We would like to thank the crew and scientific party of Leg 207 for their kind support. 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. Lorri Peters of the Integrated Ocean Drilling Program edited the text in detail. Pat Wilde and Tim Lyons are thanked for their constructive reviews of the manuscript. This study was funded by Deutsche Forschungsgemeinschaft (grants BR 775/16, BR 775/17 and BO 1584/2) and Max Planck Society, Germany.