Meso-Cenozoic geodynamic evolution of the Paris Basin: 3D stratigraphic constraints

Guillocheau, François; Robin, Cécile; Allemand, Pascal; Bourquin, Sylvie; Brault, Nicolas; Dromart, G.; Friedenberg, Roselyne; Garcia, Jean-Pierre; Gaulier, Jean-Michel; Gaumet, Fabrice; Grosdoy, Bernard; Hanot, Franck; Strat, Paul Le; Mettraux, Monique; Nalpas, Thierry; Prijac, Christophe; Rigoltet, Christophe; Serrano, Olivier; Grandjean, Gilles

doi:10.1080/09853111.2000.11105372

Cited by 123 publications

(260 citation statements)

References 60 publications

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“…A major, second-order (sensu de Graciansky et al, 1998) sea level rise occurred during the Early Jurassic and is classically attributed to tectonoeustasy (Guillocheau et al, 2000;Hallam, 2001). The stratigraphic position of the base of this cycle T6 is resolved using the biostratigraphic framework and the sedimentology of the Sancerre deposits (Fig.…”

Section: Second-order Cycle: the Liassic Transgressionmentioning

confidence: 99%

“…In most regions of the NW European realm, this surface has led to the absence of the latest Pliensbachian and earliest Toarcian sediments corresponding to a major sedimentary hiatus at the stage boundary (Morard et al, 2003;Hermoso et al, 2009b). The MFS of T6 occurred around the serpentinum-bifrons Zonal transition (= limit between the Early and Middle Toarcian) in the Paris Basin (Gély and Lorenz, 2006;Guillocheau et al, 2000), and can be placed at Sancerre at approximately 322 m, within the clayed facies of the Marnes à Bifrons Fm (Figs. 2 and 3).…”

Section: Second-order Cycle: the Liassic Transgressionmentioning

confidence: 99%

“…This sequence stratigraphic feature is typically used to recognise patterns in relative sea level change (de Graciansky et al, 1998;Williams et al, 2001;Coe, 2003;Hesselbo, 2008). Indeed, changes in the distance between the studied location and the coastline where sediments are supplied may be attributable to sea level assuming no significant change in the source of detrital supply, nor variation of the subsidence rate (Guillocheau et al, 2000). The base of each third-order cycle, called Sequence Boundary (SB) is approximated by the position of the MRS and detected by maxima in the Qz/Qz + Clay curve.…”

Section: Third-order Eustatic Cyclesmentioning

confidence: 99%

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Black shale deposition during Toarcian super-greenhouse driven by sea level

2013

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Abstract. One of the most elusive aspects of the Toarcian oceanic anoxic event (T-OAE) is the paradox between carbon isotopes that indicate intense global primary productivity and organic carbon burial at a global scale, and the delayed expression of anoxia in Europe. During the earliest Toarcian, no black shales were deposited in the European epicontinental seaways, and most organic carbon enrichment of the sediments postdated the end of the overarching positive trend in the carbon isotopes that characterises the T-OAE. In the present study, we have attempted to establish a sequence stratigraphic framework for Early Toarcian deposits recovered from a core drilled in the Paris Basin using a combination of mineralogical (quartz and clay relative abundance) and geochemical (Si, Zr, Ti and Al) measurements. Combined with the evolution in redox sensitive elements (Fe, V and Mo), the data suggest that expression of anoxia was hampered in European epicontinental seas during most of the T-OAE (defined by the positive carbon isotope trend) due to insufficient water depth that prevented stratification of the water column. Only the first stratigraphic occurrence of black shales in Europe corresponds to the "global" event. This interval is characterised by > 10 % Total Organic Carbon (TOC) content that contains relatively low concentration of molybdenum compared to subsequent black shale horizons. Additionally, this first black shale occurrence is coeval with the record of the major negative Carbon Isotope Excursion (CIE), likely corresponding to a period of transient greenhouse intensification likely due to massive injection of carbon into the atmosphere-ocean system. As a response to enhanced weathering and riverine run-off, increased fresh water supply to the basin may have promoted the development of full anoxic conditions through haline stratification of the water column. In contrast, post T-OAE black shales during the serpentinum and bifrons Zones were restricted to epicontinental seas (higher Mo to TOC ratios) during a period of relative high sea level, and carbon isotopes returning to pre-T-OAE values. Comparing palaeoredox proxies with the inferred sequence stratigraphy for Sancerre suggests that episodes of short-term organic carbon enrichment were primarily driven by third-order sea level changes. These black shales exhibit remarkably well-expressed higher-frequency cyclicities in the oxygen availability in the water column whose nature has still to be determined through cyclostratigraphic analysis.

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Section: Second-order Cycle: the Liassic Transgressionmentioning

confidence: 99%

Section: Second-order Cycle: the Liassic Transgressionmentioning

confidence: 99%

Section: Third-order Eustatic Cyclesmentioning

confidence: 99%

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Black shale deposition during Toarcian super-greenhouse driven by sea level

2013

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“…The exhumation of the Guérande leucogranite between the Upper Triassic and lower Jurassic could be related to the extensional crustal deformation events that have been well recorded in the sediments of the Paris Basin (e.g. Guillocheau et al, 2000). Based on a detailed mapping of planation surfaces in the Armorican Massif, Bessin et al (2014) showed that at least two major burring and denudation phases occurred in the Armorican Massif during the MesozoicCenozoic: the burial during the Middle to Upper Jurassic time was followed by a denudation episode during the early Cretaceous then a burial during late Cretaceous was followed by a denudation event from the latest Cretaceous to Eocene times.…”

mentioning

confidence: 91%

Magmatic and hydrothermal behavior of uranium in syntectonic leucogranites: The uranium mineralization associated with the Hercynian Guérande granite (Armorican Massif, France)

Ballouard

Poujol

Boulvais

et al. 2017

Ore Geology Reviews

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT Abstract:Most of the hydrothermal uranium (U) deposits from the European Hercynian belt (EHB) are spatially associated with Carboniferous peraluminous leucogranites. In the southern part of the Armorican Massif (French part of the EHB), the Guérande peraluminous leucogranite was emplaced in an extensional deformation zone at ca. 310 Ma and is spatially associated with several U deposits and occurrences. The apical zone of the intrusion is structurally located below the Pen Ar Ran U deposit, a perigranitic vein-type deposit where mineralization occurs at the contact between black shales and Ordovician acid metavolcanics. In the Métairie-Neuve intragranitic deposit, uranium oxide-quartz veins crosscut the granite and a metasedimentary enclave. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT

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“…It is made up of a layer up to 3,000 m thick of indurated Triassic to Tertiary sediments resting on a basement (Guillocheau et al 2000). This complex, multi-layered aquifer system provides two aquifers (Triassic and Dogger) suitable for large-scale CO 2 storage in a deep saline aquifer.…”

Section: Hydrogeological and Geochemical Contextmentioning

confidence: 99%

Modeling of CO2 Leakage up Through an Abandoned Well from Deep Saline Aquifer to Shallow Fresh Groundwaters

et al. 2011

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This article presents a numerical modeling application using the code TOUGHREACT of a leakage scenario occurring during a CO 2 geological storage performed in the Jurassic Dogger formation in the Paris Basin. This geological formation has been intensively used for geothermal purposes and is now under consideration as a site for the French national program of reducing greenhouse gas emissions and CO 2 geological storage. Albian sandstone, situated above the Dogger limestone is a major strategic potable water aquifer; the impacts of leaking CO 2 due to potential integrity failure have therefore to be investigated. The present case study illustrates both the capacity and the limitations of numerical tools to address such a critical issue.The physical and chemical processes simulated in this study have been restricted to:(i) supercritical CO 2 injection and storage within the Dogger reservoir aquifer, (ii) CO 2 upwards migration through the leakage zone represented as a 1D vertical porous medium to simulate the cement-rock formation interface in the abandoned well (iii) impacts on the Albian aquifer water quality in terms of chemical composition and the mineral phases representative of the porous rock by estimating fluid-rock interactions in both aquifers. 2Because of CPU time and memory constraints, approximation and simplification regarding the geometry of the geological structure, the mineralogical assemblages and the injection period (up to 5 years) have been applied to the system, resulting in limited analysis of the estimated impacts.The CO 2 migration rate and the quantity of CO 2 arriving as free gas and dissolving, firstly in the storage water and secondly in the water of the overlying aquifer, are calculated. CO 2 dissolution into the Dogger aquifer induces a pH drop from about 7.3 to 4.9 limited by calcite dissolution buffering. Glauconite present in the Albian aquifer also dissolves, causing an increase of the silicon and aluminium in solution and triggering the precipitation of kaolinite and quartz around the intrusion point. A sensitivity analysis of the leakage rate according to the location of the leaky well and the variability of the petro-physical properties of the reservoir, the leaky well zone and the Albian aquifers is also provided.

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Meso-Cenozoic geodynamic evolution of the Paris Basin: 3D stratigraphic constraints

Cited by 123 publications

References 60 publications

Black shale deposition during Toarcian super-greenhouse driven by sea level

Black shale deposition during Toarcian super-greenhouse driven by sea level

Magmatic and hydrothermal behavior of uranium in syntectonic leucogranites: The uranium mineralization associated with the Hercynian Guérande granite (Armorican Massif, France)

Modeling of CO2 Leakage up Through an Abandoned Well from Deep Saline Aquifer to Shallow Fresh Groundwaters

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