A5063881386- Atmospheric and Environmental Gas Dynamics
- CO2 Sequestration and Geologic Interactions
- Geochemistry and Geologic Mapping
- Radioactivity and Radon Measurements
- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Geophysical and Geoelectrical Methods
- Marine and coastal ecosystems
- Geology and Paleoclimatology Research
- Ocean Acidification Effects and Responses
- Methane Hydrates and Related Phenomena
- Seismic Waves and Analysis
- Groundwater and Isotope Geochemistry
- Radioactive contamination and transfer
- Geological and Geophysical Studies
- Marine Biology and Ecology Research
- Geological and Geophysical Studies Worldwide
- Geophysical Methods and Applications
- Earthquake Detection and Analysis
- Air Quality Monitoring and Forecasting
- Seismology and Earthquake Studies
- Geological Formations and Processes Exploration
- Hydrocarbon exploration and reservoir analysis
- Marine and environmental studies
- Environmental Justice and Health Disparities
Universidade dos Açores
2016-2025
Vulcan (United States)
2022
Instituto de Investigacao das Pescas e do Mar
2022
Institute of Volcanology and Seismology
2016
Carbon dioxide (CO 2 ) diffuse degassing structures (DDS) at Furnas volcano (São Miguel Island, Azores) are mostly associated with the main fumarolic fields, evidence that CO soil is surface expression of rising steam from hydrothermal system. Locations anomalous flux mainly controlled by tectonic oriented WNW–ESE and NW–SE geomorphology volcano, as evidenced several DDS located in depressed areas crater margins. Hydrothermal emissions estimated to be ∼968 t d −1 . Discrimination between...
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Furnas volcano, one of the three active central volcanoes São Miguel (the Azores archipelago), hosts mineral waters with significant special variations, divided into hyperthermal (89.4–95.4 °C), thermal (29.9–70.0 and cold (14.2–21.4 °C) waters. Groundwaters are classified as Na-HCO3, a neutral to slightly acidic pH, except SO4-Na sample. The major elements primarily influenced by rock leaching volcanic input, patterns also reflected in trace elements, including rare earth elements. cations,...
Fluid geochemistry monitoring in the Azores involves regular sampling and analysis of gas discharges from fumaroles measurements CO2 diffuse soil emissions. Main degassing areas under are associated with hydrothermal systems active central volcanoes S. Miguel, Terceira Graciosa islands. Fumarole discharge since 1991 show that apart steam these emissions dominated H2S, H2, CH4 N2 minor amounts. Mapping Miguel Island lead to conclusion some inhabited located within hazard-zones. At Furnas...
Abiotic formation of n-alkane hydrocarbons has been postulated to occur within Earth's crust.Apparent evidence was primarily based on uncommon carbon and hydrogen isotope distribution patterns that set methane its higher chain homologues apart from biotic isotopic compositions associated with microbial production closed system thermal degradation organic matter.Here, we present the first global investigation n-alkanes in volcanic-hydrothermal fluids hosted by basaltic, andesitic, trachytic...
Caldeiras da Ribeira Grande is one of the degassing areas Fogo, a trachytic central volcano located at São Miguel Island (Azores archipelago). Recently, new steam emissions, soil CO2 and temperature anomalies developed towards inhabited area, causing high indoor values affecting vegetation several small animals that were found dead in depressions low-ventilated zones. During July–August 2021, flux survey was carried out on north flank volcano, estimating gas release least 40 t d−1 (excluding...
Diffuse degassing through the soil is commonly observed in volcanic areas and monitoring of carbon dioxide flux at surface can provide a safe effective way to infer state activity system. Continuous measurement stations are often installed on active volcanoes such as Furnas (Azores archipelago), which features low temperature fumaroles, hot cold CO 2 rich springs, several diffuse areas. As other volcanoes, fluxes measured correlated with environmental variables, air or barometric pressure,...
Abstract Time series of soil CO 2 efflux recorded in the Azores archipelago volcanic‐hydrothermal areas feature daily and seasonal variations. The values were lower during summer than winter season. diurnal higher at dawn early afternoon, contrary to that observed biogenic environments. cycles correlated well with environmental variables, such as air temperature, wind speed, barometric pressure, which also showed low‐ high‐frequency periodicities. Several simulations performed here using...
Accurate geophysical imaging of shallow subsurface features provides crucial constraints on understanding the dynamics volcanic systems. At Furnas Volcano (Azores), intense circulation fluids at depth leading to high CO2 outgassing and flank destabilization poses considerable threat local population. Presented is a novel 3-D electrical resistivity model developed from 39 magnetotelluric soundings that images hydrothermal system 1 km. The two conductive zones, one 100 m another 500 depth,...
Recent geophysical evidence for large-scale regional crustal inflation and localized magma intrusion has made Lastarria volcano (northern Chile) the target of numerous geological, geophysical, geochemical studies. The chemical composition volcanic gases sampled during discrete campaigns from indicated a well-developed hydrothermal system direct fumarole samples in A.D. 2006, 2008, 2009, shallow degassing using measurements situ plume sampling techniques 2012. It is unclear if differences...
Water-covered areas may lead to gaps in surface electromagnetic surveys, causing reduced resolution and, as a consequence, increased uncertainty derived subsurface models. We have evaluated boat-towed floating central loop time-domain technique that mitigates this problem. It facilitates obtaining data with spatial sampling density, which is rarely possible standard instrumentation on land, and it only requires moderate logistical effort. A unique field study shallow volcanic lake...
Abstract Substantial terrestrial gas emissions, such as carbon dioxide (CO 2 ), are associated with active volcanoes and hydrothermal systems. However, while fundamental for the prediction of future activity, it remains difficult so far to determine depth sources. Here we show how combined measurement CO radon-222 fluxes at surface constrains degassing two systems in geodynamically contexts: Furnas Lake Fumarolic Field (FLFF, Azores, Portugal) mantellic volcano-magmatic , Syabru-Bensi...