gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1998.62A.3.74 Spatial and Temporal Variations in Mid-Ocean Ridge Basalt Geochemistry Along the 9°–10°N East Pacific Rise Sims K. W. W. Fornari D. J. Hart S. R. Dept. of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole MA 02543, USA Goldstein S. J. Murrell M. T. Chemical Science and Technology Div., Los Alamos National Laboratory, Los Alamos, NM 87545, USA Perfit M. R. Dept. of Geology, University of Florida, Gainesville, FL 32611, USA 1998 62A 3 1413 1414 Copyright © 1998, The Mineralogical Society 1998