Compositional analyses of peridotites/basalts: using the facilities of the plasma mass spectrometry laboratory a student would analyze samples for their chemical and or isotopic compositions. Bulk solution analyses, in-situ, spatially resolved analyses, or both can be carried out; the choice will be dictated by the hypothesis to be tested. A number of specific experiments are on offer, including but not limited to (1) compositional analyses of sulfides in basalts and peridotites, (2) analyses of olivines from the Archean, Proterozoic and Phanerozoic, and (3) Li isotopic studies of recent basalts or minerals from peridotites. Students are encouraged to contact Bill McDonough for further info.