ABSTRACT

Petrochemical studies have been a principal approach for compositional classification of igneous rocks, for revealing their conditions of formation based on composition, and verification of petrogenetic models. Special attention to the approach in igneous petrography was paid by numerous non-Russian and Russian geologists, including Zavaritskii [1961], who designed one of the formerly most popular methods of graphic interpretation of petrochemical data. A considerable contribution to the development of petrochemical studies and their genetic interpretation with focus on statistical analysis was made by Belousov [1982], Kutolin [1972], and other geologists.