Chemistry of peridotites from ODP 109-670A, supplement to: Juteau, Thierry; Berger, Emmanuel; Cannat, Mathilde (1990): Serpentinized, residual mantle peridotites from the M.A.R. Median Valley, ODP Hole 670A (21°10'N, 45°02'W, Leg 109): primary mineralogy and geothermometry. In: Detrick, R; Honnorez, J; Bryan, WB; Juteau, T; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 106/109, 27-45

Thierry Juteau, Emmanuel Berger & Mathilde Cannat
During Leg 109 of the Ocean Drilling Program, about 100 m of serpentinized peridotites were drilled on the western wall of the M.A.R. axial rift valley, 45 km south of the Kane Fracture Zone. The present study reports petrological and mineralogical data obtained from 29 small pieces of these ultramafic rocks, including about 60% serpentinized harzburgites, 26% serpentinized lherzolites, 14% serpentinized dunites, and one sample of olivine websterite. Modal analyses show that all these rocks...
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