Building zoned ignimbrites by recycling silicic cumulates: insight from the 1,000 km3 Carpenter Ridge Tuff, CO

• Published in: Contributions to mineralogy and petrology Vol. 167; no. 6
• Main Authors: Bachmann, Olivier, Deering, Chad D., Lipman, Peter W., Plummer, Charles
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.06.2014
• Subjects: Earth and Environmental Science; Earth Sciences; Geology; Mineral Resources; Mineralogy; Original Paper; Zoned ignimbrite; Magmatism in the W USA; Magmatic differentiation; Gradients in magma chambers; Supervolcanoes

The ~1,000 km 3 Carpenter Ridge Tuff (CRT), erupted at 27.55 Ma during the mid-tertiary ignimbrite flare-up in the western USA, is among the largest known strongly zoned ash-flow tuffs. It consists primarily of densely welded crystal-poor rhyolite with a pronounced, highly evolved chemical signature...