Kochi Institute, JAMSTEC
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High precision SIMS oxygen isotope analysis and the effect of sample topography
NT Kita, T Ushikubo, B Fu, JW Valley
Chemical Geology 264 (1-4), 43-57, 2009
Hadean age for a post-magma-ocean zircon confirmed by atom-probe tomography
JW Valley, AJ Cavosie, T Ushikubo, DA Reinhard, DF Lawrence, ...
Nature Geoscience 7 (3), 219-223, 2014
Chondrulelike objects in short-period comet 81P/Wild 2
T Nakamura, T Noguchi, A Tsuchiyama, T Ushikubo, NT Kita, JW Valley, ...
Science 321 (5896), 1664-1667, 2008
Primordial oxygen isotope reservoirs of the solar nebula recorded in chondrules in Acfer 094 carbonaceous chondrite
T Ushikubo, M Kimura, NT Kita, JW Valley
Geochimica et Cosmochimica Acta 90, 242-264, 2012
Lithium in Jack Hills zircons: Evidence for extensive weathering of Earth's earliest crust
T Ushikubo, NT Kita, AJ Cavosie, SA Wilde, RL Rudnick, JW Valley
Earth and Planetary Science Letters 272 (3-4), 666-676, 2008
26Al‐26Mg isotope systematics of the first solids in the early solar system
NT Kita, QZ Yin, GJ MacPherson, T Ushikubo, B Jacobsen, K Nagashima, ...
Meteoritics & Planetary Science 48 (8), 1383-1400, 2013
Intratest oxygen isotope variability in the planktonic foraminifer N. pachyderma: Real vs. apparent vital effects by ion microprobe
R Kozdon, T Ushikubo, NT Kita, M Spicuzza, JW Valley
Chemical Geology 258 (3-4), 327-337, 2009
Evolution of protoplanetary disk inferred from 26Al chronology of individual chondrules
NT Kita, T Ushikubo
Meteoritics & Planetary Science 47 (7), 1108-1119, 2012
Oxygen isotope ratios of FeO-poor chondrules in CR3 chondrites: Influence of dust enrichment and H2O during chondrule formation
TJ Tenner, D Nakashima, T Ushikubo, NT Kita, MK Weisberg
Geochimica et Cosmochimica Acta 148, 228-250, 2015
High-precision oxygen isotope analysis of picogram samples reveals 2 μm gradients and slow diffusion in zircon
FZ Page, T Ushikubo, NT Kita, LR Riciputi, JW Valley
American Mineralogist 92 (10), 1772-1775, 2007
Perspectives on the origin of plagiogranite in ophiolites from oxygen isotopes in zircon
CB Grimes, T Ushikubo, R Kozdon, JW Valley
Lithos 179, 48-66, 2013
Uniformly mantle-like δ18O in zircons from oceanic plagiogranites and gabbros
CB Grimes, T Ushikubo, BE John, JW Valley
Contributions to Mineralogy and Petrology 161, 13-33, 2011
Presidential address. Nano-and micro-geochronology in Hadean and Archean zircons by atom-probe tomography and SIMS: New tools for old minerals
JW Valley, DA Reinhard, AJ Cavosie, T Ushikubo, DF Lawrence, ...
American Mineralogist 100 (7), 1355-1377, 2015
Well-resolved variations in the formation ages for Ca–Al-rich inclusions in the early Solar System
GJ MacPherson, NT Kita, T Ushikubo, ES Bullock, AM Davis
Earth and Planetary Science Letters 331, 43-54, 2012
Seasonal resolution of Eastern Mediterranean climate change since 34 ka from a Soreq Cave speleothem
IJ Orland, M Bar-Matthews, A Ayalon, A Matthews, R Kozdon, T Ushikubo, ...
Geochimica et Cosmochimica Acta 89, 240-255, 2012
Li isotopes and trace elements as a petrogenetic tracer in zircon: insights from Archean TTGs and sanukitoids
AS Bouvier, T Ushikubo, NT Kita, AJ Cavosie, R Kozdon, JW Valley
Contributions to Mineralogy and Petrology 163, 745-768, 2012
Oxygen isotope systematics of chondrule phenocrysts from the CO3. 0 chondrite Yamato 81020: Evidence for two distinct oxygen isotope reservoirs
TJ Tenner, T Ushikubo, E Kurahashi, NT Kita, H Nagahara
Geochimica et Cosmochimica Acta 102, 226-245, 2013
SIMS analyses of silicon and oxygen isotope ratios for quartz from Archean and Paleoproterozoic banded iron formations
PR Heck, JM Huberty, NT Kita, T Ushikubo, R Kozdon, JW Valley
Geochimica et Cosmochimica Acta 75 (20), 5879-5891, 2011
Constraining atmospheric oxygen and seawater sulfate concentrations during Paleoproterozoic glaciation: In situ sulfur three-isotope microanalysis of pyrite from the Turee …
KH Williford, MJ Van Kranendonk, T Ushikubo, R Kozdon, JW Valley
Geochimica et Cosmochimica Acta 75 (19), 5686-5705, 2011
Oxygen isotope systematics of chondrules in the Allende CV3 chondrite: High precision ion microprobe studies
NG Rudraswami, T Ushikubo, D Nakashima, NT Kita
Geochimica et Cosmochimica Acta 75 (23), 7596-7611, 2011
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