Geochemistry of the gabbroic lithosphere in IODP Holes 304-U1309D and 305-U1309D, supplement to: Drouin, Marion; Godard, Marguerite; Ildefonse, Benoit; Bruguier, Olivier; Garrido, Carlos J (2009): Geochemical and petrographic evidence for magmatic impregnation in the oceanic lithosphere at Atlantis Massif, Mid-Atlantic Ridge (IODP Hole U1309D, 30°N). Chemical Geology, 264(1-4), 71-88

Marion Drouin, Marguerite Godard, Benoit Ildefonse, Olivier Bruguier & Carlos J Garrido
IODP Hole U1309D (Atlantis Massif, Mid-Atlantic Ridge 30°N) is the second deepest hole drilled into slow spread gabbroic lithosphere. It comprises 5.4% of olivine-rich troctolites (~ > 70% olivine), possibly the most primitive gabbroic rocks ever drilled at mid-ocean ridges. We present the result of an in situ trace element study carried out on a series of olivine-rich troctolites, and neighbouring troctolites and gabbros, from olivine-rich intervals in Hole U1309D. Olivine-rich troctolites display poikilitic textures;...
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