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Iwatsuki, Teruki; Yoshida, Haruo; Kato, Osamu*; Imakita, Tsuyoshi*; Kurimoto, Noritaka*; Hama, Katsuhiro
no journal, ,
no abstracts in English
Umeda, Koji; Asamori, Koichi; Ninomiya, Atsushi; Negi, Tateyuki
no journal, ,
no abstracts in English
Hanamuro, Takahiro; Umeda, Koji; Tomiyama, Shingo*
no journal, ,
no abstracts in English
Mizuno, Takashi; Hama, Katsuhiro
no journal, ,
no abstracts in English
Ninomiya, Atsushi; Negi, Tateyuki; Umeda, Koji; Asamori, Koichi
no journal, ,
no abstracts in English
Yamada, Kunimi; Hanamuro, Takahiro; Tagami, Takahiro*; Yamada, Ryuji*; Umeda, Koji
no journal, ,
Japan Atomic Energy Agency have jointly set up the lab of the (U-Th)/He dating in cooperation with Kyoto University. At the present stage, samples are apatite and zircon. Infrared laser heating in vacuum chamber extracts helium. The helium is quantified using the MM5400 rare gas mass spectrometer and the sensitivity method. The sensitivity of the mass spectrometer is calibrated using standard air, a volume-known pipette, and a capacitance manometer. The ICP quadrupole mass spectrometer quantifies uranium and thorium using standard addition method after dissolution of the gas-extracted sample. Apatite is dissolved using HNO
and zircon is decomposed by the alkali-fusion method using XRF bead sampler and LiBO. We are performing the calibration of MM5400 and testing dissolution procedures for ICP at present, and will report detailed views of dating systems in addition to them.
Yoshida, Haruo; Iwatsuki, Teruki; Hama, Katsuhiro
no journal, ,
no abstracts in English
Niwa, Masakazu; Takada, Keita*; Kinoshita, Hirohisa*
no journal, ,
no abstracts in English
Dia, C.*; Takagi, Hisanori*; Kojima, Satoru*; Otani, Tomoyuki*; Amano, Kenji
no journal, ,
no abstracts in English
Tajikara, Masayoshi; Takada, Keita*; Nohara, Tsuyoshi
no journal, ,
no abstracts in English
Nohara, Tsuyoshi; Niwa, Masakazu; Yasue, Kenichi; Shimada, Koji
no journal, ,
This research examined the investigation technique which grasps the crush zone of the active fault in the deep underground based on the data of the tunnel using the relation between the amount of accumulation displacement of a dislocation, and the width of a crush zone. From the data of drilling performed in the tunnel, the position of the crush zone of the active fault which displacement concentrated was pinpointed. The size of the width of the crush zone was in agreement with it which was presumed from the relation with the amount of accumulation displacement. A possibility that the crush zone of an active fault could be specified was shown from displacement of a stratum, the development situation of fault clay, and the trend of striation as a result of this research.
Uehara, Shinichi*; Shimamoto, Toshihiko*; Kurikami, Hiroshi; Funaki, Hironori; Onishi, Yuzo*
no journal, ,
no abstracts in English
Shimada, Koji; Niwa, Masakazu; Nohara, Tsuyoshi
no journal, ,
no abstracts in English
Saito, Tatsuo; Asamori, Koichi; Umeda, Koji
no journal, ,
no abstracts in English
Niizato, Tadafumi; Yasue, Kenichi; Shigeno, Kiyoyuki*; Miyasaka, Shogo*
no journal, ,
The landform in the Hokushin district, Horonobe, northern Hokkaido is developing under the influence of the "rock-control" based on the difference of drainage pattern, relief energy, drainage density, and distribution of landslide in each formation.
Kawamura, Makoto; Oi, Takao; Umeda, Koji; Niizato, Tadafumi; Ebashi, Takeshi; Kitamura, Akira; Kawachi, Susumu; Makino, Hitoshi; Ishimaru, Tsuneari; Yanagawa, Harunaga*; et al.
no journal, ,
no abstracts in English
Kawamura, Makoto; Oi, Takao; Umeda, Koji; Niizato, Tadafumi; Makino, Hitoshi; Kawachi, Susumu; Ishimaru, Tsuneari; Yanagawa, Harunaga*; Okubo, Hiroo*
no journal, ,
no abstracts in English
Ebashi, Takeshi; Kitamura, Akira; Kawamura, Makoto; Oi, Takao; Makino, Hitoshi; Kawachi, Susumu; Ishimaru, Tsuneari
no journal, ,
no abstracts in English
Osawa, Takahito
no journal, ,
I present extraterrestrial noble gas compositiones trapped in micrometeorites.
Fukazawa, Hiroshi
no journal, ,
Whether ferroelectric ice XI exists in the outer solar system attracts much interest, because long range electrostatic forces are aused by the erroelectricity. Future plans for finding natural ice XI in space will be important issues in planetary science. We have been investigating how to make perfect ice XI by time-resolved neutron diffraction measurements. We report the detail of our recipe for the making ice XI in the laboratory. The results present useful information for infrared observation studies of iceobjects in the solar system and the Galaxy.