51. Endo Y, Danielache S, Ueno Y, Hattori S, Johnson MS, Yoshida N, Kjaergaard HG., 2015, Photoabsorption cross-section measurements of ³²S, ³³S, ³⁴S and ³⁶S sulfur dioxide from 190 to 220 nm: Journal of Geophysical Research, Atmosphere, Volume 120, Issue 6, p. 2546–2557.

50. Ueno Y, Danielache S, Yoshida N., 2015, Decoding Redox Evolution Before Oxygenic Photosynthesis Based on the Sulfur-Mass Independent Fractionation (S-MIF) Record: Origins of Life and Evolution of the Biosphere, Volume 45, Issue 3, p. 371-374.

49. Tahata, M., Sawaki, Y., Ueno, Y., Nishizawa, M., Yoshida, N., Ebisuzaki, T., Komiya, T., and Maruyama, S., 2015, Three-step modernization of the ocean: Modeling of carbon cycles and the revolution of ecological systems in the Ediacaran/Cambrian periods: Geoscience Frontiers, v.6 (1) , p. 121-136.

48. Ueno, Y., Danielache, S., and Yoshida, N., 2015, Decoding redox evolution before oxygenic photosynthesis based on the Sulfur-Mass Independent Fractioantion (S-MIF) record: Origins of Life and Evolution of the Biosphere, v.45 , p. 371-374.

47. Endo, Y., Danielache, SO., Ueno, Y., Hattori, S., Johnson, MS., Yoshida, N., Kjaergaard, HG., 2015, Photoabsorption cross-section measurements of 32S, 33S, 34S and 36S sulfur dioxide from 190 to 220 nm: Journal of Geophysical Research: Atmospheres, v.120 , p. 2546-2557, doi:10.1002/2014JD021671.

46. Shimizu, K., Suzuki, K., Saitoh, M., Konno, U., Kawagucci, S., Ueno, Y., 2015, Simultaneous determinations of fluorine, chlorine, and sulfur in rock samples by ion chromatography combined with pyrohydrolysis: Geochemical Journal, v.49 (1) , p. 113-124.

45. Hattori, S., Toyoda, A., Toyoda, S., Ishino, S., Ueno, Y., Yoshida, N., 2014, Determination of the Sulfur Isotope Ratio in Carbonyl Sulfide Using Gas Chromatography/Isotope Ratio Mass Spectrometry on Fragment Ions 32S+, 33S+, and 34S+: Analytical chemistry, v.87 (1) , p. 477-484.

44. Yuichiro Ueno, 2014, Coping with low ocean sulfate, Science Vol. 346 no. 6210 pp. 703-704.

43. Saitoh, M., Ueno, Y., Isozaki, Y., Nishizawa, M., Shozugawa, K., Kawamura, T., Yao, J., Ji, Z., Takai, K., Yoshida, N., and Matsuo, M., 2014, Isotopic evidence for water-column denitrification and sulfate reduction at the end-Guadalupian (Middle Permian): Global and Planetary Change, v.123 , p. 110-120.

42. Yamada, K., Ueno, Y., Yamada, K., Komiya, T., Han, J., Shu, D., Yoshida, N., and Maruyama, S., 2014, Molecular fossils extracted from the Early Cambrian section in the Three Gorges area, South China: Gondwana Research, v. 25, p. 1108-1119.

41. Suda, K., Ueno, Y., Yoshiazaki, M., Nakamura, H., Kurokawa, K., Nishiyama, E., Yoshino, K., Hongoh, Y., Kawachi, K., Omori, S., Yamada, K., Yoshida, N., and Maruyama, S., 2014, Reply to comment on “Origin of methane in serpentinite-hosted hydrothermal systems: The CH4–H2–H2O hydrogen isotope systematics of the Hakuba Happo hot spring” by Suda et al. [Earth Planet. Sci. Lett. 386 (2014) 112–125]: Earth and Planetary Science Letters, v. 401, p. 376-377.

40. Suda, K., Ueno, Y., Yoshiazaki, M., Nakamura, H., Kurokawa, K., Nishiyama, E., Yoshino, K., Hongoh, Y., Kawachi, K., Omori, S., Yamada, K., Yoshida, N., and Maruyama, S., 2014, Origin of methane in serpentinite-hosted hydrothermal systems: The CH4–H2–H2O hydrogen isotope systematics of the Hakuba Happo hot spring: Earth and Planetary Science Letters, v. 386, p. 112-125.

39. Saitoh, M., Ueno, Y., Nishizawa, M., Isozaki, Y., Takai, K., Yao, J., and Ji, Z., 2014, Nitrogen isotope chemostratigraphy across the Permian-Triassic boundary at Chaotian, Sichuan, South China: Journal of Asian Earth Sciences, v. 93, p. 113-128.

38. Nomura, R., Hirose, K., Uesugi, K., Ohishi, Y., Tsuchiyama, A., Miyake, A., and Ueno, Y., 2014, Low core-mantle boundary temperature inferred from the solidus of pyrolite: Science, v. 343, p. 522-525.

37. Kikumoto, R., Tahata, M., Nishizawa, M., Sawaki, Y., Maruyama, S., Shu, D., Han, J., Komiya, T., Takai, K., and Ueno, Y., 2014, Nitrogen isotope chemostratigraphy of the Ediacaran to Early Cambrian platform sequence in the Three Gorges, South China: Gondwana Research, v. 25, p. 1057-1069.

36. Kawagucci, S., Kobayashi, M., Hattori, S., Yamada, K., Ueno, Y., Takai, K., and Yoshida, N., 2014, Hydrogen isotope systematics among H2-H2O-CH4 during the growth of the hydrogenotrophic methanogen Methanothermobacter thermoautotrophicus strain ΔH: Geochimica et Cosmochimica Acta, v. 142, p. 601-614.

35. Ishikawa, T., Ueno, Y., Shu, D., Li, Y., Han, J., Guo, J., Yoshida, N., Maruyama, S., and Komiya, T., 2014, The δ13C excursions spanning the Cambrian explosion to the Canglangpuian mass extinction in the Three Gorges area, South China: Gondwana Research, v. 25, p. 1045-1056.

34. Igisu, M., Komiya, T., Kawashima, M., Nakashima, S., Ueno, Y., Han, J., Shu, D., Li, Y., Guo, J. F., Maruyama, S., and Takai, K., 2014, FTIR microspectroscopy of Ediacaran phosphatized microfossils from the Doushantuo Formation, Weng’an, South China: Gondwana Research, v. 25, p. 1120-1138.

33. Aoyama, S., Nishizawa, M., Takai, K., and Ueno, Y., 2014, Microbial sulfate reduction within the Iheya North subseafloor hydrothermal system constrained by quadruple sulfur isotopes: Earth and Planetary Science Letters, v. 398, p. 113-126.

32. Tahata, M., Ueno, Y., Ishikawa, T., Sawaki, Y., Murakami, K., Han, J., Shu, D. G., Li, Y., Guo, J. F., Yoshida, N., and Komiya, T., 2013, Carbon and oxygen isotope chemostratigraphies of the Yangtze platform, South China: Decoding temperature and environmental changes through the Ediacaran: Gondwana Research, v. 23, no. 1, p. 333-353.

31. Shibuya, T., Tahata, M., Ueno, Y., Komiya, T., Takai, K., Yoshida, N., Maruyama, S., and Russell, M. J., 2013, Decrease of seawater CO2 concentration in the Late Archean: An implication from 2.6 Ga seafloor hydrothermal alteration: Precambrian Research, v. 236, p. 59-64.

30. Saitoh, M., Isozaki, Y., Yao, J., Ji, Z., Ueno, Y., and Yoshida, N., 2013, The appearance of an oxygen-depleted condition on the Capitanian disphotic slope/basin in South China: Middle-Upper Permian stratigraphy at Chaotian in northern Sichuan: Global and Planetary Change, v. 105, p. 180-192.

29. Saitoh, M., Isozaki, Y., Ueno, Y., Yoshida, N., Yao, J., and Ji, Z., 2013, Middle-Upper Permian carbon isotope stratigraphy at Chaotian, South China: Pre-extinction multiple upwelling of oxygen-depleted water onto continental shelf: Journal of Asian Earth Sciences, v. 67-68, p. 51-62.

28. Rumble III, D., Bowring, S., Iizuka, T., Komiya, T., Lepland, A., Rosing, M. T., and Ueno, Y., 2013, The oxygen isotope composition of Earth's oldest rocks and evidence of a terrestrial magma ocean: Geochemistry Geophysics Geosystems, v. 14, p. 1929-1939.

27. Kawagucci, S., Ueno, Y., Takai, K., Toki, T., Ito, M., Inoue, K., Makabe, A., Yoshida, N., Muramatsu, Y., Takahata, N., Sano, Y., Narita, T., Teranishi, G., Obata, H., Nakagawa, S., Nunoura, T., and Gamo, T., 2013, Geochemical origin of hydrothermal fluid methane in sediment-associated fields and its relevance to the geographical distribution of whole hydrothermal circulation: Chemical Geology, v. 339, p. 213-225.

26. Ishikawa, T., Ueno, Y., Shu, D. G., Li, Y., Han, J., Guo, J. F., Yoshida, N., and Komiya, T., 2013, Irreversible change of the oceanic carbon cycle in the earliest Cambrian: High-resolution organic and inorganic carbon chemostratigraphy in the Three Gorges area, South China: Precambrian Research, v. 225, p. 190-208.

25. Hokada, T., Horie, K., Satish-Kumar, M., Ueno, Y., Nasheeth, A., Mishima, K., and Shiraishi, K., 2013, An appraisal of Archaean supracrustal sequences in Chitradurga Schist Belt, Western Dharwar Craton, Southern India: Precambrian Research, v. 227, p. 99-119.

24. Hattori, S., Schmidt, J. A., Johnson, M. S., Danielache, S. O., Yamada, A., Ueno, Y., and Yoshida, N., 2013, SO2 photoexcitation mechanism links mass-independent sulfur isotopic fractionation in cryospheric sulfate to climate impacting volcanism.: Proceedings of the National Academy of Sciences of the United States of America, v. 110, p. 17656-17661.

23. Nishizawa M., Yamamoto H., Ueno Y., Tsuruoka S., Shibuya T., Sawaki Y., Yamamoto S., Kon Y., Kitajima K., Komiya T., Maruyama S., Hirata T. (2010). Grain-scale iron isotopic distribution of pyrite from Precambrian shallow marine carbonate revealed by a femtosecond laser ablation multicollector ICP-MS technique: Possible proxy for the redox state of ancient seawater. Geochimica Cosmochimica Acta 74, 2760-2778.

22. Ueno Y., Johnson M.S., Danielache S.O., Eskebjerg C., Pandey A. and Yoshida N.(2009) Geological sulfur isotopes indicate elavated OCS in the Archean atmosphere, solving faint young Sun paradox Proceedings of the Nathional Academy of Science USA 106, 14784-14789.

21. Igisu M., Ueno Y., Shimojima, M., Nakashima S., Awramik S.M., Ohta H., and Maruyama S. (2009) Micro-FTIR spectroscopic signatures of Bacterial lipids in Proterozoic microfossils. Precambrian Research 173, 19-26.

20. Ueno Y., Ono S., Rumble D. and Maruyama S.(2008) Quadruple sulfur isotope analysis of ca. 3.5 Ga Dresser Formation: new evidence for microbial sulfate reduction in the Early Archean Geochimica et Cosmochimica Acta 72, 5675-5691.

19. Danielache S.O., Eskebjerg C., Johnson M.S.,Ueno Y., and Yoshida N.(2008) High-precision spectroscopy of 32S, 33S and 34S sulfur dioxide: ultraviolet absorption cross sections and isotope effects Journal of Geophysical Research 113, doi:10.1029/2007JD009695

18. Takai K., Nunoura T., Ishibashi J., Lupton J., Suzuki R., Hamasaki H.,Ueno Y., Kawagucci S., Gamo T., Suzuki Y., Hirayama H., and Horikoshi K.(2008) Variability in the microbial communities and hydrothermal fluid chemistry at the newly-discovered Mariner hydrothermal field, southern Lau Basin. Journal of Geophysical Research 113, G02031, doi:10.1029/2007JG000636

17. Ohno T., Komiya T., Ueno Y., Hirata T., and Maruyama S. (2008) Determination of 88Sr/86Sr mass-dependent isotopic fractionation and radiogenic isotope variation of 87Sr/86Sr in the Neoproterozoic Doushantuo Formation. Gondwana Research 14, 126-133.

16. Ishikawa T., Ueno Y., Komiya T., Sawaki Y., Han J., Shu D., Li Y., Maruyama S., and Yoshida N. (2008) Carbon isotope chemostratigraphy of a Pc/C boundary section in the Three Gorge area, South China: Global scale prominent isotope excursions just before the Cambrian Explosion. Gondwana Research 14, 193-208.

15. Ueno Y. (2007) Stable carbon and sulfur isotope geochemistry of the c. 3490 Ma Dresser Formation hydrothermal deposit, Pilbara Craton, Western Australia. In Earth's Oldest Rocks (Developments in Precambrian Geology) (eds. Van Kranendonk, M.J., Smithies, R.H., and Bennett, V.) Elsevier, 879-896.

14. Nishizawa M., Sano Y., Ueno Y. , and Maruyama S. (2007) Speciation and isotope ratio of nitrogen in fluid inclusions from seafloor hydrothermal deposits at 3.5 Ga: Implication for N cycle on the early Earth. Earth and Planetary Sciences Letters 254, 332-344.

13. Iizuka T., Komiya T., Ueno Y., Katayama I., Uehara Y., Maruyama S., and Hirata T. (2007) Tectonothermal history of the Acasta Gneiss Complex, northwestern Canada: Constraints from geology and zircon U-Pb dating combined with cathodoluminescence imagery. Precambrian Research 153, 179-208.

12. Ueno Y., Yamada K., Yoshida N., Maruyama S., and Isozaki Y. (2006) Biosignatures and abiotic constraints on Early life (Reply). Nature 444, E19-E19 (doi:10.1038/nature05500).

11. Igisu M., Nakashima S., Ueno Y., Awramik S.M., and Maruyama S. (2006) In-situ IR microspectroscopy of ~850 million-year-old prokaryotic fossils. Applied Spectroscopy 60, 1111-1120.

10. Ueno Y., Yamada K., Yoshida N., Maruyama S., and Isozaki Y. (2006) Evidence from fluid inclusions for microbial methanogenesis in the early Archaean era. Nature 440, 516-519.

9. Ueno Y., Isozaki Y., and McNamara K.J. (2006) Coccoid-like microstructures in a 3.0 Ga chert from Western Australia. International Geology Review 48, 78-88.

8. Sakurai R., Ito, M., Ueno Y., Kitajima K., and Maruyama S. (2005) Facies architecture and sequence-stratigraphic features of the Tumbiana Formation in the Pilbara Craton, northwestern Australia: Implications for depositional environments of oxygenic stromatolites during the Late Archean. Precambrian Research 138, 255-273.

7. Nishizawa M., Takahata N., Terada K., Komiya T., Ueno Y., and Sano Y. (2005) Lead, carbon and nitrogen isotope geochemistry of apatite-bearing metasediments from ~3.8 Ga Isua supracrustal belt, West Greenland: primary signature and secondary disturbance. International Geology Review 47, 952-970.

6. Nishizawa M., Terada K., Ueno Y., and Sano Y. (2004) Ion microprobe U-Pb dating and REE analysis of apatite from kerogen-rich silica dike from North Pole area, Pilbara Craton, Western Australia. Geochemical Journal 38, 243-254.

5. Ueno Y., Yoshioka H., Maruyama S., and Isozaki Y. (2004) Carbon isotopes and petrography of kerogens in ca. 3.5 Ga hydrothermal silica dikes in the North Pole area, Western Australia. Geochimica et Cosmochimica Acta 68, 573-589.

4. Ueno Y. (2003) Biosphere in the 3.5 Ga sub-seafloor hydrothermal system. Journal of Geography (in Japanese with English abstract) 112, 208-217.

3. Ueno Y., Yurimoto H., Yoshioka H., Komiya T., and Maruyama S. (2002) Ion microprobe analysis of graphite from ca. 3.8 Ga metasediments, Isua supracrustal belt, West Greenland: Relationship between metamorphism and carbon isotopic composition. Geochimica et Cosmochimica Acta 66, 1257-1268.

2. Ueno Y., Isozaki Y., Yurimoto H., and Maruyama S. (2001) Mode of occurrence of Early Archean microfossils and 13C-depleted organic matter from North Pole area, Western Australia. In Geochemistry and the Origin of Life (eds. Nakashima S., Maruyama S., Brack A., and Windley B.) pp. 203-236. Universal Academy Press, Tokyo.

1. Ueno Y., Isozaki Y., Yurimoto H., and Maruyama S. (2001) Carbon isotopic signatures of individual Archean microfossils (?) from Western Australia. International Geology Review 43, 196-212.

My research interests center on the early evolution of Earth’s biosphere and its interaction with surface environment, especially older than 2.5 billion years (Archean). For the better understanding of biogeochemistry of the early Earth, I have tried to integrate several independent approaches including stable isotope geochemistry, micro-paleontology, and field geology.