Mineralogy and structural specification of ODP Leg 125 peridotite samples, supplement to: Girardeau, Jacques; Lagabrielle, Yves (1992): Deformation history of peridotites from Mariana Forearc, conical seamount, Leg 125. In: Fryer, P; Pearce, JA; Stokking, LB; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 125, 519-532

Jacques Girardeau & Yves Lagabrielle
Abundant serpentinite seamounts are found along the outer high of the Mariana forearc at the top of the inner slope of the trench. One of them, Conical Seamount, was drilled at Sites 778, 779, and 780 during Leg 125.The rocks recovered at Holes 779A and 780C, respectively, on the flanks and at the summit of the seamount, include moderately serpentinized depleted harzburgites and some dunites. These rocks exhibit evidence of resorption of the orthopyroxene, when...
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