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51.
Short-term (three months) bottom seismic observations in the area of the Yalam-Samur structure in the Middle Caspian Basin revealed a deep-seated compact zone of mantle-earthquake sources that dips beneath the southeastern Caucasus. To a first approximation, this zone may be interpreted as a seismofocal layer that characterizes thrusting of the Turan Plate under the southeastern Caucasus. However, the obtained spatial distribution of sources of microearthquakes and weak earthquakes is insufficiently reliable owing to the low aperture of the observation network of bottom seismographs. More reliable data on the position and parameters of the seismofocal layer could be obtained by the observation network with a wider spread of bottom seismographs (up to 50–100 km). If this result is confirmed, the current concept of interaction between the Alpine structures of the southeastern Caucasus, Turan, and South Caspian plates should probably be revised. The geotectonics of the Caucasus is preliminarily analyzed in the light of the newly revealed relationships. 相似文献
52.
This paper considers gas outflow from the agglomerate composed of gas-saturated ice, free gas, and gas hydrates. The agglomerate is considered to be a multicomponent continuous medium. 相似文献
53.
54.
Numerical Modeling of Sediment Mass Sliding and Tsunami Generation: The Case of February 7, 1963, in Corinth Gulf, Greece 总被引:1,自引:0,他引:1
G. A. Papadopoulos L. I. Lobkovsky R. Kh. Mazova I. A. Garagash V. Karastathis L. Yu. Kataeva V. G. Kaz'min 《Marine Geodesy》2007,30(4):315-331
Numerical modeling of a landslide process at the continental slope by taking into account slope parameters is performed for the tsunami event of February 7, 1963, reported in the Corinth Gulf, central Greece. A layered sediment structure was considered, and an initial external dynamic action at the landslide process was introduced. The results obtained were quite consistent with the observational runup data as well as with the results arrived at by conventional rigid-body and viscous-fluid models. However, this approach permits to describe in detail the formation of several wave groups and particular tsunami characteristics that are strongly dependent on the landslide model. 相似文献
55.
Lobkovsky L. I. Vladimirova I. S. Gabsatarov Yu. V. Steblov G. M. 《Doklady Earth Sciences》2018,481(2):1060-1065
Doklady Earth Sciences - The data of multiannual satellite geodetic observations before, during, and after the 2011 Tohoku earthquake are interpreted on the basis of the keyboard model of the... 相似文献
56.
It is revealing a clear tendency of the fields layered in producing belt of oil-pays, extending in the limit of the sea depth from 400 m to 3000 m at the continental slope and possibly 4000 m at the continental rise. 相似文献
57.
Krylov A. A. Lobkovsky L. I. Rukavishnikova D. D. Baranov B. V. Kovachev S. A. Dozorova K. A. Tsukanov N. V. Semiletov I. P. 《Doklady Earth Sciences》2022,507(1):936-940
Doklady Earth Sciences - The results of new local seismic observations in the Laptev Sea obtained using ocean bottom seismographs were compared with actual data from global and regional earthquake... 相似文献
58.
G. V. Novikov M. E. Mel’nikov L. I. Lobkovsky O. Yu. Bogdanova N. O. Sorokhtin 《Doklady Earth Sciences》2015,465(2):1233-1236
The data on the geological structure of different guyots on the Marcus-Wake rise with cobalt-bearing Fe–Mn crusts are discussed. Crusts are represented by three-layer aggregates composed of one lower phosphatized (I-1) and two upper non-phosphatized (II and III) layers. Fe-vernadite and Mn-feroxygite are the major ore minerals in all studied crusts and their layers. Small contents of vernadite, asbolane–buserite, and goethite are registered. Crusts of guyots on the rise are characterized by a stable concentration of heavy and rare metals (Cotot, Ni, Cu, Zn, Pb, Mo, and Cd) independently of their latitudinal location. 相似文献
59.
N. O. Sorokhtin L. I. Lobkovsky G. V. Novikov N. E. Kozlov O. Yu. Bogdanova S. L. Nikiforov 《Doklady Earth Sciences》2015,465(2):1215-1217
The regularities of the concentration of ore matter in the mid-ocean ridges are considered, and the mechanisms of hydrothermal and cumulative treatment of the crust by ore elements are substantiated. 相似文献
60.
In connection with the intensive development of the northeastern part of the Black Sea, at present a number of serious technical,
scientific, and ecological problems have arisen. As the constructions being raised are of large sizes and they are designed
for a long period of use, the probability of their damage by natural phenomena significantly increases. First of all, these
are phenomena connected with seismotectonic activity. In the present paper, the current concepts about the regional tectonic
structure are considered. Moreover, a detailed analysis of the seismic activity in the Bolshoi Sochi region and the adjacent
regions is conducted in the historical perspective. The basic results of the marine seismic research carried out by the Institute
of Oceanology of the Russian Academy of Sciences on the shelf and the continental slope of the northeastern part of the Black
Sea during the period of 1998–2001 are presented. On the basis of the scheme of the general seismic zoning developed by the
International Expert Group for the Caucasian Region, a scheme of the seismic hazard in the Bolshoi Sochi region has been constructed.
For the specific zones of the region, the values of the seismic hazard characteristics—the maximum shocks and accelerations
and the periods of oscillations under maximum seismic effect—have been calculated. Some ideas concerning the integrated modernization
of the system for seismological observations in this region, including the deployment of autonomous bottom seismographs and
automatic seismographs in almost inaccessible places, are proposed. 相似文献