David Graindorge
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View article: New Kinematic Model of the Early Opening of the Equatorial Atlantic Realm
New Kinematic Model of the Early Opening of the Equatorial Atlantic Realm Open
The opening of the Equatorial Atlantic Ocean constitutes the final stage of Gondwana's breakup, leading to the separation of the African and South American continents. The early spreading has been debated due to the absence of magnetic ano…
View article: Tectono-magmatic evolution of the Walvis plateau: Multi-scale and polyphased interactions between mantle plume, rifting and transform activity
Tectono-magmatic evolution of the Walvis plateau: Multi-scale and polyphased interactions between mantle plume, rifting and transform activity Open
The Walvis transform marginal plateau constitutes a key geodynamic node in the evolution of the South Atlantic Ocean. It is the conjugate of the Santos transform marginal plateau. Both plateaus formed associated successively with: (1) the …
View article: Unexpected post-breakup altitude of the distal continental margin of the Demerara Plateau (French Guiana): New constraints from LA-ICP-MS U-Pb calcite dating
Unexpected post-breakup altitude of the distal continental margin of the Demerara Plateau (French Guiana): New constraints from LA-ICP-MS U-Pb calcite dating Open
The Demerara Plateau is a submarine bathymetric high, 230 km-long and 170 km-wide, lying between 1000 and 3000 m-depth, and located north of French Guiana and Suriname shelves. On its northeastern border, the Bastille Plateau is a 16 km-lo…
View article: Tectonic accommodation of the northern Antilles strike slip to subduction transition along the Porto-Rico – Anegada – Lesser Antilles Margin 
Tectonic accommodation of the northern Antilles strike slip to subduction transition along the Porto-Rico – Anegada – Lesser Antilles Margin  Open
Plate motion along concave (toward the upper plate) strike slip to subduction transition (SSST) where the down going plate does not tear, results over time in a lengthening of the subduction zone while the downgoing plate is transported al…
View article: Geomorphological and Tectonic Evolution of the central English Channel: Insights from High-Resolution Marine Geophysical Data
Geomorphological and Tectonic Evolution of the central English Channel: Insights from High-Resolution Marine Geophysical Data Open
The Cotentin Peninsula (CP), located in north-western France, represents the northern extension of the North Armorican Domain (NAD), which forms a structural rim in the central Channel. The NAD, including the Cotentin and the Channel Islan…
View article: Combining remote sensing surveys, digital and <i>in situ</i> field trips in higher education geology classroom
Combining remote sensing surveys, digital and <i>in situ</i> field trips in higher education geology classroom Open
The OceanField project is an integrated field-work and classroom-based course offered to first year Master students in Marine Geosciences (at the European Institute for Marine Studies IUEM − University of Brest), creating a synergy between…
View article: New insights on the relationship between inherited structures of the opening of the Algero-Balearic basin and recent inversion of its southern margin
New insights on the relationship between inherited structures of the opening of the Algero-Balearic basin and recent inversion of its southern margin Open
<p>The Algero-Balearic Basin (ABB) is an Oligo-Miocene back-arc basin resulting from a polyphase tectonic evolution involving Tethyan subduction retreat and bilateral slab tear propagation. The ABB was fully opened by the Tortonian, …
View article: Monitoring a submarine strike-slip fault, using a fiber optic strain cable
Monitoring a submarine strike-slip fault, using a fiber optic strain cable Open
<p>The goal of the ERC (European Research Council) funded project - FOCUS is to apply laser reflectometry on submarine fiber optic cables to detect deformation at the seafloor in real time using BOTDR (Brillouin Optical Time Domain R…
View article: Deep structure of the Demerara Plateau and its two-fold tectonic evolution: from a volcanic margin to a transform marginal plateau, insights from the Conjugate Guinea Plateau
Deep structure of the Demerara Plateau and its two-fold tectonic evolution: from a volcanic margin to a transform marginal plateau, insights from the Conjugate Guinea Plateau Open
Transform marginal plateaus (TMPs) are large and flat structures commonly found in deep oceanic domains, but their origin and relationship to adjacent oceanic lithosphere remain poorly understood. This paper focuses on two conjugate TMPs, …
View article: Initiation of transform continental margins: the Cretaceous margins of the Demerara plateau
Initiation of transform continental margins: the Cretaceous margins of the Demerara plateau Open
During the end of the lower Cretaceous, the connection between the South and the Central Atlantic accretionary axis led to the oblique opening of the Equatorial Atlantic, and to the separation of Africa and South America by alternating tra…
View article: Back‐Arc Dynamics Controlled by Slab Rollback and Tearing: A Reappraisal of Seafloor Spreading and Kinematic Evolution of the Eastern Algero‐Balearic Basin (Western Mediterranean) in the Middle‐Late Miocene
Back‐Arc Dynamics Controlled by Slab Rollback and Tearing: A Reappraisal of Seafloor Spreading and Kinematic Evolution of the Eastern Algero‐Balearic Basin (Western Mediterranean) in the Middle‐Late Miocene Open
In spite of clear fan‐shaped magnetic anomalies in the Eastern Algero‐Balearic Basin (EABB), the way how and the time when seafloor spreading occurred are still debated. In this work, a new seismo‐stratigraphic interpretation based on deep…
View article: Ongoing Inversion of a Passive Margin: Spatial Variability of Strain Markers Along the Algerian Margin and Basin (Mediterranean Sea) and Seismotectonic Implications
Ongoing Inversion of a Passive Margin: Spatial Variability of Strain Markers Along the Algerian Margin and Basin (Mediterranean Sea) and Seismotectonic Implications Open
Subduction initiation is an important but still poorly documented process on Earth. Here, we document one of a few cases of ongoing transition between passive and active continental margins by identifying the geometrical and structural sig…
View article: Status of Basement Terranes in Orogens: Insights From the Cadomian Domain of the North Armorican Variscides, Western France
Status of Basement Terranes in Orogens: Insights From the Cadomian Domain of the North Armorican Variscides, Western France Open
The stable versus mobile behavior of basement terranes in orogens is discussed about the North Armorican Cadomian‐floored domain (NAD) in the Armorican Variscides, Western France. Our onshore/offshore structural study demonstrates the hete…
View article: Paleogene V‐Shaped Basins and Neogene Subsidence of the Northern Lesser Antilles Forearc
Paleogene V‐Shaped Basins and Neogene Subsidence of the Northern Lesser Antilles Forearc Open
Oblique collision of buoyant provinces against subduction zones frequently results in individualizing and rotating regional‐scale blocks. In contrast, the collision of the Bahamas Bank against the Northeastern Caribbean Plate increased the…
View article: Deep Structure of the Grenada Basin From Wide‐Angle Seismic, Bathymetric and Gravity Data
Deep Structure of the Grenada Basin From Wide‐Angle Seismic, Bathymetric and Gravity Data Open
The Grenada back‐arc basin is located between the Aves Ridge, which hosted the remnant Early Paleogene “Great Caribbean Arc,” and the Eocene to Present Lesser Antilles Arc. Several earlier studies have proposed different modes of back‐arc …
View article: Reply to Comment by A. Argnani on “Geometry of the Deep Calabrian Subduction From Wide‐Angle Seismic Data and 3‐D Gravity Modeling”
Reply to Comment by A. Argnani on “Geometry of the Deep Calabrian Subduction From Wide‐Angle Seismic Data and 3‐D Gravity Modeling” Open
Andrea Argnani in his comment on Dellong et al. (2020, https://doi.org/10.1029/2019gc008586 ) (Geometry of the deep Calabrian subduction (Central Mediterranean Sea) from wide‐angle seismic data and 3‐D gravity modeling) proposes an alterna…
View article: Conjunction between diachronic volcanic processes and transform margin leads to the unusual structure of the Demerara transform marginal plateau and its three different margins.
Conjunction between diachronic volcanic processes and transform margin leads to the unusual structure of the Demerara transform marginal plateau and its three different margins. Open
<p><span>The Demerara plateau (offshore Suriname and French Guiana) is an original transform marginal plateau located at the junction between the central and the equatorial Atlantic domains. New results combining the interpreta…
View article: The FOCUS experiment 2020 (Fiber Optic Cable Use for Seafloor studies of earthquake hazard and deformation)
The FOCUS experiment 2020 (Fiber Optic Cable Use for Seafloor studies of earthquake hazard and deformation) Open
<p>Laser reflectometry (BOTDR), commonly used for structural health monitoring (bridges, dams, etc.), for the first time is being tested to study movements of an active fault on the seafloor, 25 km offshore Catania Sicily (an urban a…
View article: Geometry of the Deep Calabrian Subduction (Central Mediterranean Sea) From Wide‐Angle Seismic Data and 3‐D Gravity Modeling
Geometry of the Deep Calabrian Subduction (Central Mediterranean Sea) From Wide‐Angle Seismic Data and 3‐D Gravity Modeling Open
The Calabrian subduction zone is one of the narrowest arcs on Earth and a key area to understand the geodynamic evolution of the Mediterranean and other marginal seas. Here in the Ionian Sea, the African plate subducts beneath Eurasia. Ima…
View article: The Bunce Fault and Strain Partitioning in the Northern Lesser Antilles
The Bunce Fault and Strain Partitioning in the Northern Lesser Antilles Open
Strain partitioning related to oblique plate convergence has long been debated in Northern Lesser Antilles. Geophysical data acquired during the ANTITHESIS cruises highlight that the sinistral strike‐slip Bunce Fault develops along the ver…
View article: Ionian Abyssal Plain: a window into the Tethys oceanic lithosphere
Ionian Abyssal Plain: a window into the Tethys oceanic lithosphere Open
The nature of the Ionian Sea crust has been the subject of scientific debate for more than 30 years, mainly because seismic imaging of the deep crust and upper mantle of the Ionian Abyssal Plain (IAP) has not been conclusive to date. The I…
View article: Applying laser reflectometry to study active submarine faults: the FOCUS project (FOCUS = Fiber Optic Cable Use for Seafloor studies of earthquake hazard and deformation)
Applying laser reflectometry to study active submarine faults: the FOCUS project (FOCUS = Fiber Optic Cable Use for Seafloor studies of earthquake hazard and deformation) Open
Laser reflectometry (BOTDR), commonly used for structural health monitoring (bridges, dams, etc.), will for the first time be applied to study movements of an active fault on the seafloor, 25 km offshore Catania Sicily (an urban area of 1 …