure deformation apparatus D111-type apparatus, which is a larger version of the deformation T-Cup, was recently installed on a synchrotron beamline NE7A at PF-AR, KEK, Tsukuba, Japan. In this apparatus, well-controlled defo…
View article: Phase transition of wadsleyite-ringwoodite in the Mg2SiO4-Fe2SiO4 system
Phase transition of wadsleyite-ringwoodite in the Mg2SiO4-Fe2SiO4 system Open
The Fe-bearing wadsleyite-ringwoodite phase transition loop under dry conditions in a temperature range of 1473 and 1873 K was determined by in situ X-ray diffraction experiments at the synchrotron facility SPring-8. Pressure at high tempe…
View article: Complete agreement of the post-spinel transition with the 660-km seismic discontinuity
Complete agreement of the post-spinel transition with the 660-km seismic discontinuity Open
The 660-km seismic discontinuity, which is a significant structure in the Earth’s mantle, is generally interpreted as the post-spinel transition, as indicated by the decomposition of ringwoodite to bridgmanite + ferropericlase. All precise…
View article: Rheological Study of Bridgmanite at the Lower Mantle
Rheological Study of Bridgmanite at the Lower Mantle Open
Knowledge of rheological properties of bridgmanite, which is the most abundant mineral at the lower mantle, is one of the most important parameters to understand mantle dynamics. We developed deformation experimental technique up to the to…
View article: A shallow origin of so-called ultrahigh-pressure chromitites, based on single-crystal X-ray structure analysis of the high-pressure Mg<sub>2</sub>Cr<sub>2</sub>O<sub>5</sub>phase, with modified ludwigite-type structure
A shallow origin of so-called ultrahigh-pressure chromitites, based on single-crystal X-ray structure analysis of the high-pressure Mg<sub>2</sub>Cr<sub>2</sub>O<sub>5</sub>phase, with modified ludwigite-type structure Open
The crystal structure of the high-pressure Mg2Cr2O5 phase was studied by single-crystal X-ray diffraction (XRD) analysis for the recovered samples. The 61 parameters including anisotropic displacement parameters of each atom and site occup…
View article: Generation of pressures over 40 GPa using Kawai-type multi-anvil press with tungsten carbide anvils
Generation of pressures over 40 GPa using Kawai-type multi-anvil press with tungsten carbide anvils Open
We have generated over 40 GPa pressures, namely, 43 and 44 GPa, at ambient temperature and 2000 K, respectively, using Kawai-type multi-anvil presses (KMAP) with tungsten carbide anvils for the first time. These high-pressure generations w…