Experimental approach for understanding non-equilibrium granite fluid interactions under supercritical hydrothermal conditions
Water-rock interaction under sub-and supercritical hydrothermal flow conditions has been carried out by using a flow-through type autoclave with a temperature gradient in order to predict the dissolution and precipitation behavior of granite. Reaction temperature ranges from 325 to 505 ℃. Dissolution of granite increased with temperature in the subcritical region (325-380 ℃) and decreased in the supercritical region (400-505 ℃). A precipitation dominant zone was recognized within the supercritical region. Elsewhere, quartz was the main dissolved mineral, and no distinctive dissolution of other minerals was observed. Depending on conditions of temperature and pressure, dissolution and precipitation phenomena in granite could be drastically changed due to properties of the fluid such as liquid-like and or vapor-like regions under supercritical condition.
N.Tsuchiya K.Takagi N.Hirano G.Bignall
Graduate School of Environmental Studies, Tohoku University, Sendai, Japan GNS Science, Taupo, New Zealand
国际会议
第十二届水-岩相互作用国际研讨会(P0roceedings of the 12th International Symposium on Water-Rock Interaction)
昆明
英文
391-394
2007-07-31（万方平台首次上网日期，不代表论文的发表时间）