` Pheasant Memorial Laboratory

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.

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日本の小惑星探査機「はやぶさ2」の探査対象であった小惑星リュウグウから回収された 16 粒子を用いて、詳細な地球化学総合解析を行いました。その結果、小惑星物質試料が太陽系形成前から現在に至る複雑な物理化学過程の証拠を保持していることがわかり、生命の起源を含む太陽系物質進化の新しい描像を導くに至りました。

... 続きを読む

LATEST PUBLICATIONS

2022


Eizo Nakamura, Katsura Kobayashi, Ryoji Tanaka, Tak Kunihiro, Hiroshi Kitagawa, Christian Potiszil, Tsutomu Ota, Chie Sakaguchi, Masahiro Yamanaka, Dilan M. Ratnayake, Havishk Tripathi, Rahul Kumar, Maya-Liliana Avramescu, Hidehisa Tsuchida, Yusuke Yachi et al., On the origin and evolution of the asteroid Ryugu: A comprehensive geochemical perspective, Proceedings of The Japan Academy, Series B, 98(6), 227-282 (2022).

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Nghiem Van Dao, Hiroshi Kitagawa, Eizo Nakamura, Katsura Kobayashi,Thanh Xuan Ngo, Son Hai Trinh. Bilateral Heterogeneity in an Upwelling Mantle via Double Subduction of Oceanic Lithosphere, Journal of Geophysical Research: Solid Earth, 127, e2021JB023328 (2022).

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Havishk, Christian Potiszil, Ryoji Tanaka, Eizo Nakamura. The ice-organic-silicate contents of small Solar system bodies: indicators for a comet to asteroid evolutionary pathway, Monthly Notices of the Royal Astronomical Society, 513(3), pp. 3734-3741 (2022).

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Gray E. Bebout, Tsutomu Ota, Takuya Kunihiro, William D. Carlson, Eizo Nakamura. Lithium in garnet as a tracer of subduction zone metamorphic reactions: The record in ultrahigh-pressure metapelites at Lago di Cignana, Italy, Geosphere (2022).

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SEMINAR, SYMPOSIUM & WORKSHOP

2021-2022


January 25, 10:00 AM in 3F Seminar Room
Seminar by Wei Zhang


October 12, 10:00 AM in 3F Seminar Room
Seminar by Havishk Tripathi


October 5, 10:00 AM in 3F Seminar Room
Seminar by Wei Zhang


September 28, 10:00 AM in 3F Seminar Room
Seminar by Rahul Kumar


September 21, 10:00 AM in 3F Seminar Room
Seminar by Nurcan Kucukarslan


September 7, 10:00 AM in 3F Seminar Room
Seminar by Dilan Ratnayake


August 24, 10:00 AM in 3F Seminar Room
Seminar by Avramescu Maya-Liliana



SOCIAL MEDIA