Halogens in altered ocean crust from the East Pacific Rise (ODP/IODP Hole 1256D)

摘要

The halogens (F, Cl, Br and I), H2O and CO2 were investigated in eighteen representative lavas, dykes and a gabbro spanning depths 750-1450 mbsf in the International Ocean Discovery Project (IODP) Hole 1256D. Whole rock analyses of halogens, H2O and CO2, and in situ F and Cl electron microprobe analyses were combined to provide new information about hydrothermal alteration of the ocean crust and the mineral controls on the abundances of all four halogens in altered ocean crust that is subducted into the mantle.