ВУЛКАНИТЫ С ВКРАПЛЕННИКАМИ МАГМАТИЧЕСКОГО ЭПИДОТА ИЗ ОКРЕСТНОСТЕЙ ЕКАТЕРИНБУРГА, УРАЛ
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dc.contributor.author | Прибавкин С.В. | |
dc.date.accessioned | 2022-12-23T03:39:55Z | |
dc.date.available | 2022-12-23T03:39:55Z | |
dc.date.issued | 2005 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=9155361 | |
dc.identifier.citation | Записки Российского минералогического общества, 2005, 134, 6, 92-102 | |
dc.identifier.issn | 0869-6055 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/41201 | |
dc.description.abstract | For the first time, subvolcanic dikes of andesitcs and dacites containing intratelluric phenocrysts of magma-tic cpidote (Ps 16-20), garnet, titanite and other minerals, have been discovered and described at the Urals. Calculated P-T conditions of equilibrium, carried for hornblende, garnet, epidote phenocrysts, has show that they were formed from the rich-in-water melt under pressure of 9-10 kbar, temperature about 800 °C and high fuga-city of oxygen (/02 < -12)- Phenocrysts were rapidly carried by this melt up to the surface, it is indicated by their sound safety without reactionary margins. The andesidacite magma was probably formed in conditions of a local extension of the earth crust in the abovc-subduction zone of the Middle Urals continental margin in the Early-Carboniferous time. Unusual geochemical characteristics of the rocks (low concentration of REE, positive anomaly of Sr, Ba, Zr, Hf, Ti) correspond to that type of tectonic setting. | |
dc.title | ВУЛКАНИТЫ С ВКРАПЛЕННИКАМИ МАГМАТИЧЕСКОГО ЭПИДОТА ИЗ ОКРЕСТНОСТЕЙ ЕКАТЕРИНБУРГА, УРАЛ | |
dc.type | Статья | |
dc.subject.udc | 549.618.3+622.353(470.5) |
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