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Hisayoshi Yurimoto
Pages
102-
Published: 2016
Released on J-STAGE: November 09, 2016
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Are spectrometers in your laboratory useful to analyze your geochemical problems? Are state-of-the-art spectrometers in the world useful to analyze your geochemical problems? Do you need to invent novel spectrometers to analyze your geochemical problems? I would like to discuss with peoples who answer YES for the last question. Why do we want to invent novel analyzers beyond state-of-the-art spectrometer? Because new geochemical problems, which are difficult to solve by use of state-of-the-art spectrometers, are discovered by yours. Development of novel spectrometers begins collaboration between new types of physics and chemistry, and advance towards discovery of new spectrometer. I would like to discuss the case of isotope microscope, as an example that discovery on geochemistry has been made by an invention of new spectrometer.
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Yu Jae―Young
Pages
103-
Published: 2016
Released on J-STAGE: November 09, 2016
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This presentation provides the basic information on schwertmannite, compares the solubility values from different studies, and then discusses the possible reasons causing the differences in the solubility. It may help those who study schwertmannite, acid mine drainage, low temperature thermodynamics, and after all aqueous geochemistry.
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Keisuke Nagao
Pages
104-
Published: 2016
Released on J-STAGE: November 09, 2016
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My experience of cooperative research work between Japan and Korea continued for 25 years will be presented.
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Ahn Insu
Pages
105-
Published: 2016
Released on J-STAGE: November 09, 2016
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The results of our study show that deep thermal groundwater in Korea is clustered into three major types. These are 1) alkaline water with high pH, 2) CO2-rich acidic water, and 3) saline water with high TDS. Among them, the first type is predominant and occurs preferentially in granitic rocks. The relationships between physicochemical variables illustrate that hydrochemistry of each groundwater type is mainly evolved through distinct paths of water-rock interaction but is modified by varying degree of mixing with dilute shallow groundwater during ascent.
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Kana Nagashima, Kiseong Hyeong, Inah Seo
Pages
106-
Published: 2016
Released on J-STAGE: November 09, 2016
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Lee Seung―Gu, Kim Kyoung―Ho, Yoshihiro Asahara, Tsuyoshi Tanaka, Lee S ...
Pages
107-
Published: 2016
Released on J-STAGE: November 09, 2016
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Rare earth element (REE) patterns normalized by chondrite have been used as one of useful tools in geochemical and cosmochemical studies. Especially, REE tetrad pattern has been considered as an example of a specific REE fractionation in geologic systems such asevolved or highly-fractionated granites under the condition that the REE measurement were performed at reasonable precision and accuracy. The Muamsa, Weolaksan and Sokrisan granites(MWS granites) are ones of the Cretaceous granites in the South Korea, which are highly evolved, fractionated I?type granite with geochemical characteristics of A?type granite and REE-tetrad pattern. In order to understand 1) the behavior of magnesium and oxygen isotope system during the emplacement of the highly fractionated granite and 2) the relationship among magnesium and oxygen isotopes and REE tetrad effect, we investigated the geochemical characteristics of magnesium and oxygen isotope composition from the MWS granites.
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Yuichiro Ueno, Yoshiaki Endo
Pages
108-
Published: 2016
Released on J-STAGE: November 09, 2016
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Photochemistry of sulfur dioxide yields anomalous sulfur isotope fractionation under anoxic atmosphere. The isotope anomaly can be transported into sedimentary sulfide and sulfate, thus is useful to trace atmospheric chemistry before the Great Oxidation Event (GOE) at about 2.3 billion years ago. Based on the isotopic analysis of Archean sedimentary rocks, the δ36S/δ33S trend seems to have changed through time, though the factors controlling the δ36S/δ33S signal are still uncertain. Our new laboratory experiments have shown that the δ36S/δ33S trend are mainly controlled by pSO2 and redox state of the atmosphere even without molecular oxygen. Thus, the observed change of the sulfur isotopic signal may reflect volcanic SO2 flux as well as redox fluctuation before GOE. Furthermore, our results indicate that the Archean atmosphere is not the pure CO2, but should be more reducing to explaining the observed δ36S/δ33S trend in the Archean rocks.
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Tsuyoshi Tanaka
Pages
109-
Published: 2016
Released on J-STAGE: November 09, 2016
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Yuma Watanabe, Sakae Toyoda, Naohiro Yoshida, Tomohiro Shimada, Shuji ...
Pages
112-
Published: 2016
Released on J-STAGE: November 09, 2016
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Sakae Toyoda, Yuma Watanabe, Naohiro Yoshida, Toshinobu Machida, Yasun ...
Pages
113-
Published: 2016
Released on J-STAGE: November 09, 2016
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Song Xiao Jing, Saori Kakuyama, Koichi Watanabe, Chinatsu Yachi, Miyuk ...
Pages
114-
Published: 2016
Released on J-STAGE: November 09, 2016
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LE DONG, Hisayuki Yoshikawa, Yasunori Tohjima, Hidekazu Matsueda
Pages
115-
Published: 2016
Released on J-STAGE: November 09, 2016
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Koichi Watanabe, Ryosuke Ejiri, Taiki Hirai, Kohei Takatsuji, Jin Shen ...
Pages
116-
Published: 2016
Released on J-STAGE: November 09, 2016
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Shengjun Jin, Kensuke Fukai, Nobuhiro Yamazaki, Kenji Sato, Hiroki Tak ...
Pages
117-
Published: 2016
Released on J-STAGE: November 09, 2016
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Hideki Minami, Aoi Okuda, Lai Zhang, Asami Mashio, Hajime Obata
Pages
118-
Published: 2016
Released on J-STAGE: November 09, 2016
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Hiroyuki Hyono, Atushi Matsuki, Kento Kinouchi
Pages
119-
Published: 2016
Released on J-STAGE: November 09, 2016
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Yusuke Miki, Sayako Ueda, Kazuhiko Miura, Yoko Iwamoto, Hiroki Kato, H ...
Pages
120-
Published: 2016
Released on J-STAGE: November 09, 2016
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Takahiro Matsuda, Yosuke Kawai, Kohei Miya, Jun Aoki, Toshinobu Hondo, ...
Pages
121-
Published: 2016
Released on J-STAGE: November 09, 2016
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Oonishi Tsuyoshi, Hiroshi Hidaka, Yasuhiro Shimizu, Sera Kouhei
Pages
122-
Published: 2016
Released on J-STAGE: November 09, 2016
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Kohei Miya, Kentaro Terada, Hikaru Yabuta, Yosuke Kawai, Takahiro Mats ...
Pages
123-
Published: 2016
Released on J-STAGE: November 09, 2016
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Hitomi Abe, Kazushi Fukuda, Yoshiyuki Oguri, Hajime Mita, Takahito Ouc ...
Pages
124-
Published: 2016
Released on J-STAGE: November 09, 2016
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Yuki Hibiya, Tsuyoshi Iizuka
Pages
125-
Published: 2016
Released on J-STAGE: November 09, 2016
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Shoki Kurokawa, Hirotsugu Iwano, Fumiaki Okumura
Pages
126-
Published: 2016
Released on J-STAGE: November 09, 2016
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The Kimmeridge Formation is the highest quality oil-prone source rock in this well. The other formations below the Kimmeridge also exhibit some degree of source rock potential. The maturity reaches peak oil generation stage in the Lower Pentland Formation. Althogh the Kimmeridge Formation is in immature to early mature stage at this well, it is expected to have generated large amounts of oil and gas in the deeper mature basin area.
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Yasuhiro Oba, Yoshinori Takano, Naoki Watanabe, Akira Kouchi
Pages
127-
Published: 2016
Released on J-STAGE: November 09, 2016
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Koga Toshiki, Hiroshi Naraoka
Pages
128-
Published: 2016
Released on J-STAGE: November 09, 2016
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Motoo Ito, Yoko Kebukawa, Akira Ijiri, Minako Hashiguchi, Hiroshi Nara ...
Pages
129-
Published: 2016
Released on J-STAGE: November 09, 2016
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Minako Hashiguchi, Hiroshi Naraoka
Pages
130-
Published: 2016
Released on J-STAGE: November 09, 2016
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Yoko Kebukawa, Motoo Ito, Michael E. Zolensky, Zia Rahman, A. L. David ...
Pages
131-
Published: 2016
Released on J-STAGE: November 09, 2016
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Yu Kodama, Naotaka Tomioka, Motoo Ito, Naoya Imae
Pages
132-
Published: 2016
Released on J-STAGE: November 09, 2016
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Masashi Shidare, Ryoichi Nakada, Tomohiro Usui, Kenji Shimizu, Yoshio ...
Pages
133-
Published: 2016
Released on J-STAGE: November 09, 2016
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Chiaki Uyeda, Satoshi Ogino, Keiji Hisayoshi
Pages
134-
Published: 2016
Released on J-STAGE: November 09, 2016
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Hisayoshi Yurimoto
Pages
135-
Published: 2016
Released on J-STAGE: November 09, 2016
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The Astromaterials Science Research group of JAXA has been organized in 2015 as successor to the extraterrestrial curation facility. New mission of the group is research oriented in addition to routine operational services to scientific communities. As a result, it is necessary to enhance strong interactive relationship with material scientists of industry-government-academia research communities in the world. In this presentation, I introduce present status of the group with the history and we would like to discuss strategy for the enhancement towards new generation sample return missions of Hayabusa2, OSIRIS-Rex, and MMX.
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Yoshitaka Homma, Tsuyoshi Iizuka
Pages
136-
Published: 2016
Released on J-STAGE: November 09, 2016
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Katsuyuki Yamashita, Syougo Gouda, Shigekazu Yoneda, Keisuke Nagao
Pages
137-
Published: 2016
Released on J-STAGE: November 09, 2016
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Tsuyoshi Iizuka, Akira Yamaguchi, Piers Koefoed, Yuki Hibiya, Yuri Ame ...
Pages
138-
Published: 2016
Released on J-STAGE: November 09, 2016
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Hiroshi Hidaka, Kohei Sera, Shigekazu Yoneda
Pages
139-
Published: 2016
Released on J-STAGE: November 09, 2016
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Sr isotopic study was performed on eight basaltic eucrites including five desert eucrites for better understanding of their evolution process through the Rb-Sr systematic. However, the Rb-Sr decay system of five desert eucrites has been largely disturbed possibly by terrestrial contamination, while that of three non-dessert eucrites is consistent with 4.39-Ga old isochron obtained from previous study. As a result of mineralogical observation from the thin section of one of the desert eucrites, the deposits of hydrous minerals such as Ca-carbonates and Fe-hydroxides were found in the texture. Subsequently acid-leaching treatment of the individual samples was performed to remove the terrestrial contamination, but it was not enough to construct the Rb-Sr isochron corresponding to the primitive materials in the solar system.
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Keiji Misawa, Tatsunori Yokoyama, Shigekazu Yoneda
Pages
140-
Published: 2016
Released on J-STAGE: November 09, 2016
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Minoru Ozima
Pages
141-
Published: 2016
Released on J-STAGE: November 09, 2016
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We discuss the scientific significance of "Martian meteorites", which has so far been widely accepted among meteoritics community.
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Linjie Zheng, Tomoharu Minami, Shotaro Takano, Yoshiki Sohrin
Pages
142-
Published: 2016
Released on J-STAGE: November 09, 2016
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Masachika Nakagawa, Kai Maruyama, Kazuhiro Norisuye, Hajime Obata, Tos ...
Pages
143-
Published: 2016
Released on J-STAGE: November 09, 2016
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Makoto Tsujisaka, Shotoro Takano, Takahumi Hirata, Ki―Cheol Shin, Yosh ...
Pages
144-
Published: 2016
Released on J-STAGE: November 09, 2016
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Kai Maruyama, Masachika Nakagawa, Kazuhiro Norisuye, Hajime Obata, Tos ...
Pages
145-
Published: 2016
Released on J-STAGE: November 09, 2016
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Kazuhiro Norisuye, Kenta Takahashi, Show Hasegawa, Shotaro Takano, Yos ...
Pages
146-
Published: 2016
Released on J-STAGE: November 09, 2016
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Hirotaka Nishino, Tasuku Akagi
Pages
147-
Published: 2016
Released on J-STAGE: November 09, 2016
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Tasuku Akagi, Mariko Emoto, Takushi Yokoyama
Pages
148-
Published: 2016
Released on J-STAGE: November 09, 2016
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Speciation of Al in sediment-trap samples collected from the Bering Sea was made using 27Al-MAS NMR. Chemical leaching disclosed that more than 80% of Al was siliceous. The spectra of sediment-trap samples resembled that of the cultivated diatoms with Al ions being doped. This study implies the presence of biogenic Al in diatom frustules. Geochemical implication of the presence will be discussed.
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Hideki Minami, Takahiro Sasao, Kohei Sakata, Yuzuru Nakaguchi, Hajime ...
Pages
149-
Published: 2016
Released on J-STAGE: November 09, 2016
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Yoshiro Nishio
Pages
150-
Published: 2016
Released on J-STAGE: November 09, 2016
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