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Introduction
Now I'm working on the Isotope geochemistry for understanding Cenozoic climate changes. I am trying to elucidate the silicate weathering feedbacks in the global carbon cycle during the early Paleogene using osmium (Os) isotope analysis of marine sediments.
Current institution
Additional affiliations
Education
April 2018 - March 2020
April 2014 - March 2018
The University of Tokyo
Field of study
- Isotope Geochemistry
Publications
Publications (9)
The early Paleogene, including the Paleocene and Eocene, is characterized by Warmhouse and Hothouse climate states with superimposed transient warming events known as hyperthermals. While these paleoenvironmental changes are well‐documented in the Pacific and Atlantic Oceans, records of such changes in the Indian Ocean are limited. Here, we present...
Deep-sea mud enriched in rare-earth elements (REEs), termed REE-rich mud, is a promising seafloor mineral resource. A decade of surveys has revealed that the mud with the highest REE concentration occurs in the pelagic realm of the western North Pacific Ocean, with two layers of elevated REE concentration. Previous analyses of sediments have reveal...
The Late Devonian, during which one of the “Big Five” Phanerozoic mass extinction events occurred, was one of the most important time intervals in Earth history. Nevertheless, the paucity of deep-sea records due to subduction has hampered elucidation of the pelagic environment during the Late Devonian in Panthalassa. However, ancient hydrothermal f...
We report geochemical and isotopic data for umber and related greenstone samples from the Aki umber deposit in the Northern Shimanto Belt, central Shikoku, southwest Japan. The greenstone underlying the umber deposit shows a geochemical signature typical for mid-ocean ridge basalts. Umber samples are characterized by notable enrichments in Fe, Mn,...
The solid earth plays a major role in controlling Earth’s surface climate. Volcanic degassing of carbon dioxide (CO 2 ) and silicate chemical weathering are known to regulate the evolution of climate on a geologic timescale (> 10 ⁶ yr), but the relationship between the solid earth and the shorter (< 10 ⁵ yr) fluctuations of Quaternary glacial–inter...
