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11.
New methods are presented for processing and interpretation of shallow marine differential magnetic data,including constructing maps of offshore total magnetic anomalies with an extremely high resolution of up to 1-2 nT,mapping weak anomalies of 5-10 nT caused by mineralization effects at the contacts of hydrocarbons with host rocks,estimating depths to upper and lower boundaries of anomalous magnetic sources,and estimating thickness of magnetic layers and boundaries of tectonic blocks. Horizontal dimensions of tectonic blocks in the so-called "seismic gap" region in the central Kuril Arc vary from 10 to 100 km,with typical dimensions of 25-30 km.The area of the "seismic gap" is a zone of intense tectonic activity and recent volcanism.Deep sources causing magnetic anomalies in the area are similar to the "magnetic belt" near Hokkaido. In the southern and central parts of Barents Sea,tectonic blocks with widths of 30-100 km,and upper and lower boundaries of magnetic layers ranging from depths of 10 to 5 km and 18 to 30 km are calculated.Models of the magnetic layer underlying the Mezen Basin in an inland part of the White Sea-Barents Sea paleorift indicate depths to the lower boundary of the layer of 12-30 km.Weak local magnetic anomalies of 2-5 nT in the northern and central Caspian Sea were identified using the new methods,and drilling confirms that the anomalies are related to concentrations of hydrocarbon.Two layers causing magnetic anomalies are identified in the northern Caspian Sea from magnetic anomaly spectra.The upper layer lies immediately beneath the sea bottom and the lower layer occurs at depths between 30-40 m and 150-200 m. 相似文献
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Skolotnev S. G. Peyve A. A. Sanfilippo A. Ivanenko A. N. Ligi M. Veklich I. A. Petracchini L. Ponomarenko E. P. Basch V. Kuleshov D. A. Ferrando C. Dobrolyubov V. N. Sani C. Shkittin N. A. Bickert M. Dokashenko S. A. Muccini F. Yakovenko E. S. Palmiotto C. Pugacheva T. L. Cuffaro M. 《Oceanology》2022,62(4):575-577
Oceanology - We provide information on geological and geophysical investigations of the structure of the area between the Bight and Charlie Gibbs transform faults in the North Atlantic during... 相似文献
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Skolotnev S. G. Sanfilippo A. Peyve A. A. Nestola Y. Sokolov S. Yu. Petracchini L. Dobrolybova K. O. Basch V. Pertsev A. N. Ferrando C. Ivanenko A. N. Sani C. Razumovskii A. A. Muccini F. Bich A. S. Palmiotto C. Brusilovsky Y. V. Bonatti E. Sholukhov K. N. Cuffaro M. Veklich I. A. Ligi M. Dobrolybov V. N. 《Doklady Earth Sciences》2021,497(1):191-194
Doklady Earth Sciences - The geological and geophysical data obtained during the 50th cruise of R/V Akademik Nikolaj Strakhov on the Charlie Gibbs megatransform system structure... 相似文献
14.
Skolotnev S. G. Peyve A. A. Ivanenko A. N. Dobrolyubova K. O. Sanfilippo A. Ligi M. Sokolov S. Yu. Veklich I. A. Petracchini L. Basch V. Ferrando C. Sani C. Bickert M. Muccini F. Palmiotto C. Cuffaro M. Kuleshov D. A. Dobrolyubov V. N. Shkittin N. A. Dokashenko S. A. Yakovenko E. S. 《Doklady Earth Sciences》2022,504(2):333-337
Doklady Earth Sciences - The geological structure of a large volcanic edifice in the eastern flank of the large Charlie Gibbs Fracture Zone in the region of the Eastern Thule submarine rise (North... 相似文献
15.
A mathematical model is proposed to describe the urban reach of the Moskva River. The model allows estimating the stream characteristics for the period of spring flood passage, hydraulic washing of the channel with allowance for different regimes of water flow at overflow dams. It is shown that this model can be used to construct the curves of throughput capacity of overflow dams as well as the levels of water surface and the boundaries of inundation zones and the flow rates and velocities within the city. 相似文献
16.
General approaches to solving the problems of open flow dynamics are discussed. Most attention is concentrated on the selection of numerical methods, construction of special computational grids, numerical experiments, and analysis of the adequacy of the obtained solution to the field observation results. The results of effective solution of some important practical problems are given to illustrate the potentialities of computational technologies. 相似文献
17.
Abstract A copepod nauplius of the family Dirivultidae Humes & Dojiri 1980 is described for the first time. The lecithotrophic nauplius of the widespread symbiotic copepod Stygiopontius pectinatus Humes 1987 was released from females bearing paired egg sacs that included only one yolky embryo each. The ovigerous females of S. pectinatus were washed from the branchial chamber of alvinocaridid shrimps ( Rimicaris exoculata Williams & Rona 1986 ) collected at a deep-sea hydrothermal field on the Mid-Atlantic Ridge at 5° S (Red Lion site, chimney 'Shrimps Farm', depth 3,048 m) by ROV Quest 4000 and maintained in a laboratory on the R/V METEOR (cruise M64/1, 2005). The nauplius of S. pectinatus , appears to be a stage I nauplius because it bears only one pair of caudal setae and the setose bud of maxilla 1 is absent. Like nauplii of other copepods of the order Siphonostomatoida, this nauplius of S. pectinatus possesses a reduced labrum and the body is filled with yolky granules; it also lacks a masticatory process on the antennal coxa. The presence of two inner setae (instead of one seta) on the mandibular endopod is hypothesized to be a primitive character of dirivultids that distinguishes them from the remaining siphonostomatoid genera. The Dirivultidae is a widespread and diverse family of copepods endemic to the deep-sea hydrothermal vents of the Pacific and Atlantic Oceans. Morphological features of the planktonic nauplius of S. pectinatus suggest nutritional independence during their dispersal. 相似文献
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The first successful experience of the spatial-temporal magnetometry application in the Caspian Sea has been described. The differential and integral curves have been obtained and the magnetic anomaly has been detected during low geomagnetic activity. 相似文献
19.