Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences
2016 Annual Meeting of Japan Association of Mineralogical Sciences
Session ID : S2-12
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S2: Water Rock Interaction
Garnet-forming dehydration reactions and fluid migration in subduction zone
*Atsushi OkamotoHiroyuki Shimizu
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Abstract

Fluids released from dehydration reactions are thought to rise pore fluid pressure within subduction zone; however, little evidence has not been reported from metamorphic rocks. We report skeletal garnet in metachert, which contains large amount of quartz inclusions. The microstructural observations suggest grain-boundary cracking induced by dehydration. By using a model with distinct element method, the conditions and mechanism of reaction-induced fracturing and fluid flow are discussed.

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© 2016 Japan Association of Mineralogical Sciences
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