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A. A. Zhamaletdinov A. N. Shevtsov T. G. Korotkova Yu. A. Kopytenko V. S. Ismagilov M. S. Petrishev B. V. Efimov M. B. Barannik V. V. Kolobov P. I. Prokopchuk M. Yu. Smirnov S. A. Vagin M. I. Pertel E. D. Tereshchenko A. N. Vasil’ev V. F. Grigoryev M. B. Gokhberg V. I. Trofimchik Yu. M. Yampolsky A. V. Koloskov A. V. Fedorov T. Korja 《Izvestiya Physics of the Solid Earth》2011,47(1):2-22
The paper addresses the technique and the first results of a unique experiment on the deep tensor frequency electromagnetic sounding, the Fennoscandian Electrical conductivity from results of sounding with Natural and Controlled Sources (FENICS). In the experiment, Energy-1 and Energy-2 generators with power of up to 200 kW and two mutually orthogonal industrial 109- and 120-km-long power transmission lines were used. The sounding frequency range was 0.1–200 Hz. The signals were measured in the Kola-Karelian region, in Finland, on Svalbard, and in Ukraine at distances up to 2150 km from the source. The parameters of electric conductivity in the lithosphere are studied down to depths on the order of 50–70 km. A strong lateral homogeneity (the one-dimensionality) of a geoelectric section of the Earth’s crust is revealed below depths of 10–15 km. At the same time, a region with reduced transverse crustal resistivity spread over about 80 000 square kilometers is identified within the depth interval from 20 to 40 km. On the southeast the contour of the anomaly borders the zone of deepening of the Moho boundary down to 60 km in Central Finland. The results are compared with the AMT-MT sounding data and a geodynamic interpretation of the obtained information is carried out. 相似文献
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We analyze the magnetic tensor and tipper data in the interval of periods from a few minutes to a few hours for the geomagnetic
time series of 2007–2008. The frequency responses, the polar diagrams, and the real and imaginary induction arrows which reflect
the effects of geoelectric heterogeneities are calculated. The monitoring of the tipper and tensor data series revealed the
annual variations in these parameters, which are caused by the changes in the electric conductivity of the lithosphere. The
anomalous variations identified in the behavior of the magnetic tipper and tensor are probably due to earthquakes with M ≥ 6.3. 相似文献
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A. A. Sorokin Yu. V. Smirnov Yu. N. Smirnova N. M. Kudryashov 《Doklady Earth Sciences》2011,439(1):944-948
The U-Pb geochronological studies showed that metarhyolites from the Turan Group of the Bureya (Turan) Terrane to the east
of the Central Asian Foldbelt are Middle Cambrian (504 ± 8 Ma), not Neoproterozoic in age, as was suggested before. Metarhyolites
are younger than the Early Cambrian terrigenous-carbonate sediments from this terrane characterized by the Atdabanian archaeochyatid.
Considering that volcanic rocks have features of intraplate origin, it may be assumed that their formation corresponds to
the breakup of the Early Paleozoic passive continental margin. 相似文献
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V. I. Slysh M. V. Popov B. Z. Kanevskii A. I. Smirnov A. V. Kovalenko Yu. P. Ilyasov V. V. Oreshko B. A. Poperechenko H. Hirabayashi K. M. Shibata E. B. Fomalont 《Astronomy Letters》2001,27(5):277-283
The 64-m radio telescope equipped with an S-2 recording system in the town of Kalyazin was involved in an international fine-structure survey of quasars and active galactic nuclei carried out with a ground-based—space radio interferometer. The HALCA Japanese satellite in an orbit with an altitude of up to 24 000 km with an 8-m antenna was used as a space element of the interferometer. A radio image of the inner region of the CSS-type quasar 3C 147 was obtained with an angular resolution of ~0.3 mas at 6 cm. The image exhibits a core and several jet components mostly arranged in the main jet direction, but one of the components moves across the jet. No evidence was found for the superluminal separation of jet components. The estimated brightness temperature,~1011 K, is consistent with the theoretical limit imposed by synchro-Compton radiation. 相似文献
90.
Shikhova N. M. Patonin A. V. Ponomarev A. V. Smirnov V. B. 《Izvestiya Physics of the Solid Earth》2022,58(4):591-602
Izvestiya, Physics of the Solid Earth - Abstract—Experiments on sandstone, basalt and granite were carried out on a controlled hydraulic press under triaxial loading conditions at confining... 相似文献