Terre Solide

Unravelling the 3D microarchitecture of Nannoconus Micaliths : From Synchrotron Imaging to Python-Based Modelling

Master 2 - 5 months from January 2027

Candidate profile : We are looking for a motivated Master 2 student with a background in Earth sciences or a related discipline, an interest in paleontology and skills in image processing, three-dimensional modelling and scientific computing. Applicants should have a degree in a field related to paleontology, mineralogy, geosciences or environmental physics. Previous experience with image processing, 3D visualization software or physical characterization techniques is essential. An interest in Python programming and quantitative approaches is highly desirable
Laboratories : ISTerre and Institut Néel
Supervisors : Fabienne Giraud (ISTerre Laboratory), Rajkumar Chowdhury (ENS-Lyon, TotalEnergies), Julio-Cesar da Silva (Institut Néel)
Key-words : Microfossils, physical characterization, image processing, computational modelling
2

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Assessing the robustness of ambient noise correlation imaging of the Mantle Transition Zone : a case study beneath the contiguous United States

ISTERRE - Ondes et structures

Keywords : Ambient noise Seismology, Signal Processing Prerequisites : M2 student with a background in seismology and signal processing
Supervisors : Pierre Boué (contact) pierre.boue univ-grenoble-alpes.fr Piel Pawlowski Ludovic Moreau
The mantle transition zone (MTZ) is a major structural region of the Earth’s interior, marked by mineral phase transitions that are commonly associated with seismic discontinuities at approximately 410 and 660 km depth. An additional discontinuity (…)

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Etude de la microstructure de la glace issue de deux forages effectués dans le massif du Mont-Blanc. 

Ce stage ce situe dans le cadre du projet ANR GlaIA porté à l’Institut des Géosciences de l’Environnement à Grenoble. Ce projet vise à mesurer et modéliser l’anisotropie mécanique de la glace de glacier, en utilisant deux sites de mesure qui sont le glacier d’Argentière et le Dôme du Gouter, dans le massif du Mont-Blanc. La modélisation fera appel au code communautaire Elmer/Ice (https://elmerice.elmerfem.org).
La personne stagiaire aura pour mission d’effectuer des mesures de (…)

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Modélisation d’une dynamo anisotrope fluide

Durée : 5-6 mois

L’objectif de ce stage est de modéliser une dynamo anisotrope au sein d’un fluide en rotation confiné dans une couche cylindrique d’épaisseur très faible, et dont la géométrie s’apparente donc à celle d’une galaxie spirale.

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H/V Variability of Ambient Seismic Noise : Sources, Structure and Polarization

This internship offers the opportunity to work with an original real-world seismological dataset acquired specifically to address questions raised by numerical simulations.
It will combine :
• analysis of real data from a two-month campaign using an array of 30 sensors ;
• use of 3D numerical simulations of ambient seismic noise ;
• signal processing and ambient-noise analysis at both single-station and array scales ;
• joint analysis of H/V amplitude and polarization ;
• contribution to an active research topic concerning the use of H/V curves to constrain subsurface structure and better quantify site effects and strong ground-motion amplification ;
• exploration of a new observable, H/V polarization, which may provide complementary information on laterally heterogeneous structures.
Beyond the analysis of the Volvi site, the internship will aim to determine to what extent variations induced by noise sources can be identified and accounted for, in order to make better use of H/V measurements for the study of site effects.

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