GRESENS-92 - A SIMPLE MACINTOSH PROGRAM OF THE GRESENS METHOD

The Gresens method allows quantitative study of the volume change and the mass transfer of chemical components in rocks during alteration pr ocesses. This method has been programmed in Think Pascal (version 3.02 ) for Macintosh microcomputers. The program compares the densities and the chemical analyses of the original and the altered rock and calcul ates volume change and the gains and losses of oxides or elements (maj or and trace) when any chemical component is assumed immobile during a lteration. It plots composition volume diagrams and isocon diagrams th at allow a reference frame to be selected for mass-balance calculation s. Results can be stored in Tab-Text-Files and MacPaint files that can be accessed with spreadsheet, word processor, or graphic software.