Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences
2016 Annual Meeting of Japan Association of Mineralogical Sciences
Session ID : S2-17
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Host: Japan Association of Mineralogical Sciences

S2: Water Rock Interaction
Weathering and alteration products of volcanic sediments related to landslides by 2016 Kumamoto Earthquake
*Hiroshi Isobe, Masayuki Torii
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Keywords: Kumamoto earthquake, landslide, halloysite, weathering, alteration
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Abstract

2016 Kumamoto earthquake caused numerous landslides in Aso area even on relatively gradual slopes. Flat surface of landslide bottom lays in altered volcanic ash strata. XRD analysis revealed that the main component of the altered volcanic ash is halloysite (10Å). Strong earthquake may fluidize swellable clay minerals in gradual slopes.

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© 2016 Japan Association of Mineralogical Sciences
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