Petrological and mineralogical data collected from the Mizunami Underground Research Laboratory construction site; Bulk chemical composition, mineral occurrence and mineral composition
Yuguchi, Takashi; Tsuruta, Tadahiko ; Mizuno, Takashi ; Kunimaru, Takanori
Tono Geoscientific Research Unit of Japan Atomic Energy Agency (JAEA) is carrying out the Underground Research Laboratory Project, which is a scientific study revealing the deep geological environment as a basis of research and development for geological disposal of high level radioactive wastes. The aim of the project is to establish comprehensive techniques for the investigation, analysis and assessment of the deep geological environment in fractured crystalline rock, and to develop a range of engineering techniques for deep underground application. This project has three overlapping phases: Surface-based investigation phase (Phase I), Construction phase (Phase II), and Operation phase (Phase III), with a total duration of about 20 years. Nowadays, the project is under the Phase II. Phase I and II conducted the following kinds of analyses for rock samples, which was collected from the Mizunami Underground Research Laboratory construction site. (1) Bulk chemical composition analyses (major and minor elements), (2) X-ray diffraction analyses, and (3) Mineral composition analyses. Petrological and mineralogical data is a basic information for the planning of mass transfer study in Phase III investigation. Thus, this paper compiled the results of these analyses. Thus, this paper compiled the results of these analyses.