Available on ORBi since
15 May 2020
Article (Scientific journals)
Induced Polarization as a Proxy for CO2-Rich Groundwater Detection—Evidences from the Ardennes, South-East of Belgium
Defourny, Agathe  ; Nguyen, Frédéric  ; Collignon, Arnaud et al.
2020 • In Water, 12 (5)
Peer reviewed
 

Files


Full Text
IP AS A PROXY FOR CO2-RICH GW DETECTION.pdf
Publisher postprint (13.27 MB)

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
CO2-rich groundwater; Geophysics; Induced polarisation; Mineral water; Prospection
Abstract :
[en] CO2-rich mineral groundwaters are of great economic and touristic interest but their origin and circulation paths in the underground are often poorly understood. A deeper understanding of the system plumbery and the development of non—to minimally—invasive near-surface geophysical methods for the prospection of potential productive areas is therefore of great interest to manage future supply. The objective of this contribution is to assess the ability of the time-domain induced polarization (TDIP) method, combined with the electrical resistivity tomography (ERT) method, to make the distinction between CO2-rich groundwater from non-gaseous groundwater. Three combined ERT/TDIP tomographies were performed above known uplift zones in the south-east of Belgium where thousands of CO2-rich groundwater springs exist. On all profiles, important contrasts in both electrical resistivity and chargeability distributions were observed in the vicinity of the upflow zone, also reflected in the normalized chargeability sections computed from the measured data. Low resistivity vertical anomalies extending in depth were interpreted as a saturated fracture network enabling the upflow of deep groundwater to the surface. High chargeability anomalies appearing directly close to the CO2-rich groundwater springs were inferred to metallic oxides and hydroxides precipitation in the upper part of the aquifer, linked to pressure decrease and changing redox conditions in the up-flowing groundwater approaching the land surface. The combined interpretation of electrical resistivity and induced polarization datasets provides a very promising method for a robust prospection of CO2-rich groundwater.
Disciplines :
Geological, petroleum & mining engineering
Author, co-author :
Defourny, Agathe ;  Université de Liège - ULiège > UEE
Nguyen, Frédéric ;  Université de Liège - ULiège > Département ArGEnCo > Géophysique appliquée
Collignon, Arnaud
Jobé, Patrick
Dassargues, Alain  ;  Université de Liège - ULiège > Département ArGEnCo > Hydrogéologie & Géologie de l'environnement
Kremer, Thomas
Language :
English
Title :
Induced Polarization as a Proxy for CO2-Rich Groundwater Detection—Evidences from the Ardennes, South-East of Belgium
Publication date :
2020
Journal title :
Water
Publisher :
MDPI
Special issue title :
Applied Geophysics in Hydrogeological Practice
Volume :
12
Issue :
5
Peer reviewed :
Peer reviewed
Name of the research project :
ROSEAU
Funders :
Service Public de Wallonie, Spadel S.A.

Statistics


Number of views
77 (7 by ULiège)
Number of downloads
32 (6 by ULiège)

Scopus citations®
 
2
Scopus citations®
without self-citations
1
OpenCitations
 
2

Bibliography


Similar publications



Contact ORBi