Interaction between chemical and physical processes in rock weathering

在水中，将球体与岩石反复碰撞，研究了化学风化（溶解）和物理风化（颗粒剥离）的进行方式。用三种不同硬度（里氏硬度）的砂岩样品进行的实验表明，样品的失重率（对应于物理风化率加上化学风化率）随岩石硬度的增加而降低。物理风化率约为4-371倍，大于从水中溶质浓度确定的化学风化率。物理风化的相对贡献随岩石硬度的降低而增加。

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.