Skip to content

Research at St Andrews

On equilibrium in non-hydrostatic metamorphic systems

Research output: Contribution to journalArticle

DOI

Open Access permissions

Open

Author(s)

R. Powell, K. A. Evans, E. C. R. Green, R. W. White

School/Research organisations

Abstract

Metamorphic geology has accumulated a huge body of observation on mineral assemblages that reveal strong patterns in occurrence, summarised for example in the idea of metamorphic facies. On the realisation that such patterns needed a simple explanation, there has been considerable a posteriori success from adopting the idea that equilibrium thermodynamics can be used on mineral assemblages to make sense of the patterns in terms of, for example, the pressure and temperature of formation of mineral assemblages. In doing so, a particularly simple implicit assumption is made, that mineral assemblages operate essentially hydrostatically. Structural geologists have studied the same rocks for different ends, but, remarkably, the phenomena they are interested in depend on non-hydrostatic stress. We look at the effect of such behaviour on mineral equilibria. With adoption of some plausible assumptions about how metamorphism in the crust works, the consequence of minerals being non-hydrostatically stressed is commonly second order in equilibrium calculations.
Close

Details

Original languageEnglish
Pages (from-to)419-438
JournalJournal of Metamorphic Geology
Volume36
Issue number4
Early online date12 Jan 2018
DOIs
Publication statusPublished - May 2018

    Research areas

  • Elastic solids, Equilibrium thermodynamics, Lattice constraint, Non-hydrostatic stress

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. The fate of accessory minerals and key trace elements during anatexis and magma extractio

    Schwindinger, M., Weinberg, R. & White, R. W., 19 Feb 2020, In : Journal of Petrology. In press, egaa031.

    Research output: Contribution to journalArticle

  2. Insights into the compositional evolution of crustal magmatic systems from coupled petrological-geodynamical models

    Rummel, L., Kaus, B., Baumannn, T., White, R. W. & Riel, N., 19 Feb 2020, In : Journal of Petrology. In press, egaa029.

    Research output: Contribution to journalArticle

  3. The truth and beauty of chemical potentials

    Powell, R., Evans, K. A., Green, E. C. R. & White, R. W., 2 May 2019, In : Journal of Metamorphic Geology. Early View

    Research output: Contribution to journalArticle

  4. Generation of Earth's early continents from a relatively cool Archean mantle

    Piccolo, A., Palin, R. M., Kaus, B. J. P. & White, R. W., Apr 2019, In : Geochemistry, Geophysics, Geosystems. 20, 4, p. 1679-1697 19 p.

    Research output: Contribution to journalArticle

Related by journal

  1. The truth and beauty of chemical potentials

    Powell, R., Evans, K. A., Green, E. C. R. & White, R. W., 2 May 2019, In : Journal of Metamorphic Geology. Early View

    Research output: Contribution to journalArticle

  2. New constraints on granulite facies metamorphism and melt production in the Lewisian Complex, northwest Scotland

    Feisel, Y., White, R. W., Palin, R. M. & Johnson, T. E., Aug 2018, In : Journal of Metamorphic Geology. 36, 6, p. 799-819

    Research output: Contribution to journalArticle

  3. Origin, age, and significance of deep-seated granulite-facies migmatites in the Barrow zones of Scotland, Cairn Leuchan, Glen Muick area

    Palin, R. M., Sayed, A. B., White, R. W. & Mertz-kraus, R., Oct 2018, In : Journal of Metamorphic Geology. 36, 8, p. 1071-1096

    Research output: Contribution to journalArticle

ID: 251814521

Top