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

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 b...

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Bibliographic Details
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
Description
Summary: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). ...

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