ANHYDROUS PARTIAL MELTING OF AN IRON-RICH MANTLE II: PRIMARY MELT COMPOSITIONS AT 15 KBAR
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dc.contributor.author | Bertka C.M. | |
dc.contributor.author | Holloway J.R. | |
dc.date.accessioned | 2020-12-04T06:53:53Z | |
dc.date.available | 2020-12-04T06:53:53Z | |
dc.date.issued | 1994 | |
dc.identifier | https://elibrary.ru/item.asp?id=31603996 | |
dc.identifier.citation | Contributions to Mineralogy and Petrology, 1994, , 3, 323-338 | |
dc.identifier.issn | 0010-7999 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/20367 | |
dc.description.abstract | Primary melt and coexisting mineral compositions, at increasing degrees of partial melting at 15 kbar, were determined for an iron-rich martian mantle composition, DW. The composition of primary melts near the solidus was determined with basalt-peridotite sandwich experiments. In order to evaluate the approach of the liquids to equilibrium with a DW mantle assemblage, experiments were also performed to establish the liquidus mineralogy of the primary melts. Primary melt compositions produced from an iron-rich mantle are more picritic than those produced from an iron-poor mantle. By increasing the iron content of a model mantle composition (decreasing the mg#, where mg# = atomic [Mg/(Mg+Fe2+)*100]), picritic and komatiitic magmas result at lower percentages of melting and at temperatures closer to the solidus than in an iron-poor mantle. Terrestrial iron-rich primitive volcanics may be the partial melting products of iron-rich, mg# 80, source regions. The DW partial melting results support the conclusion of previous authors that the parent magmas of the SNC (shergottites, nakhlites, chassignites) meteorites were derived from a source region that had been previously depleted in an aluminous phase. | |
dc.title | ANHYDROUS PARTIAL MELTING OF AN IRON-RICH MANTLE II: PRIMARY MELT COMPOSITIONS AT 15 KBAR | |
dc.type | Статья |
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