| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2010: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Research Abstract |
A sphere was repeatedly collided to the rock in water and the way in which the chemical weathering (dissolution) and the physical weathering (grain detachment) proceed was studied. The experiments using three sandstone samples differing in hardness (Leeb hardness) showed that the rate of the weightloss of the sample, corresponding to the physical weathering rate plus the chemical weathering rate,decreased with increasing rock hardness. The physical weathering rates were approximately 4-371 times greater than the chemical weathering rates determined from the solute concentrations in water. The relative contribution of the physical weathering increased with decreasing rock hardness.
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