Role of Water in the Deep Earth
- Research Project using a New Neutron Source -
The Earth is sometimes called as “Water planet”, which means the existence of water is a characteristic feature of our planet. Water plays important role, not only on the surface, but in various phenomena inside the Earth. However, X-ray diffraction, which was so far the most powerful tool to study the Earth’s materials, cannot see hydrogen directly. The purpose of this “Innovated Area” is to construct a new beam line dedicated to the present research project at J-PARC, a new pulsed-neutron source of the world leading class, which has just started the operation in 2008. Then a new high-pressure and temperature apparatus for neutron diffraction experiments will be developed and installed in this beam line. Using these new facilities, various studies to clarify the behavior of water in hydrous minerals and magmas will be conducted under the condition corresponding to that from the crust to the top of the lower mantel. Ultimate goal is to understand the role of water (and hydrogen) in various phenomena inside the Earth from the atomic levels.
(Project Leader, Takehiko Yagi, Institute for Solid State Physics, University of Tokyo)