This research used samples and/or data provided by the Ocean Drilling Program (ODP). ODP was 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 U.S. Science Support Program. We acknowledge the help of the Leg 204 Science Party and the ODP technical staff in carrying out the Leg 204 geochemistry program. We thank Amane Waseda and an anonymous reviewer for constructive suggestions.