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 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。
