Abstract
Many landslides have been occurred in the serpentine belt. It was seemed that the ease of the chemical weathering of serpentine were one of the reason. The chemical weathring characteristics were investigated. The perticles of serpentine were soaked in the carbonated water. The change of pH, clay minerals, cations in the eluate, elements, perticle size and shearing characteristics were obtained. It were clear that much Mg ion flowed out and the angle of shear resistance droped about 10° for three months.
