We are very grateful for the help of numerous ODP and TransOcean personnel during Leg 209 shipboard operations. We would particularly like to thank Mike Storms, Roy Davis, Paula Weiss, and Lisa Crowder from ODP and Wayne Malone, Pepe Estevez, Nick Parish, Phil Christie, and Dwight Mossman from TransOcean. Many scientists provided unpublished data without which Leg 209 would not have been possible. These include Henri Bougault, Peter Rona, Leonid Dmitriev, Sergei Silantiev, Mathilde Cannat, John Collins, Bob Detrick, members of the Woods Hole Oceanographic Institution/Japan Agency for Marine-Earth Science and Technology (WHOI/JAMSTEC) MODE 98 scientific party and their collaborators (especially Toshi Fujiwara, Mike Braun, and Jian Lin), and the scientific party of James Clark Ross Cruise JR63 (especially Chris MacLeod and Javier Escartín). Karen Hanghøj helped with ion microprobe analyses of rare earth elements in clinopyroxene. The WHOI Geochemistry Seminar, especially Greg Hirth, Stan Hart, and Nobu Shimizu, provided helpful criticism and advice. This research used samples and/or data provided by the Ocean Drilling Program (ODP). ODP is sponsored by the U.S. National Science Foundation and participating countries under management of Joint Oceanographic Institutions (JOI), Inc. In addition to research support from ODP, P.B. Kelemen was supported in this work in part by NSF research grants EAR-0538143, OCE-0426160, OCE-0405572, EAR-0409092, OCE-0327588, EAR-0337677, OCE-0242233, OCE-0137327, and OCE-0118572.