新构造应力作用形迹系列的发现

DISCOVERY OF TRACE SYSTEM CAUSED BY PRESENT STRUCTURAL STRESS FIELD

近年来，笔者相继发现黄土构造节理系［１］、松散土层破裂［２］和黄土沟槽网络［３］。野外考察证实，黄土构造节理和松散土层破裂是新构造应力场作用的直接产物；成系统土层沟槽（合黄土沟槽）是黄土构造节理和松散土层破裂的地貌反映；许多水文网［４］常常是成系统的土层沟槽进一步发展后连通的结果，三者间有着密切的成生联系，都是区域新构造应力场作用的痕迹，组成形迹系列。

The structural joint systems [fi,cracks in loose layer[2] and ground trenches [3] have been discovered in loess formation in recent years' Field geological investigations have proved that these structural joints of loess and cracks in loose layer are directly caused by present structural stress field,and the ground trenches are the correspondingly geomorphologic features. Many hydraulic trench systems[4] in loess formation are often developed by further expansion of ground trenches. Therefore,the authors of this paper summerise that there is a close relationship among the joint systms .soil cracks and ground trenches,and all of these are directly associated by present structural stress field to constitute a trace system.