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THE STRUCTURE OF THE TECTONOSPHERE OF THE METEOR AND ISLAS ORCADAS RISES BASED ON THE ANALYSIS OF POTENTIAL FIELDS
Lomonosov Moscow State University
Journal: Geophysical research
Tome: 23
Number: 4
Year: 2022
Pages: 5-22
UDK: 550.831; 551.241
DOI: 10.21455/gr2022.4-1
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Ryzhova
M.V D.A. THE STRUCTURE OF THE TECTONOSPHERE OF THE METEOR AND ISLAS ORCADAS RISES BASED ON THE ANALYSIS OF POTENTIAL FIELDS // . 2022. Т. 23. № 4. С. 5-22. DOI: 10.21455/gr2022.4-1
@article{Ryzhova
M.VTHE2022,
author = "Ryzhova
M.V, D. A.",
title = "THE STRUCTURE OF THE TECTONOSPHERE OF THE METEOR AND ISLAS ORCADAS RISES BASED ON THE ANALYSIS OF POTENTIAL FIELDS",
journal = "Geophysical research",
year = 2022,
volume = "23",
number = "4",
pages = "5-22",
doi = "10.21455/gr2022.4-1",
language = "English"
}
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Keywords: the southern part of the Atlantic Ocean, potential fields, the Earth's crust, the Islas Orcadas and Meteor rises.
Аnnotation: The features of potential fields characterizing the Islas Orcadas and Meteor underwater rises located in the South Atlantic are considered. These rises are located to the west and to the east from the axis of the southern segment of the Mid-Atlantic Ridge at approximately the same distance. Density modeling was performed along the profiles intersecting indicated rises. The analysis of potential fields and the results of density modeling showed a generally similar structure of the crust and lithosphere of the Islas Orcadas rise and the Meteor rise, which confirms the general nature of their formation as a result of the split in lithosphere of small Agulhas plate, due to kinematic restructuring, which led to the death of the Agulhas ridge and the formation of the southern segment of the Mid-Atlantic Ridge. However, some features are noted in the density structure of these rises, both
along their north-south stretch, where the influence of hot spots on the warming of the mantle is particularly evident, and along
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Brenner C., LaBrecque J.L., Bathymetry of the Georgia Basin and environs, Proceedings of the Ocean Drilling Program, Initial Reports, 1988, vol. 114, pp. 23-26. doi: 10.2973/odp.proc.ir.114.102.1988
Bulychev A.A., Gainanov A.G., Gilod D.A., Zolotaya L.A., Mazo E.L., Fedorova T.P., Chuikova N.A., Kazaryan S.A., Quantitative interpretation of satellite geophysical data, Izvestiya, Physics of the Earth, 1996, vol. 32, no. 3, pp. 197-203.
Bulychev A.A., Krivosheya K.V., Melikhov V.R., Zaltsman R.V., Calculation of the anomalous gravitational potential and its derivatives on a sphere, Moscow University Geology Bulletin, 1998, vol. 53, no. 2, pp. 42-46.
Ciesielski P.F., Kristoffersen Y., Shipboard Scientific Party. Site 702, Proceedings of the Ocean Drilling Program, Scientific Results, 1988a, vol. 114, pp. 483-548. doi: 10.2973/odp.proc.ir.114.109.1988
Ciesielski P.F., Kristoffersen Y., Shipboard Scientific Party. Site 704, Proceedings of the Ocean Drilling Program, Scientific Results, 1988b, vol. 114, pp. 621-796. doi: 10.2973/odp.proc.ir.114.111.1988
Chepigo L.S., GravInv2D: Programmnoe obespechenie dlya dvumernogo plotnostnogo modelirovaniya, Svidetel'stvo o registratsii prav na programmnoe obespechenie (Certificate of registration of rights to the Software), 2019, № 2019662512. [In Russian].
Clement B.M., Hailwood E.A., Magnetostratigraphy of Sediments from Sites 701 and 702, Proceedings of the Ocean Drilling Program. Scientific Results, 1991, vol. 114, pp. 359-366.
Gainanov A.G., Panteleev V.L., Morskaya gravirazvedka. Uchebnoe posobie dlya vuzov (Marine gravity exploration. Textbook for geophysical specialties of universities), Moscow, Nedra, 1991, 213 p. [In Russian].
Dubinin E.P., Sushchevskaya N.M., Grokholsky A.L., The history of the development of the spreading ridges of the South Atlantic and the spatio-temporal position of the Bouvet triple junction, Rossiiskii zhurnal nauk o Zemle (Russian Journal of Earth Sciences), vol. 1, no. 5, pp. 423-443. [In Russian].
Evans H.F., Westerhold T., Channell J.E.T., ODP Site 1092: Revised Composite Depth Section has Implications for Upper Miocene 'Cryptochrons', Geophysical Journal International, 2004, vol. 156, Iss. 2, pp. 195-199. doi.org/10.1111/j.1365-246X.2003.02189.x
Kent D.V., Gradstein F.M., A Jurassic to recent chronology, The Western North Atlantic Region. Geological Society of America, 1986, pp. 45-50. doi.org/10.1130/DNAG-GNA-M
LaBrecque J.L., Hayes D.E., Seafloor spreading history of the Agulhas Basin, Earth and Planetary Science Letters, 1979, vol. 45, pp. 411-428.
LaBrecque J.L., Ciesielski P.F., Clement B., Leg 114. Subantarctic South Atlantic, Ocean Drilling Program, Scientific Prospectus, 1987, no. 14, 135 p.
Raymond C.A., LaBrecque J.L., Geophysical signatures of the Agulhas fracture zone ridge and Meteor Rise, Indo-Atlantic basin, Proceedings of the Ocean Drilling Program, Initial Reports, 1988, vol. 114, pp. 27-33.
Raymond C.A., LaBrecque J.L., Kristoffersen Y., Islas Orcadas Rise and Meteor Rise: the tectonic and depositional history of two aseismic plateaus from sites 702, 703, and 704, Proceedings of the Ocean Drilling Program, Scientific Results, 1991, vol. 114, pp. 5-22.
Reguzzoni M., Sampietro D., GEMMA: An Earth crustal model based on GOCE satellite data, International Journal of Applied Earth Observation and Geoinformation, 2015, vol. 35, pp. 31-43.
Roex A.L., Class C., O’Connor J.M., Jokat W., Shona and Discovery Aseismic Ridge Systems, South Atlantic: Trace Element Evidence for Enriched Mantle Sources, Journal of Petrology, 2010, vol. 51, pp. 2089-2120.
Meyer B., Chulliat A., Saltus R., Derivation and Error Analysis of the Earth Magnetic Anomaly Grid at 2 arc min Resolution Version 3 (EMAG2v3), Geochemistry, Geophysics, Geosystems, 2017, vol. 18, no. 12, pp. 4522-4537. doi.org/10.1002/2017GC007280.
Muller R.D., Sdrolias M., Gaina C., Roest W.R., Age, spreading rates, and spreading asymmetry of the world's ocean crust, Geochemistry, Geophysics, Geosystems, 2008, vol. 9, no. 4, 19 p.
Sandwell D.T., Müller R.D., Smith W.H.F., Garcia E., Francis R., New global marine gravity from CryoSat-2 and Jason-1 reveals buried tectonic structure, Science, 2014, vol. 346, no. 6205, pp. 65-67. doi: 10.1126/science.1258213
Simmons N.A., Myers S.C., Johannesson G., Matzel E., LLNL-G3Dv3: Global P wave tomography model for improved regional and teleseismic travel time prediction, Journal of Geophysical Research: Solid Earth, 2012, vol. 117, no. B10, 28 p. doi: 10.1029/2012JB009525
Sleep N.H., Ridge-crossing mantle plumes and gaps in tracks, Geochemistry, Geophysics, Geosystems, 2002, vol. 3, no. 12, pp. 1-33. doi.org/10.1029/2001GC000290
Sorokhtin O.G., Dependence of the topography of the mid-ocean ridges on the speed of the ocean floor extension, Doklady AN SSSR (Report of the USSR Academy of Sciences), 1973, vol. 208, no. 6, pp. 1338-1341. [In Russian].
Whittaker J.M., Goncharov A., Williams S.E., Muller R.D., Leitchenkov G., Global sediment thickness data set updated for the Australian-Antarctic Southern Ocean, Geochemistry, Geophysics, Geosystems, 2013, vol. 14, no. 8, pp. 3297-3305. doi: 10.1002/ggge.20181
