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1.
Al. A. Schreider A. A. Schreider A. E. Sazhneva V. A. Sychev O. A. Zuev 《Oceanology》2016,56(5):721-732
Prior to extension of the lithosphere in the Eurasia Basin, the Yermak Plateau was an element of the Eurasian Arctic margin. Extension of the Barents Sea shelf culminated gradually in rifting of the continental crust with separation of this block from the continent during Chrons C25r?C26n (57.656?59.237 Ma ago) and emplacement of numerous basic dikes, which could be responsible for the formation of high-amplitude magnetic anomalies on the Yermak Plateau. The investigation included reconstruction of axes in the breakup zones along peripheral continental fragments of Spitsbergen with determination of the Euler poles and angles of rotation, which describe the kinematics of this process. It is revealed that the difference between depths of conjugate isobaths can be as large as many tens of meters, which reflects the nonuniformly scaled slide of peripheral areas of the continental crust along the plane of the crustal-penetrating fault and, correspondingly, their different subsidence during rifting. 相似文献
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Schreider Al. A. Schreider A. A. Sazhneva A. E. Kluev M. S. Brehovskih A. L. 《Oceanology》2019,59(1):133-142
Oceanology - A new map of the axes of linear magnetic anomalies for eastern regions of the Eurasian Basin has been compiled. Based on the results of Russian geomagnetic surveys, paleoanomaly C25... 相似文献
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In order to enhance the efficiency of the interpretation of surface images obtained with a side scanning sonar, it is proposed to supplement the standard processing software with a program for obtaining acoustic stereo images. Examples of such images synthesized with this program using the data of a bottom sonar survey with a side scanning sonar and an echo sounder are presented. The cases are considered when the information on the bottom relief contained in sonar images obtained with a standard side scanning sonar or its modifications can be used instead of the data of an echo sounding survey. 相似文献
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A. A. Schreider A. A. Ignatova Al. A. Schreider A. E. Sazhneva P. Yu. Pugin 《Oceanology》2017,57(6):864-869
Data on the virtual dipole moment (VDP) is distributed nonuniformly with time, which significantly complicates qualitative and quantitative analysis of its evolution. In addition to the moving average method and median values, for the first time, a technique is presented for a quasi-uniform presentation of data (interpolation method), as well as results of calculating the evolution of the VDM by this method for the Phanerozoic. 相似文献
5.
Al.?A.?SchreiderEmail author A.?A.?Schreider J.?Galindo-Zaldivar A.?Maldonado A.?E.?Sazhneva E.?I.?Evsenko 《Oceanology》2017,57(2):328-336
Integrated geological and geophysical analysis of the anomalous magnetic field along with the previously unpublished profiles of Spanish expeditions onboard the R/V Hesperides and international databases of geomagnetic data processed in the context of the global tectonics concepts made it possible to identify paleomagnetic anomalies C11–C15 and compile the first map of the bottom geochronology of the Scan Basin. Unlike in earlier known publications, the paleoaxis of spreading does extend northeast, but approximately at an angle of 345°. According to calculations, spreading began 35.294?35.706 Ma ago during chron C15r, and the spreading paleoaxis was abandoned 29.527?29.970 Ma ago during chron C11n.2n. Thus, the destruction of the American–Antarctic bridge in the region joining the Bruce and Discovery banks with formation of oceanic crust in the Scan Basin started about 36 Ma ago. Regular spreading of the bottom has been continuing for about 6 Ma at a average rate close to 1.8 cm/year. 相似文献
6.
Schreider A. A. Sazhneva A. E. Kluev M. S. Brehovskih A. L. Rakitin I. Ya Zuev O. A. 《Oceanology》2019,59(2):257-266
Oceanology - The Lincoln Sea floor evolved during stretching of a segment of the continental Greenland –Barents Sea shelf. Prior to the onset of extension, the continental shallow-water... 相似文献
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A. E. Sazhneva 《Oceanology》2009,49(4):575-577
A method for synthesizing 3D images of scanned objects based on the output data of bathymetric and amplitude channels obtained
from intereferometric side scan sonar is discussed. 相似文献
9.
Oceanology - Data of the International Bank of Digital Information on the time distribution of the virtual dipole moment (VDM), supplemented by data of more recent studies (a total of 5645 values),... 相似文献
10.
Al. A. Schreider A. A. Schreider A. E. Sazhneva J. Galindo-Zaldivar P. Ruano A. Maldonado Y. Martos-Martin F. Lobo 《Oceanology》2018,58(1):133-136
The structure of sediments in the Scotia Sea is used as a basis for reconstructing the geological history of its bottom in the Late Quaternary. The Scan Basin is one of the main elements of the topography of the southern Scotia Sea. Its formation played a considerable role in the fragmentation of the continent, which included the Bruce and Discovery banks. The main parameters of the sediment layer in the Scan Basin have been reconstructed by the present time, but its top part has not been studied. In this work, we analyze the first data obtained on the R/V Gesperidas with the use of a TOPAS PS 18/40 high-resolution seismic profilograph in 2012. Three layers in the subsurface sediments on the bottom of the Scan Basin were specified for the first time. The mean periods of their deposition in the Late Quaternary were determined as 115000 years for the first, 76000 years for the second, and 59 000 years for the third layer from the surface of the bottom. The duration of the total accumulation period of the three layers is about 250000 years. 相似文献