EJIMA Terumi
Academic Assembly School of Science and Technology Institute of Science
Faculty of Science Department of Science Course of Geology
Assistant Professor
Researcher Information
Research activity information
Paper
- Distribution of Cr3+ between octahedral and tetrahedral sites in synthetic blue and green (CaMgSi2O6)95(CaCrAlSiO6)5-diopsides.
Masahide Akasaka, Yohei Takasu, Makoto Hamada, Mariko Nagashima, Maki Hamada, Terumi Ejima
Mineralogical Magazine, 1-44, Jan. 2019, Refereed - Oxidation states of Fe in constituent minerals of a spinel lherzolite xenolith from the Tariat depression, Mongolia: The Significance of Fe3+ in Olivine.
Terumi Ejima, Yasuhito Osanai, Masahide Akasaka, Tatsuro Adachi, Nobuhiko Nakano, Yoshiaki Kon, Hiroaki Ohfuji and Jargalan Sereenen
Minerals, 09 May 2018 - Zircon U-Pb dating of gabbro and diorite from the Bato pluton, northeast Japan
Terumi Ejima, Yoshiaki Kon, Shigenori Kawano and Daisuke Araoka
Island Arc, 26 Oct. 2017, Refereed - Precipitates within olivine phenocrysts in oxidized andesitic scoria from Kasayama volcano, Hagi, Japan
Terumi Ejima, Mari Yoneda, M.asahide Akasaka, Hiroaki Ohfuji, Yoshiaki Kon, Mariko Nagashima, and Yoshihiro Nakamuta
Island Arc, Vol.27, 2017, Refereed - Occurrence of Fe3+ and formation process of precipitates within oxidized olivine phenocrysts in basalt lava from Kuroshima volcano, Goto islands, Nagasaki, Japan.
Terumi Ejima, Masahide Akasaka, Takashi Nagao and Hiroaki Ohfuji
Mineralogical Magazine, 01 Dec. 2015, Refereed - U-Pb age distribution of plutonic rocks in the central Abukuma Plateau, northeastern Japan Arc.
Yoshiaki Kon, Terumi Ejima, Sayaka Morita and Tetsuichi Takagi
Journal of Mineralogical and Petrological sciences, 2015, Refereed - Oxidation states of Fe and precipitates within olivine from orthopyroxene-olivine-clinopyroxene andesite lava from Kasayama volcano, Hagi, Yamaguchi, Japan.
Terumi Ejima, Masahide Akasaka, Takashi Nagao and Hiroaki Ohfuji
Journal of Mineralogical and Petrological sciences, Feb. 2013, Refereed - Oxidation state of Fe in olivine in andesitic scoria from Kasayama volcano, Hagi, Yamaguchi Prefecture, Japan.
Terumi Ejima, Masahide Akasaka, Takashi Nagao and Hiroaki Ohfuji
Journal of Mineralogical and Petrological sciences, 2012, Refereed - Oxidation state of Fe in olivine in a lherzolite xenolith from Oku district, Oki-Dogo Island, Shimane Prefecture, Japan.
Terumi Ejima, Masahide Akasaka and Hiroaki Ohfuji
Journal of Mineralogical and Petrological sciences, Dec. 2011, Refereed
MISC
Lectures, oral presentations, etc.
- Zircon U–Pb ages of plutonic rocks from Iwafune area of Ibaraki Prefecture
Haruki Yamazaki , Terumi Ejima , Yoshiaki Kon , Yuki Tsunazawa
日本地球惑星科学連合2021年大会, 06 Jun. 2021Geochemical imaging of heavy-REE-rich apatite in the Pacific deep-sea mud using LA-ICPMS
Yoshiaki KON, Terumi EJIMA , Mihoko HOSHINO AND Kenzou SANEMATSU
International Symposium on Low-temperature Mineralixation, Oct. 2019Oxidation States of Fe and Inclusions in Olivine from Esquel Pallasite
Terumi Ejima, Azumi Yoneyama, Yoshiaki Kon, Masahide Akasaka, Kouki Yoshida and Takafumi Hirata
Goldschmidt 2019, Aug. 2019Oxidation states of Fe in constituent minerals of a spinel lherzolite xenolith from the Tariat Depression, Mongolia.
Terumi Ejima, Yasuhito Osanai, Masahide Akasaka et al.
Aug. 2018Distribution of rare earth elements within apatite in fish debris from the Heavy REE-rich deep-sea mud of the Minami-Tori-shima Area, Southeastern Japan.
Terumi Ejima, Yoshiaki Kon, Mihoko Hoshino et al.
International Mineralogical Association, Aug. 2018Distribution and Concentration Process of Rare Earth Elements in Apatite of the Heavy REE-Rich Deep-Sea Mud from the Minami-Torishima Area, Japan.
Terumi Ejima, Yoshiaki Kon, Mihoko Hoshino, Kenzo Sanematsu, Daisuke Araoka
Goldschmidt, Jun. 2016Geochemical Characteristics of Granitic Rocks Underlying Ion-Adsorption Type REE Deposits.
Kenzo Sanematsu, Terumi Ejima, Yoshiaki Kon and Yasushi Watanabe
Goldschmidt, Jun. 2016Geochemical characteristics of apatite in Heavy-REE-rich deep-sea mud from Minami-Torishima area, southeastern Japan.
Yoshiaki Kon, Mihoko Hoshino, Kemzo Sanematsu, Sayaka Morita, Miko Tsunematsu, Terumi Ejima, Nobuyuki Okamoto, Nobuyuki Yano, Mikiya Tanaka and Tetsuichi Takagi
Goldschmidt, Jun. 2016Rapid and precise determination of major and trace elements in CCRMP and USGS geochemical reference samples using femtosecond laser ablation ICP-MS.
Yoshiaki Kon, Daisuke Araoka, Terumi Ejima, Takafumi Hirata and Tetsuichi Takagi
Symposium on Strategic and Critical Materials, Nov. 2015Determination of major and trace elements in GSJ geochemical reference samples using galvanometric LA-ICPMS.
Yoshiaki Kon, Daisuke Araoka, Terumi Ejima, Takaomi Yokoyama and Takafumi Hirata
Goldschmidt, Aug. 2015Crystal Chemistry of Vanadium-Rich Garnet from the Sor Rondane Mountains, East Antarctica.
Masahide Akasaka, Mio Hirata, Yasuhito Osanai, Maki Hamada, Mariko Nagashima, Kuniaki Makino and Terumi Ejima
Goldschmidt, Aug. 2015Evidence of subsolidus oxidation for olivine phenocryst in apparently unaltered basalt lava.
Terumi Ejima, Masahide Akasaka, Takashi Nagao and Hiroaki Ohfuji
Aug. 2015, GoldschmidtSpatial U-Pb age distribution of plutonic rocks in the central Abukuma plateau.
Yoshiaki Kon, Terumi Ejima, Gen Shimoda, Daisuke Araoka and Tetsuichi Takagi
7th International SHRIMP workshop, Sep. 2014Preparation of apatite standard for multi-isotope measurements by SHRIMP and application to rare-earth-rich apatite for constraint on the genesis of rare earth deposits.
Daisuke Araoka, Yoshiaki Kon, Terumi Ejima and Tetuichi Takagi
7th International SHRIMP workshop, Sep. 2014Ferric iron within olivine in a lherzolite xenolith from Oku district, Oki-Dogo Island, Shimane Prefecture, Japan.
Terumi Ejima, Masahide Akasaka and Hiroaki Ohfuji
Sep. 2014, 21th General Meeting of the International Mineralogical AssociationEffect of high temperature oxidation on ferric iron and precipitates in olivine from andesitic scoria of Kasayama volcano, Japan.
Terumi Ejima, Masahide Akasaka, Takashi Nagao and Hiroaki Ohfuji
European Mineralogical Conference, Sep. 2012X-ray and neutron Rietveld study of synthetic Ca2Al3-pMn3+pSi3O12(OD)-piemontite.
Masahide Akasaka, Mariko Nagashima, Maki Hamada, Asami Sano and Terumi Ejima
20th General Meeting of the International Mineralogical Association, Aug. 2010Oxidation state of Fe and precipitates in olivine from scoria and lava of Kasayama volcano, Yamaguchi, Japan.
Terumi Ejima, Masahide Akasaka and Takashi Nagao
Aug. 2010, International Mineralogical Association