A5012644152- earthquake and tectonic studies
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Geology and Paleoclimatology Research
- Geological and Geophysical Studies
- Geological formations and processes
- Geophysics and Gravity Measurements
- Coral and Marine Ecosystems Studies
- Geological and Geophysical Studies Worldwide
- Hydrocarbon exploration and reservoir analysis
- French Urban and Social Studies
- Education, sociology, and vocational training
- Geological and Tectonic Studies in Latin America
- Multiculturalism, Politics, Migration, Gender
- Geological Studies and Exploration
- Geological Formations and Processes Exploration
- Pacific and Southeast Asian Studies
- Geomagnetism and Paleomagnetism Studies
- Philosophy, Sociology, Political Theory
- Oceanographic and Atmospheric Processes
- Quantum, superfluid, helium dynamics
- Health, Medicine and Society
- Linguistics and Discourse Analysis
- Geochemistry and Geologic Mapping
- Pleistocene-Era Hominins and Archaeology
Université Grenoble Alpes
2015-2024
Institut des Sciences de la Terre
2015-2024
Université Gustave Eiffel
2015-2024
Institut de Recherche pour le Développement
2017-2024
Centre National de la Recherche Scientifique
2015-2024
Université de Lorraine
2009-2023
Centre lorrain de recherches interdisciplinaires dans les domaines des littératures, des cultures et de la théologie
2000-2023
Université Savoie Mont Blanc
2016-2022
Institut des Textes et Manuscrits Modernes
2006-2021
Université de Montréal
2020
Abstract. Global mean sea level is an integral of changes occurring in the climate system response to unforced variability as well natural and anthropogenic forcing factors. Its temporal evolution allows (e.g., acceleration) be detected one or more components. Study sea-level budget provides constraints on missing poorly known contributions, such unsurveyed deep ocean still uncertain land water component. In context World Climate Research Programme Grand Challenge entitled Regional Sea Level...
Tectonic models for the Oligocene–Miocene development of Himalaya mountain range are largely focused on crustal-scale processes, and developed along orogen-perpendicular cross sections. Such assume uniformity length Himalaya, but significant along-strike tectonic variations occur, highlighting a need three-dimensional evolutionary Himalayan orogenesis. Here we show strong temporal correlation southward motion Indian slab relative to overriding orogen, lateral migration detachment, subsequent...
Mountain building at convergent margins requires tectonic forces that can overcome frictional resistance along large‐scale thrust faults and support the gravitational potential energy stored within thickened crust of orogen. A general, dynamic model for this process is still lacking. Here we propose mountain belts be classified between two end‐members. First, those “slab pull” type, where subduction mainly confined to upper mantle, rollback trench motion lead moderately thick crustal stacks,...
3D spherical dynamic models show how the force balance between tectonic plates and mantle evolves over supercontinent cycles.
Abstract It is widely accepted that sea level changes intermittently inundated the Sunda Shelf throughout Pleistocene, separating Java, Sumatra and Borneo from Malay Peninsula each other. On this basis, dynamics of biodiversity hotspot Sundaland consistently regarded as solely contingent on glacial oscillations, with interglacial highstands creating intermittent dispersal barriers between disjunct landmasses. However, recent findings geomorphology currently submerged shelf suggest it...
Our capability to reconstruct past landscapes and the processes that shape them underpins our understanding of paleo-Earth. We take advantage a global-scale landscape evolution model assimilating paleoelevation paleoclimate reconstructions over 100 million years. This provides continuous quantifications metrics critical Earth system, from global physiography sediment flux stratigraphic architectures. reappraise role played by surface in controlling delivery oceans find stable sedimentation...
SUMMARY A semi-analytic, 3-D model for subduction within a Newtonian viscous upper mantle provides dynamically consistent means of computing stress, trench motion and slab geometry in systems. Although negative buoyancy the basic driving force subduction, slabs that extend from surface to base are oversupported by stresses shallow (<100‐150 km) undersupported at greater depth mantle. These deeper parts system act as an ‘engine’ while shallower ‘brake’ on motion; migration rates reflect...
The Chile Triple Junction (CTJ) episodically migrated northward during the past 14 Ma from 54°S to its present‐day position at 46°30′S, as different almost trench‐parallel spreading segments entered in subduction. This migration resulted opening of an asthenospheric window below Patagonia, inducing a disturbance regional mantle convection. On overriding plate, middle Miocene time corresponds major change central Patagonian basin dynamics, with transition subsidence generalized uplift....
Mantle flow likely supports up to 2 km of long-wavelength topographic relief over Earth's surface. Although the average this dynamic support must be zero, a net deflection ocean basins can change their volume and induce sea-level change. By calculating topography using global mantle model, we find that continents preferentially conceal depressed associated with downwelling, leading seafloor uplift ~90 ± 20 m positive offset. Upwelling is currently amplifying causing 1.0 m/Ma rise, depending...
Research Article| January 04, 2019 Subsiding Sundaland A.-C. Sarr; Sarr 1ISTerre, Université Grenoble Alpes, CNRS, 38058 Grenoble, France2Laboratoire des Sciences du Climat et de l’Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Paris Saclay, France Search for other works by this author on: GSW Google Scholar L. Husson; Husson P. Sepulchre; Sepulchre 2Laboratoire A-M. Pastier; Pastier France3Géosciences Rennes, Rennes-1, 35042 Rennes Cedex, France4Laboratoire Planétologie Géodynamique, Nantes,...
The long-term diversification of the biosphere responds to changes in physical environment. Yet, over continents, nearly monotonic expansion life started later early part Phanerozoic eon1 than marine realm, where instead number genera waxed and waned time2. A comprehensive evaluation geodynamic climatic forcing fails provide a unified theory for pattern evolution on Earth. Here we couple climate plate tectonics models numerically reconstruct Earth's landscape entire eon, which then compare...
In the Central Andes, crustal thickness is not well correlated to upper shortening. Only little shortening documented in crust of 60–65 km‐thick Altiplano plateau, whose thickening and uplift were delayed with respect earlier greater adjacent Western Eastern Cordilleras. Because variations induce horizontal stress gradients cause flow, a thickness‐dependent channel flow modeled here applied Andes. situ assumed for both cordilleras, while generated by lateral from these overthickened domains....
Our 3D modelling study shows that the presence of lithospheric plates around a subducting plate has significant influence on subduction dynamics, in particular trench retreat rate, slab dip, and lateral shortening plate. Neighbouring prevent unrealistic behaviour with no need for complex rheologies. Because, at Earth's surface, form continuous shell, they should not be neglected.
[1] New lithospheric analog models of oblique rifting presented here capture the main characteristics natural rifts and provide insights into fault evolution, basin segmentation, mantle exhumation occurring during rift localization. We present two models: one with a preexisting weakness (model B) another no zone A). Both have an obliquity about 40°. The results are as follows. (1) populations, especially early stages deformation, composed faults that in strike largely intermediate between...