Ancient Volcano Eruption Features in YongqingIArea Jixi Basin

As Paleogene lignite resource rich reserve,Jixi basin Yongqing ⅠArea is the important coal base.By the analysis of ancient volcano eruption characteristics in Yongqing ⅠArea,this article states the volcano eruption types,volcano rock assemblage characteristics,the size of volcano pipes,the relation of volcano channels and structures,the effects of volcano eruptions on the coal quality and seams in the area,the relation of the volcano eruptions and bedrock intrusions in the area and so on.