Geochemistry and petrology of ODP Leg 121 basalts, supplement to: Frey, Frederick A; Jones, William B; Davies, Hugh L; Weis, Dominique A M (1991): Geochemical and petrologic data for basalts from Sites 756, 757, and 758: implications for the origin and evolution of the Ninetyeast Ridge. In: Weissel, J; Peirce, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 121, 611-659

Frederick A Frey, William B Jones, Hugh L Davies & Dominique A M Weis
Basement lavas from Sites 756, 757, and 758 on Ninetyeast Ridge are tholeiitic basalts. Lavas from Sites 756 and 757 appear to be subaerial eruptives, but the lowermost flows from Hole 758A are pillow lavas. In contrast to the compositional variation during the waning stages of Hawaiian volcanism, no alkalic lavas have been recovered from Ninetyeast Ridge and highly evolved lavas were recovered from only one of seven drill sites (DSDP Site 214). All lavas...
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