郯庐断裂带中段的沂沭断裂带是由近于平行的四条断层构成的一条活动断裂带。我们利用扫描电镜测定了沂沭活动断裂带断层泥石英颗粒的表面形貌。认为保存下来的石英颗粒表面标志不仅可以揭示断裂带的话动性,而且也能揭示一系列构造运动的历史。 The Yishu fault zone in the middle section of the Tan-Lu fault zone is an active fault zone formed by nearly four parallel faults. We used scanning electron microscopy to determine the surface topography of the mudstone particles in the Yishu active fault zone. It is believed that the preserved quartz grain surface not only reveals the fracture zone mobility, but also reveals a series of tectonic movements.