Major oxide and trace element determinations of the composition basalts from the bottom of Hole 487, together with microprobe analyses of their minerals (olivine, magnesiochromite, salite, and plagioclase), prove that they are depleted oceanic tholeiites.
Supplement to: Joron, Jean Louis; Bougault, Henri; Maury, R C; Stephan, J F (1982): Basalt from the Cocos Plate, Site 487, Leg 66: Petrology and geochemistry. In: Watkins, JS; Casey Moore, J; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 66, 731-734