Our goal is to describe atoms that represent element distribution of the Solar system that are continuously evolving from the beginning to the future. To understand the Solar system with spatial scale 1013 m, we analyze planetary materials that are from different origin with different processes, and determine element and isotope compositions with spatial resolution down to 10-9 m.

Planetary materials besides terrestrial ones are the rolling stones that are sampled with locality unknown. To fill the important missing information, we developed a protocol that is to determine multiple-elements, multiple-isotopes, and multiple-phases. We referred the approach to be 'comprehensive' and construct an analytical system that let us do so. The system acts as a gigantic machine with numerous instruments glued by analytical methods and disciplined people. The disciplines and samples would be taken over to the next generation to sustain our science.

We work as a team and prefer arguments scientifically.

LATEST NEWS


On the origin and evolution of the asteroid Ryugu: A comprehensive geochemical perspective

06/10/2022

A team of scientists undertake a comprehensive analysis of samples returned from the Japan Aerospace Exploration Agency’s Hayabusa2 mission and provide invaluable insights into the formation and evolution of our solar system. [ ... Read More ... 続きを読む ]

LATEST PUBLICATIONS

2023-2024


Li, Y.Q, Kitagawa, H., Ma, C.Q., Nakamura, E., Sakaguchi, C., Kobayashi, K., Hu, X.Y. Deep recycling of volatile elements in the mantle: Evidence from the heterogeneous B isotope in intra-plate basalts. Geoscience Frontiers, 15(6), 101900 (2024).

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Auer, A., Belousov, A., Belousova, M., Kitagawa, H., Kobayashi, K. Tridymite formation as a direct consequence of explosive volcanism – evidence preserved in tuffisite veins and concurrently erupted volcanic ash. New Zealand Journal of Geology and Geophysics, pp.1-15 (2024).

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Kitagawa, Y., Nakao, A., Tanaka, R., Takeda, A., Yamada, D., Evrard, O., & Yanai, J. Relative importance of Asian-dust-derived micas estimated from oxygen isotopic analysis of fine quartz on specific retention of radiocesium in Andosols in Tohoku Region, Japan, Soil Science and Plant Nutrition, 70 (5–6), pp.375–386 (2024).

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Christian Potiszil, Tsutomu Ota and Eizo Nakamura. Reconciling remote-sensing estimates of Ryugu’s albedo with laboratory measurements, Nature Astronomy (2024).

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Ryoji Tanaka, Dilan M. Ratnayake, Tsutomu Ota, Noah Miklusicak, Tak Kunihiro, Christian Potiszil, Chie Sakaguchi, Katsura Kobayashi, Hiroshi Kitagawa, Masahiro Yamanaka et al . Unraveling the Cr Isotopes of Ryugu: An Accurate Aqueous Alteration Age and the Least Thermally Processed Solar System Material, The Astrophysical Journal, 965(1), 52 (2024).

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Dilan M. Ratnayake, Ryoji Tanaka and Eizo Nakamura. Determination of mass-dependent chromium isotopic compositions in geological samples by double spike-total evaporation-thermal ionization mass spectrometry (DS-TE-TIMS), Analytica Chimica Acta, 1278, 341723 (2023).

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SEMINAR, SYMPOSIUM & WORKSHOP

2024


November 19, 10:00 AM in 3F Seminar Room
Seminar by Ms. Esmira Bibaj (PhD Candidate at Lehigh University)


November 5, 10:00 AM in 3F Seminar Room
Seminar by Mr. Adam Greig Corbett (PML)


October 22, 10:00 AM in 3F Seminar Room
Seminar by Mr. Rahul Kumar (PML)


October 15, 10:00 AM in 3F Seminar Room
Seminar by Mr.Torii Douglas-Song (PML)


October 8, 10:00 AM in 3F Tee Room
Seminar by Mr. Juan Felipe Bustos Moreno (Lehigh University, USA)


July 26, 10:00 AM in 3F Tee Room
Seminar by Dr. Wentao Cao (State University of New York at Fredonia)


June 21, 10:00 AM in 3F Tee Room
Seminar by Prof. María Isabel Marín-Cerón (EAFIT University, School of Applied Sciences and Engineering, Colombia)


May 21, 10:00 AM in 3F Seminar Room
Seminar by Dr. Natalia Pravikova (Lomonosov Moscow State University)


February 21, 10:00 AM in 3F Seminar Room
Interim defence presentation by Noah Miklusicak


February 9, 13:30 in 3F Seminar Room
PhD defence presentation by Dilan M. Ratnayake


January 31, 10:00 AM in 3F Tea Room
Seminar by Alebachew Tareke Kehali (The United Graduate School of Agricultural Sciences, Tottori University)




SOCIAL MEDIA