黄土在我国分布面积约六十三万平方公里,其规模和厚度堪称世界之首。它掩盖了各种古地形,极大地缓和了基岩原始地面的起伏及切割度,为工农业建设提供了良好的场地。另一方面它又遮蔽了基岩构造,尤其是现今正在活动的构造带,给国民经济建设带来了许多隐患。所以,正确分析并判定黄土中的活动断裂,以及它们与非构造破裂的区别就 Loess in China, an area of ​​about 630,000 square kilometers, its size and thickness of the first in the world. It masks a variety of ancient terrain, which greatly eased the undulating and cutting of the original ground bedrock, providing a good venue for industrial and agricultural construction. On the other hand, it also masks the bedrock structure, especially the tectonic belt that is currently active, bringing many hidden dangers to the national economic construction. Therefore, the correct analysis and determination of active faults in loess and their difference from non-structural faults