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  • 03. Hydrosphere::03.04. Chemical and biological::03.04.03. Chemistry of waters  (5)
  • Geochemistry  (1)
  • Astronomy
  • E31
  • J24
  • Mt.Etna
  • gas chemistry
  • Aristotele University of Thessaloniki  (2)
  • Geological Society of Greece  (2)
  • Kluwer Academic Publishers  (2)
Collection
Keywords
Publisher
Years
  • 1
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    Fluid geochemistry investigations on the volcanic system of methana (2007)
    Geological Society of Greece
    Details
    Publication Date: 2017-04-04
    Description: An extensive geochemical survey on the fluids released by the volcanic/geothermal system of Methana was undertaken. Characterization of the gases was made on the basis of the chemical and isotopic (He and C) analysis of 14 samples. CO2 soil gas concentration and fluxes were measured on the whole peninsula at more than 100 sampling sites. 31 samples of thermal and cold groundwaters were also sampled and analysed to characterize the geochemistry of aquifers. Anomalies referable to the geothermal system, besides at known thermal manifesta-tions, were also recognized at some anomalous degassing soil site and in some cold groundwater. These anomalies were always spatially correlated to the main active tectonic system of the area. The total CO2 output of the volcanic system has been preliminary estimated in about 0.2 kg s-1. Although this value is low compared to other volcanic systems, anomalous CO2 degassing at Methana may pose gas hazard problems. Such volcanic risk, although restricted to limited areas, cannot be neglected and further studies have to be undertaken for its better assessment
    Description: Published
    Description: 712-722
    Description: N/A or not JCR
    Description: open
    Keywords: soil gases ; CO2 fluxes ; gas hazard ; groundwater chemistry ; 03. Hydrosphere::03.02. Hydrology::03.02.03. Groundwater processes ; 03. Hydrosphere::03.04. Chemical and biological::03.04.03. Chemistry of waters ; 03. Hydrosphere::03.04. Chemical and biological::03.04.05. Gases ; 03. Hydrosphere::03.04. Chemical and biological::03.04.06. Hydrothermal systems ; 03. Hydrosphere::03.04. Chemical and biological::03.04.07. Radioactivity and isotopes ; 04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistry ; 04. Solid Earth::04.08. Volcanology::04.08.01. Gases ; 04. Solid Earth::04.08. Volcanology::04.08.08. Volcanic risk
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 2
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    A case study of gas-water-rock interaction in a volcanic aquifer: the south-western flank of Mt. Etna (Sicily) (2005)
    Kluwer Academic Publishers
    Details
    Publication Date: 2017-04-04
    Description: New chemical and isotope data for 74 groundwater samples from the southwestern slopes of Mt. Etna are presented. The processes responsible for the considerable chemical heterogeneity displayed by groundwaters were identified through factor analysis and by the use of mass balance calculations. A general hydrogeochemical model, concerning the interactions between the shallow volcanic aquifer, deep magmaderived fluids and the underlain sedimentary sequence, is also provided.
    Description: Published
    Description: 125-145
    Description: partially_open
    Keywords: Mt.Etna ; Hydrogeochemistry ; multivariate statistical analysis ; mass balance calculation ; 03. Hydrosphere::03.04. Chemical and biological::03.04.03. Chemistry of waters
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: book chapter
    Format: 535 bytes
    Format: 1646620 bytes
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  • 3
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    Rainwater Chemistry at Mt. Etna (Italy): natural and anthropogenic sources of major ions (2005)
    Kluwer Academic Publishers
    Details
    Publication Date: 2017-04-04
    Description: Major ion content of 37 wet-only rainwater samples collected on the southern flank of Mount Etna volcano was investigated. Measured pH values range from 3.80 to 7.22 and display a positive correlation with Ca2+ and an inverse correlation with NO−3 , suggesting that anthropogenic NOx are the most effective acidifying agents while Ca, likely as solid CaCO3, is the prevailing proton acceptor. Na/Cl ratios indicate a dominant marine origin for both species, while K, mg and Ca contents point to additional sources (soil dust, fertilisers etc.). Nitrate and sulphate concentrations display a nearly constant ratio indicating a common anthropogenic origin, and only a few samples are characterised by sulphate excess. The analysis of time series reveals a good correlation between the excess sulphate in rainwater and SO2 fluxes from the summit craters plume. Non sea salt chloride contents show also a significant correlation with volcanic activity indicating a magmatic sulphur and chloride contribution to rainwater. Meteoric flux estimations point to a prevailing magmatic origin for sulphur in the collected rainwaters while sea spray is the main source of chlorine.
    Description: Published
    Description: 89–102
    Description: partially_open
    Keywords: Etna ; rainwater chemistry ; major ions ; volcanic activity ; meteoric fluxes ; 03. Hydrosphere::03.04. Chemical and biological::03.04.03. Chemistry of waters
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Format: 732721 bytes
    Format: 535 bytes
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  • 4
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    CHEMICAL COMPOSITION OF ATMOSPHERIC BULK DEPOSITION AT THE INDUSTRIAL AREA OF GELA (SICILY, ITALY) (2014)
    Aristotele University of Thessaloniki
    Details
    Publication Date: 2017-04-04
    Description: Bulk deposition has been collected at six sampling sites in area of Gela plain (Italy) in the period from February 2008 to May 2009. Samples collected each two weeks were analysed for the major ion and trace elements content. Preliminary results allow identifying three different sources that control the abundance of the elements in atmospheric deposition: (1) sea spray, (2) geogenic dust, and (3) anthropogenic pollution. Due to the closeness of the coast, clear evidence of sea spray input is detectable for most of the samples. The high excess of non sea-salt sulphate (50 - 90% of the total) is prevailingly ascribable to the abundant SO2 emissions of the refinery. The pH values of the collected samples range from 4.2 to 8.6, with 80% of them above pH 6.5, indicating an extensive neutralization. This is due to NH3 coming from widespread agricultural activities in the plain of Gela, and geogenic CaCO3 either from local or from regional (desert dust) sources. Elevated levels of trace metals (Zn, V, Sb, Ni, Cr, Ni and Cu) can be observed in the samples collected close to the industrial area. All these elements can be identified as “anthropogenic” and attributed to the human activities, mainly to the industrial emissions, but a contribution could also derive from the intensive vehicular traffic.
    Description: Published
    Description: Thessaloniki, Greece
    Description: 6A. Monitoraggio ambientale, sicurezza e territorio
    Description: open
    Keywords: Rainwater ; Trace elements ; Petroleum refinery ; Sea spray ; Saharan dust ; 01. Atmosphere::01.01. Atmosphere::01.01.03. Pollution ; 03. Hydrosphere::03.04. Chemical and biological::03.04.03. Chemistry of waters
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Conference paper
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  • 5
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    HIGH VANADIUM CONCENTRATIONS IN GROUNDWATER AT EL HIERRO (CANARY ISLANDS, SPAIN) (2014)
    Aristotele University of Thessaloniki
    Details
    Publication Date: 2017-04-04
    Description: High concentrations of Vanadium have been measured in the groundwaters of the volcanic island of El Hierro. Values ranging from 19.4 to 288 μg/L are much higher than those generally found in natural water samples (〈 1 μg/L). Such increased contents mainly derive from the water-rock interaction processes within the aquifer formed by Vanadium-rich basaltic rocks. The mobility of Vanadium in these groundwaters is further enhanced by their oxidizing and alkaline conditions. Possible consequences on human health due to the consumption of these V-rich waters should be investigated.
    Description: Published
    Description: Thessaloniki, Greece
    Description: 4V. Vulcani e ambiente
    Description: open
    Keywords: Water quality ; volcanic aquifers ; Drinking water limits ; Water resources ; 03. Hydrosphere::03.04. Chemical and biological::03.04.03. Chemistry of waters
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Conference paper
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  • 6
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    GEOCHEMICAL CHARACTERIZATION OF NATURAL GAS MANIFESTATIONS IN GREECE (2010)
    Geological Society of Greece
    Details
    Publication Date: 2020-05-21
    Description: The Greek region is characterized by intense geodynamic activity with widespread volcanic, geothermal and seismic activity. Its complex geology is reflected in the large variety of chemical and isotopic composition of its gas manifestations. Basing on their chemical composition the gases can be subdivided in three groups, respectively CO2, CH4 or N2-dominated. On oxygen-free basis these three gases make up more than 97% of the total composition. The only exceptions are fumarolic gases of Nisyros that contain substantial amounts of H2S (up to more than 20%) and one sample of Milos that contains 15% of H2. CO2-dominated gases with clear mantle contribution in their He isotopic composition (R/Ra corrected for air contamination ranging from 0.5 to 5.7) are found along the subduction-related south Aegean active volcanic arc and on the Greek mainland close to recent (upper Miocene to Pleistocene) volcanic centers. These areas are generally characterized by active or recent extensive tectonic activity and high geothermal gradients. On the contrary, gases sampled in the more external nappes of the Hellenide orogen have generally a CH4- or N2-rich compositions and helium isotope composition with a dominant crustal contribution (R/Ra corr 〈 0.2). The chemical and isotopic characteristics of the emitted gas display therefore a clear relationship with the different geodynamic sectors of the region. Gas geochemistry of the area contributes to a better definition of the crust-mantle setting of the Hellenic region.
    Description: Published
    Description: 2327-2337
    Description: Patras, Greece
    Description: 2V. Struttura e sistema di alimentazione dei vulcani
    Description: N/A or not JCR
    Description: open
    Keywords: natural gas manifestations ; gas chemistry ; He- and C-isotope composition ; Geochemistry
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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