Testing for Rapid Thermal Pulses in the Crust by Modeling Garnet Growth–Diffusion–Resorption Profiles in a UHT Metamorphic ‘Hot Spot’, New Hampshire, USA

A series of localized high-temperature granulite-facies domains (‘hot spots’) are present within the regional (10–100 km2 scale) amphibolite-facies rocks of the Central Maine Terrane in central New Hampshire (NH), USA. Based on the spatial coincidence of a thermal anomaly and contours of depressed δ18O values centered on networks of quartz–graphite and pegmatitic veins in the vicinity of Bristol, NH, it was proposed in an earlier study that...