R7: Petrology, Mineralogy and Economic geology (Joint Session with Society of Resource Geology)

[R7-09] In-situ heating TEM experiments of minerals with laser irradiation system

*Akira MIYAKE¹, Yuki SUZUKI¹, Yohei Igami¹, Ryuichi Nomura², Mitsutaka Haruta², Ichiro Ohnishi³, Hiroki Hashiguchi³ (1. Kyoto Univ. Sci., 2. Kyoto Univ., 3. JEOL Ltd.)

Keywords:electron microscope, in-situ experiment, laser irradiation

We performed in situ laser heating experiment of minerals, quartz and clinoenstatite in a TEM. We observed the twin in quartz formed by transition from high temperature phase to low temperature phase in the quench experiment from 1500 mW laser irradiation power. Specific diffraction spots in clinoenstatite disappeared at 2300 mW laser irradiation. This means that the transition to high temperature phase occurred, though we could not determine whether this phase was high clinoenstatite or protoenstatite.