Fabien Graveleau

University of Lille · Department of Earth Sciences

Experimental modelling applied to the study of orogenic wedge dynamics has been a subject of fruitful re-search for more than 30 years, although the technique dates back as far as the early XIX th century. On one hand, several first order parameters controlling the structural evolution of mountain belts have been inten-sively investigated using the...

Tectonically controlled landforms develop morphologic features that provide useful markers to investigate crustal deformation and relief growth dynamics. In this paper, we present results of morphotectonic experiments obtained with an innovative approach combining tectonic and surface processes (erosion, transport, and sedimentation), coupled with...

The hyper-extended Eastern Sardinian margin is due to the eastward migration of the Appennine-Calabria subduction zone, creating the Neogene back-arc Tyrrhenian Basin. This area was affected by strong erosion during the Messinian Salinity Crisis (MSC, 5.97 - 5.33 Ma) on the continental shelf and slope leading to a major discontinuity, known as the...

Bruno Vendeville (1961–2022) was the foremost practitioner of analog modeling applied to the field of salt tectonics, with his work providing and promoting significant advances in our understanding of this field over more than three decades. Bruno and his collaborators contributed major works in: the mechanics of salt-related deformation; the key p...

In the rejuvenated mountain front, preexisting basement structures are often reactivated and interact with the subsequent thin‐skinned deformation. How the deep structures affect the shallower ones is key to establishing the processes and mechanisms for the foreland fold‐and‐thrust system. We presented an exceptional case study on the structural in...

Deux journées d’excursion sur le terrain ont été organisées les jeudi 20 et vendredi 21 octobre 2022 sur le territoire des dépar- tements du Nord et du Pas-de-Calais, afin de discuter au sein du groupe « FACT-NORD » de Résif-EPOS-France de segments de failles potentiellement actives. Cinq failles ont pu être visitées : 1) la faille de Lille-Hazebro...

Un nouveau forage réalisé sur le Campus de la Cité Scientifique de Villeneuve d’Ascq (Nord) a traversé 3,10 m de craie glauconieuse incluant plusieurs niveaux noduleux indurés ou hardgrounds. Cette unité lithologique, nommée ici Craie glauconieuse de Lezennes, est située aux confins de la limite Turonien-Coniacien. Une dizaine de niveaux repères à...

The architecture (geometry, fault network, and stacking pattern of accreted thrust sheets) of accretionary wedges influences subduction zone processes. However, it remains challenging to constrain the architectural evolution in natural accretionary wedges over geological timescales. In this study, we undertook sandbox analog modeling, with quantita...

La marge orientale de la Sardaigne est une marge continentale passive hyper-étirée, située en Mer Tyrrhénienne occidentale, en contexte d'arrière arc récent (fin Néogène-Quaternaire). Cette région a été affectée par une forte érosion aérienne pendant la Crise de Salinité Messinienne (CSM ; 5,96-5,33 Ma) associée à une baisse importante du niveau ma...

Geomorphological evidence provides significant information on the processes that govern lateral propagation of a growing active anticline. Within actively developing fold-and-thrust belts evidence can be recorded in Quaternary landforms and the drainage network. In the Kuqa fold-and-thrust belt (KFTB), located in the southern foothills of the Tian...

In central Asia, the Tianshan mountains have underwent a series of subduction-collision-accretion processes during Paleozoic times that resulted in forming basement structures later reactivated during the Cenozoic rejuvenation of the range. In the northern Tianshan-South Junggar foreland basin, en échelon W-E / WNW-ESE folds constitute the large-sc...

The Eastern Sardinian margin consists in a hyper-extended rifted margin, located in the western Tyrrhenian Sea, a recent back-arc basin (late Neogene). This area was affected by strong aerial erosion during the Messinian Salinity Crisis (MSC, 5.96 – 5.33 My) associated with the drop of sea level (> 1500 m) which occurred throughout the whole Medite...

La dynamique d’un front de chaîne de montagnes résulte d’interactions entre les processus de déformation (la tectonique) qui initient les reliefs et les processus de surface (l’érosion, la sédimentation, le climat) qui les détruisent. Souvent étudiée à partir d’exemples naturels récents, cette thématique est peu abordée sur des chaînes de montagnes...

Le suivi régulier d’un chantier de terrassement localisé à la limite des communes de Lezennes et de Villeneuve d’Ascq, au cœur de la Métropole de Lille (59, Nord), a permis d’observer et d’analyser en détail le contact géologique entre le « tuffeau » du Thanétien et la craie du Coniacien. Cette surface de contact apparaît remarquablement nette et p...

Mainland France is part of a plate interior with a strong structural heritage, undergoing a low rate of deformation, where destructive earthquakes can nevertheless occur. In this paper, we emphasize that the knowledge of active faults is still largely fragmentary, and that significant efforts are needed to generate robust data, in particular on the...

Mainland France is part of a plate interior with a strong structural heritage, undergoing a low rate of deformation, where destructive earthquakes can nevertheless occur. In this paper, we emphasize that the knowledge of active faults is still largely fragmentary, and that significant efforts are needed to generate robust data, in particular on the...

The Qiulitage fold-and-thrust system in the Kuqa foreland is a prominent NE-SW trending relief associated with active thrust-related folding in the southern Tian Shan. Based on open-access DEMs and field work, we carried out a detailed geomorphologic analysis of the Qiulitage topography based on drainage network characteristics and several morphome...

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In NW Europe, the late Carboniferous Variscan collision between the Laurussia and the Armorica‐Gondwana continental blocks led to the development of a crustal‐scale north‐verging thrust system along the southern Laurussian margin. In northern France, the 3‐D geometry and kinematics of the Variscan deformation front have been investigated on the bas...

Fold-and-thrust belts are a characteristic structural unit observed at the outer part of mountain belts and accretionary prisms formed along convergent plate boundaries. The active folds and thrusts usually develop at the piedmonts and within the foreland basins of active mountain belts. Here human populations, fertile lands, infrastructures and ec...

In this work we used analogue models in order to better understand how two orthogonal fold-and-thrust belts may interact in the foreland and influence the geometry and kinematics of the resulting structures. Our experimental device has two vertical mobile backstops oriented perpendicular with respect to each other, independent and moving coevally w...

The Huallaga Basin is a deformed foreland basin located in North Peru. The basin comprises several syntectonic depocenters. The most significant is the Biabo Syncline located at the back of the Chazuta Thrust, a long, flatfloored thrust detaching on an evaporitic décollement, which has accommodated more than 40 km of horizontal displacement. The ha...

The Huallaga Basin located in the Sub-Andean (North Peru) is a foreland basin where deformation involves a salt-related detachment. The basin comprises several syntectonic depocenters, one of which is the Biabo Syncline located at the back of the Chazuta Thrust, a flat-floored thrust detaching on an evaporitic layer, and that has accommodated more...

The WATER project (Western Aegean Tectonic Evolution and Reactivations) focuses on the study of a tectonically active domain of the northwestern Aegean Sea (Greece): the Oreoi Channel and the North Evia Gulf. This Oreoi Channel-North Evia Gulf domain, including the onshore Sperchios basin, is a key area located at the junction between the extension...

Les mécanismes de l’inversion tectonique négative, c’est à dire la reprise en extension de structures compressives héritées, sont peu étudiés par rapport à ceux de l’inversion tectonique positive qui correspond à la reprise en compression d’anciennes structures extensives. Il s’agit cependant d’un processus géologique courant durant les dernières p...

L'étude du front de déformation varisque septentrional revêt un intérêt particulier puisqu'il permet de contraindre la dynamique tardive de la collision, à la fin du Carbonifère, alors que les domaines internes, préalablement structurés dès le Dévonien supérieur, tendent à s'affaisser au coeur du système orogénique. Au cours des 20 dernières années...

La structure du « Dôme du Mélantois » est un anticlinal E-W à fort rayon de courbure situé au SE de la métropole de Lille. Né de la réactivation tertiaire de failles profondes enracinées dans le socle varisque, il fait affleurer la craie du Sénonien de part et d’autre des bassins tertiaires de Flandres au Nord et d’Orchies au Sud. Les rares possibi...

La compréhension de la dynamique des paysages dans les chaînes de montagnes impose d'analyser rigoureusement les mécanismes de formation et d'évolution des reliefs aux différentes échelles spatio-temporelles. Du point de vue géomorphologique, l'étude approfondie des relations entre les formes élémentaires et les structures géologiques (plis et fail...

La dynamique d’un front de chaîne de montagnes résulte d’interactions entre les processus de déformation (la tectonique) qui initient les reliefs et les processus de surface (l’érosion, la sédimentation, le climat) qui les détruisent. Souvent étudiée à partir d’exemples naturels récents, cette thématique est peu abordée sur des chaînes de montagnes...

The mechanisms of negative tectonic inversion, i.e. the reactivation in extension of inherited compressional structures, have received little attention compared with those of positive tectonic inversion in which old extensional structures have been reactivated in shortening. However, these are quite common during the late tectonic phases of the evo...

The mechanisms of tectonic inversion of a passive margin are difficult to analyze in the field because of the multi-phased evolution of the natural examples and their large size. In the French-Belgian Ardennes one can observe relicts of the Northern front of the large Variscan mountain belt, a front named “the Midi Fault”. This major thrust fault,...

The critical taper theory is generally accepted by the scientific community for brittle wedges (e,g, critical, overcritical, or undercritical tapers). Much less is known about wedges that comprise large volumes of viscous than brittle material. This is not the case in regular accretionnary prisms, but it does exist in some areas (in the central Med...

The El Hamma graben system located west of Gabes, Tunisia, is an extensional relay zone between two major right-lateral shear zones trending N110-120 (Hassine et al 2015): the Hadhifa-Fejej fault corridor in the North, and the Oglat Merteba-Matmata fault in the South. This extensional area has a 35km width and a 40km length. Outcrop and borehole da...

The El Hamma graben system located west of Gabes, Tunisia, represents an extensional relay between two major dextral shear zones trending N110-120: the Hadhifa-Fejej fault corridor in the North, and the OglatMerteba-Matmata fault in the South. This extensional area has a 35km width and a 40km length. Well data show that this basin contains a Mesozo...

Topography presents, as many geophysical fields, important fluctuations over a large range of scales. On the Earth, theses fluctuations are controlled by various geological processes over which, tectonics (and isostasy) is a first order one. Indeed, it generates surfaces which are scale invariant over many scales. Here we are interested in a multi-...

The critical taper theory is generally accepted by the scientific community for brittle wedges (e,g, critical, overcritical, or undercritical tapers). Much less is known about wedges that comprise large volumes of viscous than brittle material. This is not the case in regular accretionnary prisms, but it does exist in some areas (in the central Med...

We conducted a series of analogue experiments on shortening of a brittle cover (dry sand) above a deep, thin, frictional detachment (glass microbeads). In some experiments, the cover was homogeneous, entirely brittle. In others, there was a thin viscous silicone layer (representing salt) embedded at mid height into the cover, and initially located...

La dynamique d'un front de chaîne de montagnes résulte d'interactions entre les processus de déformation (la tectonique) qui initient les reliefs et les processus de surface (l'érosion, la sédimentation, le climat) qui les détruisent. Souvent étudiée à partir d'exemples naturels récents, cette thématique est peu abordée sur des chaînes de montagnes...

Fold-and-thrust belts (FTBs) can be segmented both across and along strike because of various factors including tectonic and stratigraphic inheritance. In this study, we investigated along/across-strike structural interactions in a FTB propagating toward a foreland which displays contrasted lithological sequences. A set of analogue models was perfo...

Présentation à l’occasion de l’Assemblée Générale de la Société Géologique du Nord

Analog modeling provides the exploration and production industry with one of the most powerful and visual tools to understand the 4D structural evolution of sedimentary basins and individual or families of structures within those basins. Knowledge of the model setup and timing of syn-kinematic

Le Bassin de Dieppe-Hampshire est un bassin tertiaire situé en Manche orientale qui s’étend du Sud-Est de l’Angleterre jusqu’au littoral fran¸cais des régions Nord-Pas-de-Calais, Picardie et Haute-Normandie. Ce domaine se met en place dans un contexte d’inversion des bassins mésozoïques bordiers, en réponse à l’ouverture de l’Atlantique Nord et aux...

Poster

Fold-and-thrust belts can be segmented both across and along strike because of diverse factors, including tectonic and stratigraphic inheritance. Along-strike stratigraphic changes in the foreland are classically observed and very often cause a curvature of the deformation front. Although the parameters controlling this curvature are well documente...

Accretionary wedges are generally segmented both across and along strike because of diverse factors including tectonic and stratigraphic inheritance. In fold-and-thrust belts, along-strike stratigraphic changes in the foreland sequence are classically observed and cause a curvature of the deformation front. Although the parameters controlling this...

The Eastern Sardinian passive continental margin formed during the opening of the Tyrrhenian Sea, which is a back-arc basin created by continental rifting and oceanic spreading related to the eastward migrating Apennine subduction system (middle Miocene to Pliocene). Up to now, rifting in this key area was considered to be pro parte coeval with the...

This is the 2016 edition of the SGN La Lettre d'information (Newsletter). 2016 is the Gosselet Year. Jules Gosselet was the founding president of the SGN in 1870. He died in early 1916 as a consequence of the WWI. This 2016 edition of our Newsletter announces and advertizes all the geoscience activities of the Société Géologique du Nord, viz., fiel...

Major ophiolitic thrust sheets are widespread within the internal Hellenides, particularly in the Pelagonian domain (Greece and Albania). The ophiolitic bodies are notably well exposed in western Othris mountains of continental Greece. In that area, the structural stacking of Jurassic obducted nappes is particularly well constrained. New sedimentol...

Le projet “ TREMOR ” (Tectonique REcente en Manche ORientale) s’inscrit dans une problé- matique générale visant à mieux identifier et caractériser les systèmes fracturés qui se développent sur le plateau continental de la Manche, dans la continuité des structures tectoniques reconnues à terre dans le bassin anglo-parisien en Haute-Normandie, Picar...

Colloque Flotte Océanographique Côtière - Bordeaux- 11 - 12 juin 2015.

This article focuses on how deformation and displacements are transferred between two décollements located at different stratigraphic levels by means of analogue modeling using brittle/viscous, sand/silicone systems. We present results from ten analogue models, in which we varied key parameters, such as the amount of horizontal offset or overlap be...

Presentation

Le projet METYSS-METYSAR est un chantier terre-mer bénéficiant du soutien programmatique « Actions Marges » qui a notamment pour objectif de contraindre les relations entre tectonique, sédimentation, et évolution géodynamique de la Marge Est- Sarde (Gaullier et al., 2014). L’ouverture arrière-arc de la Mer Tyrrhénienne, entre la Sardaigne et le dom...