SIMS Constraints on the Near-Eruption Crystallization of Accessory Minerals from Intracontinental Rhyolites of the Western United States

Jorge A Vazquez1, Mark E Stelten2, Naomi Elizabeth Matthews3, Mae Marcaida2, Heather Michelle Nicholson Wright4 and Andrew T Calvert2, (1)U.S. Geological Survey, Menlo Park, United States, (2)USGS, Menlo Park, CA, United States, (3)Universitetet i Stavanger, Department of Petroleum Engineering, Stavanger, Norway, (4)USGS Cascades Volcano Observatory, Vancouver, WA, United States