The authors would like to thank the ODP technical staff and the crew of the JOIDES Resolution for their hard work during Leg 193. We are also grateful to Wolfgang Bach at Woods Hole Oceanographic Institute for conducting fluid analyses. The authors are grateful to Ray Binns, Stuart Barclay, and Richard Wordon for insightful comments that greatly improved this manuscript. This research used samples and data provided by the Ocean Drilling Program (ODP). ODP is sponsored by the U.S. National Science Foundation (NSF) and participating countries under the management of Joint Oceanographic Institutions (JOI), Inc. Funding for this research was provided by a grant from the U.S. Science Support Program, award numbers F001396 and F001344.