Фосфаты Стрельцовского рудного поля Юго-Восточного Забайкалья (Часть II)

Abstract

The reliability of the conclusions of geologists who created the largest uranium ore base in the country on the territory of the Streltsovsky ore field (SRP) in South-Eastern Transbaikalia, about the spatially isolated phosphate mineralization and powerful industrial mineralization belonging to a single final stage of Late Mesozoic tectonomagmatitic activation, is clarified. The relevance of the research is the need to study the geological materials on the PSA and the surrounding area to assess the prospects for involving in the exploitation of phosphate mineralization developed on the flanks of uranium deposits developed under the state program of the TOP. The object of study is the “blind” Argun and Zherlovoe deposits and their western flanks on the surface, and the subject is the phosphate mineralization developed in the block of terrigenous-carbonate rocks. The purpose of the research is to clarify the time and features of the phosphates’ formation, and the task is to assess the industrial significance of phosphate mineralization to make a decision on the feasibility of additional study of this scarce raw material. The methodology of scientific research is based on the interpretation of geological facts given in the literature and stock materials, use of concepts, terms, creation of hypotheses and their consequences, consistency of the comparison of which with the established facts determines the relatively high reliability of geological results. The author has used a descriptive method that takes into account a system of interrelated consistent positions, and a method of theoretical modeling, which raises the strategic goals of nature cognition to a higher scientific level. The results of the research are presented in three articles (parts). The second part describes the characteristics of uranium-molybdenum deposits, phosphates of the region and PSA, and the Talan manifestation of apatites. It is established that the Talan manifestation, despite the limited volume of the estimated reserves, has extremely favourable conditions for the economic feasibility of its study and, possibly, industrial development. Phosphate mineralization belongs to the complex of Precambrian metamorphic rocks. Apatite-carbonate and apatite-silicate subtypes of the phosphate sorption-biogenic metalliferous formation combine the promising second and third most important industrial types of apatite deposits. It is recommended to perform geological exploration of the estimated stage on an area of 20 hectares, paying special attention to the development of technology for processing mineral raw materials and to test the electrothermal method for producing effective fused phosphate-magnesium fertilizers used in the project of the Seligdar mining and Chemical Complex