Unit:
Department of Geology and GeoenvirommentLibrary of the School of Science
Author:
CHATZITRIANTAFYLLOU VASILIKI
Supervisors info:
ΔΗΜΗΤΡΙΟΣ ΚΩΣΤΟΠΟΥΛΟΣ ΑΝΑΠΛΗΡΩΤΗΣ ΚΑΘΗΓΗΤΗΣ ΤΜΗΜΑ ΓΕΩΛΟΓΙΑΣ ΚΑΙ ΓΕΩΠΕΡΙΒΑΛΛΟΝΤΟΣ ΕΚΠΑ
Original Title:
Temperatures of equilibration and oxygen fugacity conditions prevailing in the oceanic upper mantle at different tectonic settings.
Translated title:
Temperatures of equilibration and oxygen fugacity conditions prevailing in the oceanic upper mantle at different tectonic settings.
Summary:
This thesis presents a comprehensive study of the equilibration temperatures and oxygen fugacity conditions prevailing in the oceanic upper mantle across different tectonic settings, offering significant information on its chemical composition and dynamics. Through a detailed analysis of peridotites from mid-ocean ridges, metasomatized peridotites, and ophiolitic peridotites from supra-subduction zones, this study examines the impact of tectonic setting on various mantle processes. By calculating the temperatures of equilibration and oxygen fugacities of the samples, information was obtained regarding the thermal history and redox state of the upper mantle. The thesis reveals significant variations in temperature and oxygen fugacity, influenced by the tectonic environment, mantle source composition, partial melting, and fluid interaction. The results pinpoint the complex processes that occur in the oceanic upper mantle, contributing to its formation and evolution.
Main subject category:
Science
Keywords:
Temperatures of equilibration, Oxygen fugacity, Oceanic upper mantle, Petrology, Mantle geochemistry
