Dehydration Melting at the Top of the Lower MantleBrandon Schmandt1 , Steven D. Jacobsen2 , Thorsten W. Becker3 , Zhenxian Liu4 , Kenneth G. Dueker5 1 Department of Earth and Planetary Science, University of New Mexico, Albuquerque, NM, USA. 2 Department of Earth and Planetary Sciences, Northwestern University, Evanston, IL, USA. 3 Department of Earth Sciences, University of Southern California, Los Angeles, CA, USA. 4 Geophysical Laboratory, Carnegie Institution of Washington, Washington DC, USA.