The possibility of detecting crystal-controlling structures using the method of studying induced thermoluminescence of quartzites sampled from the surface or from drill hole cores was analyzed.

The history of the formation of the doctrine of facies, in the development of which such a significant role belongs to D. V. Nalivkin, is marked, on the one hand, by the expansion of the range of objects covered by this doctrine, and, on the other hand, by a wider and deeper consideration of their features

Quartz veins are natural objects with which industrial concentrations of ore mineralization are associated and which themselves can be bodies of minerals - raw materials for smelting various types of quartz glass.

Expansion of works on the predictive evaluation of ore-bearing territories to the search for mineral deposits in closed areas and at deep horizons led to the development of the doctrine of ore formations ...

Physicochemical conditions of mineral formation in natural conditions rarely remain constant, experiencing gradual or pulsagaon changes, which is reflected in the zonal and vectorial structure of individuals ...

When considering the conditions of crystal nests formation, the question of the dynamics of mineral-forming solutions constantly arises. Repeatedly suggested the stagnant state of solutions inside the nests, which led some researchers to the conclusion about the development of crystal formation processes in the regressive stage of metamorphism in the conditions of a closed physical and chemical system ...

When studying hydrothermal deposits, the attention of researchers, first of all, is attracted by vein bodies diverse in composition and structural and textural features. Clarification of conditions and processes of their formation is in this case the main and rather difficult problem.

The multifaceted and fruitful pedagogical and scientific activity of Vadim D. Nikitin, Professor of the Department of Mineralogy, Doctor of Geological and Mineralogical Sciences, is closely connected with the Leningrad Mining Institute, where he became a major scientist, a great connoisseur of minerals, a brilliant researcher of pegmatites.

Until now, a number of important general questions concerning the conditions of formation of quartz veins and crystal nests developed within the crustalenous fields remain to some extent debatable.

Quartz is an object of wide and versatile research. To date, much attention is paid to the elucidation of the causes of the various types of coloration of quartz. Researchers are attracted not only by the wide variability of tone and density of coloring of this mineral, but also its special nature, manifested in the discoloration (fading) of quartz when heated and in the restoration or enhancement of coloring when irradiating crystals with X-rays or radioactive rays. The coloration of quartz is associated with electronic processes caused by certain defects in the structure of the mineral.

Over time, more and more examples of rational interpretation of ore field structures have been accumulated, which significantly helps further prospecting and exploration works. Over the last ten years, the intensified development of this problem has also begun in application to crustaleniferous fields. Undoubted progress has already been achieved for the fields of crystal-quartz veins (works by A. E. Karyakin, V. A. Smirnova and others in the Subpolar Urals). Deciphering of the structures of the fields of crustalene pegmatites has not yet been completed and there is no unanimous judgment on the methodological basis necessary for this ...

Pegmatite fields confined to the zone of development of Hercynian granitoid intrusions on the eastern slope of the Urals have been studied, as is known, for a very long time. To a large extent, these pegmatites are among those natural objects on the example of which the classical theory of the genesis of pegmatite formations is built ...

The study of the structure of vein quartz can greatly facilitate the identification of the prospectivity of vein bodies for ore-bearing. Most industrially valuable minerals in veins are formed later than quartz, so quartz bears traces of the manifestation of the formation of ore mineralization. Thus, vein quartz structures have been identified at gold deposits, which were formed during the development of later metasomatic mineralization. One of the latest and most complete summaries of these structures is given by N. V. Petrovskaya ...