概要

顔写真 Name: Kei IKEHATA
Affiliation: Faculty of Life and Environmental Sciences
Specialty: Earth Evolution Sciences
Field of Research: Petrology・Economic Geology・Geochemistry・Volcanology
Position: Assistant Professor
Degree: Ph.D.(science)
Degree earning University : Graduate School of Science, The University of Tokyo
(March 2009)
Starting Date: September 1, 2011
Mentor: Professor Yoji Arakawa
Laboratory: http://www.geol.tsukuba.ac.jp/~ikkei-hp/ikkei-index.html

Research on distribution and behavior of volatile and metal element in magmatic-hydrothermal system

(1)Knowledge of the volatile content of magma is of fundamental importance for understanding various magmatic processes, eruption styles and ore formation. Melt inclusions trapped in phenocrysts may retain dissolved volatiles of magmas, providing information on these concentrations. In this study, I will analyze major, trace and volatile element compositions for volcanic products (melt inclusion) of typical active volcanos in Japan in order to assess geochemical variation in these products with time during eruption. These data help to predict future volcanic activity and also understand various magmatic ore-forming processes below.

 

(2)Recent advances in MC-ICP-MS have made it possible to measure non-traditional (e.g., Cu, Fe, Zn) metallic stable isotopic ratios of geochemical samples with high precision and accuracy, which might enable us to assess ore-図1forming processes more directly. In this study, I will develop precise and accurate in situ methods for analysis of many non-traditional stable isotopic ratios in various ore-samples (Fig.1). Then, I will apply developed methods to ore samples from seafloor hydrothermal deposits (e.g., Izu-Ogasawara and Ryukyu arc) for understanding ore-forming processes of these deposits.