S2: 岩石-水相互作用 （スペシャルセッション）

[S2-09] 静的相平衡解析による地殻破壊および流体流れのダイナミクスの評価

*ミンダリョワ ディアナ¹、宇野 正起¹、永冶 方敬²、土屋 範芳¹ (1. 東北大学、2. 東京大学)

キーワード：流体フラックス、水和反応、反応帯、地殻破壊

We constrain fluid fluxes by thermodynamic modeling of fluid chemistry in the metamorphic fluid-rock reaction zones and discuss their relation to potential seismic events based on shear fracturing evidence. We investigated reaction zones in hydrated metamorphic rocks samples from the Mefjell and Brattnipene Sør Rondane Mountains, East Antarctica. Here we analyse samples underwent rapid hydration (~10 h) and permeability evolution from low-permeable (~10⁻²²–10⁻²⁰ m²) to highly-permeable rocks (~10⁻⁹–10⁻⁸ m²) related to crustal fracturing at depths around 10-20 km.