WEBINAR - Brandon Browne
Not-So-Simple Cinder Cone Plumbing Systems: Examples From the Sierra Nevada
Brandon Browne
Department of Geological Sciences
California State University Fullerton
Cinder cones situated in continental monogenetic volcanic fields are generally thought to erupt single magma batches over short periods of time. However, field mapping efforts combined with petrologic, geochemical, and thermobarometric analysis of erupted products from two unrelated volcanic fields in California (Red Cones, 5 km SW of Mammoth Mountain; and Golden Trout, 5 km SW of Mt Whitney) indicate pronounced differences in the eruption volumes and Pressure-Temperature crystallization histories of erupted basalts despite overall similarities in magma source. These findings suggest that magma plumbing systems and the mechanisms for magma supply at cinder cones are actually quite complex, and therefore require us to modify our perspectives on how they from as well as the types of geophysical signals they potentially yield before, during, and after eruptions.
2 comments:
Interesting research. Please continue. It seems you've just started 'pulling on the string'. Just scratching the surface toward a deeper understanding of cinder cones etc in the Sierras - and the deserts of Calif. David Edick Jr. SDSU Alumnus
Intriguing. Are there many cinder cones located in California? It's too bad that all things in life can't be straightforward, but if that were so then science wouldn't have fun new puzzles to solve such as this one.
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