Deep geoelectrical studies in the Finnmark and the Pechenga area by means of the ‘Khibiny’ source

Жамалетдинов, А. А.; Tokarev, A.; Vinogradov, Yu. A.; Асминг, В. Э.; Otchkur, N.A.; Rønning, Jan Steinar; Lile, Ole Bernt

doi:10.1016/0031-9201(93)90136-w

Cited by 7 publications

(5 citation statements)

References 2 publications

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“…General compilations including models and/or discussion on the implications of the conductivity structure: Hjelt, 1984Hjelt, , 1987Hjelt, , 1991Hjelt, , 1992Hjelt et al, 1986;Hjelt and Korja, 1993;Jones, 1982aJones, , b, 1983Korja, 1990Korja, , 1993Korja, , 1997Hjelt, 1993, 1998;Kovtun, 1976;Rasmussen, 1987;Rokityansky, 1983;Zhamaletdinov, 1990Zhamaletdinov, , 1992Zhamaletdinov, , 1996 Russia: Golod and Klabukov (1989) EM in the southeastern part of the Fennoscandian Shield Golod et al (1983a, 1983b) Heikka et al (1984 MHD in Kola Peninsula Kovtun (1989) AMT-MT the eastern part of the Fennoscandian Shield Kovtun et al (1988Kovtun et al ( , 1989Kovtun et al ( , 1992Kovtun et al ( , 1994Kovtun et al ( , 1998 Krasnobayeva et al (1981) MT in Kola Peninsula Lubavin et al (1999) AEM in the Kola Peninsula Rokityansky et al (1979Rokityansky et al ( , 1981 MV in the southeastern part of the Fennoscandian Shield Vanyan et al (1989) MHD in Kola Peninsula Velikhov et al (1987) MHD in Kola Peninsula Zhamaletdinov et al (1993) EM in Kola Peninsula Zhamaletdinov (1996) EM in Kola Peninsula and Karelia Zhamaletdinov and Semenov (1984) EM in Karelia and Kola Peninsula Estonia: Kovtun (1976Kovtun ( , 198...…”

Section: Bedrock Layers In Fennoscandiamentioning

confidence: 99%

“…Kaikkonen and Pajunpää, 1984;Rekola and Ahokas, 1987), and controlled source experiments (e.g. Velikhov et al, 1987;Zhamaletdinov et al, 1993;Kaikkonen et al, 1996). The results of these studies have been incorporated in comprehensive shield-wide conductivity models by several authors in order to derive tectono-geological implications from sub-surface conductivity variations (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Crustal conductivity in Fennoscandia—a compilation of a database on crustal conductance in the Fennoscandian Shield

et al. 2014

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A priori knowledge on large-scale sub-surface conductivity structure is required in many applications investigating electrical properties of the lithosphere. A map on crustal conductivity for the Fennoscandian Shield and its surrounding oceans, sea basins and continental areas is presented. The map is based on a new database on crustal conductance, i.e. depth integrated conductivity, where all available information on the conductivity of the bedrock, sedimentary cover and seawater are compiled together for the first time for the Fennoscandian Shield. The final model consists of eight separate layers to allow a 3D description of conductivity structures. The first three layers, viz. water, sediments and the first bedrock layer, describe the combined conductance of the uppermost 10 km. The other five bedrock layers contain the data of the crustal conductance from the depth of 10 km to the depth of 60 km. The database covers an area from 0• E to 50• E and 50• N to 85• N. Water conductances are estimated from bathymetric data by converting depths to conductances and taking into account the salinity variations in the Baltic Sea. Conductance of the sedimentary cover includes estimates on the conductance of both marine and continental sediments. Bedrock conductances are extrapolated from 1D-and 2D-models. Extrapolations are based on data from magnetometer array studies, airborne electromagnetic surveys and other electromagnetic investigations as well as on other geophysical and geological data. The crustal conductivity structure appears to be very heterogeneous. Upper crust, in particular, has a very complex structure reflecting a complex geological history. Lower crust seems to be slightly more homogeneous although large regional contrasts are found in both the Archaean and Palaeoproterozoic areas.

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Section: Bedrock Layers In Fennoscandiamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Crustal conductivity in Fennoscandia—a compilation of a database on crustal conductance in the Fennoscandian Shield

et al. 2014

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“…The special "Magnet-2" program has been elaborated for this purpose by V.E. Asming [10]. This program allows detecting the magnetic field by summing a certain set of endlessly long horizontal current lines (DC) in a free half-space, ignoring any impact of extrinsic currents.…”

Section: Results Of Field Experimentsmentioning

confidence: 99%

“…The novelty of the work, in comparison with previous publications [10,11], is based on a more complete description of technique of the work using not only "cold", but also "hot" launches of the MHD installation "Khibiny". The description is made for the entire territory of the Kola Peninsula.…”

Section: Discussionmentioning

confidence: 99%

“…Measurements were implemented as in the mode of single pulses generated by the 80 MW magneto-hydrodynamic (MHD) generator "Khibiny" in the accumulation mode of rectangular current pulses of 0.125 Hz frequency generated by 29 kW car generator. In addition to previous publications of technical character [10,11], the emphasis here is on geological description.…”

Section: Introductionmentioning

confidence: 99%

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Study of the Cu-Ni Productive Suite of the Pechenga Structure on the Russian-Norway Border Zone with the Use of MHD Installation “Khibiny”

Жамалетдинов

2019

Minerals

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The tracing of current-conducting channels of the Pechenga structure from Russian to Norwegian territory was the main task of this research. The study was carried out in the framework of the Soviet-Norwegian cooperation “Northern Region” to estimate the prospects for discovery of Cu-Ni deposits in northern Norway. In addition to previous publications of technical character, the emphasis here is on geological description. Experimental measurements have been performed in the field of the “Khibiny” dipole and with the use of DC electrical profiling. The “Khibiny” dipole consists of 160-ton aluminum cable flooded in the Barents Sea bays on opposite sides of the Sredny and Rybachy peninsulas. Measurements were implemented as in the mode of single pulses generated by 80 MW magneto-hydrodynamic (MHD) generator “Khibiny” (“hot” launches) and in the accumulation mode of rectangular current pulses of 0.125 Hz frequency generated by a 29 kW car generator (“cold” launches). From results of measurements, it was concluded that the most promising potential for Cu-Ni deposits Pil’gujarvi formation of the Northern wing of the Pechenga structure is rather quickly wedged out in Norway, while the conductive horizons of the Southern part of Pechenga, which have a weak prospect for Cu-Ni ores, follow into Norway nearly without a loss of power and integral electrical conductivity.

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The Fennoscandian Shield: A treasure box for deep electromagnetic studies

Korja

Hjelt

Deep Electromagnetic Exploration

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Deep geoelectrical studies in the Finnmark and the Pechenga area by means of the ‘Khibiny’ source

Cited by 7 publications

References 2 publications

Crustal conductivity in Fennoscandia—a compilation of a database on crustal conductance in the Fennoscandian Shield

Crustal conductivity in Fennoscandia—a compilation of a database on crustal conductance in the Fennoscandian Shield

Study of the Cu-Ni Productive Suite of the Pechenga Structure on the Russian-Norway Border Zone with the Use of MHD Installation “Khibiny”

The Fennoscandian Shield: A treasure box for deep electromagnetic studies

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