Extractions and analyses of reactive phosphorus in the Bering Sea from IODP Holes 323-U1341A and 323-U1341B ...

• Main Authors: März, Christian, Poulton, Simon W, Wagner, Thomas, Schnetger, Bernhard, Brumsack, Hans-Jürgen
• Format: Dataset
• Language: English
• Published: PANGAEA 2016
• Subjects: Event label; Sample code/label; Sample ID; DEPTH, sediment/rock; Silicon dioxide; Aluminium oxide; Silicon excess; Phosphorus; Phosphorus excess; Residual; Ratio; Accumulation rate, phosphorus, reactive; Drilling/drill rig; DSDP/ODP/IODP sample designation; X-ray fluorescence spectrometer Philips PW2400; Calculated; Exp323; Joides Resolution; Integrated Ocean Drilling Program / International Ocean Discovery Program IODP; Bering Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.857261; https://doi.pangaea.de/10.1594/PANGAEA.857261

To reconstruct the cycling of reactive phosphorus (P) in the Bering Sea, a P speciation record covering the last ~ 4 Ma was generated from sediments recovered during Integrated Ocean Drilling Program (IODP) Expedition 323 at Site U1341 (Bowers Ridge). A chemical extraction procedure distinguishing between different operationally defined P fractions provides new insight into reactive P input, burial and diagenetic transformations. Reactive P mass accumulation rates (MARs) are ~ 20-110 µmol/cm2/ka, which is comparable to other open ocean locations but orders of magnitude lower than most upwelling settings. We find that authigenic carbonate fluorapatite (CFA) and opal-bound P are the dominant P fractions at Site U1341. An overall increasing contribution of CFA to total P with sediment depth is consistent with a gradual "sink switching" from more labile P fractions (fish remains, Fe oxides, organic matter) to stable authigenic CFA. However, the positive correlation of CFA with Al content implies that a ... : Extraction steps according to Ruttenberg (1992; doi:10.4319/lo.1992.37.7.1460), Schenau and De Lange (2000; doi:10.1016/S0304-4203(01)00037-8) and Latimer et al. (2006; doi:10.1016/j.gca.2006.04.033). ...