Diagenetic patterns and pore space distribution along a platform to outer-shelf transect (Urgonian limestone, Barremian–Aptian, SE France)

Léonide, Philippe; Fournier, François; Reijmer, John J.G.; Vonhof, Hubert; Borgomano, Jean; Dijk, Jurrien; Rosenthal, Maelle; Goethem, Manon van; Cochard, Jean; Meulenaars, Karlien

doi:10.1016/j.sedgeo.2014.03.001

Cited by 62 publications

(56 citation statements)

References 39 publications

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“…Scenarios of diagenetic and pore network evolution of the Urgonian limestones from Provence have been proposed by Léonide et al (2014) and Fournier et al (2014). According to these interpretations, highly microporous limestones are considered to have developed as a result of micrite leaching and neomorphism in a meteoric shallow-burial setting probably during a.…”

Section: Lower Cretaceous (Barremian-aptian) Shallow-water Marine Carmentioning

confidence: 99%

The equivalent pore aspect ratio as a tool for pore type prediction in carbonate reservoirs

Fournier¹,

Pellerin²,

Villeneuve³

et al. 2018

Bulletin

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Section: Lower Cretaceous (Barremian-aptian) Shallow-water Marine Carmentioning

confidence: 99%

The equivalent pore aspect ratio as a tool for pore type prediction in carbonate reservoirs

Fournier¹,

Pellerin²,

Villeneuve³

et al. 2018

Bulletin

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“…1). The Urgonian facies rocks are very tight, with a very low intergranular porosity (Leonide et al, 2014), and with mainly porosity and permeability in karstified vertical faults and fractures. These fractures have been recognized across the carbonate Jurassic and Cretaceous rocks.…”

Section: How Has Geological Evolution Structured the Aquifer?mentioning

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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“…In summary, a complex interplay of (often facies‐related) diagenetic processes affected the bulk carbonate carbon‐isotope archive of the Sausset and Martigues sections, thereby masking the initial δ 13 C DIC pattern and lowering its potential for regional and global correlation purposes. Judging from stable isotope, microfacies, and cathodoluminescence data obtained during the current study and previous work [ Lamarche et al ., ; Léonide et al ., ], differential diagenetic alteration along stratigraphic and spatial transects was controlled by (i) the distance to the shoreline (Sausset ≪ Martigues), (ii) burial depth (Sausset: 600 m; Martigues: 800 m), and (iii) microporosity (Sausset: tight carbonates; Martigues: porous and tight carbonates).…”

Section: Interpretation and Discussionmentioning

confidence: 99%

“…Differences in porosity at Sausset and Martigues also add to the differential spatial (and stratigraphic) diagenetic alteration of bulk carbonate carbon‐isotope archives. Whereas carbonates exposed at the Sausset section provide neither macro nor microporosity, the Martigues section is characterized by an alternation of tight and (micro)porous carbonates [ Lamarche et al ., ; Léonide et al ., ]. According to Léonide et al .…”

Section: Interpretation and Discussionmentioning

confidence: 99%

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Improving shallow‐water carbonate chemostratigraphy by means of rudist bivalve sclerochemistry

Huck

Heimhofer

2015

Geochem Geophys Geosyst

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Deep-time shallow-marine carbonate platforms record distinct biotic responses to climatic and environmental stressors. Unfortunately, precise temporal assignment of these biotic responses is often problematical due to poor biostratigraphic control and/or a significant diagenetic overprint of the neritic bulk carbonate chemostratigraphic inventory. An accurate stratigraphic framework is essential to better understand the causal relation between biotic events recorded by carbonate platforms and environmental changes that, for instance, culminated in mass extinction events or prolonged episodes of oceanic anoxia. Here we provide an integrated carbon and strontium-isotope stratigraphy of the Early Cretaceous subtropical Provence carbonate platform in SE France that is based solely on pristine low-Mg calcite from rudist bivalves. Carbon-isotope data of geochemically screened rudist fragments enabled reconstruction of a characteristic Barremian pattern including the Mid-Barremian Event (MBE) that allowed for a precise correlation with stratigraphically well-constrained Tethyan shallow-water and hemipelagic reference sections. In order to evaluate ontogenetic carbon-isotope changes and the overall variability of the shell-derived carbon-isotope data, numerous sclerochronological carbon-isotope profiles of individual large rudist shells are presented. Strontium-isotope stratigraphy supports the carbon-isotopebased age of the studied sections, but also provides unequivocal evidence for a major hiatus in the depositional record covering large parts of the Late Barremian. In contrast to biostratigraphic and bulk carbonate chemostratigraphic archives, the here established chronostratigraphy of carbonate platform evolution in the southern Provence region demonstrates a twofold resurgence of rudist-rich carbonate platform production during the Early Aptian and arguably the latest Early Aptian.

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Diagenetic patterns and pore space distribution along a platform to outer-shelf transect (Urgonian limestone, Barremian–Aptian, SE France)

Cited by 62 publications

References 39 publications

The equivalent pore aspect ratio as a tool for pore type prediction in carbonate reservoirs

The equivalent pore aspect ratio as a tool for pore type prediction in carbonate reservoirs

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

Improving shallow‐water carbonate chemostratigraphy by means of rudist bivalve sclerochemistry

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