40Ar/39Ar geochronology of magmatic-steam alunite from Alunite Ridge and Deer Trail Mountain, Marysvale Volcanic Field, Utah: Timing and duration of miocene hydrothermal activity associated with concealed intrusions - Mercer, Cameron; Cosca, M.; Hofstra, Albert; Premo, Wayne; Rye, Robert; Landis, Gary (Minerals, 2022)