Research Introductions

Research Introductions

Geosphere Science is the study of the Earth. It deals with the compositions of Earth materials, Earth structures, and Earth processes from ancient time to the future. It is concerned with the interactions of the Earth’s deep geology with surface processes. The Earth provides us a great variety of topics. Any studies of Geosphere Science (Geoscience) field will contribute to solve the possible problems related to Earth environment, natural resources and hazards etc in a future time. In our department, the following four research groups advance further investigations each day; 1) Mineral and Resource Science, 2) Earth Evolution, 3) Petrology and 4) Applied Geoscience.

REE-rich three new minerals are discovered from Ise, Japan in our joint study (Yamaguchi Univ., Univ. Tokyo, and Ehime Univ.). One of them is “Ferriakasakaite-(La)” having the complicated chemical composition and crystal structure.

Natural ilmenite (upper left) and synthetic pyroxene crystals. The formation environment, such as temperature, leads a variety of the mineral morphology. Very thin step-like layers on the crystal surface give us a clue of their formation condition.

Applied Geoscience RG

We have conducting research on crustal deformations such as earthquakes and faults, active tectonics, and landslides, and provide a clue to predict future geological disasters.
Main research topics are;

  1. Earthquakes, active faults, and active tectonics in Japan
  2. Deformation in an accretionary prism and subduction zone earthquakes
  3. Mineralogy and physical properties of fault zone materials
  4. High-velocity friction experiments and physic-chemical process in fault zones
  5. Monitoring and material analysis of a landslide

Investigation of the damage due
to debris flow at Yamaguchi prefecture.

Field observation on a melange zone of the Permian accretionary prism in northern Kyushu

An example of pseudotachylyte that is formed by frictional melting during rapid fault motion (an evidence for paleo-earthquake). We are trying to reproduce seismic fault motion in a laboratory.

We also join to an international drilling program for crustal faults and subduction zones (ICDP/IODP).