Figure 6. At left, a schematic cross section of the mantle section of the Oman ophiolite illustrates the relationships between residual mantle peridotites (gray), dunites (red), and dikes (black). Light lines show the trend of deformation features ("foliation") in peridotite, which are sub-parallel to the paleo-seafloor. At right, constraints from the mantle sections of ophiolites, and theoretical studies of reactive porous flow of melt through partially soluble rocks, can be used to infer that melt extraction beneath mid-ocean ridges occurs in a coalescing network of porous dunite channels.[back]
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