ACKNOWLEDGMENTS

We would like to thank Berhard Schnetger (Institut für Chemie und Biologie des Meeres, Oldenburg) for analytical advice and the Scientific Party of ODP Leg 184 for their generous support and many stimulating discussions. Tracy D. Frank and an anonymous reviewer are thanked for helpful comments and suggestions. This research used samples and/or data provided by the Ocean Drilling Program (ODP). ODP is sponsored by the U.S. National Science Foundation (NSF) and participating countries under management of Joint Oceanographic Institutions (JOI), Inc. Funding for this research was provided by the Deutsche Forschungsgemeinschaft (DFG) (grant no. BR 775/11).

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