3D structural modelling of small-deformations in poly-phase faults pattern. Application to the Mid-Cretaceous Durance uplift, Provence (SE France)

Guyonnet‐Benaize, Cédric; Lamarche, Juliette; Massé, Jean-Pierre; Villeneuve, Michel; Viseur, Sophie

doi:10.1016/j.jog.2010.03.003

Cited by 47 publications

(38 citation statements)

References 25 publications

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“…This present-day structure of the studied area results from polyphase tectonic events and is characterized by two main fault families, N020À060°and N110À140°in addition to the main thrust systems. From early Cretaceous to late Cretaceous, the regional uplift called the "Durance uplift" brought to the surface the upper Jurassic to lower Cretaceous carbonates (Guyonnet-Benaize et al, 2010;Masse and Philip, 1976). This event is associated to a stratigraphic hiatus and unconformities with patches of bauxite deposits (Laville, 1981).…”

Section: Geological Settingmentioning

confidence: 99%

Groundwater management of a highly dynamic karst by assessing baseflow and quickflow with a rainfall-discharge model (Dardennes springs, SE France)

Baudement

Arfib

Mazzilli

et al. 2017

Bull. Soc. géol. Fr.

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-This paper aims at characterizing the groundwater flow in a highly dynamic karst aquifer using a global modeling approach based on rainfall and spring discharge time series. The Dardennes aquifer (SE France) was studied as it is used for drinking water supply and it also produces karst flash floods that increase the flood hazard downstream in urban areas. Three years of data were available, including a normal rainy year, a wet year and a dry year. Modeling was performed with the new platform KarstMod, a rainfalldischarge model with calibration tools. The Dardennes aquifer model was structured with three interconnected reservoirs: Epikarst, Matrix, and Conduit. Using this modeling approach, we were able to determine the groundwater hydrograph separation of the karst spring discharge, at the annual scale and at the event scale (flood). This gives insight into the low flow (Matrix) available for the drinking water demand and the fast flow (Conduit) that generates flash floods. In such a dynamic aquifer, part of the water budget cannot be accounted for by water resources as fast flow is not stored within the aquifer and is not available for the drinking water demand. The results were compared with the current groundwater management to determine whether the withdrawal is sustainable. Depending on whether it is a wet or a dry year, the proportion of slow flow ranges from 27 to 61% of the total discharge, respectively. During floods in high water periods, the proportion of quickflow increases drastically up to more than 90% of the spring discharge. In the case of a 300 mm/d simulated Mediterranean rainfall event, the mean daily peak value may reach 74 m 3 /s. This discharge can be reduced if the aquifer is previously depleted, which increases the storage within the aquifer. Coupling the geological context and the model results opens up future perspectives for the active management of the karst aquifer. disponible pour les besoins en eau potable et l'écoulement rapide (Conduit) qui génère des crues éclairs. Dans les systèmes hyper-dynamiques, une partie de l'eau qui transite ne peut pas être comptabilisée comme ressource en eau car l'écoulement rapide n'est pas stocké dans l'aquifère et n'est donc pas disponible pour alimenter la demande en eau potable. Les résultats sont comparés avec la gestion actuelle des eaux souterraines afin de montrer si l'exploitation de l'eau est durable. Selon l'année, la proportion de débit de base varie entre 27 et 61 % du débit total, respectivement selon une année pluvieuse ou sèche. Lors des crues en période de hautes-eaux, la proportion du débit rapide augmente considérablement jusqu'à plus de 90 % du débit total des sources. Dans le cas d'un événement pluvieux de type Méditerranéen avec 300 mm/j de pluie, le débit moyen maximum simulé avec le modèle atteint 74 m 3 /s. Ce débit peut être réduit si l'aquifère est déjà déprimé, ce qui augmente le stockage de l'eau. Le couplage du contexte géologique et des résultats du modèle ouvre une perspective future pour une gestion active ...

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Section: Geological Settingmentioning

confidence: 99%

Groundwater management of a highly dynamic karst by assessing baseflow and quickflow with a rainfall-discharge model (Dardennes springs, SE France)

Baudement

Arfib

Mazzilli

et al. 2017

Bull. Soc. géol. Fr.

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“…In this paper we agree that during Albian to Cenomanian time, the transtensional regime is linked to the sinistral drift of the Iberia-Corsica-Sardinia microplate along the North-Pyrenean fault. It led to the Durance high [Gignoux, 1950;Masse and Philip, 1976;Guyonnet-Benaize et al, 2010] separating the Vocontian basin to the north, which corresponds to the western extent of the Alpine basin [Léonide et al, 2012], from the southern Provence basin to the south, filled by a thick (up to 1000 m) late Aptian-Albian turbiditic and basinal series, which was the eastward continuation of the Pyrenean rift system . Masse and Philip [1976] considered that the Durance high corresponds to a complex of horsts and grabens or to a kilometric crustal bend.…”

Section: Middle Triassic To Early-late Cretaceous Rifting Successionmentioning

confidence: 99%

“…Masse and Philip [1976] considered that the Durance high corresponds to a complex of horsts and grabens or to a kilometric crustal bend. Guyonnet-Benaize et al [2010] deciphered that the Durance high is due to either a doming with lithospheric thinning or a restraining bend in the transtensive tectonic regime when the Iberia-Corsica-Sardinia microplate drifted eastward.…”

Section: Middle Triassic To Early-late Cretaceous Rifting Successionmentioning

confidence: 99%

Structural style and evolution of the Pyrenean-Provence thrust belt, SE France

Bestani

Espurt

Lamarche

et al. 2015

Bulletin De La Société Géologique De France

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The Pyrenean-Provence fold-thrust belt is characterized by a geological complexity arising from superimposed tectonic history and the propagation of the deformation through a heterogeneous mechanical substratum inherited from Paleozoic and Mesozoic times. The construction of a regional balanced cross section together with field data show that the thrust system of the southeastern Provence region is characterized by a mixed thick-and thin-skinned tectonic style related to the inversion of deep-seated late Paleozoic-Triassic extensional structures and the décollement of the Mesozoic-Cenozoic sedimentary cover above Triassic series. Earliest Cenomanian restoration state highlights the northward pinched-out of the Lower Cretaceous sedimentary series above the main long-wavelength Durance High uplift. Latest Santonian restoration state indicates a southward tilting of~2 o of the basin attributed to the initial growth of the Pyrenean-Provence prism controlling the external flexure of the foreland. Thrusts propagation in the northern part of the Pyrenean-Provence fold-thrust belt was recorded to be synchronous during latest Cretaceous to Eocene time and produced a~7 o southward basin tilting. This major tilting is attributed to the tectonic inversion and basement thrust stacking of the Cap Sicié-Sainte Baume units. Cross section balancing shows a total horizontal basement shortening of 40 km (~35 %) across the Pyrenean-Provence foreland. The main part of this shortening (~37 km) was accommodated by thick-skinned thrusts involving basement south of the Arc syncline.~5 km of shortening were accommodated northward by the Arc syncline and eastern Sainte-Victoire thin-skin structures, resulting from slip transferred from the deep thick-skinned intercutaneous thrust wedge. Finally we interpret salt tectonic structures of the southeastern Provence as passive diapirism growth during Jurassic to late Cretaceous time, and then reactivated during Pyrenean-Provence compression. Late normal faulting related to hypothetical reactive diapirism during the Oligocene extension episode was predominantly localized above inherited salt structures and probably controlled by inherited basement faults. Style structural et évolution de l'avant-pays pyrénéo-provençal, SE FranceMots-clés. -Architecture structurale, Inversion tectonique, Héritage, Coupes équilibrées, Avant-pays pyrénéo-provençalRésumé. -L'avant-pays pyrénéo-provençal est caractérisé par une structure géologique complexe résultant d'une histoire tectonique polyphasée et de la propagation de la déformation dans un substratum mécanique hétérogène qui est hé-rité du Paléozoïque et du Mésozoïque. La construction d'une coupe équilibrée régionale ainsi que les données de terrain montrent que l'avant-pays provençal, localisé dans le SE de la région de Provence, est caractérisé par un style tectonique mixte de couverture et de socle relié à l'inversion de structures extensives profondes du Paléozoïque supé-rieur-Trias et de décollements de la couverture sédimentaire Mésozoïque-Cénozoïque s...

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“…The “ Durance uplift ” occurred during sinistral transtension of the Iberian block along the North‐Pyrenean Fault associated with the opening of the central Atlantic Ocean [e.g., Schettino and Turco , 2011]. It is considered to be controlled either by kilometric wide crustal bend or by a local extensional regime with horsts and graben systems [ Masse and Philip , 1976; Guyonnet‐Benaize et al , 2010]. Erosion of the uplifted zone was effective during the Late Cretaceous, mostly during the Cenomanian.…”

Section: Geological Settingmentioning

confidence: 99%

Geometry and kinematic evolution of a long‐living foreland structure inferred from field data and cross section balancing, the Sainte‐Victoire System, Provence, France

Espurt¹,

Hippolyte²,

Saillard³

et al. 2012

Tectonics

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The Sainte‐Victoire System (SVS) is a key area to understand how the shortening is accommodated in outer foreland of the Pyrenean‐Provence orogen between Late Cretaceous and Eocene. Structural data, growth strata and fault slip analysis, and four balanced cross sections are used to decipher the along‐strike geometry, deformational characteristics and kinematics of the SVS. The SVS is divided into two structural domains separated by a regional relay zone: the eastern domain is governed by a N‐vergent thin‐skinned tectonic style above Triassic series and the western domain, by a mixed S‐vergent thick‐ and thin‐skinned tectonic style with tectonic inversion of Late Paleozoic‐Triassic half grabens. Growth strata indicate that the eastern SVS grew during Danian as a result of shortening transfer from the southern Arc Basin. In contrast, the western SVS is an independent structure which has recorded the early stage (∼83 Ma) of shortening and focused continuous deformation during ∼40 Myr. The shallow N‐S shortening is ∼5 km (∼25%) and ∼8 km (∼34%) in the western and eastern SVS, respectively. At a regional scale, the tectonic inversion of the SVS and the Arc Basin recorded a deep shortening of the order of 15–18 km (∼34%). Although the shortening magnitude of the SVS remains small, other structures similar to the SVS were synchronously active across foreland basin, suggesting a significant amount of cumulated shortening. This outer foreland shortening may account for a non‐negligible amount of deformation at the Pyrenean‐Provence orogen scale.

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3D structural modelling of small-deformations in poly-phase faults pattern. Application to the Mid-Cretaceous Durance uplift, Provence (SE France)

Cited by 47 publications

References 25 publications

Groundwater management of a highly dynamic karst by assessing baseflow and quickflow with a rainfall-discharge model (Dardennes springs, SE France)

Groundwater management of a highly dynamic karst by assessing baseflow and quickflow with a rainfall-discharge model (Dardennes springs, SE France)

Structural style and evolution of the Pyrenean-Provence thrust belt, SE France

Geometry and kinematic evolution of a long‐living foreland structure inferred from field data and cross section balancing, the Sainte‐Victoire System, Provence, France

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