View in EDS HTML Full Text PDF Full Text

Geochemistry of gas and water discharge from the magmatic-hydrothermal system of Guallatiri volcano, northern Chile.

Saved in:
Bibliographic Details
Title: Geochemistry of gas and water discharge from the magmatic-hydrothermal system of Guallatiri volcano, northern Chile.
Authors: Inostroza, Manuel1,2 (AUTHOR) manuel.inostroza@alumnos.ucn.cl, Tassi, Franco3,4 (AUTHOR), Aguilera, Felipe2,5,6 (AUTHOR), Sepúlveda, José Pablo3 (AUTHOR), Capecchiacci, Francesco7 (AUTHOR), Venturi, Stefania3,4 (AUTHOR), Capasso, Giorgio8 (AUTHOR)
Source: Bulletin of Volcanology. Jul2020, Vol. 82 Issue 7, p1-16. 16p.
Subject Terms: *Glow discharges, *Geochemistry, *Volcanic hazard analysis, *Helium isotopes, *Hot springs, *Submarine volcanoes
Geographic Terms: Chile
Abstract: This work presents the first chemical and isotopic (δ13C-CO2, δ13C-CH4, 3He, 4He, 20Ne, 40Ar, 36Ar, δ18O, and δD) data for fluid discharges from Guallatiri volcano, a remote and massive stratovolcano, which is considered as the second most active volcano of the Central Volcanic Zone (CVZ) in northern Chile. Fumarolic gases had outlet temperatures of between 80.2 and 265 °C, and showed a significant magmatic fluid contribution marked by the occurrence of SO2, HCl, and HF that are partially scrubbed by a hydrothermal aquifer. The helium isotope ratios (< 3.2) were relatively low compared to those of other active volcanoes in CVZ, possibly due to contamination of the magmatic source by 4He-rich crust and/or crustal fluid addition to the hydrothermal reservoir. Geothermometry in the H2O-CO2-CO-H2-CH4 system suggests equilibrium temperatures of up to 320 °C attained in a vapor phase at redox conditions intermediate between those typical of hydrothermal and magmatic environments. Thermal springs located 12 km northwest of the volcano's summit had outlet temperatures of up to 50.1 °C, neutral to slightly basic pH, and a sodium bicarbonate composition, typical of distal fluid discharges in volcanic systems. Cold springs at the base of the volcanic edifice, showing a calcium sulfate composition, were likely produced by interaction of shallow meteoric water with CO2- and H2S-rich gases. A geochemical conceptual model was constructed to graphically represent these results, which can be used as an indication for future geochemical monitoring and volcanic hazard assessment. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
Full text is not displayed to guests.
FullText Links:
  – Type: pdflink
Text:
  Availability: 1
Header DbId: enr
DbLabel: Energy & Power Source
An: 144745844
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Geochemistry of gas and water discharge from the magmatic-hydrothermal system of Guallatiri volcano, northern Chile.
– Name: Author
  Label: Authors
  Group: Au
  Data: &lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Inostroza%2C+Manuel%22&quot;&gt;Inostroza, Manuel&lt;/searchLink&gt;&lt;relatesTo&gt;1,2&lt;/relatesTo&gt; (AUTHOR)&lt;i&gt; manuel.inostroza@alumnos.ucn.cl&lt;/i&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Tassi%2C+Franco%22&quot;&gt;Tassi, Franco&lt;/searchLink&gt;&lt;relatesTo&gt;3,4&lt;/relatesTo&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Aguilera%2C+Felipe%22&quot;&gt;Aguilera, Felipe&lt;/searchLink&gt;&lt;relatesTo&gt;2,5,6&lt;/relatesTo&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Sep&#250;lveda%2C+Jos&#233;+Pablo%22&quot;&gt;Sep&#250;lveda, Jos&#233; Pablo&lt;/searchLink&gt;&lt;relatesTo&gt;3&lt;/relatesTo&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Capecchiacci%2C+Francesco%22&quot;&gt;Capecchiacci, Francesco&lt;/searchLink&gt;&lt;relatesTo&gt;7&lt;/relatesTo&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Venturi%2C+Stefania%22&quot;&gt;Venturi, Stefania&lt;/searchLink&gt;&lt;relatesTo&gt;3,4&lt;/relatesTo&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Capasso%2C+Giorgio%22&quot;&gt;Capasso, Giorgio&lt;/searchLink&gt;&lt;relatesTo&gt;8&lt;/relatesTo&gt; (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22Bulletin+of+Volcanology%22&quot;&gt;Bulletin of Volcanology&lt;/searchLink&gt;. Jul2020, Vol. 82 Issue 7, p1-16. 16p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Glow+discharges%22&quot;&gt;Glow discharges&lt;/searchLink&gt;&lt;br /&gt;*&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Geochemistry%22&quot;&gt;Geochemistry&lt;/searchLink&gt;&lt;br /&gt;*&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Volcanic+hazard+analysis%22&quot;&gt;Volcanic hazard analysis&lt;/searchLink&gt;&lt;br /&gt;*&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Helium+isotopes%22&quot;&gt;Helium isotopes&lt;/searchLink&gt;&lt;br /&gt;*&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Hot+springs%22&quot;&gt;Hot springs&lt;/searchLink&gt;&lt;br /&gt;*&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Submarine+volcanoes%22&quot;&gt;Submarine volcanoes&lt;/searchLink&gt;
– Name: SubjectGeographic
  Label: Geographic Terms
  Group: Su
  Data: &lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Chile%22&quot;&gt;Chile&lt;/searchLink&gt;
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This work presents the first chemical and isotopic (δ13C-CO2, δ13C-CH4, 3He, 4He, 20Ne, 40Ar, 36Ar, δ18O, and δD) data for fluid discharges from Guallatiri volcano, a remote and massive stratovolcano, which is considered as the second most active volcano of the Central Volcanic Zone (CVZ) in northern Chile. Fumarolic gases had outlet temperatures of between 80.2 and 265 &#176;C, and showed a significant magmatic fluid contribution marked by the occurrence of SO2, HCl, and HF that are partially scrubbed by a hydrothermal aquifer. The helium isotope ratios (&lt; 3.2) were relatively low compared to those of other active volcanoes in CVZ, possibly due to contamination of the magmatic source by 4He-rich crust and/or crustal fluid addition to the hydrothermal reservoir. Geothermometry in the H2O-CO2-CO-H2-CH4 system suggests equilibrium temperatures of up to 320 &#176;C attained in a vapor phase at redox conditions intermediate between those typical of hydrothermal and magmatic environments. Thermal springs located 12 km northwest of the volcano&#39;s summit had outlet temperatures of up to 50.1 &#176;C, neutral to slightly basic pH, and a sodium bicarbonate composition, typical of distal fluid discharges in volcanic systems. Cold springs at the base of the volcanic edifice, showing a calcium sulfate composition, were likely produced by interaction of shallow meteoric water with CO2- and H2S-rich gases. A geochemical conceptual model was constructed to graphically represent these results, which can be used as an indication for future geochemical monitoring and volcanic hazard assessment. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=144745844
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1007/s00445-020-01396-2
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 16
        StartPage: 1
    Subjects:
      – SubjectFull: Glow discharges
        Type: general
      – SubjectFull: Geochemistry
        Type: general
      – SubjectFull: Volcanic hazard analysis
        Type: general
      – SubjectFull: Helium isotopes
        Type: general
      – SubjectFull: Hot springs
        Type: general
      – SubjectFull: Submarine volcanoes
        Type: general
      – SubjectFull: Chile
        Type: general
    Titles:
      – TitleFull: Geochemistry of gas and water discharge from the magmatic-hydrothermal system of Guallatiri volcano, northern Chile.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Inostroza, Manuel
      – PersonEntity:
          Name:
            NameFull: Tassi, Franco
      – PersonEntity:
          Name:
            NameFull: Aguilera, Felipe
      – PersonEntity:
          Name:
            NameFull: Sepúlveda, José Pablo
      – PersonEntity:
          Name:
            NameFull: Capecchiacci, Francesco
      – PersonEntity:
          Name:
            NameFull: Venturi, Stefania
      – PersonEntity:
          Name:
            NameFull: Capasso, Giorgio
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 07
              Text: Jul2020
              Type: published
              Y: 2020
          Identifiers:
            – Type: issn-print
              Value: 02588900
          Numbering:
            – Type: volume
              Value: 82
            – Type: issue
              Value: 7
          Titles:
            – TitleFull: Bulletin of Volcanology
              Type: main
ResultId 1