[P-PS05] Mars

[PPS05-12] Characterization of Martian Regolith: Toward 2020s Mars Exploration Missions

*臼井 寛裕¹、Akihiko Yamagishi²、Takehiko Sato³、Hideaki Miyamoto⁴、Shingo Kameda⁵、Kazuhisa Fujita³、Yasuhito Sekine⁴、Shogo Tachibana⁶、Sei-ichro Watanabe⁷ (1.Tokyo Institute of Technology、2.Tokyo University of Pharmacy and Life Science、3.ISAS, JAXA、4.The University of Tokyo、5.Rikkyo University、6.Hokkaido University、7.Nagoya University)

キーワード：Mars, regolith

Mars once had surficial liquid water (paleo-ocean/lake) and shows a promising sign of current subsurface water/ice. The existence of hydrosphere and cryosphere makes Mars the unique accessible habitable planet next to the Earth. The water-rock interaction between the lithosphere and hydrosphere/cryosphere through the history of Mars has produced a variety of surface rocks (regolith) containing sheet-silicates, phosphates, sulfates, and carbonates, which are closely linked to climate and the potential for life on Mars. This study characterizes the physico-chemical properties (chemical composition, mineral abundance, reflectance feature, and geometric distribution) of Martian regoliths. We further present a way to leverage the database on Martian regoliths as a tool for interpreting remote sensing analyses by onboard instruments (e.g. Life Detection Microscope) for Mars exploration missions in 2020s.