16 Nov Post-doctoral position – COLLISEA Project – Reconstructions of the South China Sea and SE Asia
Post-doctoral position at the LG-ENS
ANRS COLLISEA – « Collision Initiation in SE Asia »
WP4 = Plate Reconstructions of the South China Sea and SE Asia
Manuel Pubellier (CNRS) and Matthias Delescluse (ENS)
The physical parameters at play at collision initiation have been so far indirectly determined based on tectonic reconstruction and processes fossilized in orogens. Only a limited number of orogens show these processes presently in action and preserve markers of this specific stage, which is essentially a transient phenomenon. COLLISEA project’s main objective is to fill this knowledge gap by quantifying the factors controlling initial continental accretion in SE Asia, Philippines and Taiwan, where this process is ongoing. COLLISEA project (ANR) focuses on the tectonically active arc-continent collision, stretching from Taiwan to Philippines, where pre-accretionary structures and subduction-collision transitions are available. Relying on promising new seismic waveforms from recently deployed dense stations network in active Taiwan arc-continent collision and newly acquired and large geochronological data across the Philippines arc, COLLISEA will permit to make a timely step forward in our knowledge of collision initiation.
The 2 years Post-Doctoral fellow will play a key role in the WP 4, and as such, will refine the PSP/EU kinematics accounting for internal deformation of EU plate. Special attention will be given to, 1) reconstructions of SCS/Proto-SCS and PSP/Proto-PSP; 2) relationships between convergence obliquity, and onset of arc-continent collision between EU and PMB (and Taiwan), 3) Origin of upper Mesozoic, units deformed in the PSP arc from Palawan to Taiwan collision. Tools will be seismic lines analysis, back-tracking restoration of crustal thickness, and GPlate reconstructions.