A variation trend has been pointed out in this paper that the geochemical background field descends gradually (i.e. high background field exists in the bas...

• 烃类湿度系数呈现西干东湿的变化趋势。主要含油气盆地地球化学场与地热梯度具有明显的相关性,揭示了两者间的成因关系。