Matrix systematic of the rare-metals granite magmatism and related ore metallization is represented as a table, where geodynamic types of intrusive groups form columns, and genetic types of ore metallization – lines (from rare-metal volcanites, granites and pegmatites to weathering crusts and placers). Cells in crossing of lines and columns include as well known so probable geological-industrial types of ore deposits. Analysis of this table shows which types of deposits may be combined in clusters, and which ones correspond to principally different ore-magmatic systems and, thus, can’t occur in a common cluster (except in combination of diachronous groups). Regularities of the rare-metal granites distribution through geological time correlate with the direct evolution of geodynamic environments in the Earth’s history.
Until now, the degree of study of intrusive massifs, with which associated with a variety of endogenous mineralization, remains insufficient to meet many of the demands of science and practice. In this regard, it is necessary to further improve the methods and techniques of study of these formations and, first of all, methods and techniques of field study of intrusions in the process of their geological survey.
In recent years, the diversity of ideas about the principles of magmatic formations, their relationship with tectonic structures, sequence and conditions of occurrence, the relationship with them mineral deposits, etc. has increased markedly.
As it is known, promising for crystal pegmatites are usually postorogenic, usually interformational, isometric in plan, shallowly eroded massifs of granites of essentially quartz-microcline composition with increased content of volatiles, formed in conditions of shallow depths. Our studies on more than thirty granitoid massifs allow us to refine some of these regional prospecting assumptions ...