Results 51 to 60 of about 865,890 (160)

Rare Earth Element Potential in the Araí Rift Metavolcanic, Central Brazil: Gamma‐Ray Signatures, Mineralogy and Exploration Implications

Terra Nova, EarlyView.
ABSTRACT Although central Brazil hosts significant ion‐adsorption rare earth element (REE) deposits associated with A‐type granites, their coeval volcanic counterparts have been largely overlooked as exploration targets. This study demonstrates that acidic metavolcanic rocks of the Araí Group share strong radiometric, geochemical and mineralogical ...
Yuri Ribeiro, Nilson Francisquini Botelho, Valmir da Silva Souza, Diego Guilherme da Costa Gomes   +3 more
wiley   +1 more source

The impact of volcanic eruption rate on pyroclastic hazard

Communications Earth & Environment
Pyroclastic density currents – fast flows of hot gases, ash, and debris – are some of the most hazardous phenomena associated with explosive volcanic eruptions.
Domenico M. Doronzo
doaj   +1 more source

IMEX_SfloW2D 1.0: a depth-averaged numerical flow model for pyroclastic avalanches [PDF]

Geoscientific Model Development, 2019
Pyroclastic avalanches are a type of granular flow generated at active volcanoes by different mechanisms, including the collapse of steep pyroclastic deposits (e.g., scoria and ash cones), fountaining during moderately explosive eruptions, and crumbling ...
M. de' Michieli Vitturi, T. Esposti Ongaro, G. Lari, A. Aravena   +3 more
doaj   +1 more source

“Antarctic on fire”: Paleo-wildfire events associated with volcanic deposits in the Antarctic Peninsula during the Late Cretaceous

Frontiers in Earth Science, 2023
The occurrence of paleo-wildfire events during the Campanian age of the Late Cretaceous is demonstrated in this study for the first time with deposits from the King George Island, South Shetland Islands, Antarctic Peninsula.
Joseline Manfroi, Joseline Manfroi, Joseline Manfroi, Cristine Trevisan, Tânia Lindner Dutra, André Jasper, Marcelo De Araujo Carvalho, Francisco Eliseu Aquino, Marcelo Leppe   +8 more
doaj   +1 more source

Finite element formulation for compressible multiphase flows and its application to pyroclastic gravity currents [PDF]

, 2022
The numerical modeling of compressible multiphase flows is of high interest for several engineering applications. In this work, we focus on the study of pyroclastic flows arising from volcanic eruptive events.
Montanino, Andrea, Rossi, Riccardo, Franci, Alessandro, Zuccaro, Giulio, Giulio Zuccaro, Andrea Montanino, Riccardo Rossi, Alessandro Franci   +7 more
core   +1 more source

Floristic Composition of Groundcover Vegetation after the 2010 Pyroclastic Fire on Mount Merapi

Jurnal Manajemen Hutan Tropika, 2013
Mount Merapi with its Merapi-type pyroclastic flows provides burnt and unburnt areas which are excellent to study establishment events of pioneer plant species. Using site comparison approach, floristic composition was studied, and thus an area that was
Sutomo Sutomo, Dini Fardila
doaj   +3 more sources

The impact of pyroclastic density currents duration on humans: the case of the AD 79 eruption of Vesuvius

Scientific Reports, 2021
Pyroclastic density currents are ground hugging gas-particle flows that originate from the collapse of an eruption column or lava dome. They move away from the volcano at high speed, causing devastation.
Pierfrancesco Dellino, Fabio Dioguardi, Roberto Isaia, Roberto Sulpizio, Daniela Mele   +4 more
doaj   +1 more source

Geotechnical Properties of Two Pyroclastic Deposits Involved in Catastrophic Flowslides for Implementation in Early Warning Systems

Geosciences, 2018
Air-fall pyroclastic deposits on steep slopes in Campania (Southern Italy) are periodically subjected to rainfall-induced landslides that may evolve into catastrophic flowslides.
Lucio Olivares, Emilia Damiano, Nadia Netti, Martina de Cristofaro   +3 more
doaj   +1 more source

Post-eruptive flooding of Santorini caldera and implications for tsunami generation

Nature Communications, 2016
The Bronze Age eruption of Santorini is known to have generated tsunamis with caldera collapse as the likely mechanism. However, new bathymetric and seismic data presented by Nomikou et al.
P. Nomikou, T. H. Druitt, C. Hübscher, T. A. Mather, M. Paulatto, L. M. Kalnins, K. Kelfoun, D. Papanikolaou, K. Bejelou, D. Lampridou, D. M. Pyle, S. Carey, A. B. Watts, B. Weiß, M. M. Parks   +14 more
doaj   +1 more source

Numerical simulation of pyroclastic density currents on Campi Flegrei topography: a tool for statistical hazard estimation.

, 2004
We describe a numerical simulation of both concentrated and dilute gravity-driven pyroclastic flows on a digital topographic model of the Campi Flegrei volcanic field.
Rossano, S., Mastrolorenzo, G., De Natale, G.   +2 more
core   +1 more source