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A large group of commercial minerals known as ?industrial minerals? is used worldwide. Industrial minerals are understood as useful mineral deposits, i.e. all minerals extracted from the earth, except for energy raw materials, metals, water and gemstones, and used for industrial purposes owing to their physical, chemical and mechanical properties. The geological structure of the continental eastern Fennoscandian Shield (Karelian Region), the basement of the East European Platform, is controlled by its long geologi...

High qualitative and quantitative requirements for dimension stone on the building materials market make producers update the methods used currently to assess natural fracturing in areas of interest at various levels when prospecting potential zones. As most well-exposed areas are already being quarried, new areas are most efficiently prospected using statistical and mining-geometric methods and the data obtained are analyzed. Locating dimension stone prospects is a multi-stage process. Analysis of large areas per...

Simple and cheap methods for the study of building stone deposits for the production of blocks of commercial size can be used to make geological work more efficient. However, physical processes in a massif are hard to understand when doing geophysical research, and the effect of microstructural parameters, mainly the microfracturing of rocks, on geophysical field indices is poorly understood. The authors have studied the impact of microfracturing on the physico-mechanical properties on coarse- to giant-grained rap...

Until recently, the effect of various factors, which are due to the stressed state and physical weathering of a massif on the development of microfractures in igneous rocks in elastic-brittle state has been poorly studied. Therefore, the genesis of fractures of various sizes cannot be revealed and the strength of the massif cannot be reliably forecasted. The authors have assessed the conditions and formation pattern of microfractures in rapakivi granites from the Salmi massif, the Fennoscandian Shield, which displ...