2021 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)

Presentation information

Poster presentation

R1: Characterization and description of minerals (Joint Session with The Gemmological Society of Japan)

Fri. Sep 17, 2021 9:30 AM - 6:30 PM ePoster Session

9:30 AM - 6:30 PM

[R1P-10] Mineralogy of garnet from Mt. Kutsuna, Matsuyama, Ehime Prefecture

*Shota Oshima1, Yohei Shirose2 (1. Ehime Kensetsu Consultants Co.,Ltd, 2. Grad. Sch., Ehime Univ)

Keywords:garnet, Mt. Kutsuna, almandine, spessartine, garnet-biotite geothermometer


Garnet from the west coast of Mt. Kutsuna, Kitayoshida-cho, Matsuyama, Ehime Prefecture shows various properties such as color, grain-size, and shape. We describe the geology of Mt. Kutsuna and mineralogical properties of the garnet. The mineral species of garnet were almandine and spessartine bearing minor Mg, and Ca. Core-rim textures with inclusion were also observed. The metamorphic temperatures of the hornfels were estimated at 510 to 620 ℃ by garnet-biotite geothermometry.