Phase relationships in high-pressure metapelites. An experimental and naturalistic approach, with geodynamic implications for the Western Alps
type: Dataset
description: A study of high-pressure metapelites from the Western Alps reveals a wide range of metamorphic grades, ranging from a Fe-Mg-carpholite zone, through an intermediate zone of magnesian chloritoid-talc-phengite, to a zone where coesite, pyrope, and ellenbergerite—a new mineral of the pelitic system—are stable. Experimental studies of the MgO-Al₂O₃-SiO₂-H₂O system have enabled the synthesis of Mg-carpholite, Mg-chloritoid, and pyrope, and the determination of their stability and phase relationships between 400 and 800°C, 15 and 40kbar. When applied to natural systems and combined with new dating results (³⁹Ar-⁴⁰Ar), these data are incorporated into an evolutionary model of the Alpine orogeny that involves the subduction of the continental crust to a depth of nearly 100 km
issued: 2026-05-13T23:14:48.131932
language: fr
modified: 2026-05-13T23:14:48.131938
contact point: Organization
  fn: CCSD
keyword: coesite
keyword: ellenbergite
keyword: haute-pression
keyword: high-pressure
keyword: infoeu-reposemanticsdoctoralthesis
keyword: metapelites
keyword: mg-carpholite
keyword: mg-chloritoide
keyword: petrologie
keyword: petrology
keyword: pyrope
keyword: sdustupesciences-of-the-universe-physicsearth-sciencespetrography
keyword: theses
landing page: https://theses.hal.science/tel-00795433

Phase relationships in high-pressure metapelites. An experimental and naturalistic approach, with geodynamic implications for the Western Alps
type: Distribution
format: HTML
issued: 2026-05-13T23:14:48.159012
modified: 2026-05-13T23:14:48.083197
access URL: https://theses.hal.science/tel-00795433

test_moissonnage_selune
type: Agent