Toshitsugu Yamazaki / Professor / Division of Environmental Studies
Department of Natural Environmental Studies / / Paleomagnetism and rock magnetism, marine geology and geophysics

Career Summary
March 1981: Graduated from Faculty of Science, Kyoto University
April 1981: Researcher, Marine Geology Department, Geological Survey of Japan
April 1992 - March 1993: Senior staff, Ocean Development Division, Science and Technology Agency, Japan
February 1994 - March 1995: Visiting Associate, California Institute of Technology
March 2000 - March 2001: Vice-Director, Research Planning Office, Geological Survey of Japan
April 2001: Senior Researcher, Institute for Marine Resources and Environment, Geological Survey of Japan, AIST
June 2002: Group Leader, Institute for Marine Resources and Environment, Geological Survey of Japan, AIST
May 2004: Group Leader, Institute of Geology and Geoinformation, Geological Survey of Japan, AIST
April 2006 - August 2012: Guest Professor, Graduate School of Life and Environmental Sciences, University of Tsukuba

Educational Activities

Research Activities
(1) Paleointensity of the geomagnetic field using marine sediment cores
(2) Application of rock-magnetic technique to paleoceanography (environmental magnetism)
(3) Moving hotspot and mantle dynamics
(4) Tectonics of Philippine Sea plate

1) Yamazaki, T., Yamamoto, Y. Acton, G., Guidry, E.P., and Richter, C. (2013) Rock-magnetic artifacts on long-term relative paleointensity variations in sediments. Geochem. Geophys. Geosyst. (G-cubed), 14, 29-43, doi:10.1029/2012GC004546
2) Yamazaki, T., and Ikahara, M. (2012) Origin of magnetic mineral concentration variation in the Southern Ocean. Paleoceanography, 27. PA2206, doi:10.1029/2011PA002271.
3) Koppers, A.A.P., Yamazaki, T., Geldmacher, J., Gee, J.S., Pressling, N., Hoshi, H. et al. (2012) Limited latitudinal mantle plume motion for the Lousville hotspot, Nature Geoscience, 5, 911-917, doi:10.1038/NGEO1638
4) Yamazaki, T. et al. (2010) Philippine Sea Plate motion since Eocene estimated from paleomagnetism of seafloor drill cores and gravity cores. Earth Planets Space, 62,495-502.

Other Activities
Member of the Japan Geoscience Union, Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS), Paleosciences Society, Geological Society of Japan, Japan Society for Marine Surveys and Technology, and American Geophysical Union
Vice president, Society of Geomagnetism and Earth, Planetary and Space Sciences (2013-present)
Chair, IDOP Division, Japan Drilling Earth Science Consortium (J-DESC)(2009-2010)
IODP Science Planning Committee member (2009-2011)

Future Plan
Paleomagnetism and rock magnetism have extensive overlap to related fields including biology and planetary sciences as well as geology and geophysics. I want to contribute to opening up a new research frontier by transdisciplinary approaches. One of my current research topic is the possible relationship between geomagnetic field variations and paleoclimate.

Messages to Students
Curiosity and patience are crucial for scientific researches. Marine geology and geophysics are interdisciplinary, so I welcome those who have a background in physics, biology, and chemistry as well as geology.