Geochronology
The geochronometer used in this study is 40Ar/39Ar geochronology, however SHRIMP U/Pb geochronology has been done in the adjacent Ladakh Batholith (White et al. 2011 cf Wu et al. 2007) and is referred to here to correlate ages of the igneous bodies in the region so as to verify the possible source of the pebble analysed using 40Ar/39Ar geochronology. 40Ar/39Ar geochronology has been used to analyse this pebble due to the versatility of the chronometer. Ages may be obtained from preserved original igneous grains or relict populations, as well as metamorphic grains from younger heating events where cooling ages may be preserved. In addition, information from grains that have been deformed and/or recrystallised in younger events may also be preserved. Relict igneous events can then be correlated with U/Pb SHRIMP ages, metamorphic and recrystallisation can be correlated to the microstructural and micro-chemical results.