Discriminating between tectonic and eustatic controls on the stratigraphic record in the Paris basin

Robin, .; Guillocheau,; Gaulier,

doi:10.1046/j.1365-3121.1998.00210.x

Cited by 18 publications

(7 citation statements)

References 24 publications

(28 reference statements)

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“…However, the main drawback is that, in this method, only vertical movements are measured. This approximation is acceptable for an intracratonic basin (Robin, 1997; Robin et al , 1998; Robin et al , 2000) or a vertical normal fault (Dromart et al , 1998); however, we can seldom ignore horizontal displacements associated with growth faults on the kilometre to tens of kilometre scale.…”

Section: Introductionmentioning

confidence: 84%

Rates of deformation of an extensional growth fault/raft system (offshore Congo, West African margin) from combined accommodation measurements and 3‐D restoration

Rouby¹,

Guillocheau²,

Robin³

et al. 2003

Basin Research

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Abstracts The aim of this paper is to quantify the evolution in time and space of the accommodation (space available for sedimentation) in the case of a growth fault structure resulting from gravity‐induced extension comprising a listric fault/raft system located along the West African margin. To achieve this, use was made of an original approach combining two complementary techniques (accommodation variation measurements and 3‐D restoration) in order to quantify vertical and horizontal displacement related to deformation, using a data set made up of a 3‐D seismic survey and well logs. We applied sequence stratigraphic principles to (i) define a detailed stratigraphic framework for the Albo‐Cenomanian and (ii) measure subsidence rates from accommodation variations. 3‐D restoration was used to (iii) reconstruct the evolution of the 3‐D geometry of the fault system. The rates of horizontal displacement of structural units were measured and linked to successive stages in the growth of the fault system. Subsidence of the structural units exhibits three scales of variation: (1) long‐term variation (10 Ma) of c. 80 m Ma−1 for a total subsidence of about 1400 m, compatible with the general subsidence of a passive margin, and (2) short‐term variations (1–5 Ma) corresponding to two periods of rapid subsidence (about 150–250 m Ma−1) alternating with periods of moderate subsidence rate (around 30 m Ma−1). These variations are linked to the development of the fault system during the Albian (with downbuilding of the raft and development of the initial basin located in between). During the Cenomanian, the development of the graben located between the lower raft and the initial basin did not seem to affect the vertical displacements. (3) High‐frequency variations (at the scale of genetic unit sets) range between −50 and 250 m for periods of 0.2–2 Ma. Accommodation variations governed these cycles of progradation/retrogradation rather than sediment flux variations. In addition, the nine wells display a highly consistent pattern of variation in accommodation. This suggests that the genetic unit sets were controlled at a larger scale than the studied system (larger than 20 km in wavelength), for example, by eustatic variations. Translation rates are between 3 and 30 times higher than subsidence rates. Therefore, in terms of amplitude, the main parameter controlling the space available for sedimentation is the structural development of the fault system, that is to say, the seaward translation of the raft units, itself resulting from a regional gravity‐driven extension.

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Section: Introductionmentioning

confidence: 84%

Rates of deformation of an extensional growth fault/raft system (offshore Congo, West African margin) from combined accommodation measurements and 3‐D restoration

Rouby¹,

Guillocheau²,

Robin³

et al. 2003

Basin Research

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“…The next step is to discriminate the tectonic forcing from the eustatic component in a downward migration of the shoreline. Three conditions can be considered where the shoreline migration is likely to be a direct measure of uplift: Based on published eustatic charts [ Haq et al ., ; Miller et al ., ], which can sometimes be contradictory, the studied time interval does not correspond to a period of sea level fall.The amplitude of the downward migration of the shoreline is larger than the maximum rate of sea level fall accepted for greenhouse or icehouse periods, i.e., around 100 m of sea level fall over a 1 Ma period and around 150 m for a duration of 100 Ka, respectively.For any given time interval, noticeable spatial variations in relative sea level fall are observed, which must therefore be related to tectonic forcing [ Robin et al ., ] as eustasy is, by definition, a function of time only, not space.…”

Section: Geological Constraints On Late Cretaceous Erosionmentioning

confidence: 99%

Rapid erosion of the Southern African Plateau as it climbs over a mantle superswell

et al. 2014

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We present new sedimentary flux data confirming that a large pulse of erosion affected the Southern African Plateau in the Late Cretaceous and is likely to be related to a major uplift episode of the plateau. This short phase of erosion (i.e., less than 30 Myr in duration) has commonly been difficult to reconcile with a mantle origin for the plateau anomalous uplift: given its size, the rise of the African superplume is likely to have lasted much longer. Here we demonstrate by using a simple model for fluvial erosion that tilting of the continent as it rides over a wide dynamic topography high cannot only cause rapid uplift of the plateau but also trigger continent-wide drainage reorganization, leading to substantial denudation in a relatively short amount of time. The amplitude and short duration of the sedimentary pulse are best reproduced by assuming a strong erodibility contrast between the Karoo sedimentary and volcanic rocks and the underlying basement. We also present a new compilation of paleoclimate indicators that shows a transition from arid to very humid conditions approximately at the onset of the documented erosional pulse, suggesting that climate may have also played a role in triggering the denudation. The diachronism of the sedimentary flux between the eastern and western margins of the plateau and the temporal and geographic coincidence between the uplift and kimberlite eruptions are, however, better explained by our tilt hypothesis driven by the migration of the continent over a fixed source of mantle upwelling.

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“…Des manifestations tectoniques similaires à la même époque ont été mises en évidence et largement discutées pour la marge continentale subbetique (Vera, 1988 ;Rey, 1998 ;Ruiz-Ortiz et al, 2004) et pour le bassin français (Robin et al, 1996).…”

Section: Discussion Et Conclusionunclassified

Tectono-sedimentary events during Lias-Dogger at the southern margin of the Central High-Atlas, Morocco

Ettaki¹,

Ibouh²,

Chellaı̈³

2007

Estud. geol.

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RÉSUMÉL'analyse tectono-sédimentaire des séries du Lias et du Dogger de la marge méridionale du HautAtlas central, en particulier la région du Todrha-Dadès, montre l'existence d'une relation étroite entre la tectonique et la sédimentation. ABSTRACTThe tectono-sedimentary analysis of the Jurassic sediments in the southern margin of the central High-Atlas and particularly in the Todrha-Dadès area shows the existence of a good relationship between the tectonic and the sedimentary events. The structuring of this area is controlled by a group of faults whose cartographic axes show bending paces of direction NE-SW straightening toward the NNE. The analysis of the spatial organisation of lower and middle Lias deposits shows a dominance of carbonated deposits with ammonites, algae and foraminifera, with variations of thickness and lateral facies variations. The upper Lias and the Dogger correspond to clastic deposits and carbonates interbeded with neritic fauna. The structural analysis shows that the sedimentation in the southern margin of the central HighAtlas is controlled, in addition to eustatic factors, by a paleostress field dominated by minimum main stress fields of orientations which change depending on the age. The analysis of structures and their geometry as well as the syn-sedimentary tectonics allowed to establish the directions of the tectonic stress, which controlled the structuration of the studied basin in the Jurassic. The general synthesis of the data shows variations of distensive directions in time and space. In the Sinemurian-lower Carixian the direction of the tectonic stress (σ 3 ) is NW-SE. The middle Domerian was a relative quiet tectonic time. In the upper Domerian the distensive tectonic stress is NNW-SSE to NW-SE. In the Toarcian, the sedimentation takes place in a transtensif tectonic context. The synsedimentary structures are developed by fossilized normal faults, slope deposits and spatio-temporal variations of the facies and thickness. Geodynamic and paleo-1 Faculté Polydisciplinaire -Khouribga, département des Sciences de la Terre, B. P : 145, Khouribga principale 25000, Maroc.

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Discriminating between tectonic and eustatic controls on the stratigraphic record in the Paris basin

Cited by 18 publications

References 24 publications

Rates of deformation of an extensional growth fault/raft system (offshore Congo, West African margin) from combined accommodation measurements and 3‐D restoration

Rates of deformation of an extensional growth fault/raft system (offshore Congo, West African margin) from combined accommodation measurements and 3‐D restoration

Rapid erosion of the Southern African Plateau as it climbs over a mantle superswell

Tectono-sedimentary events during Lias-Dogger at the southern margin of the Central High-Atlas, Morocco

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