松辽盆地深源二氧化碳气分布及其控制因素

Factors Controlling Carbon Dioxide Gas Distribution in Abyss Area of Songliao Basin

以盆地内六处二氧化碳气田为例，阐述了它们形成的地质条件及成因类型的地化指标。松辽盆地侏罗纪末的强烈构造运动导致了深断裂活动和火山岩浆喷发，喷发时形成的二氧化碳气是该盆地无机成因二氧化碳气的主要来源，基底深断裂发育与晚侏罗纪火山岩建造的形成与分布相配置的地区是深源无机成因二氧化碳气分布的有利地区。

Based on the analysis of geologic formation conditions and geochemical indications of genetic type of CO 2 in six CO 2 gas fields of Songliao Basin, it is concluded that gas CO 2 caused by the deep seated faulting and the volcanic magma eruption during the late Jurassic period is the main resources of abiogenic CO 2.And the places such as Yingcheng Coal Field and Wudalianchi area,where the development of deep foundamental fault coexists with the formation of late Jurassic period volcanic rock, are more rich in CO 2 in organically originated than in any other places.