2015
DOI: 10.1007/s00445-015-0925-z
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Cristobalite in the 2011–2012 Cordón Caulle eruption (Chile)

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Cited by 47 publications
(87 citation statements)
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“…Using an eruptive temperature of 900 • C, a melt composition from Schipper et al (2015) with a volatile content of 0.1%, and an initial crystal content of ∼30% at the vent (Schipper et al, 2015) gives a viscosity of ∼1.5 × 10 9 Pa s. This is in close agreement to the fixed parameter model suggested here (Equations 1, 2, Figure 10A). We acknowledge that the Einstein-Roscoe equation is based on the assumption that the crystal population is isotropic.…”
Section: Inferring Cordón Caulle Flow Propertiessupporting
confidence: 75%
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“…Using an eruptive temperature of 900 • C, a melt composition from Schipper et al (2015) with a volatile content of 0.1%, and an initial crystal content of ∼30% at the vent (Schipper et al, 2015) gives a viscosity of ∼1.5 × 10 9 Pa s. This is in close agreement to the fixed parameter model suggested here (Equations 1, 2, Figure 10A). We acknowledge that the Einstein-Roscoe equation is based on the assumption that the crystal population is isotropic.…”
Section: Inferring Cordón Caulle Flow Propertiessupporting
confidence: 75%
“…However, reliable viscosity estimates could only be made from the latter stages of the eruption when recognizable surface features could be tracked and the flow was less obscured by the eruption plume. Thus, viscosity estimates are upper bounds because they are likely to be affected by the presence of a crust, and the later lava was likely cooler, more degassed and more crystalline than during the earlier stages (Schipper et al, 2015). Flow length models offer an alternative approach to constrain plausible values of flow viscosity, crust yield strength and internal yield strength.…”
Section: Inferring Cordón Caulle Flow Propertiesmentioning
confidence: 99%
“…%). These SiO 2 -enriched bands correspond with fractured areas associated with greater crystallinity and porosity, as encountered in the 2011-2012 Cordón Caulle rhyolite lava (Schipper et al, 2015). Other major elements are also heterogeneous in banded clasts, e.g., 6.2-23.2 wt.…”
Section: Major Element Compositionsmentioning
confidence: 99%
“…Silica-enriched portions of banded clasts are interpreted as zones of local cristobalite precipitation within lava, potentially from an earlier eruptive episode. Banding in these lava clasts probably results from shear deformation (Schipper et al, 2015). The inferred depth of magma excavation in the vein (≥360 m) likely exceeded the dome height during phase 2, as it only attained 350 m on 30/09/2008, well after Vulcanian activity ceased (Global Volcanism Program, 2008;Bernstein et al, 2013).…”
Section: Vesicle Size Distributionsmentioning
confidence: 99%
“…In addition, prolonged residence times of the tuffisite hosting lava during outgassing are supported by the presence of cristobalite needles in some tuffisites ( Figure 4H). The presence of cristobalite only in tuffisites and not in the host lavas suggests it is likely to be a product of vapor phase deposition (Horwell et al, 2013), though it can also relate to the devitrification of glass (e.g., Schipper et al, 2015).…”
Section: Geological Observations and Measurementsmentioning
confidence: 99%