Towards Deciphering Metamorphic Reaction Kinetics through Porphyroblastic Textural Analysis in the Bugaboo Contact Aureole (South Eastern British Columbia, Canada)

Public Deposited
Resource Type
  • The relative rate of intergranular diffusion and interfacial attachment of chemical species during low-pressure metamorphic reactions is determined through analyzing the texture of porphyroblastic phases in the Bugaboo contact aureole. The observed mineral assemblages are predicted to be in equilibrium from 500-590°C at 1.60 kbar with graphite and a COH-bearing fluid. Porphyroblasts of Bt+And+Crd±Pl within the outer aureole display syn-kinematic growth textures while the inner aureole consists of pre-kinematic Bt+And+Crd+Kfs. Chemical homogeneity of Bt+Crd+prograde and retrograde Chl indicate retrograde chemical equilibration. Mineral chemistries therefore do not provide reliable P-T estimates for prograde metamorphism and the relative rate between reaction processes. The 3D spatial distribution of Bt+Crd from the outer aureole is obtained using XR-μCT to study the effects of metamorphic reaction processes on resultant porphyroblastic texture. Mineral texture is shown to be more reliable over mineral chemistry when deciphering the kinetics of metamorphic processes.

Thesis Degree Level
Thesis Degree Name
Thesis Degree Discipline
Rights Notes
  • Copyright © 2015 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.
Date Created
  • 2015


In Collection: