Results 21 to 30 of about 1,154,465 (152)

Automated Segmentation of Olivine Phenocrysts in a Volcanic Rock Thin Section Using a Fully Convolutional Neural Network

Frontiers in Earth Science, 2022
An example of automated characterization and interpretation of the textural and compositional characteristics of solids phases in thin sections using machine learning (ML) is presented.
Artem Leichter, Renat R. Almeev, Dennis Wittich, Philipp Beckmann, Franz Rottensteiner, Francois Holtz, Monika Sester   +6 more
doaj   +1 more source

Thermal Budgets of magma storage constrained by diffusion chronometry: the Cerro Galán ignimbrite

Journal of Petrology, 2022
The long-term thermochemical conditions at which large bodies of silicic magma are stored in the crust is integral to our understanding of the timing, frequency, and intensity of volcanic eruptions, and provides important context for interpreting volcano monitoring data.
Jordan Lubbers, Shan de Silva, Adam Kent
openaire   +2 more sources

Mush Amalgamation, Short Residence, and Sparse Detectability of Eruptible Magma Before Andean Super‐Eruptions

Geochemistry, Geophysics, Geosystems, 2023
Giant volcanic eruptions have the potential to overturn civilizations. Yet, the driving mechanism and timescale over which batholithic magma reservoirs transition from non‐eruptible crystal mush to mobile melt‐dominated stages and our capacity to detect ...
G. Weber, J. Blundy, D. Bevan
doaj   +1 more source

The dichotomous nature of Mg partitioning between plagioclase and melt: Implications for diffusion chronometry

Geochimica et Cosmochimica Acta, 2022
Compositional zoning in plagioclase feldspar is an important archive of the temporal, compositional and thermal evolution of magmatic systems. Modelling diffusion of Mg in plagioclase is commonly used to estimate the timescales of magmatic processes that operate weeks to decades before eruption.
Mutch, Euan JF, Maclennan, John, Madden-Nadeau, Amber L   +2 more
openaire   +1 more source

Numerical modelling of diffusion-limited mineral growth for geospeedometry applications [PDF]

Geoscientific Model Development
Diffusion and crystal growth are common processes in nature and can be observed in rocks that have experienced relatively high temperatures. Information about these processes is stored in the composition gradients of minerals.
A. Stroh, A. Stroh, P. S. Aellig, P. S. Aellig, E. Moulas, E. Moulas   +5 more
doaj   +1 more source

A NanoSIMS Investigation on Timescales Recorded in Volcanic Quartz From the Silicic Chon Aike Province (Patagonia)

Frontiers in Earth Science, 2018
Textural and chemical differences in coeval rhyolitic effusive and explosive eruptions are commonly observed, and numerical models predict different timescales for the eruption of crystal-rich mushes versus crystal-poor magmas. We compare quartz zonation
Susanne Seitz, Benita Putlitz, Lukas Baumgartner, Anders Meibom, Anders Meibom, Stéphane Escrig, Anne-Sophie Bouvier   +6 more
doaj   +1 more source

Timescales of magmatic processes at Ruapehu volcano from diffusion chronometry and their comparison to monitoring data [PDF]

Journal of Volcanology and Geothermal Research, 2014
Abstract Recent eruptions from Mt. Ruapehu have been difficult to predict, despite the presence of a multi-parametric monitoring network. As a result, it is necessary to assess precursory signals prior to an eruption and align those to magmatic processes at depth.
Kilgour, G. N., Saunders, K. E., Blundy, J. D., Cashman, K. V., Scott, B. J., Miller, C   +5 more
openaire   +2 more sources

Crystal Size Distribution (CSD) Analysis of Volcanic Samples: Advances and Challenges

Frontiers in Earth Science, 2020
Studies of magmatic systems have long used the textures of erupted samples to infer processes that control the location and duration of magma storage and drive volcanic eruptions from these storage regions.
Katharine V. Cashman
doaj   +1 more source

Petrogenetic implications of chromite-seeded boninite crystallization experiments: Providing a basis for chromite-melt diffusion chronometry in an oxybarometric context [PDF]

Geochimica et Cosmochimica Acta, 2021
Abstract Boninites are rare high magnesium andesites that often contain trace chromites. These chromites precipitate from primitive boninitic melts and are thought to be carried to the surface in melts that continue to crystallize a significant volume of silicate minerals.
Daniel A. Coulthard, Georg F. Zellmer, Akihiko Tomiya, Sébastien Jégo, Raimundo Brahm   +4 more
openaire   +3 more sources

The Christmas 2018 Eruption at Mount Etna: Enlightening How the Volcano Factory Works Through a Multiparametric Inspection

Geochemistry, Geophysics, Geosystems, 2020
The 24–27 December 2018 flank eruption at Mount Etna (Southern Italy) has been investigated through a multidisciplinary approach in which olivine chemical zoning and diffusion chronometry data were integrated with models inferred by GNSS (Global ...
Alfio Marco Borzi, Marisa Giuffrida, Francesco Zuccarello, Mimmo Palano, Marco Viccaro   +4 more
doaj   +1 more source