JOURDON , Anthony

The Tien Shan is an active mountain belt located at more than thousand kilometres of the closest plate boundary, the Himalayan front. Its Late Proterozoic to Late Paleozoic history takes place during the CAOB accretion which represents the largest accretionary belt in the world. In order to understand how the Paleozoic tectonics of the Tien...

This study proposes a reappraisal of the role of the basement tectonics in the structuration of the Alpine foreland,across the Castellane fold-and-thrust belt located in southwestern Alps. We construct three 30 km length N–Sbalanced cross-sections across the entire fold-and-thrust belt, in order to quantify the amount of horizontalshortening...

Transform margins represent ∼ 30 % of nonconvergent margins worldwide. Their formation and evolution have traditionally been addressed through kinematic models that do not account for the mechanical behaviour of the lithosphere. In this study, we use high-resolution 3D numerical thermo-mechanical modelling to simulate and investigate the...

Evolving mountain belts dynamics is very sensitive to surface processes. The surface processes affect tectonics by enhancing crust exhumation and thermal weakening, and depositing soft yet cold sediments in surrounding basins. While 2D plane strain models approximate cylindrical tectonic structures well, simple 1D mass transfer cannot capture...

International audience

Oblique tectonic, including transpressional and transtensional movements, is a common feature observed at active plate boundaries. Despite being often inferred at the orogen scale, the interpretation of local structural observations in the context of oblique tectonic regimes remains challenging, especially in ductile terrains. During the last...

Geological study of the Khan Tengri and Pobedi massifs highlights two phases of compressional fault displacements. A Late Permian/Triassic displacement phase is highlighted (1) by biotite 40 Ar/ 39 Ar ages of 265-256 Ma, suggestive of cooling of Pobedi mid- crustal granulites during >8 km of top-to-the-north motion of the Pobedi Thrust; (2) by...

In order to address the question of strain localization within continental units during subduction and exhumation, a large-scale portion of an exhumed continental crust was structurally revisited. The Tenda massif (Alpine Corsica) has recorded burial (D1; top-to-the-SW kinematics) down to blueschist-facies conditions followed by exhumation (D2;...

International audience

The tectonic evolution of the Central Asian Orogenic Belt (CAOB) is characterized by the successive accretion of lithospheric blocks, leading to different interpretations about the polarity of subductions during the Paleozoic, the number of microplates and oceanic basins and the timing of tectonic events. This is especially the case in the Tien...

The South Tien Shan (STS) belt results from the last collision event in the western Central Asian Orogenic Belt (CAOB). Understanding its formation is of prime importance in the general framework of the CAOB. The Atbashi Range preserves high‐P (HP) rocks along the STS suture, but still, its global metamorphic evolution remains poorly...

The Permian history of the Central Asian Orogenic belt is marked by large-scale strike-slip faults that reactivate former Paleozoic structures, delineated by widespread alkaline magmatism. The genetic link between the syn-kinematic granitoids emplaced in the Tien Shan range and magmas emplaced within the Tarim Large Igneous Province, and the...