ChansonRolandV7, Main, Exploration, bibRecord, 000F66

The thermal springs of Aachen/Germany : what Charlemagne didn't know

Identifieur interne : 000F66 ( Main/Exploration ); précédent : 000F65; suivant : 000F67

The thermal springs of Aachen/Germany : what Charlemagne didn't know

Auteurs : A. Herch [Allemagne]

Source :

Environmental geology : (Berlin) [ 0943-0105 ] ; 2000.

RBID : Pascal:00-0236246

Descripteurs français

Pascal (Inist)
- Allemagne, Massif Schisteux Rhénan, Eau souterraine, Hydrochimie, Source thermale, Evaporite, Gradient géothermique, Circulation thermique, Grès, Silt, Shale, Temps résidence, Concentration, Dévonien sup, Calcaire, Interaction fluide roche, Analyse éléments traces, Conductivité électrique, S 34-S 32, Eau pluie, Température, Sodium, Chlorure, Sulfate.
Wicri :
- geographic : Allemagne.
- topic : Eau souterraine, Sodium.

English descriptors

KwdEn :
- Germany, Rhenish Schiefergebirge, S-34/S-32, Upper Devonian, chlorides, concentration, electrical conductivity, evaporites, fluid-rock interaction, geothermal gradient, ground water, hot springs, hydrochemistry, limestone, rain water, residence time, sandstone, shale, silt, sodium, sulfates, temperature, thermal circulation, trace-element analyses.

Abstract

The Aachen hot springs flow out from Upper Devonian limestones at the Variscan thrust front of the Rhenish Massif. Hydrogeochemical analyses were used to determine the origin of the water and show that sodium, chloride, and sulfate originate from dissolving evaporites that are influenced by meteoric groundwater. The circulation depths of the Aachen thermal water is estimated to be >3500 m using SiO₂-geothermometry and the regional geothermal gradient of about 30°C/km. The deep circulation in Paleozoic sandstones, silt-stones and shales and a considerable residence time allow rock water reactions which explain the concentrations of Ba, Sr, F and Si. While the thermal water rises into Upper Devonian limestones carbonates are dissolved. Cooler fresh water from the vicinity contributes to the thermal aquifer depending on the pressure head of the springs. Sulfate reduction coupled with methane oxidation can be observed as soon as the water temperature is below 65 °C.

Affiliations:

Allemagne

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to stream PascalFrancis, to step Curation: 000000
to stream PascalFrancis, to step Checkpoint: 000117
to stream Main, to step Merge: 000F77
to stream Main, to step Curation: 000F66

Le document en format XML

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<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Friedrich Schiller University, Department of Geoscience, Burgweg 11</s1>
<s2>07749 Jena</s2>
<s3>DEU</s3>
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<country>Allemagne</country>
<wicri:noRegion>07749 Jena</wicri:noRegion>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Germany</term>
<term>Rhenish Schiefergebirge</term>
<term>S-34/S-32</term>
<term>Upper Devonian</term>
<term>chlorides</term>
<term>concentration</term>
<term>electrical conductivity</term>
<term>evaporites</term>
<term>fluid-rock interaction</term>
<term>geothermal gradient</term>
<term>ground water</term>
<term>hot springs</term>
<term>hydrochemistry</term>
<term>limestone</term>
<term>rain water</term>
<term>residence time</term>
<term>sandstone</term>
<term>shale</term>
<term>silt</term>
<term>sodium</term>
<term>sulfates</term>
<term>temperature</term>
<term>thermal circulation</term>
<term>trace-element analyses</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Allemagne</term>
<term>Massif Schisteux Rhénan</term>
<term>Eau souterraine</term>
<term>Hydrochimie</term>
<term>Source thermale</term>
<term>Evaporite</term>
<term>Gradient géothermique</term>
<term>Circulation thermique</term>
<term>Grès</term>
<term>Silt</term>
<term>Shale</term>
<term>Temps résidence</term>
<term>Concentration</term>
<term>Dévonien sup</term>
<term>Calcaire</term>
<term>Interaction fluide roche</term>
<term>Analyse éléments traces</term>
<term>Conductivité électrique</term>
<term>S 34-S 32</term>
<term>Eau pluie</term>
<term>Température</term>
<term>Sodium</term>
<term>Chlorure</term>
<term>Sulfate</term>
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<keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Allemagne</term>
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<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Eau souterraine</term>
<term>Sodium</term>
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<front><div type="abstract" xml:lang="en">The Aachen hot springs flow out from Upper Devonian limestones at the Variscan thrust front of the Rhenish Massif. Hydrogeochemical analyses were used to determine the origin of the water and show that sodium, chloride, and sulfate originate from dissolving evaporites that are influenced by meteoric groundwater. The circulation depths of the Aachen thermal water is estimated to be >3500 m using SiO<sub>2</sub>
-geothermometry and the regional geothermal gradient of about 30°C/km. The deep circulation in Paleozoic sandstones, silt-stones and shales and a considerable residence time allow rock water reactions which explain the concentrations of Ba, Sr, F and Si. While the thermal water rises into Upper Devonian limestones carbonates are dissolved. Cooler fresh water from the vicinity contributes to the thermal aquifer depending on the pressure head of the springs. Sulfate reduction coupled with methane oxidation can be observed as soon as the water temperature is below 65 °C.</div>
</front>
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<affiliations><list><country><li>Allemagne</li>
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<tree><country name="Allemagne"><noRegion><name sortKey="Herch, A" sort="Herch, A" uniqKey="Herch A" first="A." last="Herch">A. Herch</name>
</noRegion>
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The thermal springs of Aachen/Germany : what Charlemagne didn't know

The thermal springs of Aachen/Germany : what Charlemagne didn't know

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