Forming factors of phosphorite in Lower Cambrian of Kuruktag,Xinjiang
CUI Kun-ning, CHENG Ri-hui, LIU Wan-zhu, YU Min-feng College of Earth Sciences, Jilin University, Changchun 130061, Jilin, China
On the basis of the characteristics of stratigraphy and petrology, this study focuses on the forming environment, origin and mechanism of the phosphorite in Lower Cambrian of Kuruktag, Xinjiang. It is considered that the phosphorite in this area formed in a comparatively wide environment from the sites above or below the basement surface of wave to the sites around the oxygenic surface. And there are two sources for the phosphorite 's origins. One is from hot liquid and the other is from living things. Those chemical processes were transported by the raising ocean currents and deposited, and then they underwent the mechanism of stream and wave, as well as the event of slip slide caused by gravity. There were three sea-level change cycles during Xishanbulake stage. The phosphorite was the result of the earlier sea-level change. This whole process of phosphorite sedimentation occurred in the background of high rank of transgression.
【CateGory Index】： P581