A NEW SOFTWARE PACKAGE FOR RITTMANN NORM CALCULATION

Abstract

MRittmann is a petrological software package for identifying and calculating the normative minerals of volcanic, sub-plutonic, and carbonatite rocks from bulks chemical analyzes. The calibration of the software is built on the Rittmann norm calculation principles, and its calculating results include both hydrous and anhydrous minerals, rock name as well as petrological index such as tau (τ) and degree of oxidation (Ox⁰) of the analyzed samples. The norms obtained from MRittmann are in volume percentages. They are close to the modes and convenience for petrologist to use in graphical purposes in term of plotting the analyzed rock in QAPF double-triangle. The program is written in Delphi for PC and compatibles, and runs under Windows 9x, 2000, NT operating systems. The first version of MRittmann, MRittmann 1.0R was released by Duong The Hung and Dam Quang Minh at the Faculty of Geology, Hanoi University of Science, with all copyrights reserved.