Previous works

Research at University of Tokyo

I graduated from Mineralogical Institute, the University of Tokyo. The institute already disappeared and was integrated to the Department of Earth and Planetary Sciences. My thesis supervisor was Professor Murakami who is in charge of environmental mineralogy seminar. Some of group members have been to to Canada in 1999 to collect samples of "paleosol", which is a weathered rocks developed on the Archean basement rocks.

T. Murakami, J. Ito, S. Utsunomiya, and T. Kasama, Biotite dissolution processes under an anoxic condition: Implication for Fe behavior during Archean weathering. Earth and Planetary Science Letters, 224 (2004) 117-129.
S. Utsunomiya, T. Murakami, M. Nakada, and T. Kasama, Iron oxidation state of a 2.45 b.y.-old paleosol developed on mafic volcanics, Geochimica et Cosmochimica Acta, 67 (2003) 213-221. - This paper has been chosen for inclusion in electric-only virtual Journal of Geobiology, vol.2 issue 2.
T. Murakami, S. Utsunomiya, T. Yokoyama, and T. Kasama, Biotite dissolution process and mechanism in laboratory and field: Early stage weathering environment and vermiculitization, American Mineralogist, 88 (2003) 377-386.
K. Kitajima, S. Utsunomiya, and S. Maruyama, Physico-chemical environment of an Archean Mid-Ocean Ridge: estimate of seawater depth and hydrothermal fluid composition. In: Geochemistry and the Origin of Life (eds S. Nakashima, S. Maruyama, A. Brack and B. F. Windley) (2001), 179-202, Universal Academy Press Inc., Tokyo, Japan
K. Kitajima, S. Maruyama, S. Utsunomiya, and J. G. Liou, Seafloor hydrothermal alteration at an Archean mid-ocean ridge, Journal of Metamorphic Geology, 19 (2001) 581-597.
T. Murakami, S. Utsunomiya, Y. Imazu, and N. Prasad, Direct evidence of Late Archean to Early Proterozoic anoxic atmosphere from a product of 2.5 Ga old weathering Earth and Planetary Science Letters, 184 (2001) 523-528. - This paper was highlighted in Editor's Choice column of Science 291
S. Utsunomiya, T. Murakami, K. Tsukimura, and H. Kadohara, The effect of partial pressure of carbon dioxide on anorthite dissolution. Mineralogical Journal 21, (1999)1-8.
T. Murakami and S. Utsunomiya, Comparison of biotite dissolution in the laboratory and in the field by high-resolution transmission electron microscopy, Mineralogical Magazine 62A (1998) 1044-1045.