Prospects of Karelian carbonate deposits for the production of correcting additives to cement blend based on upper devonian marls from the russian platform

The possible use of carbonate rocks from some Karelian deposits for the production of correcting additives to raw cement blend from cement occurrences in the Leningrad and Novgorod districts (exemplified by the Babino occurrence) with insufficient standards for unaided exploitation are discussed.

Preliminary assessment of the radiation-hygienic situation at the Aganozero complex deposit

The Aganozero chromium ore deposit, located in the Pudozh District, Karelia, is a complex object for ore and non-metalliferous useful minerals such as chromium ores, platinoids, chrome spinellids as well as Mg-bearing and high-Mg raw materials, e.g. serpentinite, olivinite, dunite and building materials. The primary goal of the present paper is to assess the radiation-hygienic situation at the Burakovian-Shalozero-Aganozero massif, which comprises the Aganozero deposit. Our assessment is essential in connection with the Megaproject to be launched in Karelia, where the Aganozero deposit will play the key role. Our assessment is based on the field and laboratory studies conducted by the authors with regard for the data obtained for this deposit by the Karelian Geological Survey and the appraisal of the radiation-hygienic situation in the Pudozh District done earlier by Nevskgeologia GTP, VSEGEI.

Obtaining of synthetic titanosilicate with the korobitsenite structure

The article presents the study results of obtaining a composite hydrated titanosilicate precipitate and its use for the synthesis of alkaline titanosilicates.

Analysis of fluid inclusions in vein quartz of the Fenkina-Lampi deposit by gas chromatography

The composition and content of fluid inclusions in the main structural and technological types of vein quartz of the Fenkina-Lampi deposit were studied by gas chromatography. It is shown that H2O dominates (90–99%) in the gases composition released from quartz under heating to 1000°C, CO2, CO, N2 and hydrocarbon compounds contents are much less. Quartz is characterized by high gassing in the high-temperature region (600–1000°C) comparable to gassing in the low-temperature interval (100–600°C), which is a negative indicator of the quality of quartz as a raw material for high-quality glass melting. It is necessary to develop a special purification technology for this quartz, which will take into account the features of its saturation with gas-liquid inclusions.

On the rational use of rocks upon the exploitation of the Nigozero deposit

A scheme of anthraxolite extraction, based on the mineralogo-technological studies of Nigozero tuffaceous sandstone, enriched in anthraxolite concretions, was proposed. The authors recommend using radiometric methods to produce commercial ore to be dressed for anthraxolite during the subsequent integrated exploitation of the deposit.

Mineralogical materials study (manufacturing ceramic products)

Basic mineralogical materials study as a science concerned with the study of the principles of selecting and manufacturing of materials from raw minerals are discussed. The results of the study of ceramic bricks, conducted to forecast blend composition and roasting regime for obtaining the various exploitation properties of the finished product are reported.

Ultramafic rocks of the Aganozero chromium ore deposit (South Karelia) as a non-conventional magnesium-silicate raw material for the production of new ceramic materials

Ultramafic rocks of the Aganozero chromium ore deposit located in South Karelia are of practical interest as a high-Mg raw material for industrial application. The preliminary results of the study of high-Mg rocks and minerals from the Aganozero deposit for the production of new materials are reported. The high technological level and economic efficiency of the ceramic materials produced, based on Karelia’s high-Mg rocks and industrial minerals, were achieved by reducing energy consumption and simplifying the technological process. The practical application of local types of mineral products will increase the raw materials potential for the production of various types of refractories and industrial ceramics.

Karelian talc as a raw material: practical application and potential contribution to Russian mineral raw material reserves

Talc is a unique natural material. Some talc-bearing rocks, e.g. soapstone, are also useful minerals. There are talc deposits on the Fennoscandian Shield. The main potential talc resources and reserves are in the Karelian Craton, which is part of the shield. Talc deposits in the Finnish extension of the craton are being mined in the Kainuu Schist Belt and soapstone deposits in the Suomussalmi-Kuhmo Greenstone Belt. The Karelian portion of the craton seems to be more promising for talc-bearing deposits, because favourable rock complexes of greenstone belts are more common there. The revival of Karelia’s economic, scientific and industrial potential for the prospecting, exploration, study, appraisal and exploitation of the talc deposits could provide an impetus to Russsia’s and Karelia’s industrial development on a new higher level.

Сharacterization of copper-nickel mineralization of metagabbroids (North Timan)

The article discusses the comparison of the mineralogical and technological properties of minerals and the whole copper-nickel ore manifestations of the "Blizhneye" and "Dal'neye" Bugrovskaya area. According to the results of the study, rock-forming and secondary minerals of ore-bearing rocks were established. Characterized sulfide minerals and their associations. In general, the complexity of ores, including precious metal mineralization, was noted. According to the obtained mineralogical data, possible methods of ore enrichment are predicted.

Biotechnological bases of use of natural mineral glauconite in soil-forming processes at development of technogenic massifs and liquidation of enterprises on extraction of minerals

To initiate the process of soil formation, it is necessary to introduce a culture of microorganisms capable of improving mineral nutrition, plant growth and resistance to adverse factors, regardless of the mineralogical composition of the surface. The advantage of the developed methods is the multifunctionality of the sorbent, which is an abiotic catalyst: the dangerous agent binds physically due to the formed fine-porous structure, and chemically due to the ion exchange processes occurring due to the nature of the layered glauconite silicate. The viability of immobilized glauconite bacterial cells of Agrobacterium radiobacter 204, Rhizobium leguminosarumbiovartrifolii, Flaviobacterium L 30 fulvum, Pseudomonas aureofaciens 1393 BS, amounted to no less than 4 months., while the original biological products are stored no more than 1 month. Key words: glauconite, sorbent, sorption capacity, heavy metals, microorganisms, immobilization on inorganic carriers.