GEOCHEMICAL SIGNATURES FOR ECLOGITE PROTOLITH FROM THE MAKSYUTOV COMPLEX, SOUTH URALS
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dc.contributor.author | Volkova N.I. | |
dc.contributor.author | Frenkel A.E. | |
dc.contributor.author | Budanov V.I. | |
dc.contributor.author | Lepezin G.G. | |
dc.date.accessioned | 2022-09-28T05:54:17Z | |
dc.date.available | 2022-09-28T05:54:17Z | |
dc.date.issued | 2004 | |
dc.identifier | https://elibrary.ru/item.asp?id=13466177 | |
dc.identifier.citation | Journal of Asian Earth Sciences, 2004, 23, 5, 745-759 | |
dc.identifier.issn | 1367-9120 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/38825 | |
dc.description.abstract | We conducted a geochemical study of eclogites (40 samples) from a boudin of the Lower Unit of the Maksyutov Complex in the South Urals in order to determine their protolith nature. The eclogites have major element compositions corresponding to quartz-bearing hypersthene basalts. Trace-element characteristics of the eclogites further suggest that they resemble enriched-type of tholeiites such as E-MORB. The compositional variation of eclogites was likely caused by fractional crystallization of parental melt under hypabyssal conditions, during its intrusion in thinned continental crust shortly before subduction. The high-pressure metamorphism has not affected significantly the major- and trace-element signatures of the protoliths. The compositions of co-existing minerals from the distinguished rock groups do not show significant distinctions. The considerable scatter of P-T estimates of metamorphic conditions does not depend on whole-rock composition. Therefore, the eclogitization was preceded by a chemical differentiation of an initial magmatic source, which is responsible for co-existence of rocks of variable composition in the same boudin. Dikes or sills of tholeiite basalts having geochemical characteristics of E-MORB could be the protoliths for the Maksyutov eclogites. | |
dc.subject | Eclogite | |
dc.subject | Prodith | |
dc.subject | Maksyutov Complex | |
dc.title | GEOCHEMICAL SIGNATURES FOR ECLOGITE PROTOLITH FROM THE MAKSYUTOV COMPLEX, SOUTH URALS | |
dc.type | Статья |
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