Abstract: The features of deep-reaching faults controlling the regional structures in the northeastern area of China were analyzed. Further more, the evolution laws and magmatism of all structural geological units, and their controlling effects on the formation and evolution of basins were discussed. The forming environment of carbon dioxide was elaborated. The carbon isotope data of carbon dioxide, ³He to ⁴He rado and the inverted sequence of methane-ethane-propane isotope proved that the gas reservoirs in this area were resulted from the inorganic mantle source gas. The genesis mechanism and distribution scope of carbon dioxide were disscusssed on the relations of carbon dioxide with deepreaching faults, magmatites and volcanic rocks. And then, the types, accumulative laws and liquid properties of carbon dioxide gas reservoirs were primarily researched.

Key words: regional structure, deep-reaching fault, carbon dioxide reservoirs, genesis mechanism, accumulative law, carbon isotope, northeastern area of China

摘要： 对东北地区区域构造进行了研究,分析了对该区有控制作用的各个深而大的断裂的特征,进而研究了各构造地质单元的演化规律、岩浆作用及其对盆地形成、演化的控制作用。在此基础上,阐述了CO₂气的形成环境。CO₂的碳同位素资料,³He/⁴He比值及甲烷、乙烷、丙烷同位素的倒序证明了该区的气藏属于无机幔源气。基于CO₂与深大断裂和岩浆岩、火山岩的关系,论述了盆地中CO₂的成丙机制和分布范围以及CO₂气藏的类型、聚集规律、流体性质等。

关键词: 区域构造, 深断裂, 二氧化碳气藏, 成因机制, 聚集规律, 碳同位素, 中国东北地区