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Fumarole - DOAJ

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Last Updated: 02 September 2022

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Efflorescent Sulphates with M + and M 2+ Cations from Fumarole and Active Geothermal Fields of Mutnovsky Volcano (Kamchatka, Russia)

Sulphate efflorescent minerals covering the surface of the Mutnovsky volcano's Donnoe and Dachnoe fields are referred to in this research. As a result of wateru2013rock interaction and fumarole release, minerals were precipitated on the argillic facies. Ammonia species were particularly prominent around fumaroles. The mineral assemblage described herein is unique in comparison to other geological environments and depicts the onset of low-temperature mineral formation associated with volcanism. H, Na, K, NH 4, Mg, Fe 2+, Fe 3+, and Al are all cations present in the thermal water, ranging from 2. 4 to 6. 5, as the dominance of acidic waters. The unique geochemistry of thermal water at the Mutnovsky volcano in the Mutnovsky volcano's Ti, Co. , and Ni impurities are represented by the Ti, Co. and Ni impurities. The mineral composition of alunite-supergroup minerals reflects the variety of hydrothermal occurrences and contains important information about the hydrothermal process. We note that we assert that the chemical composition of alunite-supergroup minerals corresponds to the types of hydrothermal occurrences and provides important data on the geochemistry of the hydrothermal process.

Source link: https://doi.org/10.3390/min12050600


Long-term variations of fumarole temperatures on Vulcano Island (Italy)

The final results of several reactions that are commonly associated with deep fluids during their travel to the surface are shown by Fumarole temperatures. Fibriroles and the time correlations with the volcanic system's various parameters are discussed in detail. Data obtained by continuous monitoring of fumaroles and the time relationship are discussed. According to Geochemical simulations applied to Vulcano Island's volcanic system, the overall increase of magmatic gas through the fractured system is an almost isoenthalpic process at depth, which shifts to an adiabatic process at shallow depth, where the rock permeability increases. The time varies in the fumarole temperatures, for example, reflect many physical variations of the system that can occur either at depth or near the surface. Temperature monitoring in La Fossa Cone's fumarolic area revealed short-term consequences as a result of rain events and negligible effects on other external agents.

Source link: https://doi.org/10.4401/ag-5183


Monitoring of fumarole discharge and CO2 soil degassing in the Azores: contribution to volcanic surveillance and public health risk assessment

The Azores' fluid geochemistry monitoring requires regular sampling and analysis of gas discharges from fumaroles, as well as measurements of CO2 diffuse soil gas emissions. Mapping of CO2 diffuse soil pollution in S. Miguel Island, contributed to the finding that several inhabited areas are located within hazard-zones. About 62% of the 896 houses are within the CO2 anomaly at Furnas village, on the north flank of Fogo volcano caldera, with 52% in areas of moderate to high risk. Continuous monitoring stations were installed in S. Miguel, Terceira, and Graciosa islands to measure and analyze the CO2 soil flux emissions. S. Miguel stations' average of CO2 flux is 350 g/m2/d to 530 g/m2/d at Fogo volcano.

Source link: https://doi.org/10.4401/ag-3234


Insights from Fumarole Gas Geochemistry on the Recent Volcanic Unrest of Pico do Fogo, Cape Verde

The results of the geochemical investigation of the fumarolic discharges at Cape Verde's Pico do Fogo volcano from 2007 to 2016 have been published. We present the findings of the geochemical examination of the fumarolic discharges from 2007 to 2016. During this time, Pico do Fogo suffered a volcanic eruption that lasted 77 days, from a new vent u223c2. 5 kilometers from the fumaroles. The differences observed in F1 and F2's u03b418O and u03b42H reveal different fluid source contributions and/or fractionation processes. Despite no significant changes being made in the outlet fumarole temperatures, two significant rises were recorded in the vapor fraction of fumarolic discharges between 2010 and 2013 respectively, 2014 and 2015. During 2008 and 2013, gases with a high magmatic component crept towards the surface within the Pico do Fogo system. F2 recorded two CO2/Stotal peaks, the first in late 2010 and the second after eruption onset, suggesting the presence of magmatic pulses in the volcanic system. These varying reactivities have been found at the base of the device, and more importantly, indicate the typical time lags between gas release times at sea and their landfall. This research aids in understanding the behaviour of the Pico do Fogo volcano's isotopic and isotopic composition of the fumaroles, allowing us to detect future episodes of volcanic eruptions and minimize volcanic risk.

Source link: https://doi.org/10.3389/feart.2021.631190


Sabang Submarine Volcano Aceh, Indonesia: Review of Some Trace and Rare Earth Elements Abundances Produced by Seafloor Fumarole Activities

The collected samples of element abundances were mostly obtained from seafloor sediments in the vicinities of active fumaroles, either by grab sampler operated from a survey boat above fumarole point or by diver directly took the samples on the seafloor, particularly at Serui - Sabang Bay. Samples closed to seafloor fumaroles contain a variety of trace and rare earth elements, according to the report. Although numerical relationships between Fe, Zn, and Ni as the main sulphide minerals with sulphur are negligible in the Sabang Sea, statistical correlations between Fe, Zn, and Ni are not apparent.

Source link: https://doi.org/10.17014/ijog.3.3.173-182


The Pisciarelli main fumarole mechanisms reconstructed by electrical resistivity and induced polarization imaging

Abstract Pisciarelli, along with the nearby Solfatara maar-diatreme, forms the Campi Flegrei caldera's most active structure in terms of degassing and seismic activity. This paper aims to establish the physical configuration of the Pisciarelli hydrothermal system by electrical resistance, time-domain-induced polarization tomography, and self-potential mapping. Based on this latest renovation of the Pisciarelli fumarolic field structural context, a new conceptual model has been introduced that is capable of both describing the operations controlling soffione formation and eluciding the role played by the fluid/gas of deeper origin in the shallow fluid circulation system and elucidating the mechanism governing soffione formation.

Source link: https://doi.org/10.1038/s41598-021-97413-1


Time-Lapse Landform Monitoring in the Pisciarelli (Campi Flegrei-Italy) Fumarole Field Using UAV Photogrammetry

The value of new imaging technologies to help identify hazardous geological environments cannot be overstated. Our report describes a short-term monitoring of the fluid and diffuse Pisciarelli degassing system induced by the interplay between intense rainfall and hydrothermal activity. This zone, which is several hundred meters east of Campi Fleggen's Solfatara Crater, is characterized by persistent soil degassing, fluid leakage from ephemeral vents, and hot mud pools. We conducted repeated photogrammetric UAV surveys in late-2019 and 2020 using the Structure from Motion technology. During one year of surveys, this strategy allowed us to produce dense 3D point clouds and digital orthophotos. The results reveal the advantages of photogrammetry data using UAV for the accurate remote monitoring and mapping of active volcanoes and craters in harsh and fragile environments.

Source link: https://doi.org/10.3390/rs13010118

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions