Search Results - "Wakaki, Shigeyuki"

Isotope analysis of nanogram to sub-nanogram sized Nd samples by total evaporation normalization thermal ionization mass spectrometry by Wakaki, Shigeyuki, Ishikawa, Tsuyoshi

“…[Display omitted] •143Nd/144Nd of sub-ng sized Nd was analyzed by total evaporation normalization TIMS.•TEN-TIMS brings out nearly best performance of…”
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Isotope Dilution–Total Evaporation–Thermal Ionization Mass Spectrometric Direct Determination of Radioactive Strontium-90 in Microdrop Samples by Ito, Chihiro, Shimode, Ryoya, Miyazaki, Takashi, Wakaki, Shigeyuki, Suzuki, Katsuhiko, Takagai, Yoshitaka

“…Thermal ionization mass spectrometry (TIMS) was used to directly quantify an ultratrace of radioactive 90Sr in microliter droplet samples. No chemical…”
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Stable isotope analysis of Nd by double spike thermal ionization mass spectrometry by Wakaki, Shigeyuki, Tanaka, Tsuyoshi

“…[Display omitted] ► High-precision Nd stable isotopic analysis is developed using the refined DS-TIMS technique. ► Typical precision of the analysis is…”
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Significant contribution of subseafloor microparticles to the global manganese budget by Uramoto, Go-Ichiro, Morono, Yuki, Tomioka, Naotaka, Wakaki, Shigeyuki, Nakada, Ryoichi, Wagai, Rota, Uesugi, Kentaro, Takeuchi, Akihisa, Hoshino, Masato, Suzuki, Yoshio, Shiraishi, Fumito, Mitsunobu, Satoshi, Suga, Hiroki, Takeichi, Yasuo, Takahashi, Yoshio, Inagaki, Fumio

“…Ferromanganese minerals are widely distributed in subseafloor sediments and on the seafloor in oceanic abyssal plains. Assessing their input, formation and…”
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Stable Sm isotopic analysis of terrestrial rock samples by double-spike thermal ionization mass spectrometry by Wakaki, Shigeyuki, Tanaka, Tsuyoshi

“…[Display omitted] •Mass-dependent Sm isotopic variation in geological rocks was analyzed by DS-TIMS.•The precision of the stable Sm isotopic analysis by…”
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The magnesium isotopic compositions of the crust and mantle: A study on the Oman ophiolite by Eom, Jiwon, Yoshimura, Toshihiro, Akizawa, Norikatsu, Wakaki, Shigeyuki, Ishikawa, Tsuyoshi, Takazawa, Eiichi, Yamaoka, Kyoko, Kawahata, Hodaka

“…Magnesium isotope compositions (δ26Mg) can provide valuable insights into Mg cycling through surface fluid-rock interactions. Isotopic variations of Mg within…”
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Precise and accurate analysis of deep and surface seawater Sr stable isotopic composition by double-spike thermal ionization mass spectrometry by Wakaki, Shigeyuki, Obata, Hajime, Tazoe, Hirofumi, Ishikawa, Tsuyoshi

“…This paper describes an analytical technique for highly precise and accurate determination of radiogenic and stable Sr isotopic composition using double-spike…”
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Author Correction: A part per trillion isotope ratio analysis of 90Sr/88Sr using energy-filtered thermal ionization mass spectrometry by Wakaki, Shigeyuki, Aoki, Jo, Shimode, Ryoya, Suzuki, Katsuhiko, Miyazaki, Takashi, Roberts, Jenny, Vollstaedt, Hauke, Sasaki, Satoshi, Takagai, Yoshitaka

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A part per trillion isotope ratio analysis of 90Sr/88Sr using energy-filtered thermal ionization mass spectrometry by Wakaki, Shigeyuki, Aoki, Jo, Shimode, Ryoya, Suzuki, Katsuhiko, Miyazaki, Takashi, Roberts, Jenny, Vollstaedt, Hauke, Sasaki, Satoshi, Takagai, Yoshitaka

“…Strontium-90 is a major radioactive nuclide released by nuclear accidents and discharge waste. Input of such radioactive nuclide into earth surface environment…”
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The Origin and Evolution of Nucleosynthetic Sr Isotope Variability in Calcium and Aluminum-rich Refractory Inclusions by Myojo, Kunihiro, Yokoyama, Tetsuya, Okabayashi, Satoki, Wakaki, Shigeyuki, Sugiura, Naoji, Iwamori, Hikaru

“…Nucleosynthetic isotope anomalies in meteorites are useful for investigating the origin of materials in the protoplanetary disk and dynamical processes of…”
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Stable Sr isotope (88Sr/86Sr) fractionation in calcite precious corals by Yoshimura, Toshihiro, Wakaki, Shigeyuki, Iwasaki, Nozomu, Ishikawa, Tsuyoshi, Ohkouchi, Naohiko

“…Stable isotope ratios of Sr ( 88 Sr/ 86 Sr) are a novel indicator for identifying terrestrial and oceanic Sr cycling and biological processes. Here we evaluate…”
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Oxygen Isotopic Compositions of Asteroidal Materials Returned from Itokawa by the Hayabusa Mission by Yurimoto, Hisayoshi, Abe, Ken-ichi, Abe, Masanao, Ebihara, Mitsuru, Fujimura, Akio, Hashiguchi, Minako, Hashizume, Ko, Ireland, Trevor R., Itoh, Shoichi, Katayama, Juri, Kato, Chizu, Kawaguchi, Junichiro, Kawasaki, Noriyuki, Kitajima, Fumio, Kobayashi, Sachio, Meike, Tatsuji, Mukai, Toshifumi, Nagao, Keisuke, Nakamura, Tomoki, Naraoka, Hiroshi, Noguchi, Takaaki, Okazaki, Ryuji, Park, Changkun, Sakamoto, Naoya, Seto, Yusuke, Takei, Masashi, Tsuchiyama, Akira, Uesugi, Masayuki, Wakaki, Shigeyuki, Yada, Toru, Yamamoto, Kosuke, Yoshikawa, Makoto, Zolensky, Michael E.

“…Meteorite studies suggest that each solar system object has a unique oxygen isotopic composition. Chondrites, the most primitive of meteorites, have been…”
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Calcium and strontium stable isotopes reveal similar behaviors of essential Ca and nonessential Sr in stream food webs by Nitzsche, Kai Nils, Wakaki, Shigeyuki, Yamashita, Katsuyuki, Shin, Ki‐Cheol, Kato, Yoshikazu, Kamauchi, Hiromitsu, Tayasu, Ichiro

“…Recent studies showed the potential of stable isotopes of the macronutrient calcium (δ44/40Ca) and nonessential strontium (δ88/86Sr) as new trophic level…”
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Oxygen isotopic composition of the solar nebula gas inferred from high-precision isotope imaging of melilite crystals in an Allende CAI by PARK, Changkun, WAKAKI, Shigeyuki, SAKAMOTO, Naoya, KOBAYASHI, Sachio, YURIMOTO, Hisayoshi

“…– High‐precision isotope imaging analyses of reversely zoned melilite crystals in the gehlenitic mantle of Type A CAI ON01 of the Allende carbonaceous…”
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A chronological and geochemical study of the Tadamigawa older-stage granites: Igneous activity in the west of the Tanakura Tectonic Line (TTL) of northeastern Japan by Wakasugi, Yuki, Wakaki, Shigeyuki, Tanioka, Yudai, Ichino, Koki, Tsuboi, Motohiro, Asahara, Yoshihiro, Noda, Atsushi

“…The Cretaceous to early Paleogene magmatism occurred in the Honshu Arc actively and the formation age for this period shifted regionally in the Southwestern…”
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Lithium isotope systematics of Arima hot spring waters and groundwaters in Kii Peninsula by Umam, Rofiqul, Tanimizu, Masaharu, Nakamura, Hitomi, Nishio, Yoshiro, Nakai, Ryo, Sugimoto, Naoto, Mori, Yasunori, Kobayashi, Yuuki, Ito, Akane, Wakaki, Shigeyuki, Nagaishi, Kazuya, Ishikawa, Tsuyoshi

“…Slab-dehydrated fluid is considered to be involved in island arc magmatism. In this study, Li isotope ratios were determined for deep groundwater samples from…”
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A Systematic Assessment of Stable Sr Isotopic Compositions of Vent Fluids in Arc/Back-Arc Hydrothermal Systems: Effects of Host Rock Type, Phase Separation, and Overlying Sediment by Yoshimura, Toshihiro, Wakaki, Shigeyuki, Ishikawa, Tsuyoshi, Gamo, Toshitaka, Araoka, Daisuke, Ohkouchi, Naohiko, Kawahata, Hodaka

“…Variations in the stable isotopic composition of seawater Sr ( δ 88 Sr) is a new tool for estimating the rates of global carbonate sedimentation over geologic…”
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Characterization of water masses around the southern Ryukyu Islands based on isotopic compositions by Cruz Salmeron, Andros Daniel, Takayanagi, Hideko, Wakaki, Shigeyuki, Ishikawa, Tsuyoshi, Miyajima, Toshihiro, Wakaki, Hitomi, Itaki, Takuya, Iryu, Yasufumi

“…We investigated the water-mass structure on the Okinawa Trough and Pacific sides of the southern Ryukyu Island Arc (Yonaguni, Iriomote, and Ishigaki subareas)…”
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Stable Strontium Isotopic Compositions of River Water, Groundwater and Sediments From the Ganges–Brahmaputra–Meghna River System in Bangladesh by Yoshimura, Toshihiro, Wakaki, Shigeyuki, Kawahata, Hodaka, Hossain, H. M. Zakir, Manaka, Takuya, Suzuki, Atsushi, Ishikawa, Tsuyoshi, Ohkouchi, Naohiko

“…The Sr isotopic composition of rivers and groundwaters in the Bengal Plain is a major contributor to the global oceanic Sr inventory. The stable strontium…”
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Paleogene Lithostratigraphy and Recognition of the Marine Incursion of the Proto-Paratethys Sea in the Fergana Basin, Uzbekistan by Anvarov, Otabek Ulugbek Ogli, Kamata, Yoshihito, Maruoka, Teruyuki, Kuroda, Junichiro, Wakaki, Shigeyuki, Hisada, Ken-ichiro

“…Lithostratigraphy and isotopes of Paleogene sequences consisting mainly of terrestrial clastics and limestone were examined in the northern Fergana Basin of…”
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