Keywords
sea floor relief
structure formation
divergent plate boundaries
Section
Abstract
Main geodynamic environments of ultra-slow spreading on divergent plate boundaries are considered in this paper. Ultra-slow spreading can occur now or could occur in the past in the following geodynamic environments on divergent plate boundaries: 1. on spreading ridges with ultra-slow spreading, both modern and ceased; 2. during transition from continental rifting to early stages of oceanic spreading (all spreading ridges during incipient stages of their formation); 3. during incipient stages of formation of spreading ridges on oceanic crust as a result of ridge jumps and reorganization of plate boundaries; 4. during propagation of spreading ridge into the continental crust caused by a hotspot and strike-slip faults preceding the propagation.
References
Галушкин Ю.И., Дубинин Е.П. Термический режим литосферы при перескоке оси спрединга хребта Математиков // Физика Земли. 1992. № 9. C. 59–69.
Грохольский А.Л., Дубинин Е.П., Кохан А.В., Петрова А.В. Формирование и развитие внеосевых структур в зонах спрединга по результатам экспериментального моделирования // Геотектоника. 2014. № 2. С. 8–22.
Дубинин Е.П., Галушкин Ю.И., Сущевская Н.М. Спрединговые хребты и трансформные разломы / Под ред. Л.И. Лобковского // Мировой океан. Т.1. Геология и тектоника океана. Катастрофические явления в океане // М.: Научный Мир, 2013а. С. 92–170.
Дубинин Е.П., Кохан А.В., Сущевская Н.М. Тектоника и магматизм ультрамедленных спрединговых хребтов // Геотектоника. 2013б. № 3. С. 3–30.
Дубинин Е.П., Свешников А.А. Эволюция литосферы палеоспрединговых хребтов. (Результаты математического моделирования) // Геотектоника. 2000. № 3. С. 72–90.
Кохан А.В., Дубинин Е.П. Тектонические типы ультрамедленных спрединговых хребтов // Жизнь Земли. Геология, геодинамика, экология, музеология. Сб. науч. тр. Музея Землеведения МГУ. Вып. 35/36 / Под. ред. В.А. Садовничего и А.В. Смурова. М.: изд-во МГУ, 2014. С. 124–49.
Кохан А.В., Дубинин Е.П., Грохольский А.Л. Геодинамические особенности структурообразования в спрединговых хребтах Арктики и Полярной Атлантики // Вестник КРАУНЦ. Науки о земле. 2012. № 1. Вып. № 19. С. 59–77.
Лобковский Л.И., Никишин А.М., Хаин В.Е. Современные проблемы геотектоники и геодинамики. М.: Научный мир, 2004. 612 с.
Меланхолина Е.Н. Тектонотип вулканических пассивных окраин в Норвежско-Гренландском регионе // Геотектоника. 2008. № 3. С. 73–96.
Меланхолина Е.Н. Тектонотип невулканических пассивных окраин в регионе Иберии-Ньюфаундленда // Геотектоника. 2011. № 1. С. 80–105.
Пейве А.А. Аккреция океанической коры в условиях косого спрединга // Геотектоника. 2009. № 2. С. 5–19.
Blaich O., Faleide J., Tsikalas F. Crustal breakup and continent ocean transition at South Atlantic conjugate margins // JGR. 2011. V. 116. B01402. doi:10.1029/2010JB007686.
Bosworth W., Huchon P., McClay K. The Red Sea and Gulf of Aden Basins // Journal African Earth Sciences. 2005. V. 43. P. 334–378.
Cannat M., Sauter D., Mendel V. et al. Modes of seafloor generation at a melt-poor ultraslow-spreading ridge // Geology. 2006. V. 34. № 7. P. 605–608.
Corti G. Evolution and characteristics of continental rifting: Analog modeling —inspired view and comparison with examples from the East African Rift System // Tectonophysics. 2012. V. 522–523. P. 1–33.
Courtillot V., C. Jaupart, I. Manighetti, P. Tapponnier, J. Besse. On causal links between flood basalts and continental breakup // Earth Planet.Sci. Letters. 1999. V. 166. № 3–4. P.175–195.
Dauteil O., Huchon P., Quemeneur F., Souriot T. Propagation of an oblique spreading centre: the western Gulf of Aden // Tectonophysics. 2001. V. 332. №4. P. 423–442.
Dean S.L. Sawyer D.S., Morgan J.K. Galicia Bank ocean-continent transition zone: New seismic reflection constraints // Earth Planet. Sci. Letters. 2015. V. 413. P. 197–207.
DeMets C., Gordon R., Argus D. Geologically current plate motions // Geophys. J. Int. 2010. V. 181. № 1. P. 1–80.
Dick H., Lin J., Schouten H. An ultra-slow class of spreading ridge // Nature. 2003. V. 426. P. 405–412.
Desissa, M., N. Johnson, K. Whaler et al. A mantle magma reservoir beneath an incipient mid-ocean ridge in Afar, Ethiopia // Nature geoscience, 2013. V.6 № 10. P. 861–865.
Eagles G., Gloaguen R., Ebinger C. Kinematics of the Danakil microplate // Earth and Planet. Sc. Lett. 2002. V. 203. № 2. P. 607–620.
Ehlers B., Jokat W. Subsidence and crustal roughness of ultra-slow spreading ridges in the northern North Atlantic and the Arctic Ocean // Geophys. J. Int.. 2009. V. 177. № 2. P. 451–462.
Fletcher J.M., Grove M., Kimbrough D. et al. Ridge-trench interactions and the Neogene tectonic evolution of the Magdalena Shelf and southern Gulf of California: insights from detrital zircon U-Pb ages from the Magdalena Fan and adjacent areas // Geol. Soc. Amer. Bull. 2007. V. 119. № 11–12. P. 1313–1336.
Gans P. Large-magnitude Oligo —Miocene extension in southern Sonora: Implications for the tectonic evolution of northwest Mexico // Tectonics. 1997. V. 16. № 3. P. 388–408.
GEBCO_08 grid, ver. 20100927, http://www.gebco.net.
Jarvis A., H.I. Reuter A. Nelson E. Guevara Hole-filled seamless SRTM data V4 // International Centre for Tropical Agriculture (CIAT). 2008. URL http://srtm.csi.cgiar.org
Jokat W., J. Kollofrath, W. H. Geissler, L. Jensen. Crustal thickness and earthquake distribution south of the Logachev Seamount, Knipovich Ridge // Geoph. Res. Lett. 2012. V. 39. L08302. doi:10.1029/2012GL051199.
Jokat W., Schmidt-Aursch M. Geophysical characteristics of the ultraslow spreading Gakkel Ridge, Arctic Ocean // Geophys. J. Int. 2007. V. 168. № 3. P. 983–998.
Lizaralde D., Axen G., Brown H. et al. Variation in styles of rifting in the Gulf of California // Nature. 2007. V. 448. P. 466–469.
Mammerickx J., Sandwell D. Rifting of old Oceanic Lithosphere // JGR. 1986. V. 1. № B7. P. 1975–1988.
Manighetti I., Tapponnier P., Courtillot V. et al. Propagation of rifting along the Arabia-Somalia plate boundary: the Gulfs of Aden and Tadjoura // JGR. 1997. V. 102. P. 2681–2710.
McKenzie D.P. Some remarks on the development of sedimentary basins // Earth Planet. Sci. Lett. 1978. V. 40. № 2. P. 25–32.
Michael P.J., Langmuir C.H., Dick H.J. et al. Magmatic and amagmatic seafloor generation at the ultra-slow spreading Gakkel ridge, Arctic ocean // Nature. 2003. V. 423. P. 956–961.
Okino K., Curewitz D., Asada M., Tamaki K. et al. Preliminary analysis of the Knipovich Ridge segmentation: influence of focused magmatism and ridge obliquity on an ultraslow spreading system // Earth and Planet. Sci. Lett. 2002. V. 202. № 2. P. 275–288.
Rosenbaum G., Weinberg R.F., Regenauer-Leib K. The geodynamics of lithospheric extension // Tectonophysics. 2008. V. 458. № 1–4. P. 1–8.
Rowland J., Baker E., Ebinger C. et al. Afar Fault growth at a nascent slow-spreading ridge: 2005 Dabbahu rifting episode, Afar // Geophys. J. Int. 2007. V. 171. № 3. P. 1226–1246.
Sauter D., Sloan H., Cannat M. et al. From slow to ultra-slow: how does spreading rate affect seafloor roughness and crustal thickness? // Geology. 2011. V. 9. № 10. P. 911–914.
Sauter D., Cannat M., Rouméjon S., et al. Continuous exhumation of mantle-derived rocks at the Southwest Indian Ridge for 11 million years // Nature Geosc. 2013. V. 6. P. 314–320.
Tikku A.A., Cande S.C. On the fit of Broken and Kerguelen plateau // Earth Planet. Sci. Letters. 2000. V. 180. № 1–2. P. 117–132.
Van Wijk J.W. Role of weak zone orientation in continental lithosphere extension // Geophys. Research Letters. 2005. V. 32. doi:10.1029/2004GL022192.
Vigny C., de Chabalier J.-B., Ruegg J.-C. et al. Twenty-five years of geodetic measurements along the Tadjoura-Asal rift system, Djibouti, East Africa // JGR. 2007. V. 112. B06410. doi:10.1029/2004JB003230.
Weinberg R.F., Regenauer-Lieb K. Mantle detachment faults and the breakup of cold continental lithosphere // Geology. 2007. V. 35. № 11. P. 1035–1038; doi: 10.1130/G23918A.1.
Wernicke B. Uniform-sense normal simple shear of the continental lithosphere // Can. J. Earth Sci. 1985. V. 22. P. 108–125.
White R., McKenzie D. Magmatism at rift zones: The generation of volcanic continental margins and flood basalts // JGR. 1989. V.94. № B6. P. 7685–7729.
White R., McKenzie D. Mantle plumes and flood basalts // JGR. 1995. V.100. № B9. P. 17543–17585.
Контент доступен под лицензией Creative Commons Attribution-NonCommercial 4.0 International License.