SPECTRAL ANALYSIS OF NON-TIDAL VARIATIONS OF THE GRAVITATIONAL AND ELECTROMAGNETIC FIELDS

(Antonov Yu.V. Rybin A.K. Matiukov V.E. )

The results are indicated of spectral analysis of non-tidal variations of gravity and magnetotelluric field monitoring observations in Bishkek (Kyrgyzstan) for 2015 and 2017 years is presented. The main periods of oscillations in the range 0-10000 min are coincided. With periods of oscillations of the Earth and Sun match the oscillations in the magnetotelluric field. The main periods of oscillations of the gravitational and magnetotelluric fields are daily oscillations and to a lesser extent semi-diurnal.......

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  • 2019  № 4, pp. 63-69

OPERATIVE SOFTWARE FOR THE THREE-DIMENSIONAL APPROACH IN TRANSIENT ELECTROMAGNETIC METHOD (TEM)

(Zlobinskiy A.V. Mogilatov V.S. )

The authors supplement the previous publication devoted to the one-dimensional universal modern mathematical support of the transient method (TEM). The one-dimensional approach still remains the main technique for interpreting the TEM data. But, of course, the need of multidimensional approach is long overdue. This problem is not simple. The forward three-dimensional problem in TEM is still difficult to access for professionals in electrical prospecting. A bigger problem is the lack of universally accepted approach to solving three-dimensional inverse problem. This article develops the approach, which consists of direct inversion (without an explicit solution of the forward problem) large amounts of data on the basis the approximate linearized representation of the forward problem. Not to say that this approach is new. The authors themselves suggested it a long time ago. This publication presents some new results in this direction. So, for example, implemented operational forward three-dimensional problem in the consisting of the famous system Podbor, and also created a software package for three-dimensional tomographic inversion of the data of areal works by TEM. Linearized tomographic approach promises the creation of extremely operational, public and easily replicable mathematical apparatus of three-dimensional inversion that will help to make 3D electrical exploration the controlled standard production method.......

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  • 2019  № 4, pp. 70-78

SIN-SEDIMENTARY IRREGULARITIES OF THE SEDIMENTARY COVER IN THE SOUTH MOSTKARA SEA OFFSHORE (ON THE BASIS OF RECENT MULTIDISCIPLINARY REGIONAL SEISMIC, GRAVITY AND MAGNETIC SURVEYS)

(Gololobov Ju.N. Druzhinina E.A. Suprunenko O.I. )

Seismic profiling gravity and magnetic surveys 1:500 000 scale within near shore South Kara Sea shelf provided to identify new features of the zoning the basement and the taphrogenic sequence. Those features are the stepwise structure, the geometry of litho tectonic units, hierarchy and genesis of structures. The efficiency of innovational method of the processing of the data of gravity and magnetic surveys (the anomalies classification) in the oil and gas exploration is demonstrated.......

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  • 2019  № 3, pp. 2-9

CHARACTERISTICS OF THE SEISMICITY OF THE CENTRAL AND EASTERN PARTS OF THE PERSIAN GULF

(Abramov V.Yu. Hiba Aljabasini Dubyansky A.I. )

The article presents some of the main characteristics of the seismicity regime of the central and eastern parts of the Persian Gulf and its coast. Data on the number and spatial position of seismic events, their energy characteristics (magnitudes) and the depth of the source zones were analyzed. The distribution of the number of seismic events over time reveals a quasi-periodic structure with a half-period of about 5-6 years. It should be noted that with an increase or a significant decrease in the number of earthquakes, the spatial position of the zones of their epicenters remains unchanged. The position of the hypocenters of the earthquakes under consideration covers a wide range of depths from shallow (2-10 km) to deeper (20-30 km). There is a clear General trend towards a decrease in the average depth level of focal zones during the period under review, against which time intervals are distinguished with a relatively large average for the year and a relatively small level of immersion of hypocenters. The analysis of temporal variations of seismicity of the North-Eastern part of the Persian Gulf basin showed high activity of seismic processes.......

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  • 2019  № 3, pp. 10-14

MINERALS OF THE NATURAL REMANENT MAGNETIZATION OF KIMBERLITES OF THE PIPE NYURBINSKAYA (YAKUT DIAMONDIFEROUS PROVINCE)

(Konstantinov K.M. Khoroshikh M.S. Starkova T.S. Liskovaya L.V. Kuzina D.M. )

In kimberlites pipe Nyurbinskaya two components of vectors of a characteristic natural remanent magnetization which are created by different magmatic processes are installed. The first - high-temperature M (magnetite), was formed at the moment by a becoming of a kimberlite pipe. The second - medium-temperature P (pirrotine), most likely, was created due to the hydrothermal processes caused by introduction of a post-ore dayka of alkaline dolerites. It is experimentally proved that pyrite served as initial mineral of neogenic pirrotine idiogenous to kimberlites. It is shown that the received petrophysical, magneto-mineralogical, thermomagnetic and geochemical data allow in a complex with the geological facts to create a correct image of physik-geological model of diamond fields in the Yakut diamondiferous province that will have a positive impact on their search.......

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  • 2019  № 3, pp. 15-26
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