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

[R1P-02] Transmission Kikuchi diffraction analysis using a SEM apparatus and its application to fine grains within ultramylonitic peridotite

*Yohei Igami¹, Katsuyoshi Michibayashi² (1. Kyoto Univ., 2. Nagoya Univ.)

Keywords:transmission Kikuchi diffraction (TKD), EBSD, olivine, ultramylonite, peridotite

We report the application of transmission Kikuchi diffraction (TKD) analysis using the scanning electron microscope (SEM), which is capable of high-spatial-resolution crystallographic texture analysis, to an ultramylonitic peridotite sample. We successfully obtained TKD maps with high spatial resolution and with highly reliable indexing using a conventional W-SEM with a standard electron backscattered diffraction (EBSD) system. TKD efficiently analyzed the crystallographic textures of polycrystalline rocks consisting of submicrometer-order grains.