Normas: um programa para o cálculo de normas e de parâmetros petroquímicos

Abstract

A program for the calculation of several norms and of a large number of geochemical parameters and indexes is herein presented. NORMAS, a revised and updated version of already published programs, was written in Turbo-Basic and belongs to a package of computer programs which is being developed at the IG-USP.These programs can be linked to data banks and aim the treatment of geochemical data of rocks. NORMAS allows the calculation of not only the CIPW, the Catanorm and Alkalic Norm (either in weight percent or cationic form), but of a Mesonorm and an Epinorm as well. The calculated parameters and indexes are currently the most widely used by penologists and are derived from input values expressed in weight per cent of oxides, cationic and molecular proportions, and normative values. An additional and simple routine can display the input data (weight quantities of oxides and elements) and the calculated parameters and indexes as binary diagrams.