HPx-eos: resources

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On this page we list some resources explaining how the HPx-eos are constructed and calibrated. See also our description of how the HPx-eos are constructed and user guide.

The resources below include both published papers, and some explanations of key points from the papers that can be freely downloaded. We hope the latter are accessible to the general user, and could be used for example in teaching materials. Resources relate to:

For other queries about the HPx-eos or the Holland & Powell dataset, feel free to ask questions in our user discussion group.

The Holland & Powell dataset

  • Version 6: Holland & Powell (2011) J Metamorph Geol 29 333-383
  • Version 5: Holland & Powell (1998) J Metamorph Geol 16 309-343
  • The original papers: ###
  • ###The Holland & Powell dataset: optimisation###

Developments between version 6.0 and 6.33:

ds633-notes.txtDownload

A-x relations

  • Powell & Holland (1993)
  • Holland & Powell (1996)a
  • Holland & Powell (1996)b
  • ###Summary of a-x relation formulation in the HPx-eos###
  • ###What systems should we model in – are more components better?###

Relationship between HPx-eos and dataset

  • Green et al, The HPx-eos thermodynamic models and THERMOCALC: restoring clarity to a popular phase equilibrium modelling tool. In preparation.
  • ### Interpreting the -it file: types of ΔG (“DQF”) terms ####
  • ###The HPx-eos and the Holland & Powell dataset: relationship, ΔG (“DQF”) terms, uncertainties###

Existing sets of HPx-eos

Perple_X users: Jeff Moyen has kindly shared the following Excel spreadsheet that makes it simpler to identify the HPx-eos families in Perple_X. Please note, neither Jeff nor I can guarantee that everything here is correct – it’s still the user’s responsibility!

aX_models_Holland_etal_for_perpleXDownload
  • Igneous set: Holland et al (2018) J Petrol 59 881-900
  • Metabasite set: Green et al (2016) J Metamorph Geol 34 845-892
  • Metapelite set: White et al (2014) J Metamorph Geol 32 261-286
  • Older metapelite set, with dataset version 5.5: White et al (2007) J Metamorph Geol 25 511-527
  • ###Which set should be used when?###

Calibration

  • See individual HPx-eos papers and citations therein; also ###Green et al 2012###
  • Green et al, The HPx-eos thermodynamic models and THERMOCALC: restoring clarity to a popular phase equilibrium modelling tool. In preparation.
  • Green et al, Correlated uncertainties in thermodynamic data and their effect on calculated phase diagrams. In preparation.

Uncertainties

  • ###Powell & Holland …###
  • Powell & Holland (1994)
  • Powell & Holland (2008)
  • ###Palin et al ()###
  • Green et al (2016) J Metamorph Geol 34 845-892
  • Green et al, Correlated uncertainties in thermodynamic data and their effect on calculated phase diagrams. In preparation.

Still have questions?

You are welcome to join our user discussion group and ask there.