In paleo-granulite area, the rock mass is strongly weathered to great depths, but the weathering depths are quite different anywhere, on the surface, it mainly appears in loose state.

• 古老变粒岩地区,岩体风化剧烈、风化深度大且各处风化深度差异极大,地表多呈散砂粒状,该文对其在水利水电工程地质勘察中遇到问题进行了深入研究,初步掌握了古老变粒岩区岩体风化规