Chemistry of minerals of ODP Hole 103-637A peridotites, supplement to: Kimball, Karen L; Evans, Cynthia A (1988): Hydrothermal alteration of peridotite from the Galicia margin, Iberian Peninsula. In: Boillot, G; Winterer, EL; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 103, 241-251

Karen L Kimball & Cynthia A Evans
The Galicia margin lies northwest of the Iberian Peninsula and is a passive ocean margin with thin sedimentary cover. Altered peridotite was recovered from ODP Site 637, on the north-trending ridge at the western edge of the margin, near the oceanic/continental crust boundary.The altered ultramafics were originally clinopyroxene-rich upper mantle harzburgites and are now extensively serpentinized (>85%) and cut by very late-stage carbonate veins. Despite pervasive late, low-temperature alteration, evidence of early, high-temperature alteration remains....
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