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Your search keyword '"Ortenzi, Gianluigi"' showing total 4 results
Start Over Author "Ortenzi, Gianluigi" Topic planetenphysik
4 results on '"Ortenzi, Gianluigi"'

1. Multi-spectral analyses (LIBS, Raman and VIS/NIR) of planetary analogue materials on volcanic deposits (Vulcano Island, Italy)

Author

Stephan, Katrin, Schröder, Susanne, Baqué, Mickael, Rammelkamp, Kristin, Gwinner, Klaus, Haber, J., Varatharajan, Indhu, Ortenzi, Gianluigi, Pisello, Alessandro, Sohl, Frank, Jaumann, R, Parekh, Rutu Ashwin, Thomsen, Laurenz, and Unnithan, V.

Subjects
Planetengeologie, Planetenphysik, Vulcano Geologie Mineralogie Spektroskopie, Planetengeodäsie, Planetare Labore, Terahertz- und Laserspektroskopie
Published
2020

2. Multi-Spectral Investigation of Planetary Analog Material in Extreme Environments - Alteration Products of Volcanic Deposits of Vulcano/Italy

Author

Stephan, Katrin, Schröder, Stefan, Rammelkamp, Kristin, Gwinner, Klaus, Haber, James, Varatharajan, Indhu, Ortenzi, Gianluigi, Pisello, Alessandro, Sohl, Frank, Jaumann, R., Thomsen, L., and Unnithan, V.

Subjects
Planetengeologie, spectroscopy, volcanism, field study, Planetenphysik, Planetengeodäsie, Vulcano Spektroskopie Mars, Planetare Labore, Terahertz- und Laserspektroskopie, analogues, Institut für Optische Sensorsysteme
Published
2020

4. Enhancement of eruption explosivity by heterogeneous bubble nucleation triggered by magma mingling

Author

Joali Paredes-Mariño, Kathrin Laeger, Adriano Pimentel, Ulrich Kueppers, Gianluigi Ortenzi, Massimiliano Porreca, Maurizio Petrelli, Diego Perugini, Katherine J. Dobson, Kai-Uwe Hess, Daniele Morgavi, PAREDES MARINO, DILCAR JOALI, Dobson, Katherine J., Ortenzi, Gianluigi, Kueppers, Ulrich, Morgavi, Daniele, Petrelli, Maurizio, Hess, Kai-Uwe, Laeger, Kathrin, Porreca, Massimiliano, Pimentel, Adriano, and Perugini, Diego

Subjects
010504 meteorology & atmospheric sciences, Trachyte, lcsh:Medicine, Volcanic explosivity index, fractal analysis, 010502 geochemistry & geophysics, 01 natural sciences, Article, hazard assessment, Planetenphysik, fragmentation, QE, Petrology, lcsh:Science, 0105 earth and related environmental sciences, bubble nucleation, geography, Multidisciplinary, Explosive eruption, Vulcanian eruption, geography.geographical_feature_category, lcsh:R, Bubble nucleation, hazard assessment, fractal analysis, volcanic products, volcanic eruptions, fractal analysi, Volcano, magma interaction, Magma, TA170, lcsh:Q, Mafic, volcanic products, Geology
Abstract

We present new evidence that shows magma mingling can be a key process during highly explosive eruptions. Using fractal analysis of the size distribution of trachybasaltic fragments found on the inner walls of bubbles in trachytic pumices, we show that the more mafic component underwent fracturing during quenching against the trachyte. We propose a new mechanism for how this magmatic interaction at depth triggered rapid heterogeneous bubble nucleation and growth and could have enhanced eruption explosivity. We argue that the data support a further, and hitherto unreported contribution of magma mingling to highly explosive eruptions. This has implications for hazard assessment for those volcanoes in which evidence of magma mingling exists.

Published
2017

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