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Fumio Kitajima Last modified date:2023.11.27

Assistant Professor / Material Science of Solar Planets
Department of Earth and Planetary Sciences
Faculty of Sciences

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Laboratory of Organic Geoscience .
Academic Degree
Field of Specialization
Outline Activities
Organic substances play an important role in many geochemical processes. I would like to clarify geochemical processes from the viewpoint of the behavior of organic matter. The followings are my main research topics, and I have classes to teach fundamental techniques of chemistry.

1. The organic matter in meteorites.
Organic matter in meteorites records its origin and several events in the early solar in their structure and isotopic composition. The characteristics of the matter reveal the thermal history of meteorites in their parent bodies.

2. Biomarkers in hydrothermal systems.
Thermophiles are rather primitive microorganisms. The biomakers produced by them are useful to evaluate their ecosystem. I also try to develop new biomarker.

3. Organic substances in sediments.
Organic substances in sediments are useful to clarify palaeo-environments and the processes of diagenesis.

4. Research for antifoulig substances
Research Interests
  • Carbonaceous matter in meteorites
    keyword : Carbonaceous chondrite, Carbonaceous matter, Thermal Metamorphism, Aqueous alteration, Pyrolysis-GC, XAFS, Micro-Spectroscopy
    2000.04An evaluation of the degree of alteration and thermal metamorphism of carbonaceous chondrites from the viewpoint of carbonaceous macromolecular matter. Carbonaceous chonfrites are most primitive matter in the solar system. However, they suffered aqueous alteration and/or thermal metamorphism in their parent bodies. We evaluated the degree of thermal metamorphism of CM chondrites from the viewpoint of graphitization of the carbonaceous matter in the chondrites using pyrolysis gas chromatography and X-ray absorption fine structure spectroscopy..
  • Development of a new biomarker in microbial origin in hydrothermal system
    keyword : Thermophile, Archaea, Ether lipid, Biomarker, Sediment
    2000.04Development of a new biomarker in microbial origin in hydrothermal system. Thermophiles, that are rather primitive microorganisms are found in some hot springs. We focused on a characteristic ether lipid produced by a thermoacidophilic archaeon, the genus Sulfolobus, and developed a new biomarker/geothermometer. We estimated its biomass and growth temperature using the lipid preserved on the sediments of hot springs in Krishima area..
  • A study of palaeo-microbial ecosystem and diagenesis using biomarkers in sediments.
    keyword : Biomarker, Sediments in hydrothermal system, Hyrothermal vents on deep-sea floor, Microbial ecosystem, Diagenesis
    2000.04A study of palaeomicrobialecology and diagenesis using biomarkers in sediments. We focused on hydothermal system, where primitive microorganisms are often found. We analyzed the organic compounds in sediments of land hot springs, dissolved organic matter in the hot water from hyrothermal vents on deep-sea floor, and organics in Precambrian cherts, searching for biomarkers in microbial origin, in order to evaluate the microbial ecosystems and the processes of diagenesis..
Academic Activities
1. Fumio Kitajima, Masayuki Uesugi, Yuzuru Karouji, Yukihiro Ishibashi, Toru Yada, Hiroshi Naraoka, Masanao Abe, Akio Fujimura, Motoo Ito, Hikaru Yabuta, Hajime Mita, Yoshinori Takano, Tatsuaki Okada, A micro-Raman and infrared study of several Hayabusa category 3 (organic) particles, Earth Planets and Space, 67, 20, 2015.02.
2. Geology of 3.2Ga Dixon Island Formation, Western Pilbara, Australia -Part 6-
-Characterization of carbonaceous matter in the black cherts-
F.Kitajima, S.Kiyokawa, T.Ito, and M.Ikehara.
3. Kitajima F., Nakamura T., Takaoka N., and Murae T., Evaluating the thermal metamorphism of CM chondrites by using the pyrolytic behavior of the carbonaceous macromolecular matter., Geochim. Cosmochim. Acta., 10.1016/S0016-7037(01)00758-X, 66, 1, 163-172, Vol. 66, 163-172., 2002.01.