Article
Multidisciplinary Sciences
Maria Giulia Di Giuseppe, Roberto Isaia, Antonio Troiano
Summary: This paper presents the results of a new short-period magnetotelluric survey conducted on Vulcano Island (Italy), which provides detailed information on previously unexplored structures up to a depth of 2.5 km. The study identifies a moderate resistive anomaly in the La Fossa caldera area, which likely represents a conduit-like structure for the ascent of magmatic fluids. Various resistive anomalies are also detected in volcanic edifices, craters, volcanic conduits, and eruptive fissures. Additionally, a conductive anomaly is observed in the shallower hydrothermal system. Caldear faults are characterized by sharp resistivity contrasts. The findings contribute significantly to the understanding of geophysical and geochemical anomalies detected in the past year, particularly in relation to the Vulcano shallow hydrothermal system, and highlight the potential for hydrothermal/phreatic eruptive events.
SCIENTIFIC REPORTS
(2023)
Article
Multidisciplinary Sciences
J. E. Hunt, D. R. Tappin, S. F. L. Watt, S. Susilohadi, A. Novellino, S. K. Ebmeier, M. Cassidy, S. L. Engwell, S. T. Grilli, M. Hanif, W. S. Priyanto, M. A. Clare, M. Abdurrachman, U. Udrekh
Summary: This study provides a high-resolution characterization of both subaerial and submarine components of a volcanic flank collapse, revealing the extensive failure and landslide deposit. The findings are consistent with en-masse lateral collapse scenarios, and highlight the potential for rapid island growth leading to large-scale failure. Post-collapse eruptions resulted in the burial of the scar and landslide deposit with tephra.
NATURE COMMUNICATIONS
(2021)
Article
Energy & Fuels
J. Ledo, M. Garcia-Merino, H. Larnier, K. Slezak, P. Pina-Varas, A. Marcuello, P. Queralt, N. M. Perez, H. -U. Schmincke, M. Sumita
Summary: Gran Canaria, one of the Canary Islands off NW Africa, has been volcanically active for at least 15 million years. A new 3D electrical resistivity model of the island reveals high resistivity values near the surface in the Tejeda Caldera, while low resistivity values outside the caldera could indicate potential geothermal activity. This model suggests the presence of unconnected vertical-like structures that may have economic potential for geothermal energy.
Article
Environmental Sciences
Elisa Klein, Emma Hadre, Sebastian Krastel, Morelia Urlaub
Summary: Digital elevation models (DEMs) are crucial in natural hazard assessments. However, only 25% of the seafloor is mapped with high-resolution bathymetry, limiting research on volcanic islands.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Xiangyu Sun, Yan Zhan, Lingqiang Zhao, Jiandong Xu, Yongwei Zhao, Bin Zhao, Wendong Yang
Summary: This study used electrical structure imaging techniques to obtain new images of the 3D resistivity structure in the Wudalianchi volcanic field (WVF) in northeastern China. The results challenge the hypothesis of one or more magma reservoirs in the upper crust of the region, as no low-resistivity structure was found beneath certain volcanoes. The presence of a low-resistivity body beneath another volcano is attributed to saline aqueous free fluids, rather than magma. The findings have important implications for understanding volcanic eruption mechanisms and assessing eruption risks.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geochemistry & Geophysics
G. M. Hoversten, Erika Gasperikova, Randall Mackie, David Myer, Jim Kauahikaua, Greg A. Newman, Nestor Cuevas
Summary: In 2002 and 2003, a collaborative effort was made by several institutions in the United States to study the Kilauea volcano in Hawaii using the magnetotelluric technique. The purpose was to improve understanding of the volcano's magma reservoirs and conduits, as well as the rift zones, which have implications for landslides and their impact on coastal communities. The research involved data acquisition at multiple sites and the use of robust processing techniques. The results provided valuable insights into the volcano's internal structure.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Environmental Sciences
Samanta Gasco Cavero, Alejandro Garcia-Gil, Noelia Cruz-Perez, Luis Fernando Martin Rodriguez, Chrysi Laspidou, Albert Contreras-Llin, Gerard Quintana, Silvia Diaz-Cruz, Juan C. Santamarta
Summary: Emerging pollutants (EPs) refer to substances in wastewater that have not been studied, leading to uncertainties in regulations. Areas highly reliant on groundwater resources, such as El Hierro, are at risk of EP contamination. A study conducted in El Hierro revealed the presence of UV filters, UV stabilizers/blockers, and pharmaceutically active compounds (PhACs) in groundwater, with La Frontera being the most contaminated municipality. Different installations, such as piezometers and wells, showed higher EP concentrations, and sampling depth positively correlated with EP concentration. It is crucial to implement remediation measures and prevent EPs from entering the water cycle.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Food Science & Technology
Maria Lopez-Perez, Candelaria Martin-Luis, Antonio Catalan, Pedro A. Salazar-Carballo
Summary: The main source of drinking water in Tenerife is groundwater, which is extracted through an extensive network of galleries and wells. The volcanic context of the island can lead to increased radionuclide concentration activity in the groundwater. However, the measured radionuclide activity concentrations in the groundwater of Tenerife are below the recommended levels. Therefore, the contribution of groundwater to the effective dose for different age groups is within the safe range.
Article
Environmental Sciences
Miguel Angel Marazuela, Carlos Baquedano, Noelia Cruz-Perez, Jorge Martinez-Leon, Chrysi Laspidou, Juan Carlos Santamarta, Alejandro Garcia-Gil
Summary: This paper investigates the impact of volcanic dykes on the depth of the saline interface in coastal and island aquifers, as well as their influence on the availability of fresh groundwater. The study demonstrates that volcanic dykes increase the hydraulic gradient and the depth of the saline interface, leading to increased fresh groundwater reserves inland. The results also show that correctly locating production wells in areas affected by dykes can prevent salinization of groundwater. These findings are crucial for the management of fresh groundwater resources in coastal volcanic aquifers, particularly on volcanic islands such as the Hawaiian Islands or the Macaronesian archipelagos.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Alper Gurbuz
Summary: Analyzing pre- and post-eruption maps and images of volcanic edifices helps to quantitatively assess the impact of volcanic flank collapses. The collapses can lead to significant changes in the topography, potentially causing tsunamis and altering the landscape evolution. The eruption of Mount St. Helens provides a case study, showing increased percentage of collapsed area, formation of plateau morphology, and notable changes in slope and elevation.
ENVIRONMENTAL EARTH SCIENCES
(2022)
Article
Environmental Sciences
Eva Perez-Hernandez, Carolina Pena-Alonso, Elisabeth Fernandez-Cabrera, Luis Hernandez-Calvento
Summary: The study assessed the landscape heritage of the Corralejo dunefield and found that it has a high landscape value, which decreases in areas bordering the urban area or frequented by tourists. Recommendations were made based on user perceptions to improve the area and establish a balance between the physical medium and anthropic pressure.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Geochemistry & Geophysics
R. Corseri, S. Planke, L. J. Gelius, J. I. Faleide, K. Senger, M. M. Abdelmalak
Summary: Magnetotelluric (MT) data can be used to resolve interpretation issues of deep structures in offshore rifted margins by detecting the intermixing of partially serpentinized saline fluids with seawater in overlying marine sediments.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Lingqiang Zhao, Yaxuan Hu, Yan Zhan, Xiangyu Sun, Qingliang Wang, Yiqing Zhu, Cong Cao
Summary: The Longgang volcanic field (LVF) is one of the largest intraplate monogenetic volcanic regions in China, with a potential hazard of eruption. The volcanic field has experienced rapid surface uplift and significant seismic activity. Magnetotelluric data reveals the presence of two main high-conductivity structures, interpreted as magmatic channels, beneath the LVF. The modern surface uplift and seismicity are attributed to upwelling and intrusion along the magmatic channels. These high-conductivity structures extend from the Moho to the upper mantle, suggesting a direct connection between the magmatic system and the upper mantle.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
F. G. Montesinos, J. Arnoso, D. Gomez-Ortiz, M. Benavent, I. Blanco-Montenegro, E. Velez, T. Martin-Crespo, A. V. Gorbatikov, M. Y. Stepanova
Summary: This study presents a Bouguer anomaly gravity map of Gran Canaria Island based on a new gravity data set and marine gravity data. Using gravity inversion, the study investigates the structures beneath the island's surface and derives a 3D gravity sources model. The results show different structures related to volcanic stages, magma plumbing systems, and low-density bodies in the center and shallow areas of the island.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
F. G. Montesinos, J. Arnoso, D. Gomez-Ortiz, M. Benavent, I Blanco-Montenegro, E. Velez, T. Martin-Crespo, A. Gorbatikov, M. Y. Stepanova
Summary: By utilizing new gravity data and marine gravity data, a 3D gravity sources model of Gran Canaria Island has been derived to investigate the geological structures beneath its surface. The density model identifies structures related to different volcanic stages, revealing the evolutionary history of Gran Canaria.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
P. Alfaro, A. Sanchez-Alzola, I. Martin-Rojas, F. J. Garcia-Tortosa, J. Galindo-Zaldivar, M. Aviles, A. C. Lopez Garrido, C. Sanz de Galdeano, P. Ruano, F. J. Martinez-Moreno, A. Pedrera, M. C. Lacy, M. J. Borque, I. Medina-Cascales, A. J. Gil
Summary: The fault slip rate is a significant parameter in seismic hazard assessment. This study in the Baza sub-Basin of SE Spain combines geological and geodetic data to analyze active faults, obtaining short-term slip rates and revealing discrepancies with long-term rates. The results suggest a potentially complex rupture involving the Baza and Galera Faults in future seismic hazard assessments.
JOURNAL OF GEODYNAMICS
(2021)
Article
Geosciences, Multidisciplinary
Ricardo Pereira, Joao Mata, Ricardo S. Ramalho, Filipe M. Rosas, Beatriz Silva, Patricia Represas, Claudia Escada
Summary: The magma-poor West Iberian Margin in the Peri-Atlantic alkaline province has shown evidence of important magmatic activity through large volcanic and intrusive features recorded in high-resolution multichannel seismic data. The magmatism in the region occurred during two main pulses and types of activity, including fissural and fault-controlled volcanism characterized by massive lobate/sheet lava flows, as well as a second event of mid to late Campanian age with the Estremadura Spur laccolith and Fontanelas compound volcano. The estimated total volume of rock emplaced or extruded in this relatively short period exceeds 1.452 km³, highlighting the significance of magmatism in this sector of the West Iberian Margin.
Article
Geosciences, Multidisciplinary
Joana Alexandra Ferreira, Ines Pereira, Telmo Bento dos Santos, Joao Mata
Summary: The Figueira de Castelo Rodrigo-Lumbrales Anatectic Complex in the Central Iberian Zone has been studied for its metamorphic ages and exhumation history. The complex experienced peak metamorphism 316.8 +/- 2.0 million years ago, followed by rapid cooling and exhumation. The zircon ages of the complex are similar to those of the Excomungada Formation, suggesting a shared geological history. The detrital zircon ages of the Pinhao Formation indicate different sources from the Beiras Group, indicating the presence of a geological barrier. This study provides new insights into the geological evolution of the region.
JOURNAL OF THE GEOLOGICAL SOCIETY
(2022)
Article
Geochemistry & Geophysics
Claudia Escada, Patricia Represas, Fernando Santos, Ricardo Pereira, Joao Mata, Filipe M. Rosas
Summary: This study uses potential field data and seismic reflection data to describe and characterize the geometry and nature of magmatic features located near the Estremadura Spur on the West Iberian Margin. The results show that these magmatic features have different properties and shapes, providing important evidence to better understand the magmatic activity in the region.
Article
Geochemistry & Geophysics
David Schlaphorst, Graca Silveira, Joao Mata, Frank Krueger, Torsten Dahm, Ana M. G. Ferreira
Summary: This study investigates seismic anisotropy beneath the Madeira and Canary hotspots using a dense set of shear wave splitting observations. The results reveal heterogenous flow patterns and suggest that melt pocket orientation in magma reservoirs influence the flow patterns. Additionally, the presence of a mantle plume leads to complex and small-scale heterogeneous anisotropy observations.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Rute Santos, Maria Alexandra Pais, Joana Alves Ribeiro, Joao Cardoso, Luis Perro, Andre Santos
Summary: The influence of shield wires on geoelectric-induced currents (GICs) in power systems is clarified in this study. A simplified power system model, including one transmission line and one shield wire connecting two substations, is used. The Thevenin equivalent circuit, along with the grounding resistances of the substations, is derived to accurately represent the effects of the complete circuit on GICs. The model expands on previous studies by considering the induced voltage along the shield wires and can be applied to relatively short transmission lines.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2022)
Article
Geosciences, Multidisciplinary
Gabriella de Oliveira Amaral Quaresma, Anderson Costa dos Santos, Eduardo Reis Viana Rocha Jr, Juliana Bonifacio, Caio Assumpcao Queiroz Rego, Joao Mata, Claudio de Morisson Valeriano, Fred Jourdan, Nadine Mattielli, Mauro Cesar Geraldes
Summary: This study presents the first integrated analysis of the Sr-Nd-Pb isotopic compositions of Davis Bank and suggests that the formation of Davis Bank involves the participation of one or several enriched components. A HIMU-type pyroxenite is proposed as one of these enriched components. Modeling of the isotopic data reveals that the isotopic composition of Davis Bank is mainly achieved by the mixing of a dominant asthenospheric component (DMM) with EMI and HIMU melts. The Trindade Plume hypothesis lacks convincing evidence, and it is suggested that the Vit ' oria-Trindade Ridge is a surface manifestation of upwelling flow attributed to abnormal fertile shallow sources within a depleted mantle matrix.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Anderson Costa dos Santos, Gabriella de Oliveira Quaresma, Julio Cezar Mendes, Joao Mata, Mauro Cesar Geraldes, Fred Jourdan, Werlem Holanda dos Santos, Cecilia Pavon Pivetta, Leonardo Benedini, Daniel Gregori
Summary: This article focuses on the rock characteristics and geological background of the Davis Bank region, located offshore of the Eastern Brazilian margin. The study utilizes methods such as rock age determination and isotope analysis to obtain geological information and reveal significant insights into plate tectonics, volcanic rock evolution, and magma properties in this area.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2023)
Article
Biology
Carlos A. Gois-Marques, Pedro Correia, Andre Nel, Jose Madeira, Miguel Menezes de Sequeira
Summary: This study reports the first fossil of an ant found in the Macaronesian archipelagos in the Atlantic Ocean. The fossil, a partial forewing, was discovered within lacustrine sediments from Madeira Island dated to 1.3 million years ago in the early Pleistocene. Although the species cannot be identified, this fossil record provides evidence for the presence of ants in the Madeira archipelago during the early Pleistocene.
HISTORICAL BIOLOGY
(2022)
Article
Plant Sciences
Carlos A. Gois-Marques, Lea de Nascimento, Jose Maria Fernandez-Palacios, Jose Madeira, Miguel Menezes de Sequeira
Summary: This study discusses the systematic affinities of the first wind-pollinated besom heaths fossils found in the Macaronesia, assigning them to a species within the Palaearctic Erica sect. Chlorocodon. The fossils suggest a colonization of Madeira Island prior to 1.3 Ma, indicating the presence of wind-pollinated besom heaths since at least the early Pleistocene.
Article
Plant Sciences
Filipe Adao, Joao C. Campos, Joao A. Santos, Aureliano C. Malheiro, Helder Fraga
Summary: Climate change is driving changes in temperature and precipitation patterns in Europe. Future projections indicate that these trends will continue in the coming decades. This poses challenges for the sustainability of viniculture, and adaptation efforts are needed. Using Ecological Niche Models, researchers found that the suitability for grape cultivation will shift significantly under future climate change.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Agronomy
Tiago B. Ramos, Ana R. Oliveira, Hanaa Darouich, Maria C. Goncalves, Francisco J. Martinez-Moreno, Mario Ramos Rodriguez, Karl Vanderlinden, Mohammad Farzamian
Summary: The soil water balance is crucial for improving crop water use in agricultural fields. Current estimates neglect the variability of soil properties, which significantly impacts soil water dynamics at the field scale. This study used the MOHID-Land model to compute the spatial distribution of soil water dynamics in an almond field in Portugal. Results included maps of soil water contents, crop transpiration, soil evaporation, percolation, and surface runoff, providing insights into preferential flow pathways and control factors at the field scale. Identifying development needs would enhance the significance of this study for precision agriculture.
AGRICULTURAL WATER MANAGEMENT
(2023)
Article
Astronomy & Astrophysics
Joana Alves Ribeiro, Fernando J. G. Pinheiro, Maria Alexandra Pais, Rute Santos, Joao Cardoso, Pedro Baltazar-Soares, Fernando A. A. Monteiro Santos
Summary: The study computes geomagnetically induced currents (GICs) in the power network of mainland Portugal, considering all high voltage lines. A 3D conductivity model for the west region of the Iberian Peninsula is used to reveal the influence of different crustal domains on GIC distribution. GICs are characterized based on significant storms during solar cycle 24, and the highest GICs are found near the transition between geotectonic units. Uncertainties in the conductivity model and grounding resistances are evaluated, and a GIC sensor is installed to validate the model.
SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS
(2023)
Article
Astronomy & Astrophysics
P. Baltazar-Soares, F. J. Martinez-Moreno, J. Alves Ribeiro, F. A. Monteiro Santos, P. Ribeiro, M. A. Pais, A. Mateus, J. Pous
Summary: The first 3D resistivity model for Portugal mainland is reported using data from 31 broadband MT soundings. The model reveals large crustal volumes with contrasting resistivity values and provides important insights into the electrical properties of deep-seated rocks and the structure of the crust.
EARTH AND SPACE SCIENCE
(2023)
