NissirosV1, Main, Exploration, bibRecord, 000147

Unrest at Campi Flegrei: A contribution to the magmatic versus hydrothermal debate from inverse and finite element modeling

Identifieur interne : 000147 ( Main/Exploration ); précédent : 000146; suivant : 000148

Unrest at Campi Flegrei: A contribution to the magmatic versus hydrothermal debate from inverse and finite element modeling

Auteurs : J. Gottsmann [Espagne, Royaume-Uni] ; A. Folch [Espagne] ; H. Rymer [Royaume-Uni]

Source :

Journal of Geophysical Research: Solid Earth [ 0148-0227 ] ; 2006-07.

RBID : ISTEX:02B7158D8DB45D5E996DDDEAAA967D9500F4A7A5

Descripteurs français

Wicri :
- topic : Déflation, Sciences de la terre, Inflation.

English descriptors

Abstract

We present results from the modeling of ground deformation and microgravimetric data recorded at Campi Flegrei in order to assess the causative phenomena of caldera unrest between 1981 and 2001. We find that residual gravity changes during ground uplift (1982–1984) are indicative of mass changes in a hybrid of magmatic and hydrothermal sources. During deflation between 1985 and 2001, the inversion of gravity residuals for a single source does not provide convincing results. We then performed the joint inversion of gravity and deformation data for multiple spherical sources and refined source parameters by finite element modeling in order to mitigate against limitations of the analytical solutions. The data recorded during inflation and rapid deflation may be best explained by mass and pressure changes in a deep magmatic source at about 5 km depth and a shallow (2 km deep) hydrothermal source. Both sources contribute equally to the gravity changes observed between 1982 and 1984; the contemporary uplift appears to be mainly caused by the shallow source. The subsequent deflation is dominated by a pressure decrease in the hydrothermal source; the magmatic source contributes chiefly to the observed gravity changes. Pressure and density variations within multiple shallow‐seated hydrothermal sources provide acceptable fits to the deflation and accompanying gravity changes recorded since 1988. These shallow level dynamics also appear to trigger spatially and temporarily random short‐term reversals of the overall mode of ground subsidence since 1985. Our analysis does not support the idea of magmatic contributions to these short‐lived periods of inflation.

Url:

https://api.istex.fr/document/02B7158D8DB45D5E996DDDEAAA967D9500F4A7A5/fulltext/pdf

DOI: 10.1029/2005JB003745

Affiliations:

Links toward previous steps (curation, corpus...)

to stream Istex, to step Corpus: 000383
to stream Istex, to step Curation: 000383
to stream Istex, to step Checkpoint: 000099
to stream Main, to step Merge: 000148
to stream Main, to step Curation: 000147

Le document en format XML

<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Unrest at Campi Flegrei: A contribution to the magmatic versus hydrothermal debate from inverse and finite element modeling</title>
<author><name sortKey="Gottsmann, J" sort="Gottsmann, J" uniqKey="Gottsmann J" first="J." last="Gottsmann">J. Gottsmann</name>
</author>
<author><name sortKey="Folch, A" sort="Folch, A" uniqKey="Folch A" first="A." last="Folch">A. Folch</name>
</author>
<author><name sortKey="Rymer, H" sort="Rymer, H" uniqKey="Rymer H" first="H." last="Rymer">H. Rymer</name>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">ISTEX</idno>
<idno type="RBID">ISTEX:02B7158D8DB45D5E996DDDEAAA967D9500F4A7A5</idno>
<date when="2006" year="2006">2006</date>
<idno type="doi">10.1029/2005JB003745</idno>
<idno type="url">https://api.istex.fr/document/02B7158D8DB45D5E996DDDEAAA967D9500F4A7A5/fulltext/pdf</idno>
<idno type="wicri:Area/Istex/Corpus">000383</idno>
<idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000383</idno>
<idno type="wicri:Area/Istex/Curation">000383</idno>
<idno type="wicri:Area/Istex/Checkpoint">000099</idno>
<idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000099</idno>
<idno type="wicri:doubleKey">0148-0227:2006:Gottsmann J:unrest:at:campi</idno>
<idno type="wicri:Area/Main/Merge">000148</idno>
<idno type="wicri:Area/Main/Curation">000147</idno>
<idno type="wicri:Area/Main/Exploration">000147</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title level="a" type="main">Unrest at Campi Flegrei: A contribution to the magmatic versus hydrothermal debate from inverse and finite element modeling</title>
<author><name sortKey="Gottsmann, J" sort="Gottsmann, J" uniqKey="Gottsmann J" first="J." last="Gottsmann">J. Gottsmann</name>
<affiliation wicri:level="3"><country xml:lang="fr">Espagne</country>
<wicri:regionArea>Institute of Earth Sciences Jaume Almera, CSIC, Lluís SoléSabarís s/n, Barcelona</wicri:regionArea>
<placeName><settlement type="city">Barcelone</settlement>
<region nuts="2" type="region">Catalogne</region>
</placeName>
</affiliation>
<affiliation wicri:level="1"><country xml:lang="fr" wicri:curation="lc">Royaume-Uni</country>
<wicri:regionArea>Now at Department of Earth Sciences, Wills Memorial Building, University of Bristol, Bristol</wicri:regionArea>
<wicri:noRegion>Bristol</wicri:noRegion>
</affiliation>
<affiliation wicri:level="1"><country wicri:rule="url">Royaume-Uni</country>
</affiliation>
</author>
<author><name sortKey="Folch, A" sort="Folch, A" uniqKey="Folch A" first="A." last="Folch">A. Folch</name>
<affiliation wicri:level="3"><country xml:lang="fr">Espagne</country>
<wicri:regionArea>Institute of Earth Sciences Jaume Almera, CSIC, Lluís SoléSabarís s/n, Barcelona</wicri:regionArea>
<placeName><settlement type="city">Barcelone</settlement>
<region nuts="2" type="region">Catalogne</region>
</placeName>
</affiliation>
</author>
<author><name sortKey="Rymer, H" sort="Rymer, H" uniqKey="Rymer H" first="H." last="Rymer">H. Rymer</name>
<affiliation wicri:level="1"><country xml:lang="fr">Royaume-Uni</country>
<wicri:regionArea>Department of Earth Sciences, The Open University, Walton Hall, Milton Keynes</wicri:regionArea>
<wicri:noRegion>Milton Keynes</wicri:noRegion>
</affiliation>
</author>
</analytic>
<monogr></monogr>
<series><title level="j" type="main">Journal of Geophysical Research: Solid Earth</title>
<title level="j" type="alt">JOURNAL OF GEOPHYSICAL RESEARCH: SOLID EARTH</title>
<idno type="ISSN">0148-0227</idno>
<idno type="eISSN">2156-2202</idno>
<imprint><biblScope unit="vol">111</biblScope>
<biblScope unit="issue">B7</biblScope>
<biblScope unit="page-count">11</biblScope>
<date type="published" when="2006-07">2006-07</date>
</imprint>
<idno type="ISSN">0148-0227</idno>
</series>
</biblStruct>
</sourceDesc>
<seriesStmt><idno type="ISSN">0148-0227</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Analytical solutions</term>
<term>Benchmark</term>
<term>Berrino</term>
<term>Caldera</term>
<term>Caldera unrest</term>
<term>Campi</term>
<term>Campi flegrei</term>
<term>Campi flegrei caldera</term>
<term>Confidence bounds</term>
<term>Deep source</term>
<term>Deflation</term>
<term>Deformation</term>
<term>Deformation data</term>
<term>Dgobs</term>
<term>Earth sciences</term>
<term>Fernandez</term>
<term>Finite element modeling</term>
<term>Flegrei</term>
<term>Folch</term>
<term>Free surface</term>
<term>Geophys</term>
<term>Geotherm</term>
<term>Gottsmann</term>
<term>Gravity</term>
<term>Gravity changes</term>
<term>Gravity data</term>
<term>Gravity fields</term>
<term>Gravity residuals</term>
<term>Ground deformation</term>
<term>Hazard assessment</term>
<term>Hydrothermal</term>
<term>Hydrothermal source</term>
<term>Inflation</term>
<term>Inflation data</term>
<term>Inverse problem</term>
<term>Inversion</term>
<term>Joint inversion</term>
<term>Long valley caldera</term>
<term>Magmatic</term>
<term>Magmatic source</term>
<term>Mgal</term>
<term>Model parameters</term>
<term>Modeling</term>
<term>Mogi</term>
<term>Mogi model</term>
<term>Multiple sources</term>
<term>Numerical solutions</term>
<term>Phlegrean fields</term>
<term>Pressure change</term>
<term>Pressure changes</term>
<term>Pressure decrease</term>
<term>Pressure decreases</term>
<term>Pressure increase</term>
<term>Prolate</term>
<term>Prolate spheroid source</term>
<term>Rapid deflation</term>
<term>Relative contribution</term>
<term>Residual</term>
<term>Residual gravity change</term>
<term>Residual gravity changes</term>
<term>Residual gravity mgal</term>
<term>Sbrana</term>
<term>Scenario</term>
<term>Separate inversion</term>
<term>Shallow hydrothermal systems</term>
<term>Shallow source</term>
<term>Single source</term>
<term>Slow deflation</term>
<term>Source density</term>
<term>Source parameters</term>
<term>Source pressure changes</term>
<term>Source radii</term>
<term>Source radius</term>
<term>Spherical sources</term>
<term>Spheroid</term>
<term>Spheroid source</term>
<term>Subsurface</term>
<term>Unrest</term>
<term>Uplift</term>
<term>Upper surface</term>
<term>Vertical displacements</term>
<term>Volcanol</term>
<term>Volume change</term>
</keywords>
<keywords scheme="Teeft" xml:lang="en"><term>Analytical solutions</term>
<term>Benchmark</term>
<term>Berrino</term>
<term>Caldera</term>
<term>Caldera unrest</term>
<term>Campi</term>
<term>Campi flegrei</term>
<term>Campi flegrei caldera</term>
<term>Confidence bounds</term>
<term>Deep source</term>
<term>Deflation</term>
<term>Deformation</term>
<term>Deformation data</term>
<term>Dgobs</term>
<term>Earth sciences</term>
<term>Fernandez</term>
<term>Finite element modeling</term>
<term>Flegrei</term>
<term>Folch</term>
<term>Free surface</term>
<term>Geophys</term>
<term>Geotherm</term>
<term>Gottsmann</term>
<term>Gravity</term>
<term>Gravity changes</term>
<term>Gravity data</term>
<term>Gravity fields</term>
<term>Gravity residuals</term>
<term>Ground deformation</term>
<term>Hazard assessment</term>
<term>Hydrothermal</term>
<term>Hydrothermal source</term>
<term>Inflation</term>
<term>Inflation data</term>
<term>Inverse problem</term>
<term>Inversion</term>
<term>Joint inversion</term>
<term>Long valley caldera</term>
<term>Magmatic</term>
<term>Magmatic source</term>
<term>Mgal</term>
<term>Model parameters</term>
<term>Modeling</term>
<term>Mogi</term>
<term>Mogi model</term>
<term>Multiple sources</term>
<term>Numerical solutions</term>
<term>Phlegrean fields</term>
<term>Pressure change</term>
<term>Pressure changes</term>
<term>Pressure decrease</term>
<term>Pressure decreases</term>
<term>Pressure increase</term>
<term>Prolate</term>
<term>Prolate spheroid source</term>
<term>Rapid deflation</term>
<term>Relative contribution</term>
<term>Residual</term>
<term>Residual gravity change</term>
<term>Residual gravity changes</term>
<term>Residual gravity mgal</term>
<term>Sbrana</term>
<term>Scenario</term>
<term>Separate inversion</term>
<term>Shallow hydrothermal systems</term>
<term>Shallow source</term>
<term>Single source</term>
<term>Slow deflation</term>
<term>Source density</term>
<term>Source parameters</term>
<term>Source pressure changes</term>
<term>Source radii</term>
<term>Source radius</term>
<term>Spherical sources</term>
<term>Spheroid</term>
<term>Spheroid source</term>
<term>Subsurface</term>
<term>Unrest</term>
<term>Uplift</term>
<term>Upper surface</term>
<term>Vertical displacements</term>
<term>Volcanol</term>
<term>Volume change</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Déflation</term>
<term>Sciences de la terre</term>
<term>Inflation</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract">We present results from the modeling of ground deformation and microgravimetric data recorded at Campi Flegrei in order to assess the causative phenomena of caldera unrest between 1981 and 2001. We find that residual gravity changes during ground uplift (1982–1984) are indicative of mass changes in a hybrid of magmatic and hydrothermal sources. During deflation between 1985 and 2001, the inversion of gravity residuals for a single source does not provide convincing results. We then performed the joint inversion of gravity and deformation data for multiple spherical sources and refined source parameters by finite element modeling in order to mitigate against limitations of the analytical solutions. The data recorded during inflation and rapid deflation may be best explained by mass and pressure changes in a deep magmatic source at about 5 km depth and a shallow (2 km deep) hydrothermal source. Both sources contribute equally to the gravity changes observed between 1982 and 1984; the contemporary uplift appears to be mainly caused by the shallow source. The subsequent deflation is dominated by a pressure decrease in the hydrothermal source; the magmatic source contributes chiefly to the observed gravity changes. Pressure and density variations within multiple shallow‐seated hydrothermal sources provide acceptable fits to the deflation and accompanying gravity changes recorded since 1988. These shallow level dynamics also appear to trigger spatially and temporarily random short‐term reversals of the overall mode of ground subsidence since 1985. Our analysis does not support the idea of magmatic contributions to these short‐lived periods of inflation.</div>
</front>
</TEI>
<affiliations><list><country><li>Espagne</li>
<li>Royaume-Uni</li>
</country>
<region><li>Catalogne</li>
</region>
<settlement><li>Barcelone</li>
</settlement>
</list>
<tree><country name="Espagne"><region name="Catalogne"><name sortKey="Gottsmann, J" sort="Gottsmann, J" uniqKey="Gottsmann J" first="J." last="Gottsmann">J. Gottsmann</name>
</region>
<name sortKey="Folch, A" sort="Folch, A" uniqKey="Folch A" first="A." last="Folch">A. Folch</name>
</country>
<country name="Royaume-Uni"><noRegion><name sortKey="Gottsmann, J" sort="Gottsmann, J" uniqKey="Gottsmann J" first="J." last="Gottsmann">J. Gottsmann</name>
</noRegion>
<name sortKey="Gottsmann, J" sort="Gottsmann, J" uniqKey="Gottsmann J" first="J." last="Gottsmann">J. Gottsmann</name>
<name sortKey="Rymer, H" sort="Rymer, H" uniqKey="Rymer H" first="H." last="Rymer">H. Rymer</name>
</country>
</tree>
</affiliations>
</record>

Pour manipuler ce document sous Unix (Dilib)

EXPLOR_STEP=$WICRI_ROOT/Wicri/Terre/explor/NissirosV1/Data/Main/Exploration

HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000147 | SxmlIndent | more

HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 000147 | SxmlIndent | more

Pour mettre un lien sur cette page dans le réseau Wicri

{{Explor lien
   |wiki=    Wicri/Terre
   |area=    NissirosV1
   |flux=    Main
   |étape=   Exploration
   |type=    RBID
   |clé=     ISTEX:02B7158D8DB45D5E996DDDEAAA967D9500F4A7A5
   |texte=   Unrest at Campi Flegrei: A contribution to the magmatic versus hydrothermal debate from inverse and finite element modeling
}}

This area was generated with Dilib version V0.6.33.
Data generation: Tue Jan 16 00:18:27 2018. Site generation: Mon Feb 1 22:09:13 2021

	Serveur d'exploration Nissiros
	Attention, ce site est en cours de développement ! Attention, site généré par des moyens informatiques à partir de corpus bruts. Les informations ne sont donc pas validées.

Serveur d'exploration Nissiros

Unrest at Campi Flegrei: A contribution to the magmatic versus hydrothermal debate from inverse and finite element modeling

Unrest at Campi Flegrei: A contribution to the magmatic versus hydrothermal debate from inverse and finite element modeling

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri