中文摘要：

为在在 Yangtze 峡的 Jiulongwan 节的 Doushantuo 帽子碳酸盐，它氧化还原作用的集中敏感元素在地层学建议二不同丰富。这些丰富分别地在帽子碳酸盐的底部上面发生在大约 0.8 m 和 3.3 m。他们由于渗出的甲烷的氧化作为暂时的缺氧的 depositional 条件被解释。帽子碳酸盐的 REE+Y 模式与不同式样被分类进三种类型：(1 ) 从底部到 2.45 m，代表淡水的行为并且建议那巨大融化水在冰川的消失期间聚集了进表面海洋；(2 ) 从 2.45 m 到 3.3 m，可能显示古老的海水的模式由于在深水的 welling 上面；并且(3 ) 从 3.3 m 到“最高的、出现 MREE 膨胀”有由于成岩作用的 HREE 弄空的模式。三阶段的 REE+Y 模式在这个区域在 Marinoan 冻结成冰的 wake 代表浅水的转变：新鲜融化水首先是主导的，然后它由违反并且在 welling 上面使融合了进海洋的盆。浮游生物的花蕾进一步在水沉积接口附近介绍了血缺氧。

英文摘要：

For the Doushantuo cap carbonate at the Jiulongwan section in the Yangtze Gorges, its concentrations of redox sensitive elements suggest two distinct enrichments in stratigraphy. These enrichments occur at about 0.8 m and 3.3 m above the bottom of cap carbonate, respectively. They are interpreted as the temporary anoxic depositional conditions due to the oxidation of seeped methane. REE＋Y patterns of the cap carbonate are classified into three types with different styles： （1） from the bottom to 2.45 m, representing the behaviors of freshwater and suggesting that massive meltwater swarmed into surface oceans during the deglaciation; （2） from 2.45 m to 3.3 m, indicating the pattern of ancient seawater possibly due to upwelling of deep water; and （3） from 3.3 m to the top, showing ＂MREE bulge＂ pattern with HREE-depletion as a result of diagenesis. The three-stage REE＋Y patterns represent the transformations of shallow water in the wake of the Marinoan glaciation in this region： the fresh meltwater was dominant first, and then it interfused into the oceanic basin by the transgression and upwelling. Bloom of plankton further introduced anoxia near the water-sediment interface.