Relative elemental mobility during hydrothermal alteration of a basic sill, Isle of Skye, N.W. Scotland

In Sconser quarry, Isle of Skye, a thin Tertiary basic sill is cut by vertical veins which formed fluid conduits in a major meteoric-hydrothermal system. In order to study the relative mobility of different elements during hydrothermal metamorphism, sill material adjacent to a large (6 mm wide) vein was cut into slices and subjected to geochemical and isotopic analysis.Isotopic evidence indicates that the basic magma which formed the sill was …