Carbon isotopic characteristics of hydrocarbon gases from coal-measure source rocks——A thermal simulation experiment

1 IntroductionThe compositional characteristics of natural gasesand their carbon isotopic composition are controlledmainly by the type of organic matter and the degree ofits thermal evolution in the source rocks (Song Yan,1995; Xu Yongchang et al., 1994; …     

基于地理探测器的浑善达克沙地植被变化定量归因

开展区域植被覆盖变化及驱动机制研究具有重要的意义.选取浑善达克沙地为研究区,基于地理探测器模型,定量研究了7个驱动因子对区域植被变化的单独影响及交互影响.结果 表明:(1)2000-2018年,浑善达克沙地68.83％的区域植被覆盖在增加,其中显著增加的区域集中在研究区的中部和南部,即阿巴嘎旗、锡林浩特市、正蓝旗、正镶...