Environmental Factors Relating to Quaternary Phosphorite Formation on the Peru Shelf

对磷化形成和矿化率的控制将通过对大陆架上部几米沉积物的分析来确定，这些沉积物来自ODP第112阶段取样的岩心，以及将在未来两次考察中取样的几个宽直径岩心。通过对底栖有孔虫的稳定同位素分析、散在的自生矿物和壳类物质的体积沉积物定年和绝对定年，获得详细的年代地层分析。这些数据将使pi能够将磷化的形成和发生与数百年至数万年的时间尺度上的环境参数联系起来。

The controls on phosphorize formation and mineralization rates will be determined by analysis of the upper several meters of the shelf sediments from cores sampled during ODP leg 112 and several wide-diameter cores to be sampled during two future expeditions. Detailed chronostratigraphic analysis will be obtained by stable isotope analysis of benthonic foraminifera, bulk sediment dating and absolute dating interdispersed authigenic minerals and shell material. These data will allow the PIs to relate the formation and occurrence of phosphorize to environmental parameters over a time scale of hundreds to tens of thousands of years.