R7: Petrology, Mineralogy and Economic geology (Joint session with SRG)

[R7-04] Attenuated Total Reflection Infrared (ATR-IR) Spectroscopy of Serpentine Minerals

*Ilona Sakaguchi¹, Yui Kouketsu¹, Katsuyoshi Michibayashi¹, Simon Wallis² (1. Nagoya University, GSES , 2. The University of Tokyo, EPS)

Keywords:Attenuated total reflection infrared (ATR-IR) spectroscopy, Serpentine minerals, Antigorite, Chrysotile, Lizardite

We used attenuated total reflection infrared spectroscopy (ATR-IR) to characterize the infrared spectra of antigorite, chrysotile and lizardite from samples from Mt. Shiraga serpentinite body. The ATR-IR method proved to be a reliable and simple method to distinguish the three serpentinine minerals from each other. We also applied ATR-IR to map areas with multiple mineral phases in order to demonstrate the possibilities of this technique in analyzing thin section scale microstructures.