Computer simulations of iron in magnesium silicate perovskite
نویسندگان
چکیده
منابع مشابه
Computer Simulations of Iron in Magnesium Silicate Perovskite
We use atomistic computer simulation techniques to investigate the site partitioning of iron in (Mg,Fe)SiO 3 perovskites. Our calculations predict that the most energetically favourable reaction for iron substitution will be a direct exchange ofFe 2+ for Mg 2+. Substitution f Fe into the octahedral site and Si into the 8-12 fold coordinated site, as proposed by Jackson et al. [1987], is predict...
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The electronic spin and valence states of iron in lower-mantle silicate perovskite have been previously investigated at high pressures using various experimental and theoretical techniques. However, experimental results and their interpretation remain highly debated. Here we have studied a wellcharacterized silicate perovskite starting sample [(Mg0.9,Fe0.1)SiO3] in a chemically inert Ne pressur...
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Mineral Compositions in Xenoliths from Malaita The report by Collerson et al. (1) of transition zone and lower mantle phases in mantle-derived material from alnöite pipes on Malaita, Solomon Islands, is highly significant in view of the rarity of such natural assemblages. Malaita is part of the obducted southern margin of the Ontong Java Plateau, an area of overthickened oceanic crust (2–7) tha...
متن کاملHow much heat and REE in calcium silicate perovskite?
A number of geochemical arguments suggest the existence of a deep mantle reservoir enriched in noble gases and heat producing elements and having a subchondritic Nd/Nd ratio [1-4]. To test this hypothesis, the affinity of these elements for the phases involved in the differentiation of the deep mantle must be determined. Partitioning data between Mgand Ca-silicate perovskites and silicate melts...
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 1989
ISSN: 0094-8276
DOI: 10.1029/gl016i012p01399