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Date submitted1980-12-08
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Date accepted1981-02-19
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Date published1981-07-23
Comparison of seismic data on the upper crust of Iceland and the Baltic Shield
- Authors:
- S. M. Zverev
- I. V. Litvinenko
Iceland and the Baltic Shield have significantly different geologic structures, although in both regions high-velocity rocks of consolidated crust come to the surface ...
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Date submitted1980-12-17
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Date accepted1981-02-04
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Date published1981-07-23
Crustal depth section of central Karelia and its seismic model
In 1976-1979, the production and geological association Sevzapgeologia and the Problem Research Laboratory of Geological and Geophysical Research of the Baltic Shield of the Leningrad Mining Institute performed depth seismic surveys (DSR) in Central Karelia along the profile of the city of Kem - Lake Tulos, which is a continuation of the international geotraverse I, passing from the Alps to the Baltic Shield through the territories of the FRG, Czechoslovakia, Poland and the USSR ...
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Date submitted1980-12-30
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Date accepted1981-02-24
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Date published1981-07-23
Kinematic peculiarities and exploration possibilities of exchange waves refracted on steeply dipping contacts
- Authors:
- T. B. Gavlovskaya
- M. D. Lizinsky
The most important iss. of seismic data interpretation is the determination of the type and kinematics of the recorded waves. The specificity of solving this problem for ore areas is that the wave fields are characterized by high complexity, determined by a large number of in-phase axes, crossing each other and characterized by a wide range of apparent velocity ...
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Date submitted1980-12-08
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Date accepted1981-02-17
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Date published1981-07-23
Methods of seismic mapping of the Pechenga nickel-bearing massifs
- Authors:
- Yu. G. Shopin
The experience of applying seismic studies in the Pechenga ore district has allowed in recent years to proceed to the solution of geological problems directly related to the search for copper-nickel deposits ...
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Date submitted1980-12-08
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Date accepted1981-02-11
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Date published1981-07-23
Seismic study of discontinuities in the Pechenga ore field
The Pechenga ore field, within the limits of which known commercial deposits are concentrated, remains one of the main objects of copper-nickel sulfide ore prospecting ...
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Date submitted1980-12-16
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Date accepted1981-02-05
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Date published1981-07-23
Use of boundary velocity for mapping the Pechenga ore field
- Authors:
- T. L. Pisakina
During processing of the first arrivals recorded during the study of the Pechenga ore field by the reflected wave method (MOB), the possibility of using elastic wave velocity for geological mapping of the ore field was investigated, since the data of other methods (magnetic survey, electrical survey, drilling) are not always sufficient for a reliable solution of this problem ...
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Date submitted1980-12-28
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Date accepted1981-02-23
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Date published1981-07-23
To the methodology of building seismic models of sections of the Pechenga area
- Authors:
- N. E. Grin
- E. R. Litvinenko
One of the most important tasks of interpretation of seismic data, as is known, is to determine the geologic and physical nature of seismic boundaries ...
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Date submitted1980-12-29
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Date accepted1981-02-06
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Date published1981-07-23
Frequency spectra of seismic oscillations excited by industrial explosions
- Authors:
- N. I. Suvorova
On the territory of the Karelian-Kola region, mass explosions in quarries and mines are successfully used as sources of elastic vibrations for seismic studies of the deep structure of the Earth's crust ...
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Date submitted1980-12-30
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Date accepted1981-02-22
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Date published1981-07-23
Detection of the connection of wave fields with the fine structure of seismic boundaries in magmatic rocks
- Authors:
- O. V. Miroshnikova
- T. Debretsion
Based on detailed studies of elastic parameters of well cores in the Kafan ore field it is shown that the velocity section of magmatic rocks is represented mainly by layers of small thickness (up to 100 m), among which thin layers with a thickness of 10-20 m predominate ...
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Date submitted1980-12-04
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Date accepted1981-02-01
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Date published1981-07-23
Possibilities of increasing the depth of seismic exploration in the oil and gas regions of the Syrian Arab Republic on the basis of studies using the effective seismic model method.
- Authors:
- R. Nasser
- R. K. Kurbanov
- A. L. Livantsova
Numerous modern methods of seismic exploration were tested in oil and gas prospective regions of Syria, modern recording equipment was used and advanced methods of processing the results of observations were applied ...
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Date submitted1980-12-20
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Date accepted1981-02-01
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Date published1981-07-23
Frequency analysis of reflected waves in Northern Afghanistan
- Authors:
- A. M. Nabat
- L. F. Rezaikina
- O. V. Miroshnikova
The need to investigate deep horizons, which are associated with the prospects of discovering oil and gas fields in Northern Afghanistan, requires the use of effective methods of interpretation of complex wave fields ...
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Date submitted1980-12-28
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Date accepted1981-02-28
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Date published1981-07-23
Investigation of echo-signal characteristics for structural and lithological mapping of bottom sediments
- Authors:
- A. I. Svechnikov
Separation of bottom sediments into separate lithological types by means of seismoacoustic methods of research belongs to the class of problems of recognition of distant objects in water and consists in determination of geometric and physical and mechanical characteristics of bottom sediments on the basis of identification and measurement of determining changes arising in the echo-signal as a result of interaction of the probing acoustic impulse with the studied sediments ...
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Date submitted1980-12-18
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Date accepted1981-02-17
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Date published1981-07-23
Analytical methods of determining the coordinates of the center and direction of the ball magnetization from the Z anomaly
- Authors:
- V. V. Glazunov
- V. P. Zakharov
To solve the formulated problem, the magnetic field is usually used along a single profile passing over the center of the ball and through the extrema of the anomaly Z ...
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Date submitted1980-12-05
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Date accepted1981-02-02
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Date published1981-07-23
Analytical method of interpreting magnetic anomalies of a horizontal plate at inclined magnetization
- Authors:
- V. P. Zakharov
Anomalies characteristic of the horizontal plate are most often observed in platform regions. Their sources are usually relatively low thicknesses of terrigenous (sometimes volcanogenic) rocks, the distribution of which in the plan is limited by discontinuities or zones of sharp facies transitions ...
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Date submitted1980-12-30
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Date accepted1981-02-16
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Date published1981-07-23
Computer interpretation of DT anomalies of some linear anticlinal structures
- Authors:
- Yu. P. Goryachev
The equivalence of the external magnetic field of a simple two-dimensional anticlinal fold and a dip-less low-power reservoir shown in the works opens the possibility of applying the interpretation methods developed for the latter simple model, and in the interpretation of magnetic anomalies of more complex fold structures ...
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Date submitted1980-12-15
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Date accepted1981-02-16
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Date published1981-07-23
Attraction field of a two-dimensional polygonal prism of variable density
- Authors:
- G. G. Kravtsov
The need to calculate the anomalous effect of irregularly shaped bodies in the process of interpretation of gravity anomalies by the selection method arises constantly. If the study is subject to strongly elongated along the strike geological structures, then usually use a flat model of interpretation, which greatly reduces the labor intensity of calculations ...
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Date submitted1980-12-15
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Date accepted1981-02-03
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Date published1981-07-23
Results of works by methods of magnetotelluric profiling (MTP) and telluric currents (MTT) in the North-Western part of the Kola Peninsula
- Authors:
- N. D. Vasin
- G. P. Novitsky
- E. A. Suvorov
Works by methods of telluric currents and magnetotelluric profiling were carried out in the northwestern part of the Kola Peninsula in order to study the deep geoelectric structure of the Pechenga-Allarechensk ore district ...
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Date submitted1980-12-30
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Date accepted1981-02-24
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Date published1981-07-23
Method of calculation of REE palettes in the area of vertical contact
- Authors:
- G. A. Cheremensky
The question of taking into account lateral influences in electrical exploration by direct current methods arose during the first works under hydraulic structures and solving the problems of ore geology ...
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Date submitted1980-12-15
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Date accepted1981-02-21
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Date published1981-07-23
Experimental geoelectrochemical studies in the water area of the eastern part of the Gulf of Finland
- Authors:
- O. F. Putikov
- Ya. B. Sokolin
- M. S. Bugorkov
Hydrological studies have established that two types of water are present in the eastern part of the Gulf of Finland: fresh waters carried by the Neva River, possibly contaminated by industrial and domestic waste, and more saline and cleaner waters coming from the western part of the Gulf of Finland ...
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Date submitted1980-12-13
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Date accepted1981-02-01
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Date published1981-07-23
Apparatus of polarographic logging for studying groundwater composition
- Authors:
- N. N. Uvarov
The possibility of using polarographic analysis to study the chemical composition of groundwater has already been proven. At the Leningrad Mining Institute, polarographic logging equipment has been developed and tested ...
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Date submitted1980-12-19
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Date accepted1981-02-03
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Date published1981-07-23
Measurement of borehole wall deformation in studying the dynamics of large ice massifs
- Authors:
- D. N. Dmitriev
- V. G. Terentyev
When evaluating the rheological properties of ice in large ice massifs, the main experimental data are data on the change in time of the diameter of drilled wells
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Date submitted1980-12-28
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Date accepted1981-02-11
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Date published1981-07-23
Peculiarities of geology of Eastern Cuba according to geophysical data
- Authors:
- J. Rodriguez
Geological research in Cuba has been carried out for more than a century, but only after the victory of the revolution in 1959 opened the way to a consistent and systematic study of the country's subsoil ...