ESPURT , Nicolas

Forearc systems develop largely offshore above subduction zones between the trenchand the volcanic arc. The associated forearc basins are generally parallel to the trenchand involve vertical movements (subsidence vs. uplift), influencing the dynamics of thewedge. The objectof the study is the Guayaquil-Tumbes forearc basin belonging to...

Highlighting how crustal shortening is accommodated in space and time in fold-thrust belts is a major issue for understanding the long-term tectonic evolution of orogenic systems. In this study, we combine surface and subsurface data to build a 150 km-long sequentially restored balanced cross-section across two superimposed foreland fold-thrust...

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The offshore Tumbes-Guayaquil forearc basin in the accretionary prism of Northern Peru-Southern Ecuador shows evidence of gravity-driven large-scale deformation systems active during the Late Neogene-Quaternary period. Subsurface data and the construction of eight structural cross-sections show that the ~8 km-thick Oligocene-Quaternary...

Reconstruction of eroded mountain belt structures is crucial to produce valid pre-contractional palinspastic restorations and quantify the amount of shortening. In this study, we combine Raman Spectroscopy of Carbonaceous Material (RSCM) thermometry and cross-section balancing technique to propose a reconstruction of the thermal and...

Extensional faults are often observed along subduction zones as a response of a margincollapse. However, their role remain underestimated within the structural evolution offorearc systems. In southern Ecuador, the oblique subduction of the Nazca Platebeneath South America led to the formation of the Cretaceous-Miocene NW-SEChongón-Colonche...

Extensional faults are often observed along subduction zones as a response of a margincollapse. However, their role remain underestimated within the structural evolution offorearc systems. In southern Ecuador, the oblique subduction of the Nazca Platebeneath South America led to the formation of the Cretaceous-Miocene NW-SEChongón-Colonche...

The southern Ecuadorian forearc system is related to the subduction of the oceanic Farallon/Nazca Plate beneaththe continental South American Plate since the Late Cretaceous, and currently evolves with the dynamic of atectonic block called North Andean Sliver. To explore the structural architecture and processes controlling theUpper...

International audience

International audience

In active subduction zones, the sum of the deformation over many seismic cycles accounts for the long-term cumulated deformation of the forearc. Along the Andean coast, several studies have suggested a correlation between the seismic segmentation of the megathrust and the morpho-tectonic segmentation of the forearc. Large megathrust earthquakes...