On the interpretation of gravity variations in the presence of active hydrothermal systems: Insights from the Nisyros Caldera, Greece
Identifieur interne : 000010 ( Istex/Corpus ); précédent : 000009; suivant : 000011On the interpretation of gravity variations in the presence of active hydrothermal systems: Insights from the Nisyros Caldera, Greece
Auteurs : J. Gottsmann ; H. Rymer ; L. K. WoollerSource :
- Geophysical Research Letters [ 0094-8276 ] ; 2005-12.
English descriptors
- KwdEn :
- Active hydrothermal systems, Benchmark, Berrino, Caldera, Caldera floor, Caldera unrest, Caliro, Campi, Campi flegrei, Campi flegrei caldera, Degassing, Earth sciences, Elevation changes, Flegrei, Geophys, Gottsmann, Gravity, Gravity change time series, Gravity changes, Gravity variations, Ground deformation, Hydrothermal, Hydrothermal area, Magmatic, Mgal, Microgravity surveys, Milton keynes, Nisyros, Nisyros caldera, Open university, Residual, Residual gravity changes, Rymer, Sampling interval, Steam pockets, Stefanos crater, Time series, Volcanol.
- Teeft :
- Active hydrothermal systems, Benchmark, Berrino, Caldera, Caldera floor, Caldera unrest, Caliro, Campi, Campi flegrei, Campi flegrei caldera, Degassing, Earth sciences, Elevation changes, Flegrei, Geophys, Gottsmann, Gravity, Gravity change time series, Gravity changes, Gravity variations, Ground deformation, Hydrothermal, Hydrothermal area, Magmatic, Mgal, Microgravity surveys, Milton keynes, Nisyros, Nisyros caldera, Open university, Residual, Residual gravity changes, Rymer, Sampling interval, Steam pockets, Stefanos crater, Time series, Volcanol.
Abstract
We report on short‐term (over tens of minutes) residual gravity changes recorded at the restless Nisyros caldera in Greece via a series of discrete measurements at benchmarks within or in proximity to a hydrothermal area located along the caldera floor. The obtained time series reveal sinusoidal gravity variations with amplitudes of up to 25 μGal and wavelengths of 40–50 min. Degassing of a magmatic source coupling into (shallow) hydrothermal systems including the ascent of steam pockets and transient pressure variations during steam/liquid interface propagation appear to be the most likely causative process for the observed short‐term variations. We assess standard protocols of microgravity surveys for hazard assessment in volcanic areas in the light of these findings and propose additional techniques, such as continuous gravimetry, for the discrimination of hydrothermal signals from deeper‐seated, i.e. magmatic, signals during gravity monitoring of restless volcanoes hosting active hydrothermal systems.
Url:
DOI: 10.1029/2005GL024061
Links to Exploration step
ISTEX:95308CEE15508AB96F516F362DDB419AB83A30D2Le document en format XML
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The obtained time series reveal sinusoidal gravity variations with amplitudes of up to 25 μGal and wavelengths of 40–50 min. Degassing of a magmatic source coupling into (shallow) hydrothermal systems including the ascent of steam pockets and transient pressure variations during steam/liquid interface propagation appear to be the most likely causative process for the observed short‐term variations. We assess standard protocols of microgravity surveys for hazard assessment in volcanic areas in the light of these findings and propose additional techniques, such as continuous gravimetry, for the discrimination of hydrothermal signals from deeper‐seated, i.e. magmatic, signals during gravity monitoring of restless volcanoes hosting active hydrothermal systems.</div></front></TEI><istex><corpusName>wiley</corpusName><keywords><teeft><json:string>caldera</json:string><json:string>hydrothermal</json:string><json:string>nisyros</json:string><json:string>benchmark</json:string><json:string>gottsmann</json:string><json:string>rymer</json:string><json:string>gravity changes</json:string><json:string>caliro</json:string><json:string>mgal</json:string><json:string>volcanol</json:string><json:string>flegrei</json:string><json:string>campi</json:string><json:string>degassing</json:string><json:string>gravity variations</json:string><json:string>berrino</json:string><json:string>geophys</json:string><json:string>magmatic</json:string><json:string>nisyros caldera</json:string><json:string>residual</json:string><json:string>gravity</json:string><json:string>time series</json:string><json:string>microgravity surveys</json:string><json:string>hydrothermal area</json:string><json:string>campi flegrei</json:string><json:string>elevation changes</json:string><json:string>campi flegrei caldera</json:string><json:string>active hydrothermal systems</json:string><json:string>caldera floor</json:string><json:string>open university</json:string><json:string>steam pockets</json:string><json:string>earth sciences</json:string><json:string>gravity change time series</json:string><json:string>caldera unrest</json:string><json:string>ground deformation</json:string><json:string>sampling interval</json:string><json:string>residual gravity changes</json:string><json:string>milton keynes</json:string><json:string>stefanos crater</json:string></teeft></keywords><author><json:item><name>J. 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The obtained time series reveal sinusoidal gravity variations with amplitudes of up to 25 μGal and wavelengths of 40–50 min. Degassing of a magmatic source coupling into (shallow) hydrothermal systems including the ascent of steam pockets and transient pressure variations during steam/liquid interface propagation appear to be the most likely causative process for the observed short‐term variations. We assess standard protocols of microgravity surveys for hazard assessment in volcanic areas in the light of these findings and propose additional techniques, such as continuous gravimetry, for the discrimination of hydrothermal signals from deeper‐seated, i.e. magmatic, signals during gravity monitoring of restless volcanoes hosting active hydrothermal systems.</abstract><qualityIndicators><score>4.56</score><pdfVersion>1.3</pdfVersion><pdfPageSize>592 x 807 pts</pdfPageSize><refBibsNative>true</refBibsNative><abstractCharCount>1020</abstractCharCount><pdfWordCount>2820</pdfWordCount><pdfCharCount>17858</pdfCharCount><pdfPageCount>4</pdfPageCount><abstractWordCount>145</abstractWordCount></qualityIndicators><title>On the interpretation of gravity variations in the presence of active hydrothermal systems: Insights from the Nisyros Caldera, Greece</title><genre><json:string>article</json:string></genre><host><title>Geophysical Research 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type="first">J.</forename><surname>Gottsmann</surname></persName><email>jgottsmann@ija.csic.es</email><affiliation><orgName>Institute of Earth Sciences “Jaume Almera,” CSIC</orgName><address><settlement type="city">Barcelona</settlement><country key="ES">Spain</country></address></affiliation></author><author xml:id="author-0001"><persName><forename type="first">H.</forename><surname>Rymer</surname></persName><affiliation><orgName>Department of Earth Sciences</orgName><orgName>Open University</orgName><address><settlement type="city">Milton Keynes</settlement><country key="GB">UK</country></address></affiliation></author><author xml:id="author-0002"><persName><forename type="first">L. 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The obtained time series reveal sinusoidal gravity variations with amplitudes of up to 25 μGal and wavelengths of 40–50 min. Degassing of a magmatic source coupling into (shallow) hydrothermal systems including the ascent of steam pockets and transient pressure variations during steam/liquid interface propagation appear to be the most likely causative process for the observed short‐term variations. We assess standard protocols of microgravity surveys for hazard assessment in volcanic areas in the light of these findings and propose additional techniques, such as continuous gravimetry, for the discrimination of hydrothermal signals from deeper‐seated, i.e. magmatic, signals during gravity monitoring of restless volcanoes hosting active hydrothermal systems.</p></abstract><textClass><classCode scheme="http://psi.agu.org/taxonomy5/0400">BIOGEOSCIENCES</classCode><classCode scheme="http://psi.agu.org/taxonomy5/1000">GEOCHEMISTRY</classCode><classCode scheme="http://psi.agu.org/taxonomy5/1200">GEODESY AND GRAVITY</classCode><classCode scheme="http://psi.agu.org/taxonomy5/3000">MARINE GEOLOGY AND GEOPHYSICS</classCode><classCode scheme="http://psi.agu.org/taxonomy5/3600">MINERALOGY AND PETROLOGY</classCode><classCode scheme="http://psi.agu.org/taxonomy5/4300">NATURAL HAZARDS</classCode><classCode scheme="http://psi.agu.org/taxonomy5/4800">OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL</classCode><classCode scheme="http://psi.agu.org/taxonomy5/7200">SEISMOLOGY</classCode><classCode scheme="http://psi.agu.org/taxonomy5/8100">TECTONOPHYSICS</classCode><classCode scheme="http://psi.agu.org/taxonomy5/8400">VOLCANOLOGY</classCode><classCode scheme="articleCategory">Solid Earth</classCode><classCode scheme="tocHeading1">Solid Earth</classCode></textClass><langUsage><language ident="EN"></language></langUsage></profileDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/95308CEE15508AB96F516F362DDB419AB83A30D2/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component type="serialArticle" version="2.0" xml:lang="en" xml:id="grl20449"><header><publicationMeta level="product"><doi>10.1002/(ISSN)1944-8007</doi><issn type="print">0094-8276</issn><issn type="electronic">1944-8007</issn><idGroup><id type="product" value="GRL"></id><id type="coden" value="GPRLAJ"></id></idGroup><titleGroup><title type="main" xml:lang="en" sort="GEOPHYSICAL RESEARCH LETTERS">Geophysical Research Letters</title><title type="short">Geophys. 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K.</givenNames> <familyName>Wooller</familyName></author> (<pubYear year="2005">2005</pubYear>), <articleTitle>On the interpretation of gravity variations in the presence of active hydrothermal systems: Insights from the Nisyros Caldera, Greece</articleTitle>, <journalTitle>Geophys. Res. Lett.</journalTitle>, <vol>32</vol>, L23310, doi:<accessionId ref="info:doi/10.1029/2005GL024061">10.1029/2005GL024061</accessionId>.</citation></selfCitationGroup><linkGroup><link type="toTypesetVersion" href="file:GRL.GRL20449.pdf"></link></linkGroup></publicationMeta><contentMeta><countGroup><count type="figureTotal" number="3"></count></countGroup><titleGroup><title type="main">On the interpretation of gravity variations in the presence of active hydrothermal systems: Insights from the Nisyros Caldera, Greece</title><title type="short">GRAVITY CHANGES AT NISYROS CALDERA</title><title type="shortAuthors">Gottsmann <i>et al</i>.</title></titleGroup><creators><creator creatorRole="author" xml:id="grl20449-cr-0001" affiliationRef="#grl20449-aff-0001"><personName><givenNames>J.</givenNames> <familyName>Gottsmann</familyName></personName><contactDetails><email normalForm="jgottsmann@ija.csic.es">jgottsmann@ija.csic.es</email></contactDetails></creator><creator creatorRole="author" xml:id="grl20449-cr-0002" affiliationRef="#grl20449-aff-0002"><personName><givenNames>H.</givenNames> <familyName>Rymer</familyName></personName></creator><creator creatorRole="author" xml:id="grl20449-cr-0003" affiliationRef="#grl20449-aff-0002"><personName><givenNames>L. K.</givenNames> <familyName>Wooller</familyName></personName></creator></creators><affiliationGroup><affiliation countryCode="ES" type="organization" xml:id="grl20449-aff-0001"><orgName>Institute of Earth Sciences “Jaume Almera,” CSIC</orgName><address><city>Barcelona</city><country>Spain</country></address></affiliation><affiliation countryCode="GB" type="organization" xml:id="grl20449-aff-0002"><orgDiv>Department of Earth Sciences</orgDiv><orgName>Open University</orgName><address><city>Milton Keynes</city><country>UK</country></address></affiliation></affiliationGroup><abstractGroup><abstract type="main"><p xml:id="grl20449-para-0001" label="1">We report on short‐term (over tens of minutes) residual gravity changes recorded at the restless Nisyros caldera in Greece via a series of discrete measurements at benchmarks within or in proximity to a hydrothermal area located along the caldera floor. The obtained time series reveal sinusoidal gravity variations with amplitudes of up to 25 μGal and wavelengths of 40–50 min. Degassing of a magmatic source coupling into (shallow) hydrothermal systems including the ascent of steam pockets and transient pressure variations during steam/liquid interface propagation appear to be the most likely causative process for the observed short‐term variations. We assess standard protocols of microgravity surveys for hazard assessment in volcanic areas in the light of these findings and propose additional techniques, such as continuous gravimetry, for the discrimination of hydrothermal signals from deeper‐seated, i.e. magmatic, signals during gravity monitoring of restless volcanoes hosting active hydrothermal systems.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>On the interpretation of gravity variations in the presence of active hydrothermal systems: Insights from the Nisyros Caldera, Greece</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>GRAVITY CHANGES AT NISYROS CALDERA</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>On the interpretation of gravity variations in the presence of active hydrothermal systems: Insights from the Nisyros Caldera, Greece</title></titleInfo><name type="personal"><namePart type="given">J.</namePart><namePart type="family">Gottsmann</namePart><affiliation>Institute of Earth Sciences “Jaume Almera,” CSIC, Barcelona, Spain</affiliation><affiliation>E-mail: jgottsmann@ija.csic.es</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">H.</namePart><namePart type="family">Rymer</namePart><affiliation>Department of Earth Sciences, Open University, Milton Keynes, UK</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">L. 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Lett., 32, L23310, doi:10.1029/2005GL024061.</edition><copyrightDate encoding="w3cdtf">2005</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">3</extent></physicalDescription><abstract>We report on short‐term (over tens of minutes) residual gravity changes recorded at the restless Nisyros caldera in Greece via a series of discrete measurements at benchmarks within or in proximity to a hydrothermal area located along the caldera floor. The obtained time series reveal sinusoidal gravity variations with amplitudes of up to 25 μGal and wavelengths of 40–50 min. Degassing of a magmatic source coupling into (shallow) hydrothermal systems including the ascent of steam pockets and transient pressure variations during steam/liquid interface propagation appear to be the most likely causative process for the observed short‐term variations. We assess standard protocols of microgravity surveys for hazard assessment in volcanic areas in the light of these findings and propose additional techniques, such as continuous gravimetry, for the discrimination of hydrothermal signals from deeper‐seated, i.e. magmatic, signals during gravity monitoring of restless volcanoes hosting active hydrothermal systems.</abstract><relatedItem type="host"><titleInfo><title>Geophysical Research Letters</title></titleInfo><titleInfo type="abbreviated"><title>Geophys. Res. 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