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동결-융해작용에 따른 암석풍화의 특성 - 유문암, 현무암, 응회암을 중심으로-

The Characteristics of Rock Weathering due to Freeze-Thawing – Focused on Rhyolite, Basalt, Tuff –

양재혁
한국지형학회 (The Geomorphological Association Of Korea)|2018.03|한국지형학회지 (Journal of The Korean Geomorphological Association)|제25권 제1호|pp. 47-65|DOI 10.16968/JKGA.25.1.47

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참고문헌

키워드

암석풍화Rock weathering동결-융해응회암유문암현무암freeze-thawingRhyoliteBasaltTuff
주제분류지리학

초록

Frost shattering has traditionally been considered as one of the most effective process in rock weathering. Each slab specimens of five or six rhyolite, basalt and tuff was prepared and put in freeze-thaw cycles and repeated 300 times in the temperature of -25°C to +30°C and their weathering patterns and products were analyzed by surface observation, particle size, XRD and thin section. As the result, some changes were observed in weathering patterns and weathering products. Rock shattering was more active in waterlogging rather than atmospheric conditions, but there are many differences depending on the type of rock. Rhyolite is hardly weathered by 300 times freeze-thaw cycles and generates the least amount of weathering products. Weathering of Basalt is limited to the surface layer where water can be absorbed, and produces a few amount of platy-shape debris. Tuff are separated by blocky structure which the particles are aggregated along their edges rather than enlarged existing cracks/joins or generated new joints.

Abstract

Frost shattering has traditionally been considered as one of the most effective process in rock weathering. Each slab specimens of five or six rhyolite, basalt and tuff was prepared and put in freeze-thaw cycles and repeated 300 times in the temperature of -25°C to +30°C and their weathering patterns and products were analyzed by surface observation, particle size, XRD and thin section. As the result, some changes were observed in weathering patterns and weathering products. Rock shattering was more active in waterlogging rather than atmospheric conditions, but there are many differences depending on the type of rock. Rhyolite is hardly weathered by 300 times freeze-thaw cycles and generates the least amount of weathering products. Weathering of Basalt is limited to the surface layer where water can be absorbed, and produces a few amount of platy-shape debris. Tuff are separated by blocky structure which the particles are aggregated along their edges rather than enlarged existing cracks/joins or generated new joints.

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