Scientific publications

Appearance of the automatic image analyzers, autogoniometers, R-microtomographers and neutronograpjic structure spectrometers rapidly increased the interest to the rock stereology as well as to their consideration using modern synergetical ideas combined with mathematical apparatus of the graph and fractal clusters theories. In the article one can observe the first steps of the revealing and visualization of frustums while macrophisiographical petrographical analysis of several rocks. Frustumation has been firstly revealed in several samples of the Karrara (Toskana, Italy) statuary marble under the influence of short-wave (254 nm) ultra-violet emanation of mercury-quartz high-pressure lamp SVD-120 as a source of luminescence stimulation, and then in numerous samples of several rocks of different genesis. Characteristic dimensions and outlines of the frustums within the rocks investigated are discussed. The smallest frustums by the amount of
mineral grains they contained have been observed in monomineral rocks: datolitic scarn, silicate quartz pegmatite nucleus, galite and statuary marble (about 125-300 grains in volume). The greatest frustums have been observed in polymineral rocks: mediumgrained
amazonite-albitic and pegmatoid rare-metal granites (more than 5000-6000 grains in volume). As it is shown, the later subsequent processes (amazonitization, albitization, and quartzitization in granites as well as ore mineralization development in
alkaline granite) inherited the frusums boundaries as weakened zones within these rocks and to some extent underlined it by their more abundant occurrence.