The genesis of arc dacites: the case of Mount St. Helens, WA

• Published in: Contributions to mineralogy and petrology Vol. 174; no. 1; pp. 1 - 14
• Main Authors: Wanke, Maren, Karakas, Ozge, Bachmann, Olivier
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.01.2019; Springer; Springer Nature B.V
• Subjects: Andesite; Ascent; Assimilation; Composition; Crystallization; Differentiation; Earth and Environmental Science; Earth Sciences; Fractional crystallization; Geology; Geophysics; Imaging techniques; Interdisciplinary studies; Lava; Magma; Mineral Resources; Mineralogy; Modelling; Organic chemistry; Original Paper; Petrology; Reservoirs; Volcanoes; Lower crustal mush; Amphibole; AFC processes; Mount St. Helens; Dacites; Thermal model

Throughout the last 35 ka, Mount St. Helens has been the most active volcano in the Cascade arc, but the origin of its voluminous dacites remains controversial. These dacites were traditionally interpreted as a result of melting metabasaltic lower crust. Yet, recent studies have challenged this view...