The Early Carboniferous Valerian andesitodiorite volcanic-plutonic complex is located in the Turgai Trough. It is composed of gabbro-granodiorite intrusive rocks, basalt-rhyolite volcanic rocks and dikes of different composition. The complex consists of several magmatic nodes represented by paleovolcanic structures. Comparison of the structure of paleovolcanic structures located at different levels of erosional section allows us to create a generalized model of the complex. The complex is genetically associated with skarn-magnetite and associated minerals.
To skarn-magnetite deposits belong those that differ markedly in the patterns of location, modes of formation, composition of ores and near-ore metasomatites and many other geologic features.
In recent years, several zones and points of copper mineralization have been established at the Kachar magnetite deposit (North Kazakhstan) and adjacent territory.
The Soviet Union is the world leader in iron ore reserves and production, leaving developed capitalist countries, including the United States, far behind. In our country explored or exploited more than three hundred iron ore deposits, different in genesis, material composition of ores, industrial importance ...
The scapolite subtype of contact-metasomatic iron ore deposits was identified by G.A.Sokolov. In the Turgai trough four deposits belong to this subtype: Kacharskoye, Yuzhno-Svetlo-Dzharkulskoye, Kuttukskoye and partially Davydovskoye ...
Skarn-magnetite deposits owe their appearance to magmatic processes. However, the forms and nature of manifestation of the connection of deposits with magmatism are diverse. The dominant hypothesis, developed by P.P.Pilipenko, A.N.Zavaritsky and their followers, about the formation of skarn-magnetite deposits in the contact zone of intrusive massifs with carbonate sediments ...
In the late forties and early fifties, through the efforts of geophysicists and geologists of the Urals and Kazakhstan in the Trans-Ural region, on the territory of the Turgai Trough, was discovered a new iron ore province of the Soviet Union, represented by a large group of contact-metasomatic deposits of magnetite ores and subsequently called the Main Iron Ore Belt of the Turgai Trough. ...
Complex magnetite ores are typical for contact-metasomatic iron ore deposits. In addition to iron, they contain sulfur, cobalt, copper, lead, vanadium, phosphorus and other valuable components. At present, sulfide concentrates are extracted from magnetite ores: cobalt-pyrite, copper, lead and zinc, in the future it is possible to extract apatite, calcite, and sometimes datolite. ...
The correlation coefficient as a measure of linear relationship between geological and industrial parameters (thickness of ore bodies, content of components in ores, etc.) is widely used in practice and has numerous applications. Meanwhile, the values of geological and industrial parameters are always measured with some error, which undoubtedly affects the value of the correlation coefficient and may even lead to an erroneous conclusion about the relationship between geological and industrial parameters. Let us consider the effect of sampling error on the value of the correlation coefficient between the grades of two components in the ore. ...
In the course of studies of the behavior of various elements in rocks, ores and minerals, there is a need for mathematical processing of a large number of analyses. The results of the study are used for prospecting for mineral deposits, for elucidating the formation of rocks or ores, for the purposes of sampling and calculating reserves, and for solving other questions ...
The main discrepancy in the views of the author and B. Ya. Yufa. The author considers basic and control analyses as unequal changes, B. Ya. Yufa believes that there should be no systematic errors in control analyses. The conclusion about the magnitude of systematic error is usually made on a limited batch of samples, and the magnitude of systematic error is essentially random, since it depends on the sample volume, sampling method, time of production of analyses, etc. In other words, while recognizing the absence of systematic error in control analyses (a controversial position, by the way), we must also recognize that the true magnitude of the systematic error of the main analyses compared to the control analyses cannot be determined ....
The article presents new data on intrusive rocks of the Sarbaiskoye deposit, obtained as a result of the works of the geological party of the Leningrad Mining Institute.Sarbaiskoye magnetite ore deposit is one of the largest among the deposits of the Kustanai iron ore province. I. A. Kochergin and G. A. Sokolov consider this deposit to be a contact-metasomatic deposit, confined to the contact of a multiphase intrusion of diorite-porphyrites with volcanogenic-sedimentary rocks of the Lower Carboniferous. Among the intrusive rocks I. A. Kochergin distinguishes: 1) pre-metallic: [a) diorite-porphyrites of the main intrusion; b) vein diorite-porphyrites; c) metadiorite-porphyrites]; 2) post-ore: [a) vein quartz diorite-porphyrites; b) syenite-porphyrites: [according to G. A. Sokolov, microgranite porphyries].
Контрольные химические анализы совершенно обязательны при разведочных работах. При существенных расхождениях между результатами основных и контрольных анализов основные должны быть исправлены или вновь проанализированы. Очень велика роль контрольных анализов в тех случаях, когда содержание приближается к пределу чувствительности анализа (для редких элементов и элементов-примесей). Расхождения между основными и контрольными анализами возникают за счет случайных и систематических погрешностей. При подсчете средних содержаний по большому числу проб влияние случайных погрешностей невелико, так как они имеют разные знаки и взаимоуничтожаются. Гораздо сильнее влияние систематических погрешностей, выявляемых внешним контролем.
