Строение и история развития литосферы

Prestvik T. Cenozoic plateau lavas of Spisbergen – a geochemical study. Arbok. Norsk Polarinstituitt. 1977. Oslo. 1978, 129–143.

Ritzmann O. and Jokat W. Crustal structure of northwestern Svalbard and the adjacent Yermak Plateau: evidence for Oligocene detachment tectonics and non-volcanic breakup // Geophys. J. Int. 2003. V. 152. P. 139–159.

Scogseid J., Planke S., Faleide J.I., Pedersen T., Eldholm O., and Neverdal F., 2000. NE Atlantic continental rifting and volcanic margin formation. In Dynamics of the Norwegian Margin. pp 295–326, edit.Nottveld. Geol. Soc. Spec. Pub. 167. The Geol. Society London. London.

Sobolev A. V., Hofmann A. W., Kuzmin D. V., Yaxley G. M., Arndt N. T., Chung S. L., Danyushevsky L. V., Elliott T., Frey F. A., Garcia M. O., Gurenko A. A., Kamenetsky V. S., Kerr A. C., Krivolutskaya N. A., Matvienkov V. V., Nikogosian I. K., Rocholl A., Sigurdsson I. A., Sushchevskaya N. M., and Teklay M. (2007) The amount of recycled crust in sources of mantle-derived melts. Science 316(5823), 412–417.

Sobolev A. V., Hofmann A. W., Sobolev S. V., and Nikogosian I. K. (2005) An olivine-free mantle source of Hawaiian shield basalts. Nature 434(7033), 590–597.

Sobolev, A.V., Hofmann, A.W., Brügmann, G., Batanova, V. G., and Kuzmin, D.V. (2008). A quantitative link between recycling and osmium isotopes. Science, 321, (5888), 536

Tamaki K., Cherkashov G.A., and Knipovich Scientific Party.

Japan-Russian cooperation at the Knipovich Ridge in the Arctic Sea. // InterRidge News. 2001. V.10. N1, 48–51.

Tuff J., Takahashi E., Gibson S.A. Experimental constraints on the role of garnet pyroxenite in the genesis of high-Fe mantle plume derived melts // Journal of Petrology. 2005. V. 46. P. 2023–2058.

Walter M. J. (1998) Melting of garnet peridotite and the origin of komatiite and depleted lithosphere. Journal of Petrology 39(1), 29–60.

Yaxley G. M. and Green D. H. (1998) Reactions between eclogite and peridotite: mantle refertilisation by subduction of oceanic crust. Schweiz. Mineral. Petrogr. Mitt. 78, 243–255.

Yaxley G. M. and Sobolev A. V. (2007) High-pressure partial melting of gabbro and its role in the Hawaiian magma source. Contributions to Mineralogy and Petrology 154(4), 371–383.

A.V. Sobolev[100] and N. M. Sushchevskaya[101]. The role of mantle heterogeneity in the origin of Cenozoic magmas of Knipovich Ridge and Spitsbergen Archipelago

Abstract

The first data on the temporal evolution of mantle source composition of magmas from associated structures of Polar Ocean (Spitsbergen island and Knipovich ridge) were obtained for last 20 m.y. on the base of chemical composition and ⁸⁷Sr/⁸⁶Sr and ¹⁴³Nd/¹⁴⁴Nd isotope ratios of rocks and major and trace elements concentrations in olivine phenocrysts. It is shown that the major source of Spitsbergen Neogene lavas was olivine free pyroxenite with elevated ⁸⁷Sr/⁸⁶Sr and reduced ¹⁴³

Nd/¹⁴⁴Nd ratios which has been likely produced by reaction of recycled oceanic and lower continental crust with peridotite. Due to its high melt productivity, such a pyroxenite may act as a source of substantial amount of magma under thick continental lithosphere thus triggering its breakup. With decreasing age (Neogene-modern) the proportion of pyroxenite component of magmas gradually falls down due to increasing proportion of peridotite component with subsequent progression of composition of Sr and Nd isotopes toward depleted end-member. We explain this evolution by delimitation of continental lithosphere and subsequent decompression melting of peridotitic component.

О.В. Петров[102], А.Ф. Морозов[103], А.А. Лайба[104], С.П. Шокальский[105], Е.А. Гусев[106], М.И. Розинов[107]

, С.А. Сергеев[108], Н.Н. Соболев[109], Т.Н. Корень[110], С.Г. Сколотнев[111], В.А. Дымов[112], И.В. Бильская[113]

Архейские граниты на Северном полюсе