An algorithm for the construction of petrogenetic grids; application to some equilibria in granulitic paragneisses

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ID: 302744
1984
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Abstract
Sequence proposed: balancing of the reactions and calculation of the slopes, arranging reactions about invariant points, determining and drawing the partially closed net. Geometrical and thermodynamic data are arranged and treated in a series of elementary matrices. This algorithm has been computerized to allow a direct drawing on a graphic plotter of the different invariant points and of the petrogenetic grid and its related residual net. This method is applied to some equilibria involving sillimanite-muscovite-K-feldspar-biotite-garnet-cordierite-orthopyroxene (+ quartz and water) in the systems Al ~2~ O ~3~ -K ~2~ O-FeO-MgO; Al ~2~ O ~3~ -K ~2~ O-FeO, and Al ~2~ O ~3~ -K ~2~ O-MgO. Particular emphasis is put on the geometrical relations between continuous and discontinuous reactions in P-T diagrams and on the physical significance of residual nets.\--Modified journal abstract.
Reference Key
openalex_W2312672218 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors D. Vielzeuf, Pierre Boivin
Journal american journal of science
Year 1984
DOI
10.2475/ajs.284.6.760
URL
https://ajs.scholasticahq.com/article/60316.pdf
Keywords Keywords not found

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