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A joint seminar camp with Ohta Lab and Sinmyo Lab was held!

A joint seminar camp (2024.03.18-20) was held with Ohta Laboratory (Tokyo Institute of Technology) and Sinmyo Laboratory (Meiji University), both working on high-pressure Earth science research similar to the Hirose Lab.

The seminar presentations covered a wide range of topics, including high-pressure technology development and research on organic materials, which are not commonly discussed within the Hirose Lab. This provided us with the opportunity to explore various fields.

Furthermore, during breaks in the seminar, everyone enjoyed a softball and football game. Hirose-sensei, Ohta-sensei, and Sinmyo-sensei joined us at the game, which was a very good chance to deepening friendships.

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We will attend AGU23!

AGU23 will be held in San Francisco, U.S.A., from December 11 to 15.
Eight members from Hirose lab will participate and make talks and posters.

The following is the presentation by Hirose Lab.

【Monday, 11 December】
DI13A-04: 14:42 – 14:52
Electrical Conductivity of Superionic Hydrated SiO2: Implications for High Conductivity Anomalies Beneath Subduction Zones
Mako Inada, Yoshiyuki Okuda, Kei Hirose, Kenta Oka, Hideharu Kuwahara and Steeve Gréaux

【Tuesday, 12 December 2023】
MR21C-0069: 08:30 – 12:50
Liquid Density of Fe-H Alloys in Earth’s Outer Core
Suyu Fu, Kei Hirose, Shunpei Yokoo and Fumiya Sakai

DI23B-0027: 14:10 – 18:30
The Solubility of Helium in Iron at High Pressures; Helium in the Earth’s Core?
Haruki Takezawa and Kei Hirose

【Wednesday, 13 December 2023】
DI31B-0011: 08:30 – 12:50
The Effect of Hydrogen on the Metal-Silicate Partitioning of Sulfur
Shunpei Yokoo, Naoya Sakamoto, Kei Hirose, Yutaro Tsutsumi and Hisayoshi Yurimoto

【Thursday, 14 December 2023】
MR42A-05: 11:06 – 11:16
S-rich Sulfide Fe12S7 may Crystallize in the Martian Core
Fumiya Sakai, Kei Hirose, Hitoshi Gomi and Nozomu Hiraoka

MR42A-08: 11:39 – 11:49
The Fe-FeH Phase Diagram to Core Pressures by Experiments and Thermodynamic Modeling and the Possible Range of Earth’s Core Composition
Kei Hirose, George R Helffrich, Suyu Fu, Shoh Tagawa, Nagi Ikuta, Naoya Sakamoto and Hisayoshi Yurimoto

MR43C-0111: 14:10 – 18:30
Eutectic Melting Curve for the Fe-FeH System
Shuhei Mita, Suyu Fu and Kei Hirose

【Friday, 15 December 2023】
DI51B-0005: 08:30 – 12:50
Al-Bearing Hydrated SiO2 in Subducted MORB Crust Does Not Dehydrate at the Core-Mantle Boundary
Yutaro Tsutsumi, Naoya Sakamoto, Kei Hirose and Hisayoshi Yurimoto

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Hirose Lab. presentations @ AGU Fall meeting 2019

[Oral]

Monday, 9 / 09:35 – 09:40 / Moscone South – Hall D, Inspire Stage – Centennial Central
U11D – SiO2 and molten silicate release from the core; implications for dynamo and material transport from the core to mantle (Invited)
Kei Hirose

Monday, 9 / 17:15 – 17:30 / Moscone South – 151, Upper Mezz.
DI14A-06 – Inner core crystallization through the F-layer as a constraint for core composition
Irene Bonati, Marine Lasbleis, John W Hernlund and Kei Hirose

Tuesday, 10 / 17:45 – 18:00 / Moscone South – 152, Upper Mezz.
MR23A-07 – Thermal Conductivity of CaSiO3 Perovskite at Lower Mantle Conditions (Invited)
Zhen Zhang, Kotaro Onga, Dong-Bo Zhang, Akira Hasegawa, Kenji Ohta, Tao Sun, Kei Hirose and Renata Wentzcovitch

Tuesday, 10 / 17:45 – 18:00 / Moscone South – 152, Upper Mezz.
MR24A-08 – Evaluating self-diffusion coefficient of iron under high pressure by a combination of resistive-heated diamond anvil cell and secondary ion mass spectrometry
Yohan Park, Kenji Ohta, Shoichi Itoh and Kei Hirose

Wednesday, 11 / 13:40 – 13:55 / Moscone South – 152, Upper Mezz.
MR33A-01 – Hydrogen Limits Carbon in Liquid Iron (Invited)
Kei Hirose, Shoh Tagawa, Yasuhiro Kuwayama, Ryosuke Sinmyo and Guillaume Morard

Thursday, 12 / 10:38 – 10:52 / Moscone South – 303-304, L3
U42B-02 – Transfer of SiO2 from the core to the mantle and its fate in the Earth in early and present times
George R Helffrich, Maxim Ballmer, Guillaume Morard, Koichiro Umemoto, Ryuichi Nomura, Ryosuke Sinmyo, Anat Shahar, Stephane Labrosse, John W Hernlund and Kei Hirose

Friday, 13 / 08:15 – 08:30 / Moscone South – 152, Upper Mezz.
MR51A-02 – Core-mantle partitioning of hydrogen (Invited)
Kei Hirose, Shoh Tagawa, Naoya Sakamoto, Yasuo Ohishi and Hisayoshi Yurimoto

[Poster]
Tuesday, 10 / AM
DI21A-0010 – Core Isotopes Without Core Siderophiles
John W Hernlund, Kang Wei Lim, Irene Bonati, Scott David Hull and Kei Hirose

Tuesday, 10 / PM
DI23B-0039 – Electrical resistivity saturation in hcp Fe-Si alloys at high P-T conditions
Hayato Inoue, Sho Suehiro, Kenji Ohta, Kei Hirose and Yasuo Ohishi

Tuesday, 10 / PM
DI23B-0049 – Electrical resistivity of fcc phase of iron hydrides at high pressures and temperatures
Kenji Ohta, Sho Suehiro, Kei Hirose and Yasuo Ohishi

Tuesday, 10 / PM
DI23B-0058 – Sound velocity measurements on hcp-FeHx (x<1) under high pressures by femtosecond pulse laser pump-probe technique
Tatsuya Wakamatsu, Kenji Ohta, Shoh Tagawa, Takashi Yagi, Kei Hirose and Yasuo Ohishi

Tuesday, 10 / PM
DI23B-0061 – Melting in the Fe-O-H system at 40 GPa
Kenta Oka, Kei Hirose, Shoh Tagawa and Yasuo Ohishi

Tuesday, 10 / PM
DI23B-0063 – Mutual Exclusivity between Si and H in Solid Iron under High Pressure
Koutaro Hikosaka, Kei Hirose and Shoh Tagawa

Wednesday, 11 / AM
DI31B-0010 – High P-T thermal conductivity measurements using externally- and laser-heated DAC on MgSiO3 bridgmanite and Fe-bearing post-perovskite
Yoshiyuki Okuda, Kenji Ohta, Akira Hasegawa, Takashi Yagi, Kei Hirose, Saori Imada and Yasuo Ohishi

Wednesday, 11 / AM
DI31B-0011 – Thermal conductivity of MgO periclase up to 140 GPa and 2000 K
Akira Hasegawa, Kenji Ohta, Takashi Yagi and Kei Hirose

Friday, 13 / AM
MR51D-0082 – Liquid Immiscibility in the Fe-S-H System at Conditions of Earth’s Core Formation
Shunpei Yokoo, Kei Hirose and Shoh Tagawa

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Our presentations at AGU Fall meeting 2018

Some of the lab members will attend AGU Fall Meeting 2018 held in Washington D.C.
See you there!

【Oral】
DI51A-02 Exsolution of SiO2 crystals and silicate melt from the liquid core: Implications for the origins of mid-lower mantle scatters and the ultra-low velocity zone above the CMB
Kei Hirose, Friday 08:15 – 08:30 Marriott Marquis – Archives

MR42A-06 Melting experiments on the Fe–C binary system up to 255 GPa: Constraints on the carbon content in the Earth’s core
Izumi Mashino (PD), Thursday 11:35 – 11:50 Marriott Marquis – Capitol/Congress

【Poster】
MR23B-0103 Melting curve of iron to 290 GPa determined in a resistance-heated diamond-anvil cell: implications for the Earth and planetary core
Ryosuke Shinmyo, Tuesday Afternoon

DI43C-0033 Phase relations in non-stoichiometric FeHx at high pressures
Shoh Tagawa (D2), Thursday Afternoon

DI11B-0011 Experimental Determination of Eutectic Liquid Compositions in the MgO–SiO2System to the Lowermost Mantle Pressures
Keisuke Ozawa (M1), Monday Morning

MR43B-0095 Crystallization of Liquid Fe-S-O at ICB Conditions 
Shunpei Yokoo (B4), Thursday Afternoon

MR23B-0102 Stability of Fe5O6 at High Pressure and Temperature
Koutaro Hikosaka (B4), Tuesday Afternoon

MR33C-0142 Structure measurements of MgSiO3 and CaSiO3 glasses at high pressure
Ryota Tomida (B4), Wednesday Afternoon

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Our presentations at JpGU 2018

Some colleagues have a presentation at JpGU 2018.
The list of our presentations is following.

【5/22】
◯Oral
[SIT27-04] Melting phase relations in binary and ternary iron alloys and possible compositional range for the outer core
★Invited Papers
*Kei Hirose、Koichiro Umemoto
Abstract
◯Poster
[SIT22-P15] Melting of iron to 290 gigapascals
*Ryosuke Sinmyo、Kei Hirose、Yasuo Ohishi
Abstract

【5/24】
◯Oral
[SMP38-13] Stability of Mg(OH)2 brucite at high pressure and high temperature
*Koki Masuda、Izumi Mashino、Kei Hirose
Abstract

[SMP38-17] Melting experiments on the MgO–MgSiO3 system to lowermost mantle pressures
*Keisuke Ozawa、Miyuki Anzai、Kei Hirose、Ryosuke Sinmyo、Shigehiko Tateno
Abstract

[SMP38-18] Melting experiments on Fe-O-S alloys to core pressures
*Shunpei Yokoo、Kei Hirose、Ryosuke Sinmyo
Abstract

◯Poster
[SMP38-P04] Melting experiments on the MgSiO3-SiO2 system to deep lower mantle pressures
*Miyuki Anzai、Keisuke Ozawa、Kei Hirose、Ryosuke Sinmyo、Shigehiko Tateno
Abstract