Abstract: There are many tectonic fissures in Q₂²-Q₃² loess at Zhuya, Shandong Province. The tensional fissures are filled with Ca-veins, the rapidly cracked fissures with mixed sand, .gravel and clay, the slowly constantly cracked fissures with fine sand and clay, and the compressional slip fissures with nothing. The latter two fissures are later than the former two in active period. The directions of the fissures are coinsident with the directions of regional tectonic lines, and their occurrences and mechanical characteristics are in agreement with regional contemporary tectonic stress field.The formation of these fissures in loess deposits is related to the position where the Zhuya scarp is located. Zhuya scarp lies in Wudi-Qingzhou active fault zone in the NW direction. Six moderate and strong earthquakes occurred at the intersection of NW- and NE-trending faults. Zhuya scarp is just located at the intersection of NE-trending Zihe and NW-trending Zibo-Zhuya active faults, where the stress can be easily accumulated. This area is more sensitive to tectonic movement.

Key words: Shandong Province, Zhuya scarp, Tectonic Fissures, Loess deposits

摘要： 山东朱崖一带Q₂²—Q₃²黄土中发育了许多构造裂缝。有封闭的张性裂缝、快速张裂的裂缝、缓慢持续张裂的裂缝及有摩擦面的压扭性裂缝,后两种裂缝形成时间晚。裂缝的的产状、力学特征与现代区域构造应力场有较好的相关性。朱崖黄土裂缝的形成与其所处的构造部位有关。朱崖位于NW向的无棣—青州(益都)活动构造带内,历史上NW向断裂与NE向断裂的交叉点上发生了六次中、强地震,朱崖位于NE向淄河断裂与活动的NW向淄博—朱崖断裂交叉点上,是应力易于集中、构造活动明显的部位。

关键词: 山东, 朱崖, 构造裂缝, 黄土