在地表露头,浅部坑道及深部(地表300米以下)隧道和断层带的矿井中,都观测到断层泥。这些断层泥2微米的碎片可能组成露头总体的百分之几到百分之五十以上。2微米的碎片是由多种矿物(和蒙脱土、伊利石、高岭石、缘泥石、蛭石及混和层粘土)和一些石英、长石等组成。虽然我们还不能从断层泥的研究中直接得出结论:在哪些浅源大地震发生的地方存在有类似的断层泥。但根据以下几点,它们确实有可能存在:(1)几种粘土现有的平衡资料;(2) Fault muds were observed in outcrops, shallow tunnels and deep (tunnels below 300m) tunnels and fault zones. The 2-micron debris of these fault muds may make up a few percent to over fifty percent of the total outcrop. 2-micron debris is composed of a variety of minerals (and montmorillonite, illite, kaolinite, margin mud, vermiculite and mixed clay) and some quartz, feldspar and other components. Although we can not yet conclude directly from the study of fault mud: similar fault mud exists in the places where shallow earthquakes occurred. However, they do exist according to the following points: (1) the existing balance data for several clays; (2)