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Date submitted1986-10-23
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Date accepted1986-12-03
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Date published1987-11-03
Seismic studies of carbonatite massifs in the Baltic Shield
- Authors:
- I. V. Litvinenko
- V. S. Muzylev
The study of the geological structure of carbonatite massifs is a rather difficult task due to their very complex structure.
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Date submitted1986-10-26
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Date accepted1986-12-27
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Date published1987-11-03
Seismic modeling of crustal sections of the Baltic Shield
- Authors:
- K. A. Kalnin
- L. N. Platonenkova
Deep seismic studies (GC3) in the eastern part of the Baltic Shield were carried out by joint efforts of several organizations (PGO "Sevzapgeologia", LMI, etc.) under the scientific guidance of Professor I.V.Litvinenko.
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Date submitted1986-10-02
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Date accepted1986-12-07
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Date published1987-11-03
Comparative analysis of main wave hodographs from the DSS profiles in the southeastern part of the Baltic Shield
- Authors:
- N. I. Suvorova
In the territory of the south-eastern part of the Baltic Shield, observations by the DSS method have been carried out so far along the profiles crossing the main structures of this region: Baltia, Sveka, Lahdenpokhya - Lake Segozero, Pitkäranta - Sapasero, Pitkäranta - Sapasero. Pitkäranta - Spasskaya Bay.
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Date submitted1986-10-19
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Date accepted1986-12-11
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Date published1987-11-03
Investigation of the physical and geological nature of seismic waves reflected from the boundaries of the Pechenga effusive-sedimentary complex
The nature of waves associated with seismic boundaries is investigated in both oil and ore seismic.
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Date submitted1986-10-29
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Date accepted1986-12-04
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Date published1987-11-03
Possible nature of seismic waves from the Mohorovicich surface in the Baltic Shield
- Authors:
- A. G. Goncharov
To date, extensive data on the seismic properties of the crust-upper mantle boundary have been accumulated in many regions, indicating that ideas about the Mohorovicich (M) surface have changed significantly since the time of its discoverer.
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Date submitted1986-10-29
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Date accepted1986-12-18
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Date published1987-11-03
Efficiency of acoustic logging in dissecting the section of the Pechenga ore field
The paper summarizes the experimental data on the study of kinematic and dynamic characteristics of elastic waves for 17 wells with a total volume of more than 20000 m, located in different parts of the Pechenga ore field and sufficiently characterizing its section.
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Date submitted1986-10-25
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Date accepted1986-12-18
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Date published1987-11-03
Remote classification of the first layer of bottom sediments by acoustic method
- Authors:
- A. I. Svechnikov
Let us consider the system of sign characteristics of the wave field as applied to the prediction of lithologic composition of bottom sediments by the acoustic method, based on the mechanism of interaction of elastic waves at the interface and the features of their propagation in the sediment.
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Date submitted1986-10-08
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Date accepted1986-12-03
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Date published1987-11-03
Study of block structure of ore districts by seismic exploration
The solution of geological problems in ore districts by seismic methods is reduced to the identification of inhomogeneities of the velocity section, with which certain geological objects are associated.
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Date submitted1986-10-24
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Date accepted1986-12-24
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Date published1987-11-03
Geoelectric characterization of the section of southwestern Karelia
- Authors:
- N. D. Vasin
As a result of magnetotelluric (MT) studies, previously performed by LMI in the eastern part of the Baltic Shield was established a predominant connection of MT-field anomalies with deep fault zones and Proterozoic structures, in the structure of which take part graphitized shale.
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Date submitted1986-10-06
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Date accepted1986-12-17
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Date published1987-11-03
Results of works by the DEEP method at large-scale geological mapping at the stage of operational exploration of polymetallic ore deposits of Central Kazakhstan
- Authors:
- S. K. Zaburdin
- V. Kh. Zakharov
For a number of years LMI in cooperation with South Kazakhstan TOMGP conducts large-scale studies by dipole inductive profiling (DIP) on polymetallic deposits of Central Kazakhstan.
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Date submitted1986-10-19
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Date accepted1986-12-14
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Date published1987-11-03
Interpretation of soundings in inhomogeneous media
The concept of probing is used in electrical exploration, as a rule, as applied to the study of horizontal-layered medium: vertical electric probing on a constant tol, probing by field formation, frequency probing.
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Date submitted1986-10-15
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Date accepted1986-12-20
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Date published1987-11-03
Depth structure and chromite-bearing prospects of the Camagüey massif
- Authors:
- G. N. Shabalinsky
- Febles Damian
The Camagüey massif occupies an area of about 1000 km2, its length reaches 105 km, and its maximum width is 25-30 km.
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Date submitted1986-10-17
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Date accepted1986-12-25
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Date published1987-11-03
Determination of the depth of occurrence of low thickness reservoir bodies from ΔT anomalies transformed by the Saxov-Nigard method
- Authors:
- V. P. Zakharov
In the processing of high-precision aeromagnetic survey materials, conducted to study the sedimentary cover of platforms and identify structural complications in it, widely used various transformations, anomalous field, designed to weaken the anomalies that are caused by the basement rocks.
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Date submitted1986-10-11
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Date accepted1986-12-03
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Date published1987-11-03
Method of operative estimation of expected amplitudes of ΔT anomalies of some anticlinal structures
- Authors:
- Yu. P. Goryachev
Almost half a century ago, A.D. Arkhangelsky drew attention to the fact that the most common and commonly observed type of magnetic anomalies associated with the internal structure of the basement are band anomalies.
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Date submitted1986-10-01
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Date accepted1986-12-03
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Date published1987-11-03
Analogies in the analytical description of the attraction field of a rectilinear material segment, a polygonal material plate and volume masses of a polyhedron
- Authors:
- G. G. Kravtsov
Polyhedron as a universal geometric body is now widely used in exploration geophysics in modeling by gravity and magnetic anomalies of complexly arranged geological environment.
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Date submitted1986-10-02
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Date accepted1986-12-04
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Date published1987-11-03
Modeling and interpretation of potential fields of some two-dimensional interfaces described by irrational functions
- Authors:
- S. V. Zakharov
In calculations of gravitational and sometimes magnetic fields of structural complications of the platform cover and interpretation of the corresponding anomalies, the concept of two-dimensional contact surfaces - interfaces between media with different physical properties - is widely used.
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Date submitted1986-10-07
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Date accepted1986-12-11
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Date published1987-11-03
Interpretation of polarization geoelectrochemical data in the case of several electrochemical reactions
- Authors:
- O. F. Putikov
The limiting current of the electrochemical reaction is the main parameter of the polarization curve used in the quantitative interpretation of data from contact and non-contact methods of polarization curves (CMPC and NCPC).
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Date submitted1986-10-27
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Date accepted1986-12-12
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Date published1987-11-03
Peculiarities of electrochemical reactions propagation on the surface of polarizable bodies during their study by the contactless method of polarization curves
- Authors:
- A. A. Bessonov
- Yu. S. Ryss
Non-contact polarization curve (NCPC) studies are characterized by the excitation of cathodic electrochemical reactions on the surface of ore bodies in the zone of current entry into the mineralization and anodic reactions in the zone of exit.
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Date submitted1986-10-23
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Date accepted1986-12-28
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Date published1987-11-03
Experience of application of the contact method of polarization curves at iron ore deposits of Eastern Siberia
Among the geophysical methods used to detect and approximate the extent of iron ore targets, magnetic prospecting is widely used.
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Date submitted1986-10-05
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Date accepted1986-12-11
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Date published1987-11-03
On the possibility of generalization of the method of electrostatic images to problems on fields in regions containing a boundary of arbitrary configuration
- Authors:
- K. V. Titov
Widely spread in the tasks of exploration geophysics, in particular - electrical exploration, the method of electrostatic images, as it is known, is applicable to the problems where the inhomogeneities of the medium are limited by planes or cylinders (or straight lines and circles in the two-dimensional case).