Re-evaluating the P-T-t history of the metamorphic terranes of western New England with novel thermobarometry methods

Authors
Wolfe, Oliver Maxwell
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Other Contributors
Spear, Frank S.
Watson, E. Bruce
Roecker, Steven W.
Thomas, Jay B.
Issue Date
2019-05
Keywords
Geology
Degree
PhD
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This electronic version is a licensed copy owned by Rensselaer Polytechnic Institute, Troy, NY. Copyright of original work retained by author.
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Abstract
Affinities for garnet nucleation were calculated as the difference between the free energy of a fictive garnet composition based on the matrix assemblage and the free energy of the nucleated garnet. The calculated nucleation affinity varied from 300–600 kJ/mol O for St-Ky grade samples. These results suggest that the assumption that metamorphism proceeds as a sequence of near-equilibrium conditions cannot, in general, be made for regional metamorphic terranes. This body of work agrees with numerous recent studies showing that garnet producing reactions must be overstepped in order to for garnet to nucleate.
Description
May 2019
School of Science
Department
Dept. of Earth and Environmental Sciences
Publisher
Rensselaer Polytechnic Institute, Troy, NY
Relationships
Rensselaer Theses and Dissertations Online Collection
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