The effect of pressurized magma chamber growth on melt migration and pre-caldera vent locations through time at Mount Mazama, Crater Lake, Oregon
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Oxygen isotope study of the Long Valley magma system, California: isotope thermometry and convection in large silicic magma bodies
Products of voluminous pyroclastic eruptions with eruptive draw-down of several kilometers provide a snap-shot view of batholith-scale magma chambers, and quench pre-eruptive isotopic fractionations (i.e., temperatures) between minerals. We report analyses of oxygen isotope ratio in individual quartz phenocrysts and concentrates of magnetite, pyroxene, and zircon from individual pumice clasts o...
متن کاملMorphology, volcanism, and mass wasting in Crater Lake, Oregon
Crater Lake was surveyed nearly to its shoreline by high-resolution multibeam echo sounding in order to define its geologic history and provide an accurate base map for research and monitoring surveys. The bathymetry and acoustic backscatter reveal the character of landforms and lead to a chronology for the concurrent filling of the lake and volcanism within the ca. 7700 calibrated yr B.P. cald...
متن کاملPorewater and Hydrothermal Vent Water Inputs to Yellowstone Lake, Wyoming
Geochemical inputs to Yellowstone Lake, Wyoming, come from a variety of sources, including hydrothermal vents, groundwater, rainwater, flux from sediments, and direct runoff. One-third of Yellowstone Lake is directly influenced by hydrothermal activity (hot-water vents and fumaroles). Geothermally heated water percolating through the chamber is highly enriched with carbonate, silicate, chloride...
متن کاملInflation model of Uzon caldera, Kamchatka, constrained by satellite radar interferometry observations
[1] We analyzed RADARSAT-1 synthetic aperture radar (SAR) data to compute interferometric SAR (InSAR) images of surface deformation at Uzon caldera, Kamchatka, Russia. From 2000 to 2003 approximately 0.15 m of inflation occurred at Uzon caldera, extending beneath adjacent Kikhpinych volcano. This contrasts with InSAR data showing no significant deformation during either the 1999 to 2000, or 200...
متن کاملCaldera size modulated by the yield stress within a crystal-rich magma reservoir
The largest volcanic eruptions in the geologic record have no analogue in the historical record. These eruptions had global impacts1,2, but are known only through their eruptive products. They have left behind calderas that formed as the surface collapsed when eruption evacuated magma chambers at 5–15 km depths3,4. It is generally assumed that calderas reflect the spatial dimensions of underlyi...
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تاریخ انتشار 2015