Calcium carbonate content and concentration of phosphorus components in sediments of ODP Leg 171B sites

Quantifying phosphorus (P) concentrations in marine sediments is necessary for constraining the oceanic record of phosphorus burial and helps to constrain P sedimentary geochemistry. To understand P geochemistry in the sediments, we must determine the geochemical forms of P as well as the transformations occurring between these P components with depth and age. Although several records now exist of P geochemistry in the western and eastern equatorial Pacific (Filippelli and Delaney, 1995, doi:10.2973/odp.proc.sr.138.144.1995; 1996, doi:10.1016/0016-7037(96)00042-7), the western equatorial Atlantic (Delaney and Anderson, 1997, doi:10.2973/odp.proc.sr.154.124.1997), the California Current (Delaney and Anderson, in press), and the Benguela Current (Anderson et al., 2001, doi:10.1029/2000GB001270), most of these are Neogene records. Relatively little data exist from sediments of the Paleogene or Cretaceous, time periods when carbon isotope records indicate major carbon shifts and when the nature of P geochemistry has not been well constrained. Samples from several sites at various water depths, oceanographic regions, and ages are needed to understand how P geochemistry and burial in sediments reflect ocean history. […]定量测定海洋沉积物中的磷（P）浓度，是约束磷埋藏海洋记录、明确磷沉积地球化学过程的必要前提。为阐明沉积物中的磷地球化学特征，需明确磷的地球化学赋存形态，以及不同赋存形态的磷组分随沉积深度与年代发生的转化作用。尽管目前已有西赤道太平洋、东赤道太平洋（Filippelli与Delaney，1995，doi:10.2973/odp.proc.sr.138.144.1995；1996，doi:10.1016/0016-7037(96)00042-7）、西赤道大西洋（Delaney与Anderson，1997，doi:10.2973/odp.proc.sr.154.124.1997）、加利福尼亚海流（Delaney与Anderson，待刊）以及本格拉海流（Anderson等，2001，doi:10.1029/2000GB001270）的磷地球化学相关记录，但其中绝大多数均为新近纪（Neogene）时期的记录。古近纪（Paleogene）与白垩纪（Cretaceous）时期的沉积物磷地球化学数据则相对匮乏；而在这两个地质时期，碳同位素记录显示曾发生重大碳循环扰动，且磷地球化学的本质特征尚未得到明确约束。为阐明沉积物中磷地球化学特征与埋藏过程如何反映海洋演化历史，需采集不同水深、不同海洋学区域以及不同沉积年代的多个站位样品。……