Early solar system solids: geochemistry and dynamics
type: Dataset
description: This thesis focuses on the history of early solar system solids. We study the dynamics of chondrite components and find their preservation over a few Ma in the protoplanetary disk to necessitate a dead zone. These dynamics are primarily governed by a gas-solid decoupling parameter S which we conjecture was <1 and >1 when carbonaceous and non-carbonaceous chondrites accreted, respectively. We also study reduced models for the interaction between magnetohydrodynamic turbulence and dust settling and the linear streaming instability. We measure trace element concentrations in chondrule phases in Vigarano, Renazzo, Acfer 187, Bishunpur and Sahara 97096. Olivine in type I chondrules seems to result from batch crystallization whereas pyroxene records rapid cooling rates and is consistent with gas-melt interaction.
issued: 2026-06-01T21:14:41.786853
language: fr
modified: 2026-06-01T21:14:41.786859
contact point: Organization
  fn: CCSD
keyword: accretion
keyword: chondres
keyword: chondrites
keyword: disques-protoplanetaires
keyword: elements-en-trace
keyword: geochimie
keyword: inclusions-refractaires
keyword: infoeu-reposemanticsdoctoralthesis
keyword: instabilite-magnetorotationnelle
keyword: la-icp-ms
keyword: meteorite
keyword: physastrepphysics-physicsastrophysics-astro-phearth-and-planetary-astrophysics-astro-phe
keyword: sduastrepsciences-of-the-universe-physicsastrophysics-astro-phearth-and-planetary-astrophy
keyword: systeme-solaire
keyword: theses
keyword: turbulence
landing page: https://theses.hal.science/tel-00761687

Early solar system solids: geochemistry and dynamics
type: Distribution
format: HTML
issued: 2026-06-01T21:14:41.807715
modified: 2026-06-01T21:14:41.709723
access URL: https://theses.hal.science/tel-00761687

test_moissonnage_selune
type: Agent