NDLI: Metal-silicate segregation in asteroidal meteorites

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Metal-silicate segregation in asteroidal meteorites

Content Provider	NASA Technical Reports Server (NTRS)
Author	Herrin, Jason S. Mittlefehldt, D. W.
Copyright Year	2006
Description	A fundamental process of planetary differentiation is the segregation of metal-sulfide and silicate phases, leading eventually to the formation of a metallic core. Asteroidal meteorites provide a glimpse of this process frozen in time from the early solar system. While chondrites represent starting materials, iron meteorites provide an end product where metal has been completely concentrated in a region of the parent asteroid. A complimentary end product is seen in metal-poor achondrites that have undergone significant igneous processing, such as angrites, HED's and the majority of aubrites. Metal-rich achondrites such as acapulcoite/lodranites, winonaites, ureilites, and metal-rich aubrites may represent intermediate stages in the metal segregation process. Among these, acapulcoite-lodranites and ureilites are examples of primary metal-bearing mantle restites, and therefore provide an opportunity to observe the metal segregation process that was captured in progress. In this study we use bulk trace element compositions of acapulcoites-lodranites and ureilites for this purpose.
File Size	64550
Page Count	2
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20060056234
Archival Resource Key	ark:/13960/t19k99m79
Language	English
Publisher Date	2006-01-01
Access Restriction	Open
Subject Keyword	Lunar And Planetary Science And Exploration Ureilites Sulfides Separation Metallicity Melts Crystal Growth Asteroids Meteoritic Composition Siderophile Elements Iron Meteorites Silicates Achondrites Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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