Article
Geochemistry & Geophysics
G. Boudoire, G. Pasdeloup, F. Schiavi, N. Cluzel, V. Rafflin, F. Grassa, G. Giuffrida, M. Liuzzo, A. Harris, D. Laporte, A. L. Rizzo
Summary: Developing monitoring strategies in long-quiescent volcanic provinces is challenging due to the lack of recordable signals and experienced eruptive phenomenology. This study in the Massif Central (France) focuses on the Pavin's Group of Volcanoes and proposes an innovative approach to understand the gas evolution in the magmatic system. By analyzing fluid inclusions, the study reveals insights into magma degassing, magma differentiation, and the origin of gas emissions in the region.
Article
Geology
J. Hickey, K. Pascal, M. Head, J. Gottsmann, N. Fournier, S. Hreinsdottir, R. Syers
Summary: This study shows that analysis of surface deformation can help define volcanic repose and eruptive episodes. The continuous magma pressurization observed at Soufriere Hills volcano, despite the absence of recent eruptions, highlights the need for vigilant monitoring and management of the volcano and its surroundings.
Review
Astronomy & Astrophysics
Marie Edmonds, Emily Mason, Olivia Hogg
Summary: Volcanoes play a significant role in the cycling of volatile metals on Earth, releasing them into the environment in reactive forms. The compositional differences of volcanic plumes are controlled by magma and fluid chemistry. Volcanic metals can be deposited near the vent or transported and deposited in dry environments.
ANNUAL REVIEW OF EARTH AND PLANETARY SCIENCES
(2022)
Article
Geochemistry & Geophysics
Olivia R. Hogg, Marie Edmonds, Jon Blundy
Summary: Magmatic-hydrothermal fluids play a role in transporting chalcophile metals to the atmosphere and the formation of ore deposits. Variability in the composition of metals outgassed by volcanoes is observed, but the factors controlling this variability are unclear. Our models show that while chlorine concentrations are important for metal partitioning, magmatic water contents have the greatest potential to control the mass yield of metals carried by exsolving fluids. We demonstrate that water-rich magmatic-volcanic systems deliver larger mass fluxes of metals to the atmosphere compared to relatively dry systems.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Rebecca Scholtysik, Dante Canil
Summary: The study investigated the sublimation of volatile trace metals during volcanic activity, revealing that temperature plays a dominant role in metal sublimation, while chlorine significantly influences the transport of Rb, Cs, and Ag. The effect of fO(2) is observed for some metals under specific conditions, determining their sublimation host. The transportation of different metals in volcanic systems depends on temperature and oxygen fugacity.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Editorial Material
Geosciences, Multidisciplinary
Gianmarco Buono, Sara Fanara, Giovanni Macedonio, Danilo M. Palladino, Paola Petrosino, Gianluca Sottili, Lucia Pappalardo
Summary: The original paper explored degassing dynamics of alkaline melts with various compositions under different conditions. The critics questioned the classical nucleation theory without providing new evidence, only relying on subjective conjectures.
EARTH-SCIENCE REVIEWS
(2021)
Article
Geochemistry & Geophysics
Edgardo Canon-Tapia, Rocio A. Jacobo-Bojorquez
Summary: The surface distribution of volcanic vents in the lunar region of Marius Hills provides important information about the magmatic structure beneath. The results confirm the presence of magma accumulation zones and reveal the detailed structure of the plumbing system. The joint interpretation of gravity, topography, and vent distribution analysis suggests similarities to other terrestrial large shields.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2022)
Article
Geochemistry & Geophysics
Cesar Andrade, Fatima Viveiros, J. Virgilio Cruz, Rui Coutinho
Summary: The Azores archipelago in Portugal contains 88 lakes, with most of the CO2 emissions into the atmosphere originating from volcanic and hydrothermal sources in the lakes. Approximately 42% of the total degassing comes from deep-seated CO2. The lakes emit around 171 x 10(3) tonnes of CO2 annually, with specific lakes like Furnas and Furna do Enxofre showing mantle-derived CO2 origin.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2021)
Article
Geosciences, Multidisciplinary
Holly E. Unwin, Hugh Tuffen, Emrys Phillips, Fabian B. Wadsworth, Mike R. James
Summary: The study characterizes the processes, pressures, and timescales involved in tuffisite evolution within the country rock by analyzing the sedimentary facies and structures of a large sub-horizontal tuffisite vein at Husafell volcano in western Iceland. It reveals that each sedimentary unit requires fluid overpressures of approximately 1.9-3.3 MPa to be emplaced, and tuffisites may represent the fossil record of low-frequency seismic swarms associated with fracture propagation and reactivation, providing new insights into volcanic unrest and hazard forecasting.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geochemistry & Geophysics
T. Shreve, R. Grandin, M. Boichu
Summary: Passive volcanic degassing has a significant impact on the pressurization state of a magma reservoir. The study on Ambrym volcano shows that the subsidence episode corresponds to a decrease in reservoir pressure, and the injected magma can counterbalance the depressurization effect.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Review
Environmental Sciences
Luca Caricchi, Meredith Townsend, Eleonora Rivalta, Atsuko Namiki
Summary: Understanding the storage, release, and ascent of magma is crucial for predicting volcanic activity, and requires an interdisciplinary approach that combines real-time monitoring and geophysical surveys with petrology and volcanic eruptive history.
NATURE REVIEWS EARTH & ENVIRONMENT
(2021)
Review
Geosciences, Multidisciplinary
J. W. Neuberg, B. Taisne, M. Burton, G. A. Ryan, E. Calder, N. Fournier, A. S. D. Collinson
Summary: Since the eruption began in 1995, Soufrie`re Hills volcano on Montserrat has experienced five phases of magma extrusion and corresponding pauses. Despite a lack of eruptive surface activity since 2010, ongoing outgassing and island-wide inflation suggest that the volcano is still showing signs of unrest. By using numerical modelling and comparing various deformation models, researchers aim to understand the current state of the volcano and assess its potential for future eruptions.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2022)
Article
Geochemistry & Geophysics
Tonin Bechon, Melvyn Billon, Olivier Namur, Olivier Bolle, Paul Fugmann, Helene Foucart, Jean-Luc Devidal, Nicolas Delmelle, Jacqueline Vander Auwera
Summary: Researchers investigated the magmatic system of Osorno volcano by collecting and studying major units, revealing storage conditions and differentiation processes, providing important insights for predicting future volcanic activity.
Article
Green & Sustainable Science & Technology
Mar Alonso, Nemesio M. Perez, Pedro A. Hernandez, Eleazar Padron, Gladys Melian, Fatima Rodriguez, German Padilla, Jose Barrancos, Maria Asensio-Ramos, Thrainn Fridriksson, Hirochika Sumino
Summary: This study presents an extensive analysis of helium emissions and thermal energy released from volcanic systems, revealing a direct relationship between diffuse helium emissions and the rise of mantle fluids. These findings are important for inferring the existence of deep and hidden geothermal resources, especially in areas without obvious geothermal manifestations.
Article
Multidisciplinary Sciences
Takeshi Nishimura
Summary: The study found that the likelihood of new eruptions increases two to three times in the 5-10 years following large earthquakes for volcanoes where the generated static dilatational strain exceeds 0.5 mu, while the eruption likelihood does not increase for volcanoes that are subjected to strong ground motion alone. This suggests that it is possible to evaluate the likelihood of triggered eruptions and prepare for new eruptions when a large earthquake occurs.
SCIENTIFIC REPORTS
(2021)
Article
Geosciences, Multidisciplinary
Emma J. Liu, Kieran Wood, Alessandro Aiuppa, Gaetano Giudice, Marcello Bitetto, Tobias P. Fischer, Brendan T. McCormick Kilbride, Terry Plank, Tom Hart
Summary: The South Sandwich Volcanic Arc is a remote and enigmatic volcanic arc characterized by persistent gas emissions and frequent eruptive activity. Detailed measurements during an expedition in January 2020 revealed continuous gas emissions from Mt. Michael on Saunders Island, as well as low temperature fumaroles at active centers indicating interaction between magmatic fluids and hydrothermal systems. Carbon isotope measurements suggest a mantle-dominated carbon source along with a possible mixing of upper mantle and subduction components.
BULLETIN OF VOLCANOLOGY
(2021)
Article
Geosciences, Multidisciplinary
David E. Jessop, Severine Moune, Roberto Moretti, Dominique Gibert, Jean-Christophe Komorowski, Vincent Robert, Michael J. Heap, Alexis Bosson, Magali Bonifacie, Sebastien Deroussi, Celine Dessert, Marina Rosas-Carbajal, Arnaud Lemarchand, Arnaud Burtin
Summary: This study analyzed volcanic unrest at La Soufriere de Guadeloupe using airborne thermal camera surveys and in situ measurements. The results showed that the volcano emits 36.5 +/- 7.9 MW of heat, with dominant fumarolic heat flux. The increasing instability of the volcano and the emergence of new high-flux fumaroles highlight the importance of continued surveillance and research strategies.
BULLETIN OF VOLCANOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Jane H. Scarrow, Axel K. Schmitt, Jenni Barclay, Matthew S. A. Horstwood, Andrew J. Bloore, Thomas E. Christopher
Summary: The study of Soufriere Hills Volcano reveals that zircon ages and compositions provide temporal constraints on magma reservoir processes. Zircon trace element concentrations and Ti-in-zircon crystallisation temperatures indicate crystallisation in isolated, small-volume lenses.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2021)
Article
Geochemistry & Geophysics
Michael J. Heap, Tobias S. Baumann, Marina Rosas-Carbajal, Jean-Christophe Komorowski, H. Albert Gilg, Marlene Villeneuve, Roberto Moretti, Patrick Baud, Lucille Carbillet, Claire Harnett, Thierry Reuschle
Summary: The study shows that hydrothermal alteration significantly increases volcano deformation and collapse volume, decreasing volcano stability and expediting volcano spreading, thus increasing the likelihood of mass wasting events and associated volcanic hazards. Monitoring hydrothermal alteration and its evolution at active volcanoes worldwide is therefore crucial.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Alessandro Aiuppa, Patrick Allard, Benjamin Bernard, Francesco Maria Lo Forte, Roberto Moretti, Silvana Hidalgo
Summary: This study presents new results on the composition of volcanic gas collected at the Minas de Azufre fumarolic field in the Galapagos archipelago. The gas is found to be moderately hydrous and rich in CO2, with a low abundance of sulfur. The emissions are mainly derived from magma and also contain a mixture of shallow meteoric water. The results suggest that the gases are sourced from a magma reservoir located approximately 2 km beneath the caldera floor.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Article
Geology
Krzysztof Sokol, Adrian A. Finch, William Hutchison, Jonathan Cloutier, Anouk M. Borst, Madeleine C. S. Humphreys
Summary: Alkaline igneous rocks contain abundant high-field-strength element (HFSE) and rare-earth element (REE) deposits. Late-stage hydrothermal fluids associated with alkaline magmas can transport HFSEs. The alteration of country rocks during the emplacement of a syenite magma in Greenland was studied, revealing a tenfold increase in HFSE concentrations. These findings are crucial for understanding the formation of REE-HFSE ores.
Article
Geochemistry & Geophysics
Marian B. Holness, Madeleine C. S. Humphreys, Olivier Namur, Jens C. O. Andersen, Christian Tegner, Troels F. D. Nielsen
Summary: The mush on the vertical walls of the Skaergaard Intrusion reached a maximum thickness of about 180 m and was highly unstable, with continuous material loss and episodic collapse events. This study highlights the significance of vertical walls in supplying loose material for the formation of mobile magmatic slurries.
JOURNAL OF PETROLOGY
(2022)
Article
Geochemistry & Geophysics
Madeleine A. Stow, Julie Prytulak, Madeleine C. S. Humphreys, Geoffrey M. Nowell
Summary: This study investigates the calc-alkaline Boggy Plain Zoned Pluton in southeast Australia using petrological examination and Fe and Zn isotopic analysis. The results show that the Fe isotopic composition increases with decreasing MgO content in whole rock samples, and the mineral separates exhibit a heavy Fe isotope enrichment sequence of magnetite > biotite = hornblende > pyroxene. The study emphasizes the importance of accurately determining temperature and modal mineralogy when modeling Fe isotopic variations in plutonic suites.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Engineering, Electrical & Electronic
Domenico Longo, Gaetano Giudice, Giuseppe D'Arrigo, Antonella Sciuto
Summary: This work presents a compact, portable, and remotely operable apparatus for optical absorbance measurements in the ultraviolet region. The system, which utilizes a commercial LED as the light source and a specially designed photo-detector, demonstrates good sensitivity and reliability. It is particularly suitable for measuring low-level concentrations of SO2 in volcanic environments. The laboratory tests and calibration for SO2 monitoring are discussed in detail.
IEEE SENSORS JOURNAL
(2022)
Article
Geochemistry & Geophysics
Martin F. Mangler, Madeleine C. S. Humphreys, Fabian B. Wadsworth, Alexander A. Iveson, Michael D. Higgins
Summary: Crystal shapes in volcanic rocks vary with magma conditions and growth volume, with smaller crystals being prismatic and larger crystals being tabular. The variation in crystal shapes can be used to determine volcanic rock history and is an important factor in modeling magma rheology.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2022)
Article
Geochemistry & Geophysics
Mike Cassidy, Alexander A. Iveson, Madeleine C. S. Humphreys, Tamsin A. Mather, Christoph Helo, Jonathan M. Castro, Philipp Ruprecht, David M. Pyle
Summary: The partitioning of halogens in magmas is important for understanding geological processes. This study provides new data on fluid/melt partition coefficients for halogens under different conditions, and evaluates the effects of changing fluid composition on partitioning. The results show that partition coefficients are influenced by pressure, temperature, and fluid composition. The experimental results provide realistic constraints on halogen partitioning in natural conditions and can be useful for the interpretation of melt inclusions and volcano gas data.
AMERICAN MINERALOGIST
(2022)
Article
Geochemistry & Geophysics
Alexander A. Iveson, Madeleine C. S. Humphreys, Frances E. Jenner, Barbara E. Kunz, Ivan P. Savov, Jan C. M. De Hoog, Tatiana G. Churikova, Boris N. Gordeychik, Samantha J. Hammond, Pavel Yu Plechov, Jon Blundy, Samuele Agostini
Summary: This study investigates the magma generation and storage processes in the Tolbachik volcanic field, Russia, and explores the evolution of volatile phase and enrichment of chalcophile metals, particularly copper (Cu). The research reveals spatially variable magma storage conditions and different volatile contents and degassing histories for magmas feeding different monogenetic cones. The study also demonstrates that the Tolbachik volcanic field has a unique enrichment in Cu compared to other volcanoes in the region.
JOURNAL OF PETROLOGY
(2022)
Article
Geochemistry & Geophysics
Martin F. Mangler, Madeleine C. S. Humphreys, Eshbal Geifman, Alexander A. Iveson, Fabian B. Wadsworth, Richard A. Brooker, Amanda Lindoo, Keiji Hammond
Summary: This study investigates crystal growth in an intermediate scenario where the rates of reaction at the crystal-melt interface are similar to the rates of diffusive transport of ions through the melt. The experimental investigation of euhedral plagioclase crystal shapes in dry mafic and hydrous silicic melts reveals significant variations in aspect ratios and relative growth rates. The proposed anisotropic growth model explains these differences in terms of melt diffusivity and suggests that crystals formed in this diffusion-moderated growth regime may not show typical diffusion-controlled growth features.
JOURNAL OF PETROLOGY
(2023)
Article
Chemistry, Analytical
Graziano Larocca, Danilo Contrafatto, Andrea Cannata, Gaetano Giudice
Summary: Volcano monitoring is crucial for mitigating risks posed by volcanic phenomena. Even in remote Antarctic regions, significant hazards can occur from volcanic eruptions. Therefore, it is important to develop monitoring systems in Antarctic volcanoes, which face extreme climate conditions. This study describes a multiparametric monitoring system deployed on Melbourne volcano in Antarctica, utilizing seismic, geochemical, and thermal sensors. The chosen installation sites are fumarolic ice caves, ensuring instrument protection and year-round stability. The technological solutions implemented in this study can facilitate volcano monitoring in other polar environments.
Article
Geosciences, Multidisciplinary
Michael J. Heap, Valentin R. Troll, Chris Harris, H. Albert Gilg, Roberto Moretti, Marina Rosas-Carbajal, Jean-Christophe Komorowski, Patrick Baud
Summary: This study explores the use of whole-rock delta O-18 and delta D values and water content as metrics to estimate the strength and stiffness of altered volcanic rocks. It finds that delta O-18 values can be used to estimate these parameters and highlights the advantage of this technique in scenarios with limited material.
BULLETIN OF VOLCANOLOGY
(2022)