DEVELOPMENT OF THE TECHNIQUE FOR EXPERIMENTAL STUDY OF SEA EARTH CRUST STRUCTURE IN DIFFERENT SEASONS
V.I. Ilyichev Pacific Oceanological Institute, Far Eastern Branch, Russian Academy of Sciences
Journal: Seismic instruments
Tome: 54
Number: 4
Year: 2018
Pages: 14-27
UDK: 550.347
DOI: 10.21455/si2018.4-2
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Dolgikh G.I., Budrin S.S., Dolgikh S.G., Pivovarov A.A., Samchenko A.N., Chupin V.A., Shvets V.A., Shvyrev A.N., Yakovenko S.V., Yaroshchuk I.O. DEVELOPMENT OF THE TECHNIQUE FOR EXPERIMENTAL STUDY OF SEA EARTH CRUST STRUCTURE IN DIFFERENT SEASONS // . 2018. Т. 54. № 4. С. 14-27. DOI: 10.21455/si2018.4-2
@article{DolgikhDEVELOPMENT2018,
author = "Dolgikh, G. I. and Budrin, S. S. and Dolgikh, S. G. and Pivovarov, A. A. and Samchenko, A. N. and Chupin, V. A. and Shvets, V. A. and Shvyrev, A. N. and Yakovenko, S. V. and Yaroshchuk, I. O.",
title = "DEVELOPMENT OF THE TECHNIQUE FOR EXPERIMENTAL STUDY OF SEA EARTH CRUST STRUCTURE IN DIFFERENT SEASONS",
journal = "Seismic instruments",
year = 2018,
volume = "54",
number = "4",
pages = "14-27",
doi = "10.21455/si2018.4-2",
language = "English"
}
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Keywords: low-frequency hydroacoustic transmitter, phase-shift keyed signals, convolution, laser strainmeter, sea crust, wave velocities, model
Аnnotation: A technique for experimental studies of the structure and composition of the marine crust during the warm and cold seasons of the year is described. The technique is based on the use of an electromagnetic-type low-frequency hydroacoustic emitter, creating complex phase-shift keyed signals (M-sequences) with a center frequency of 33 Hz in water, and a mobile laser strainmeter with a measuring arm length of 6 m. With a sea depth in the transmitter location of 14 m, the transmitter was submerged to a depth of 12 m. As a result of the obtained experimental data processing, in the laser strainmeter records five arrivals of the emitted phase-shift keyed signals were revealed. They propagated along the layer boundaries in the upper part of the marine crust. The propagation velocities are calculated as following: In winter approximately 2600, 2140, 1750, 1550 and 1280 m/s, and in spring 2250, 1950, 1700, 1480 and 1300 m/s. The calculated velocity values agree well with the model data. The results obtained will allow creating a technology for remote study of the structure and composition of the sea crust in the shelf zones, including those covered with ice, without destroying it.