Eizo Nakamura

TL;DR: In this article, the authors investigate the subsurface structure of Jeju (Cheju) volcanic island and its vicinity, and propose an alternative hypothesis that the basaltic magma beneath the island could be caused by (episodic) lithospheric folding.

TL;DR: It is demonstrated that peridotites from the Horoman massif preserve the chemical signatures of sub-seafloor hydrothermal alteration at a mid-ocean ridge approximately one billion years ago, indicating that ancient SSH alteration resulting in the production of sulfide leads to Pb enrichment that could affect the present-day Pb isotopic evolution of the silicate earth.

TL;DR: In this article, it was shown that for chondrules in unequilibrated enstatite chondrites, high-precision Δ17O values vary significantly and fall on an array with a steep slope of 127 on a threeoxygen-isotope plot.

TL;DR: In this paper, a strong gravitational field resulted in the gravity-induced diffusion (sedimentation) of isotope atoms in monoatomic solid Se The layer crystalline morphology consisting of three zones of the fine-grained crystals, the long crystals and feather-shaped crystals grown parallel to gravity direction appeared in the specimen ultracentrifuged at (08 1)×106 G and at 190 °C Change in the concentration ratio 82Se/76Se of >08% was observed in the grown crystalline region.

TL;DR: It is inferred that slab-derived supercritical liquid is an efficient transport medium for moving silicate-rich components from subducting slabs to the Earth’s surface, and that this process may have contributed to the growth of the continental crust.