Deep seismic reflection profile DEKORP 1987-1A across the western Rhenish Massif, West Germany/ East Belgium

Stiller, Manfred; Kaerger, Lauretta; Agafonova, Tatiana; Krawczyk, Coleman; Oncken, Onno; Weber, Michael

doi:10.5880/gfz.dekorp-1a.001

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“…All these faults could be connected at several kilometers in-depth to the Midi-Eifel thrust fault, a major thrust fault corresponding to the northernmost front of the Variscian Orogeny and connecting both regions. This fault acts as an important seismic reflector and could thus be observed below the Stavelot Massif thanks to seismic measurements surveys lead by the DEKORP research group in the early nineties (Stiller et al 1987).…”

Section: Discussionmentioning

confidence: 99%

CO₂/³He ratios reveal the presence of mantle gas in the CO₂-rich groundwaters of the Ardenne massif (Spa, Belgium)

Defourny

Blard

Zimmermann

et al. 2022

Preprint

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Abstract. Natural CO2-rich groundwaters of eastern Belgium have been known for centuries although the exact origin of the gas they contained was still unclear. This paper presents the results of a sampling campaign in the area (Spa, Stoumont, Malmedy) where 30 samples of both carbogazeous and non-carbogazeous groundwaters have been analyzed for major elements, CO2 content and carbon isotopic composition. Among them, 13 samples were analyzed for 3He / 4He and 4He / 20Ne ratios. The combination of δ13C and 3He / CO2 ratios have shown with a high level of confidence that the CO2 in groundwater from springs and boreholes has a mantellic origin, and can very likely be attributed to the degassing of the neighboring and still buoyant Eifel mantle plume, located at a distance of 100 km eastwards. The identity and nature of the deep-rooted fractures that act as CO2 transport pathway to the surface are still to be clarified, but several major thrust faults exist in the Rhenish Massif and could connect the Eifel volcanic field with the studied area.

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Section: Discussionmentioning

confidence: 99%

CO₂/³He ratios reveal the presence of mantle gas in the CO₂-rich groundwaters of the Ardenne massif (Spa, Belgium)

Defourny

Blard

Zimmermann

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

Deep seismic reflection profile DEKORP 1987-1A across the western Rhenish Massif, West Germany/ East Belgium

Cited by 1 publication

References 23 publications

CO₂/³He ratios reveal the presence of mantle gas in the CO₂-rich groundwaters of the Ardenne massif (Spa, Belgium)

CO₂/³He ratios reveal the presence of mantle gas in the CO₂-rich groundwaters of the Ardenne massif (Spa, Belgium)

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Deep seismic reflection profile DEKORP 1987-1A across the western Rhenish Massif, West Germany/ East Belgium

Cited by 1 publication

References 23 publications

CO2/3He ratios reveal the presence of mantle gas in the CO2-rich groundwaters of the Ardenne massif (Spa, Belgium)

CO2/3He ratios reveal the presence of mantle gas in the CO2-rich groundwaters of the Ardenne massif (Spa, Belgium)

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CO₂/³He ratios reveal the presence of mantle gas in the CO₂-rich groundwaters of the Ardenne massif (Spa, Belgium)

CO₂/³He ratios reveal the presence of mantle gas in the CO₂-rich groundwaters of the Ardenne massif (Spa, Belgium)