准噶尔盆地陆东地区侏罗系剥蚀厚度恢复

THE RESTORATION OF THE JURASSIC STRATA EROSION THICKNESS IN THE LUDONG OF JUNGGAR BASIN

恢复地层剥蚀厚度的方法众多,但它们都有或多或少的使用条件。针对准噶尔盆地陆东地区的资料条件和地质条件,采用邻层厚度比值法,并结合传统的沉积速率法,对侏罗系地层剥蚀厚度进行恢复。从恢复结果来看,西山窑的剥蚀厚度盆地中央厚四周薄,其中石南凹陷、三南凹陷、乌伦古凹陷及该区南缘几乎未被剥蚀;头屯河组的大部分地层均被剥蚀。这一恢复结果与当时的沉积、构造环境基本吻合,从而证明了这种方法是切实可行的。

There are many ways to renewing erosion thickness.But they are limited more or less.Aiming at the condition of the geological and data of the Ludong area,in the article,ways to renew the strata erosion thickness in the Jurassic by using of the method of the thickness ratio of the adjacent layers and the method of sediment velocity.From the results,It is shown that it is thicker in the centre of the area than in the fringe of the area in the strata erosion thickness of the Xishanyao group.But the strata are almost not eroded in the Shinan,Sannan,Wulungu depress and the south of area.The most strata of the Toutunhe group have been eroded.The renewing result accords with sediment and structure environment of the time.It proves that the method is feasible.