Computer programs have been developed for the Apple Macintosh computer that are designed to facilitate metamorphic petrology calculations and to explore the tectonic significance of P-T-t paths through thermal modeling. Programs for petrologic calculations include Reaction, which calculates reactions among phase components, Tetplot, which plots three- and four-component tetrahedral phase diagrams in single and stereoscopic views, and rhermobarometry, which calculates and plots lines of constant equilibrium constant for real mineral data and includes a large fraction ofall published calibrations of commonly used thermometers and barometers. Program Gibbs is a generalized algorithm to perform P-T-X-M (pressure-temperature-composition-mineral abundance) phase equilibria calculations. Two programs model diffusion in garnet: Garnet Diffusion, which performs Fe-Mg diffusion calculations, and DiffGibbs (siffusion + Gibbs), which performs four-component diffusion calaulations and supports complex boundary conditions for the garnet.

Thermal modeling programs include contact, which simulates contact metamorphism, and Thicken, which simulates one-dimensional crustal thickening of an orogen.

A 200-page program manual and tutorial is available to assist the interested user or to use as the basis of class exercises.

This content is PDF only. Please click on the PDF icon to access.

First Page Preview

First page PDF preview
You do not currently have access to this article.