Overview of the subsurface structural pattern of the Paris Basin (France): Insights from the reprocessing and interpretation of regional seismic lines

Beccaletto, Laurent; Hanot, Franck; Serrano, Olivier; Marc, Stéphane

doi:10.1016/j.marpetgeo.2010.11.006

Cited by 33 publications

(21 citation statements)

References 32 publications

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“…7 Identification and presentation of non-exposed karst aquifers on the map, exemplified by the Paris Basin: a Karst aquifer map of France, where the red triangles point toward non-exposed carbonate rocks, illustrating the basin structure in this regionally important multi-karst-aquifer system; b Geologic profile across the Paris Basin (after Beccaletto et al 2011) that was used to identify non-exposed karst aquifers in this geoprovince detailed global database of karst water sources. Therefore, a pragmatic approach was followed: (1) detailed data collection for the database (in progress); (2) generalized presentation of selected karst water sources on the map.…”

Section: Karst Water Sources and Cave Database Karst Water Sources Damentioning

confidence: 99%

The World Karst Aquifer Mapping project: concept, mapping procedure and map of Europe

et al. 2017

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Karst aquifers contribute substantially to freshwater supplies in many regions of the world, but are vulnerable to contamination and difficult to manage because of their unique hydrogeological characteristics. Many karst systems are hydraulically connected over wide areas and require transboundary exploration, protection and management. In order to obtain a better global overview of karst aquifers, to create a basis for sustainable international water-resources management, and to increase the awareness in the public and among decision makers, the World Karst Aquifer Mapping (WOKAM) project was established. The goal is to create a world map and database of karst aquifers, as a further development of earlier maps. This paper presents the basic concepts and the detailed mapping procedure, using France as an example to illustrate the step-by-step workflow, which includes generalization, differentiation of continuous and discontinuous carbonate and evaporite rock areas, and the identification of non-exposed karst aquifers. The map also shows selected caves and karst springs, which are collected in an associated global database. The draft karst aquifer map of Europe shows that 21.6% of the European land surface is characterized by the presence of (continuous or discontinuous) carbonate rocks; about 13.8% of the land surface is carbonate rock outcrop.

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Section: Karst Water Sources and Cave Database Karst Water Sources Damentioning

confidence: 99%

The World Karst Aquifer Mapping project: concept, mapping procedure and map of Europe

et al. 2017

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“…The Paris Basin is a low subsidence Meso-Cenozoic sedimentary basin. It is composed of silico-clastic and calcareous rocks (Pomerol, 1978;Mégnien, 1980;Perrodon and Zabek, 1990; Guillocheau et al, 2000;Beccaletto et al, 2011). It is set up on a Variscan substratum including Permo-Carboniferous basins.…”

Section: Geological Settingmentioning

confidence: 99%

Mapping of a buried basement combining aeromagnetic, gravity and petrophysical data: The substratum of southwest Paris Basin, France

et al. 2016

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International audienceAeromagnetic and gravity data have proven to be among the most effective methods for mapping deeply buried basin/basement interfaces. However, the data interpretation generally suffers from ambiguities, due to the non-uniqueness of the gravity and magnetic signatures. Here, we tie the gravity and magnetic signatures with a petrophysical characterization of the lithologies outcropping around the French Paris Basin. Our methodology investigates the lithology and structure of its hidden Variscan substratum at the junction between the Armorican Massif and Massif Central. Our approach is based on the combination of potential field data, magnetic susceptibilities measured in the field, density values of sample rocks and information documented in boreholes, in order to propose a new interpretative geological map of the buried substratum of the Paris Basin. The petrophysical description is combined with geophysical patterns of the substratum, mapped through statistical unsupervised classification of suitably selected magnetic and gravity maps. The first step of interpretation consists in extending the outcropping major structures below the Meso-Cenozoic sedimentary cover of the Paris Basin. The litho-structural units, in between these major structures, are then interpreted separately. The second step consists in assigning lithologies within each unit, with respect to its magnetization and density (as derived from the petrophysical compilation), and mapping its extension under cover, integrating punctual borehole information. Overall, with a special emphasis on relating geophysical signatures and petrophysical characteristics of litho-structural units, this methodology permits a precise structural and lithological cartography of a segment of the buried Variscan substratum. In the southwestern part of the Paris Basin, this approach reveals: i) the limited eastward extension of Central Brittany, ii) the eastward extension of the major Cholet fault, iii) the emphasis on N150E-N160E striking fault and their N30E conjugates, controlling the opening of Permo-Carboniferous basins, and iv) the eastward extension of the Eo-Variscan suture

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“…Inset shows the overview map of the Paris Basin (outlined as bold black line). The thin black line is the French border; thin gray lines are rivers; black dotted lines are approximate boundaries between the tectonic subregions of the Paris Basin; red lines are faults from Beccaletto et al (2011). The coordinates are given in latitude and longitude.…”

Section: Stratigraphymentioning

confidence: 99%

Building a three-dimensional near-surface geologic and petrophysical model based on borehole data: A case study from Chémery, Paris Basin, France

et al. 2013

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The fact that velocity models based on seismic reflection surveys commonly do not consider the near-surface geology necessitates filling the gap between the top of a velocity model and the surface of the Earth. In this study, we present a new workflow to build a shallow geologic model based exclusively on borehole data and corroborated by laboratory measurements. The study area is in Chémery (France), located at the southwestern border of the Paris Basin, where a large amount of borehole data is publicly available. The workflow starts with identifying lithologic interfaces in the boreholes and interpolating them between the boreholes. The three-dimensional (3-D) geometry of the lithologies then allows interpretation of the position, orientation, and offset of fault planes. Given the importance of the fault interpretation in the modeling process, a combination of different approaches is used to obtain the most reasonable structural framework. After creating a 3-D grid, the resulting 3-D structural model is populated with upscaled velocity logs from the boreholes, yielding the final near-surface P-wave velocity model. To better constrain the velocity model, we conducted laboratory measurements of Pand S-wave velocities in dry and water-saturated conditions on all lithologies in the model. The laboratory data were used to populate the 3-D near-surface model with V P /V S ratio values. The presented workflow accounts for one-dimensional borehole data and is much more iterative and time-consuming than

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Overview of the subsurface structural pattern of the Paris Basin (France): Insights from the reprocessing and interpretation of regional seismic lines

Cited by 33 publications

References 32 publications

The World Karst Aquifer Mapping project: concept, mapping procedure and map of Europe

The World Karst Aquifer Mapping project: concept, mapping procedure and map of Europe

Mapping of a buried basement combining aeromagnetic, gravity and petrophysical data: The substratum of southwest Paris Basin, France

Building a three-dimensional near-surface geologic and petrophysical model based on borehole data: A case study from Chémery, Paris Basin, France

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