Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences
2016 Annual Meeting of Japan Association of Mineralogical Sciences
Session ID : S2-09
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S2: Water Rock Interaction
Permeability change generated by silica dissolution-precipitation on granite fracture surface in hydrothermal conditions.
*Hiroto TanakaAtsushi OkamotoNoriaki WatanabeNoriyoshi Tsuchiya
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Abstract

Fractures provide significant influences on transport of energy and heat. We conducted hydrothermal flow through experiments using pure water and silica supersaturated solution to reveal a porosity structure and permeability evolution during the dissolution-precipitation in granite fracture. In dissolution experiments, local dissolution of Qtz Gouges made some flow paths and increase fracture permeability. In precipitation experiments, silica precipitation strongly decreased the permeability.

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© 2016 Japan Association of Mineralogical Sciences
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