T. Simon-Labric

T. Simon-Labric
CGO · Centre de Geologie de l'Oisans

PhD

About

28
Publications
9,689
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776
Citations
Additional affiliations
April 2015 - December 2025
CGO
Position
  • Geologist
June 2013 - July 2015
University of Lausanne
Position
  • PostDoc Position
June 2013 - March 2015
University of Lausanne
Position
  • Researcher

Publications

Publications (28)
Article
Full-text available
The impact of subduction processes on surface uplift and relief building in the Andes is not well understood. In northern Peru, we have access to a modern flat subduction zone (3 degrees-15 degrees S) where both the geometry and timing of the flattening of the slab are well constrained. Some of the highest Andean peaks, the Cordillera Blanca (6768...
Article
Full-text available
Physical and numerical simulations of the development of mountain topography predict that asymmetric distributions of precipitation over a mountain range induce a migration of its drainage divide toward the driest flank in order to equilibrate erosion rates across the divide. Such migration is often inferred from existing asymmetries, but direct ev...
Article
Earth’s surface topography is generated by tectonically induced variations in crustal thickness combined with erosion and, to a lesser degree, by vertical stresses caused by convection in the underlying mantle. Rock hardness and resistance to erosion are also commonly thought to influence topography because hard rocks, such as granites and basalts,...
Article
Full-text available
Strike-slip faults juxtapose crustal blocks with different geodynamic origins and potentially different thermal structures. Large-magnitude horizontal displacements along these faults may juxtapose terranes of contrasted thermal regimes. The effect of strike-slip faulting on the cooling histories that are derived from thermochronological dating rem...
Preprint
Full-text available
Orogens and volcanic arcs at continental plate margins are primary surface expressions of convergent plate tectonics. Although it is established that climate affects the shape, size, and architecture of orogens via orographic erosion gradients, the crustal upwelling of magmas and location of volcanic arcs have been considered insensitive to erosion...
Conference Paper
Full-text available
Late Miocene calc-alkaline intrusions in the back-arc of Southern Patagonia mark an eastwardmigration of the arc due to accelerated subduction velocity of the Nazca plate or slab flatteningpreceding active ridge subduction. Amongst these intrusions are the emblematic Torres del Paine(51°S) and Fitz Roy (49°S) plutonic complexes, crystalised at ca....
Article
Knowledge of the Guiana Shield evolution during the Gondwana break‐up is key to a better understanding of craton dynamics and margin response to transtensional opening. To improve this knowledge, we investigated the dynamics and thermal evolution of French Guiana, using several low temperature thermochronology methods applied to basement rocks, inc...
Poster
Full-text available
The influence of Atlantic opening on landscape evolution of the Guyana shield is poorly known, mostly due to the absence of quantitative data. More in the south-east, apatite fission track data have been interpreted as recording a strong erosion phase, started at the end of the normal passive margin setting up at ~150 Ma, and up to 50 Ma. Whereas t...
Article
Despite a long history of plate convergence at the western margin of the South American plate that has been ongoing since at least the Early Paleozoic, the southern Peruvian fore-arc displays little to no evidence of shortening. In the light of this observation, we assess the deformation history of the southern Peruvian fore-arc and its geodynamic...
Chapter
DefinitionThe use of thermochronometers having closure temperatures less than 200 °C that allow evaluation of the timing of geomorphic events or rates of landscape change caused by processes such as uplift, incision, exhumation, erosion, transport, and sedimentation.IntroductionContinental topography links to some of the most fundamental questions...
Article
Full-text available
1] Strike-slip plate boundaries juxtapose crustal blocks that may have different geodynamic origins and therefore different thermal structures. Thermo-kinematic modeling of this type of strike-slip plate boundary predicts an asymmetric signature in the low-temperature thermochronologic record across the fault. Age-elevation profiles of zircon (U-Th...
Article
Geological observations of mantle flow-driven dynamic topography are numerous, especially in the stratigraphy of sedimentary basins; on the contrary, when it leads to subaerial exposure of rocks, dynamic topography must be substantially eroded to leave a noticeable trace in the geological record. Here, we demonstrate that despite its low amplitude...
Article
Full-text available
Our study deals with the crustal deformation produced by the migration of a triple plate junction implying a subduction zone and a transform fault system separating two continental plates. We have chosen the Caribbean-North America-Cocos triple junction as a case study. The Polochic-Motagua fault system are part of the sinistral transform boundary...
Article
Full-text available
The northwestwards-directed Eocene propagation of the Western Alpine orogen is linked with (1) compressional structures in the basement and the Mesozoic sedimentary cover of the European foreland, well preserved in the External Zone (or Dauphiné Zone) of the Western Alps and (2) tectono-sedimentary features associated with the displacement of the e...
Article
A growing body of evidence indicates that many igneous bodies result from the agglomeration of discrete smaller intrusions. Repeated injection of small magma intrusions in the crust results in a temperature structure that is fundamentally different from that resulting from the quasi-instantaneous emplacement of a single large magma body and could s...
Article
Full-text available
The formation and evolution of relief in subduction-related orogens result from a variety of processes acting at different scales of time and space. The interplay between tectonics and erosion (river incision, glacial erosion…) is generally the principal contributor to the relief development. However, Earth's surface topography is also shaped by ma...
Article
PECUBE is a three-dimensional thermal–kinematic code capable of solving the heat production–diffusion–advection equation under a temporally varying surface boundary condition. It was initially developed to assess the effects of time-varying surface topography (relief) on low-temperature thermochronological datasets. Thermochronometric ages are pred...
Article
Full-text available
The initial propagation of the Western Alpine orogen was directed northwestwards, as shown by basement-involved and Mesozoic sedimentary cover compressional structures, and by the early foreland basins evolution. The crystalline basement of the Dauphiné zone recorded three shortening episodes : pre-Priabonian deformation D1 (coeval with the Pyrenea...
Article
Full-text available
The Polochic-Motagua fault systems (PMFS) are part of the sinistral transform boundary between the North American and Caribbean plates. To the west, these systems interact with the subduction zone of the Cocos plate, forming a subduction-subduction-transform triple junction. The North American plate moves westward relative to the Caribbean plate. T...
Article
Full-text available
Deeply incised drainage networks are thought to be robust and not easily modified, and are commonly used as passive markers of horizontal strain. Yet, reorganizations (rearrangements) appear in the geologic record. We provide field evidence of the reorganization of a Miocene drainage network in response to strike–slip and vertical displacements in...
Article
Full-text available
It has long been recognized that drainage diversion can trigger erosional pulses, removing significant amounts of rock, releasing sediments and amplifying local relief. Most captures are the sudden, discrete manifestation of the progressive adjustment of drainage networks to various controlling factors. Although numerous instances of past or ongoin...
Article
Most studies of climate-tectonic interactions have focused on steady state orogens that evolve through orogen-normal convergence. Yet, most orogens have a major component of strike skip (wrenching). Although river captures occur in various kinds of geomorphic settings, they are frequently produced in such orogens by strike-slip faulting. The impact...
Article
Full-text available
Direct absolute dating of the Penninic Frontal Thrust tectonic motion is achieved using the 40Ar ⁄ 39Ar technique in the Pelvoux Crystalline Massif (Western Alps). The dated phengites were formed syn-kinematically in shear zones. They underline the brittle-ductile stretching lineation, pressure-shadow fibres and slickensides consistent with underth...
Article
Most studies of climate-tectonic interactions have focused on steady state orogens that evolve through orogen-normal convergence. Yet, most orogens have a major component of strike skip (wrenching). Although river captures occur in various kinds of geomorphic settings, they are frequently produced in such orogens by strike-slip faulting. The impact...
Article
Full-text available
The formation of the western Alpine arc started during the earliest Oligocene, after a drastic kinematic change in the collisional regime. (A) Previously, south-southeast dipping subduction of the European lithosphere (including Briançonnais) underneath Adria resulted in an underfilled flexural basin propagating towards the north-northwest on the E...
Article
Full-text available
Along transpressive orogens, both range-transverse and range-parallel motions influence drainage network evolution. Range-parallel motions promote stretching of drainage networks, river lengthening or shortening, and sudden shortenings by river capture. Range-transverse motions induce river course shortening or lengthening, and generates stronger r...

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Projects

Projects (2)
Archived project
Effect of lateral faulting on drainage network evolution: driving processes. Field target: Guatemala