日本地球惑星科学連合2019年大会

講演情報

[J] ポスター発表

セッション記号 M (領域外・複数領域) » M-IS ジョイント

[M-IS11] 水惑星学

2019年5月28日(火) 15:30 〜 17:00 ポスター会場 (幕張メッセ国際展示場 8ホール)

コンビーナ:関根 康人(東京工業大学地球生命研究所)、臼井 寛裕(東京工業大学地球生命研究所)、福士 圭介(金沢大学環日本海域環境研究センター)、渋谷 岳造(海洋研究開発機構)

[MIS11-P13] エンセラダスの海底下地震断層運動の再現実験

*廣瀬 丈洋1渋谷 岳造2 (1.国立研究開発法人海洋研究開発機構 高知コア研究所、2.国立研究開発法人海洋研究開発機構 横須賀本部)

キーワード:エンセラダス、地震断層、熱水

The discovery of the Na-rich ice particles erupting from the surface of Enceladus indicates the presence of hydrothermal activity in Enceladus' ocean. Knowledge of water chemistry of the interior ocean is crucial for exploring planetary habitability and life. Two different processes of water-rock interaction can define the water chemistry in Enceladus' ocean: one is the static chemical interaction at the hydrothermal regions over geological timescale, and the other is the dynamic chemical interaction associated with seismogenic faulting induced by tidal force between Enceladus and Saturn or neighboring satellites. In this study, we focus on the later short-time disequilibrium interaction between water-rock during faulting. By using high-velocity friction experiment, we plan to reproduce faulting processes that are expected to occur in the interior of Enceladus, and then evaluate quantitatively the effect of the disequilibrium interaction during faulting on the water chemistry of the interior ocean. In the poster, we will present outline of the apparatus and pilot results of the experiments using San Carlos olivine and synthetic chondrite as starting materials.