Abstract: Jiyang depression is a field where nonhydrocarbon is rich.These resources have close relation with the activities of the volcanos. At the same time,the activities of volcanos have deep contact with the activities of the faults. The growth of the faults in Jiyang depression is great. By the research of the index number of the faults growth and the other researches, NW direction faults are the most ones in Mesozoic, NW and NE and approximately EW directions all exist in Cenozoic. The above reflects the whole geotectonic background that sinistral shearing stress field exists in Mesozoic, but dextral shearing stress field exists in Cenozoic.

Key words: Jiyang depression, faults, growth index number, NW, NE, approximately EW

摘要： 济阳坳陷是非烃气藏的富集区。这些气藏与火山活动有密切的成生关系，同时火山活动与断裂活动也有密切的关系。济阳坳陷内断裂活动极为发育，通过断层生长指数等的分析，推断中生代断裂以北西向为主，新生代则兼有北西向、北东向和近东西向的断裂，上述断裂发育特征反映了该区的大地构造背景，在中生代是左旋的剪切应力场，在新生代则是右旋的剪切应力场。

关键词: 济阳坳陷, 断裂, 生长指数, 北西向, 北东向, 近东西向