SUBDUCTION-RELATED ANATECTIC GRANITOIDS OF THE URALS
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dc.contributor.author | Fershtater G.B. | |
dc.contributor.author | Bea F. | |
dc.contributor.author | Borodina N.S. | |
dc.contributor.author | Zin'kova E.A. | |
dc.contributor.author | Montero P. | |
dc.contributor.author | Shagalov E.S. | |
dc.date.accessioned | 2021-07-20T07:47:14Z | |
dc.date.available | 2021-07-20T07:47:14Z | |
dc.date.issued | 2002 | |
dc.identifier | https://elibrary.ru/item.asp?id=14995042 | |
dc.identifier.citation | Geologiya i geofizika, 2002, 43, 1, 42-56 | |
dc.identifier.issn | 0016-7886 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/29770 | |
dc.description.abstract | The most intense subduction-related anatexis in the Urals occured in the late Early Carboniferous (340-320 Ma). It is characterized by high water saturation (PH2O = 0.7 1.OPtot) of the generated melts, caused by additional supply of water into the zone of anatexis. Anatexis occurs in the zone of stability of main hydroxyl-bearing minerals - biotite and hornblende accumulated in restite. Anatectic melt is either of tonalite or granodiorite composition. This composition of melt is due to a basite substratum whose degree of melting provides about 40% of melt sufficient for separation from the substratum. Outmelting of granitoid melts is accompanied by water basite magmatism. The products of this magmatism are represented by high-Sr hornblende gabbros, which are the source of heat and matter (substratum) for anatexis. Gabbroids and products of crystallization of anatectic melt share the mineral composition: Hbl + B1 + An20-45 + Ep± ± Kfs ± Q + Sph + Ap + I1m ± Mt. Prolonged basite magmatism increased the crust thickness from below, thus causing its underplating in a suture megablock, in the adjacent island-arc zones, and in the regions of development of subduction-related tonalite-granodiorite massifs in the continent-marginal zones. | |
dc.title | SUBDUCTION-RELATED ANATECTIC GRANITOIDS OF THE URALS | |
dc.type | Статья |
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