Séminaires

Detailed Architecture of Magmatic Segments in Afar, Ethiopia

A protracted plutonic construction and differentiation: The Beauvoir rare-metal granite

Paleo-denudation rates of tropical Africa 

The geology and genesis of gem ruby deposits

Deuterium solubility in FeS at high pressure and high temperature

Présentations de 15 minutes de son sujet de thèse :

Dynamic of the marl-limestone variability at the orbital timescale and the Cenomanian-Turonian anoxic event (OAE2): a fresh look with extraterrestrial 3He

Along-strike variation of the strain partitioning within the Apennines as seen from large-scale multi-temporal InSAR analysis

Dans la cuisine de l’arc magmatique de Ryoke (Japon): deformation, métamorphisme et soubresauts magmatiques

Origin of hydrogen isotopic variations in chondritic water and organics

One outstanding challenge in planetary sciences is to understand how km-size planetary bodies (planetesimals) form out of mm-size dust grains in protoplanetary disks. Intuitively, one could expect that planetesimals grow by gradual accretion of smaller objects. In reality, the limited effect on meter-size objects of forces normally enhancing accretion (i.e., electrostatic forces and gravity) and their fast drift towards the central star make this scenario implausible. In this context, magnetic fields present in protoplanetary disks are increasingly regarded as an alternative force acting upon the accretion of planetesimals. However, emerging accretion models that include magnetic effects remain largely unconstrained. Astronomical observations of extrasolar disk magnetic fields are extremely limited, because current technology only allows us to probe exceptionally strong fields with a poor spatial resolution. Fortunately, paleomagnetic studies of meteorites give us access to a record of the magnetic field of a protoplanetary disk (our own solar nebula) with temporal and spatial resolution far superior to those of astronomical observations. I will give an overview of our current knowledge of the solar nebula field as recorded by meteorites. As a case study, I will also present the results of our recent paleomagnetic investigation of the Erg Chech 002 meteorite, which provides us with one of the oldest and best resolved record.

à venir

Prepared for a precursor-free eruption ? The case of Mt Nyiragongo (DR Congo)

à venir

Présentation du livre « Emeraudes, tout un monde »

à venir

Propagation des perturbations climatiques et tectoniques dans les systèmes continentaux, vue par la modélisation numérique

Jeudi 16 Juin 2022 à 13h00 : Mario Fischer-Gödde (Univ. Cologne)

Présentation d’ICEEL
Amphithéâtre du CRPG

Diversity of subduction zone transient deformation events : insights from joint geodetic and seismological analysis