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Experiments on natural materials

Experiments on natural materials allow for investigation of a range of processes with the full complexity of magmatic materials. Small-scale experiments can reproduce some of the textural evolution of vesiculating and deforming magmas and lavas. Because the solubility of water (the primary magmatic volatile in high-silica melts) decreases with both decompression and heating, we can replicate bubble expansion which might normally occur due to decompression by heating natural samples well above their eruption temperatures. We can study both the temporal evolution of these samples as well as their post-experimental charactersitics. 

Shear-induced outgassing

Vesiculation in cylindrical geometries forces expansion to occur anisotropically, promoting bubble deformation, connectivity, and outgassing. Due to the complex feedbacks between shear, bubble shape, connectivity, and bubble pressure, deformation in bubbly suspensions results in localized shear and bubble collapse. This introduces a scale-dependence to bubble texture evolution which I investigate using a variety of sample sizes between 10 and 175 mm.
https://doi.org/10.48550/arXiv.2505.10103
 

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