Isotopic measurement of Sr and O exchange between meteoric-hydrothermal fluid and the Coire Uaigneich Granophyre, Isle of Skye, N.W. Scotland

To determine the scale and magnitude of hydrothermal Sr contamination in an 18O-depleted granite from the Isle of Skye, Sr and O isotopic and electron microprobe mineral analyses were performed on samples of Coire Uaigneich Granophyre (CUG), including two samples cut by mineralised fractures. Unfractured whole-rock samples have model initial 87Sr/86Sr ratios between 0.7298 and 0.7320 and δ18O values within 2% of SMOW. Depletions in18O are most …