The article covers theoretical justification for the analysis of the regular pattern of gold distribution within ores of hydrothermal gold deposits. The analysis is based on principles of entropy dependence of gold concentration distribution variability in different physical-chemical conditions of oreforming processes providing certain goldbearing parageneses of ore minerals. At this rate, distribution of gold concentrations in an ore paragenesis is subordinated to the log-normal rule, and, subsequently, on the binary (lognormal) scale of gold concentrations this certain paragenesis of ore minerals is reflected as the frequency maximum of one or another class of this scale. Using some methodical steps in processing channel sampling data, it is possible to reveal or confirm the presence of several gold- bearing mineral associations and compare their volumetric and quantitative ratios in orebodies and blocks of mining. Results of the performed analysis of gold concentration distribution in ores of different hydrothermal gold deposits, including the polystadial ones, prove the validity of this technique for estimation of the gold dis-tribution in ores with the purpose of carrying out supplementary study of the genetic nature of ores, and their mining feasibility.
Peculiarities in distribution of concentrations and mass shares of gold in its ores in recoverable gold deposits should be considered as indicators of the genetic nature of gold mineralization. Practical application of the revealed distribution allows the new estimating of the nature of those gold concentrations.
A primary vein-disseminated ores of major gold deposit with stockworks and crushed veins in carbonaceous shale rocks can be exposed to metamorphism what with duration and multiplicity of ore-forming stages. A regrouping of gold takes place in ores with formation of lager gold grain under the influence of metamorphism. A metamorphosed vein-disseminated ores should be united in one whole industrial type.
The rule of the entropy distributiveness for mass of the metal in gold ores is detected at different scale levels. This regularity is resulted as a consequence of redistribution of the gold and host rocks after their primary conditions. Revealing of those rules may allow reviewing the notions on nature and genesis of gold mineralizaition.
The project objectives are to justify modern systems of balanced reproduction and use of forest resources, cyclically and structurally linking the processes of reforestation, forest care and forest use in a single complex; to develop new methods and technologies of sustainable nature management, expanding the integrated and low-waste use of natural resources; characterization and forest effectiveness of promising technologies of primary use, forest care, reforestation; assessment of ecological and biological diversity. The research is designed to provide a comprehensive assessment of modern reforestation, tending and forest use methods and technologies; to reveal the structural changes in the forest environment caused by the use of the mentioned technologies and the most perspective nature- and resource-saving technologies of reforestation and forest use; to determine the possible options to optimize the management regime in the forest reforestation-forest use cycle; to develop systems of balanced complex reproduction and use of forest resources.
The article considers the main directions of research in the analysis of the regularities of the location, properties and state of the main types of deposits of solid minerals in Russia. A summary of the available data on the main patterns of variability of both individual minerals and aggregates in the main types of endogenous ore deposits is made. Mineralogical features of large and unique deposits connected with granite magmatism are analyzed. It is concluded that their formation was determined by the long-term evolution of deep fluid systems serving as a means of mantle-core interaction and redistribution of matter in the Earth's crust. The principles of granite pegmatites analysis and methods of its carrying out are offered. The computational modeling of the processes of structure formation during magma solidification using the Monte Carlo method has been carried out. The possibilities of application of fractal analysis to solve the problems of ore geology are investigated. Possibilities of quantitative assessment of morphology of ore bodies are shown. Methods of studying and modeling of anomalous geochemical fields associated with mineral deposits are outlined. Tasks of geological exploration and prospecting works in connection with the further development of the coal industry are given.
The state of raw mineral gold base of Russia as the foundation of further gold extracting is discussed.
The genetic informativeness of the structures of metal reserves of gold-bearing ores subjected to intramineralization metamorphic transformations is shown. By the nature of changes in reserve structures it is possible to judge about qualitative and quantitative features of ore-forming process.
In the territory of the At-Uryakh-Shturmov zone there were three richest placers of Kolyma, now almost completely mined out. Native ore occurrences identified in the area of the zone are not comparable to the placers. Nevertheless, the regularities in the distribution of ore occurrences, established as a result of the conducted research, show that their number is far from being exhausted by the known ore occurrences, and, consequently, significant metal resources may be concentrated in them. However, in order to turn these resources into real reserves, it is necessary to take into account the laws outlined in the proposed article when prospecting and exploring these ore occurrences.
Among the gold deposits of the North-East of the USSR, attributed to the gold-quartz formation, a special morphological type of mineralization in dyke rocks.
The territory of the south-eastern part of the Inyali-Debinsky synclinorium is known as the main mesozoid gold-ore zone of the North-East of the USSR. Systematic geologic studies have been conducted here for more than half a century.
An important point of geological and industrial evaluation of gold deposits is the establishment of the distribution of mineralization in ore bodies and, in particular, the identification of areas with the highest concentration of ore and metals - ore pillars, which contain a significant proportion of all reserves ...
One of the important points of geological and industrial assessment of a gold deposit is the establishment of the distribution features of mineralization. Without this it is impossible to reliably determine the density of the exploration network and, consequently, confidently make the calculation of reserves ...
In carrying out prospecting and exploration work on gold deposits the issue of paramount importance is the identification of areas of ore bodies with high gold content - the so-called ore pillars. But in essence, the geological and economic efficiency of exploration and exploitation is determined to a large extent by knowledge of the regularities of ore pillars location and reliability of forecasting on this basis geological and industrial parameters of the ore body along the strike and dip ...
Studies conducted by the authors during 1973-1975 on gold deposits of the gold-silver formation, allow us to draw certain conclusions and offer specific recommendations on the complex and rational sequence of exploration work at various stages of exploration of deposits belonging to this structural and genetic group ...
Gold deposits, confined to mineralized zones of crushing and buckling of sandstone-shale strata, have specific features of structure. They differ from the widespread quartz-gold deposits of vein type not only by morphology of ore-bearing bodies, but also by the structure of ore fields confined to large discontinuous structures of deep embedment, long and complex history of mineralization development, significant scale of hydrothermally altered and mineralized rocks, predominant role of microscopic and sometimes dispersed gold in ores. If, speaking simplistically, for vein quartz-gold deposits, the problem of prospecting and subsequent exploration is reduced to finding veins and identifying areas (blocks) with balance ores in them according to the already repeatedly tested exploration network, the theoretical aspects of the methodology of exploration of gold deposits of the type of mineralized crushing zones and their practical solution still need to be developed. ...
Исследователи, изучающие закономерности размещения золотого оруденения в пределах рудных полей или отдельных рудных тел месторождений убого-сульфидной формации, зачастую сталкиваются с серьезными трудностями ...
Широкое развитие геологических исследований в вулканогенных областях способствовало обнаружению целого ряда месторождений и рудопроявлений металлов ( Au , Ag , Си, Mo , Pb , Zn , Sb , Hg , Bi , U и др.) и неметаллов (алуниты, корунд, сера). В свою очередь эти открытия привлекли внимание геологов к выяснению рудоносности вулканогенных образований вообще и к изучению особенностей формирования гидротермально измененных пород, с которыми ассоциируют рудопроявления, в частности ...
Главное рудное тело месторождения Осеннее приурочено к зоне дробления в гранодиоритах и представлено кварцевыми и кварц-полево- шпатовыми с турмалином молибденитсодержащими жилами, которые падают в западном направлении под углом 35° при меридиональном простирании. По падению тело вскрыто примерно на 60 м, причем с поверхности до 35 м штольней, штреками и рассечками, а в интервале 50—60 м подсечено шахтой. Данные опробования и изучения вещественного состава руд позволили выделить зону окисления глубиной до 40 м, где наиболее окисленные руды приурочены к поверхности с постепенным уменьшением окисных форм молибдена на глубину ...
