黄陵背斜陡山沱组沉积相对比分析与磷矿成因研究

Sedimentary Facies of the Doushantuo Formation of the Huangling Anticline and Genesis of Phosphorite Deposits

黄陵背斜处于扬子地台上扬子台褶带的东缘。该背斜东边为当阳向斜,西边为秭归向斜,三者轴向几乎互相平行,方位近似南北向,仙女山断裂位于其西南部。在对该地区其中两个剖面(青林口剖面和樟村坪岩心剖面)进行细致测量研究,发现这两个剖面的陡山沱组岩性主要为白云岩,并且沉积构造复杂,因此该地区的沉积相非常有研究价值,两者可以进行对比研究。另外,樟村坪地区发现有大量的磷矿,我们对这些磷矿的形成机理也进行了分析研究。

The Huangling anticline lies on the eastern edge of the upper Yangtze fold belt of the Yangtze platform. It is between is the Dangyang syncline in the east and the Zigui syncline in the west, their axes are almost parallel to each other, nearly longitudinal. The Xiannvshan fault is located in the southwest. Study of the Qinlingkou section and the Zhangcunping section indicates that the Doushantuo Formation consists mainly of dolomite with complicated sedimentary structure. Their sedimentary facies is of important research value. This paper deals with phosphorite deposit in the Zhangcunping region.