Assistant Professor (Tenure Track) Kumamoto University, Priority Organization for Innovarion
and Excellence [May, 2007]
Assistant Professor Akita University, Faculty of Engineering and Resource Science [May, 2007]
JSPS Research Fellow Research Instisute for Humanity and Nature, Kyoto [April, 2006]
PosDoc Research Instisute for Humanity and Nature, Kyoto [April, 2005]
Research Associate Waseda University, School of Science and Engineering [April, 2003]
Ph. D. (Science) Tsukuba University, Institute of Geoscience [March, 2003]
Master (Science) Tsukuba University, Institute of Geoscience [March, 2000]
Bachelor Shinshu University, Department of Geology [March, 1998]
Main Research Subject
(1) Field of Aquatic Environmental Science: Sorry!! Under preparation
(2) Study of the origin and evolution process of volcanic and granitic rocks and genetical connection between volcanic rock and hydrothermal deposit, using Strontium (Sr)−Neodym (Nd)−Lead (Pb) isotope tracer; stable isotopes are useful to distinguish diverse regions such as oceanic slab, slab sediment, mantle wedge, and crustal material from the lower to upper crust as sources of arc magma. Intermediate to silicic magmatism is found commonly on the back-arc side of convergent margins, and is associated with hydrothermal deposits throughout the world. One must first understand the genesis of arc volcanic and granitic rocks, therefore, to study the associated ore mineralization. For better understanding of magma condition that promisingly produces hydrothermal deposit, plus in order to know an arc magma process itself in detail and the distribution of the mantle and crust, rocks in the southern Kyushu, southwest Japan are investigated.
(3) Study of the source and genesis of gold- and silver-bearing hydrothermal deposit, using Sr−Nd−Pb isotope tracer; hydrothermal ore forming fluid in the convergent margin have been thought to be derived from water circulated in the shallow crust (one to three km depth) such as meteoric water and/or magma water, during last century. However, the Deep Crustal Fluid contribution to it, which might be generated in the deeper crust of 10 to 30 km depth, was discovered recently at the world-class Hishikari hydrothermal gold deposit. To understand the spatial distribution of this fluid and the contribution to mineral deposit, gold- and silver-bearing quartz and adularia veins and hot spring water, distributed in wide area in southern Kyushu, are now examined. Better understanding of the Deep Crustal Fluid could supply important information for resource exploration and clues for the comprehension of earthquake mechanism.
(4) Investigation of the cause of destruction of stone material in the Angkor Wat, Cambodia, using Sulfur (S) and Strontium (Sr) isotope ratios; the destruction of sandstone that is the major construction material of the Angkor Wat, registered as a world heritage, may progress owing to the crystallizing pressure of secondary minerals, which are composed of elements concentrated via local rain water circulation through the rock. In here is under investigation which elements and source materials are related to the rock destruction and its process, considering the possible influence of environmental source region such as rain water, animal, vegetation, and artificial effluence.