Origin and evolution of Earth

We investigate various types of terrestrial rocks ranging from Archean to modern times. Of particular interests are (1) 238U-230Th radioactive disequilibrium in modern volcanic rocks to elucidate the magma process beneath active volcanoes, (2) geochemical investigation of volcanic rocks and mantle xenoliths from the Cameroonian volcanic line, and (3) isotopic analyses of komatiites to understand the origin and chemical evolution of the Earth's mantle.

Related papers

Nakamura, H., Sano, A., Kagami, S., Yokoyama, T., Ishikawa, A., Komiya, T., Iwamori, H.

Compositional heterogeneity of Archean mantle estimated from Sr and Nd isotopic systematics of basaltic rocks from North Pole, Australia, and the Isua Supracrustal Belt, Greenland.
Precambrian Research, in press.

Taniuchi, H., Kuritani, T., Yokoyama, T., Nakamura, E., Nakagawa, M.

A new concept for the genesis of felsic magma: the separation of slab-derived supercritical liquid.
Scientific Reports 10, 1-9, 2020.

Kuritani, T., Nakagawa, M., Nishimoto, J., Yokoyama, T., Miyamoto, T.

Magma plumbing system for Millennium Eruption at Changbaishan volcano, China: Constraints from whole-rock U-Th disequilibrium.
Lithos 366-367, 105564, 2020.

Asaah, A.N.E., Yokoyama, T., Aka, F.T., Kuritani,T., Iwamori, H., Usui, T., Gountie, M.D., Tamen, J., Hassegawa, T., Fozing, T.E.M., Nche, A.L.

Major/trace elements and Sr-Nd-Pb isotope systematics of lavas from Lakes Barombi Mbo and Barombi Koto in the Kumba graben, Cameroon Volcanic Line: Constraints on petrogenesis.
Journal of African Earth Science, 2020. 161, 103675 (14 pp).