R5: Extraterrestrial materials

11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)

[R5-10] The application of the XAFS method and oxidative hydrothermal alteration experiments from reproduced I-type cosmic spherules

*Huimin Shao², Hiroshi Isobe¹, Ginga Kitahara², Akira Yoshiasa¹ (1. Kumamoto Univ., 2. Kumamoto Univ., Grad. Sch. Sci. Tech)

Keywords:

Martian hematite,oxidative hydrothermal alteration,XAFS,cosmic spherules

Oxidative hydrothermal experiments on reproduced I-type cosmic spherules are carried out to be applied on the formation mechanism of Martian hematite spherules. XAFS analysis on run products revealed that oxidation of I-type cosmic spherules could progress in neutral conditions rather than acidic conditions.