2022年度 後期セミナー

date name subject
10/11 Tetsuya YOKOYAMA Chromium and titanium isotope systematics of Ryugu samples
10/14 Ikshu GAUTAM Mo isotopic analyses of iron meteorites
10/18 Makiko K. HABA Formation age of the Rheasilvia crater constrained from meteorite chronology 
10/21 Nao NAKANISHI Dissipation of Tungsten-182 Anomalies in the Archean Upper Mantle: Evidence from the Black Hills, South Dakota, USA
10/25 Tatsuya TAMURA Re-evaluation of Mo-Double spike calculation method
11/4 Yuki MASUDA Nucleosynthetic titanium isotope anomalies in fine-grained CAIs from Allende meteorite
11/11 Keiji NISHIKAWA Estimation of the Formation Process of Mars by Chromium Isotope Analysis of Martian Meteorites
11/18 Yusuke OHKUMA Determination of Cr and Ti isotopic compositions in chondrites with an alkali fusion digestion method
11/22 Yoshiaki SHIRAISHI Chromium isotopic compositions in Al-rich chondrules from two CV chondrites, Allende and Leoville
11/25 Kaoru KITAMURA Achondrite-ung 隕石の高精度 Mo 同位体分析
11/29 Shumpei MASAKI Mo isotopic anomaly in Mesosiderite and Eucrite
12/2 Ryu SATO (Ishikawa Lab) コマチアイト質マグマから探るマントル化学進化
12/6 Hidetoshi MORI (Ishikawa Lab) 北海道岩内岳高枯渇度かんらん岩の主要元素分析
12/9 Takumi SATO (Ishikawa Lab) Elemental mobilization of Oman ophiolite serpentinite
12/16 Takahiro HAZAMA (Ishikawa Lab) キャロラインホットスポット産マントル捕獲岩の温度圧力推定
1/10 Yuta IHARA (Ishikawa-lab) PGE geochemistry of Phanerozoic komatiites and picrites from Gorgona Island, Caribbean-Columbian Oceanic Plateau: implications for multistage melting from heterogeneous source
1/13 Ryo FUJITA (Ishikawa-lab) Reconstruction of the lithospheric stratigraphy beneath the Hawaiian Islands: Constraint from the peridotite xenoliths, Kaua’i and Ka’ula Islands, Hawaii
1/17 Koharu FUJIMURA Verification of the method to determine the Nb/Zr ratio of meteoritic rutiles using TQ ICP-MS and improvement of Zr ion-exchange chromatography
1/20 Yuka NIWA (Ishikawa-lab) Thermal structure of oceanic lithosphere inferred from the petit-spot mantle xenoliths
1/24 Akira ISHIKAWA (Ishikawa-lab) Simple and accurate determination of chalcophile and highly siderophile elements in carbonaceous chondrites using triple quadrupole ICP-MS.
1/27 Yao XIAO Using the Cr isotope system to indicate the magmatic evolution inside Vesta

2022年度 前期セミナー

date name subject
4/12 Tetsuya YOKOYAMA Suppression of the secondary mass fractionation in high-precision Cr isotope analysis with TIMS
4/15 Akira ISHIKAWA Highly siderophile element constraints on Earth?s mantle evolution
4/19 Makiko K. HABA The cooling history of the parent body of mesosiderites after the giant impact 
4/22 Yuki MASUDA Clarification of formation processes of fine-grained CAIs in Allende meteorite using rare-element distribution analysis 
4/26 Tatsuya TAMURA Molybdenum isotopic composition of arc volcanos and its implication to the evolution of the Earth
5/6 Takahiro OZAWA (Ishikawa lab) Hydrogen isotope of the mantle source in Pitcairn Island
5/10 Ryo FUJITA (Ishikawa-lab) Helium isotopes in Hawaiian mantle xenoliths
6/7 Yuta IHARA (Ishikawa-lab) Mantle sources of Phanerozoic komatiite from Gorgona Island, Colombia: Implication from osmium isotope heterogeneity
6/10 Koharu FUJIMURA The three stage ion exchange procedure for Zr isotope analysis by MC-ICP-MS
6/17 Keiji NISHIKAWA Tracking the volatile and magmatic history of Mars from chromium stable isotope variations in Shergottite
6/21 Yuka NIWA (Ishikawa-lab) Thermal structure of oceanic lithosphere constrained from the petit-spot mantle xenoliths
6/24 Takumi SATO (Ishikawa Lab) Understanding serpentinization and weathering processes approached by the variation of whole rock composition
6/28 Hidetoshi MORI Paper reading: Pearson et al. (2021) Deep continental roots and cratons
6/28 Kaoru KITAMURA Paper reading: Hibiya et al. (2019) The origin of the unique achondrite Northwest Africa 6704: Constraints from petrology, chemistry and Re?Os, O and Ti isotope systematics
7/5 Takahiro HAZAMA Paper reading: Archean cratonic mantle recycled at a mid ocean ridge
7/5 Yoshiaki SHIRAISHI Paper reading: [1] Schneider et al. (2020) Early evolution of the solar accretion disk inferred from Cr Ti O isotopes in individual chondrules [2] Williams et al. (2020) Chondrules reveal large scale outward transport of inner Solar System materials in the protoplanetary disk
7/8 Shumpei MASAKI Paper reading: Spitzer et al. (2020) Isotopic evolution of the inner Solar System inferred from molybdenum isotopes in meteorites
7/8 Takashi SATO Paper reading: Puchtel et al. (2022) Early global mantle chemical and isotope heterogeneity revealed by the komatiite-basalt record: The Western Australia connection
9/30 Yusuke OHKUMA Development of an alkaline fusion method for the digestion of carbonaceous chondrites