对鱼台盆地的新认识

通过对鱼台盆地中微体古生物、重力地震资料的研究 ,把丰钾 3井、78- 4井原划分之下第三系官庄组划归下白垩统 ;把原划分之官庄组修正为三垛组、戴南组、阜宁组四段。从而认为鱼台盆地是一个统一的盆地 (而非师砦、欢口、鱼台三个被此独立的凹陷 ) ,且曾有海水进入。盆地的沉降中心和成钾有利部位是在北部的李阁附近 ,目前师砦见盐孔位于盆地的斜坡部位。

NEW THOUGHTS ON YUTAI BASIN

Analyses of the micropaleontological and seismological data concerning the Fengjia No.3 and No.4 boring wells of the Yutai basin were performed, allowing a striking change in the original stratigraphic division, namely, the Guanzhuang formation incorporated from Tertiary into Cretaceous and revised as consisting of the original Sanduo formation, Dainan formation and the forth member of the original Funing formation. The incorporation and revision should probably prove that the Yutai basin represents a complete basin rather than three independent depressions of Sizhai, Huankou and Yutai, providing a access to it for sea water. The center of the basin or favorable part for potash deposition is near Lige village in the north but drilling construction came into contact with potash layers only at the slope of the basin in Sizhai.