Structurally and tectonically, the Vorkutsk coal deposit is a large brachysynclinal fold (mulda), the long axis of which has a north-north-east strike ...
Inductive electrical exploration is widely used in ore areas of the Karelian-Kola region. It is characterized by a significant number of modifications and types of equipment, with the help of which are measured values that determine the intensity H of the alternating magnetic field.
In geologic mapping of ore districts on a large scale (1:50,000, 1:25,000 and larger), detailed gravity survey is widely used, which makes it possible to reveal many features of the geologic structure of bedrock overlain by loose sediments.
1.In estimating confidence limits for the mean metal concentration in ore, data on the moments of distribution and the number of samples are taken into account. It is also important to have an idea of the degree of independence of differences between determinations, since the usual statement that the variance of the mean is n times less than the variance of a single determination is valid only for determinations with independent variations (n is the number of single determinations).
Assessment of the degree of similarity or difference of geological structures has always been of interest to researchers, as it has practical consequences: questions of genesis of structures and forecasts of distribution of mineral deposits are largely solved taking into account possible analogies. The complexity of this assessment is aggravated by the fact that the objects of nature, unlike the products of human technological activity, in some features are necessarily inimitable. Even in the simplest cases, one can expect in advance some difference in nearby structures having the same origin. A significant difficulty is the selection of those indicators (attributes) by which the degree of closeness of the compared geological structures is assessed. Emphasized interest in certain aspects (genesis, ore-bearing, metamorphism, etc.) may manifest itself in the fact that some features in comparison with others will subjectively receive greater importance, while some will be completely left out of the analysis.
At joint application of several geophysical methods of researches the approach is widely used, at which on the basis of the data of separate methods special corrections are calculated, introduced in readings of other methods. This significantly increases the detail and certainty of the general conclusion about the identified features of the geological structure...
The study of the deep structure of tectonically complex areas and the search for deeply buried mineral deposits are tasks for which the researcher has to involve a wide range of geological, geophysical, geochemical and other features. As a rule, the more remote from the day surface of the studied geological objects, the greater the number of interacting, overlapping geological androcesses have taken part in the history of the area, the less definite and reliable are the signs of these objects, more vague - the boundaries of their manifestation ....
When studying the geology of some area often use a variety of methods. Each of them from the point of view of a particular task brings not only information of interest to the researcher at the moment, but also information of much less interest, or not essential at this stage of research ...
In defense planning, production and scientific research in recent years, a new scientific discipline - game theory - has become widely used. Its main feature is that it makes it possible to best determine the necessary actions - to choose the most successful line of behavior (strategy). The solution is under the condition that the final outcome is not fully determined by any of the parties involved in the conflict situation, and the actions themselves are taken on the basis of incomplete information ...
The regular relationship between tectonic movements and magmatism of the Earth is a definite correlation between different forms of matter movement, established by numerous facts. The elucidation of this important geologic regularity modern science owes much to Yu. A. Bilibin, V. A. Nikolaev, P. M. Tatarinov, V. I. Serpukhov, A. V. Peyve, V. M. Sinitsin, G. Reed, X. Hess, W. Benson and other researchers.
One of the tasks often solved using aeromagnetic survey data is to determine the depth of occurrence of magnetized rocks. The experience of using AT anomalies in different geological regions shows that the results of calculations become quite reliable only after statistical generalization. In the simplest case, the values of the depth of occurrence of disturbing masses are averaged over some area, for example, within a single anomalous zone, or over part of the route.
Геологическое исследование закрытых областей — главнейшая задача разведочной геофизики. Наилучшим образом она может быть решена только при сочетании различных по своим основам методов исследования. В то же время в конкретных геологических условиях требуется тщательная оценка геологической и экономической эффективности каждого из них. Уточнение наших .представлений о возможных в данном районе структурно-геологических формах и совершенствование геологической интерпретации наблюдаемых физических полей зачастую приводят к тому, что результативность того или ицого метода со временем меняется и ранее уже использованные материалы полевых съемок вновь дают в руки исследователя ценные сведения.
