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Petrography and geochemistry of metals in almahata sitta ureilites
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Downes, H. Jenniskens, P. Ross, A. J. Herrin, J. S. Smith, C. L. Lee, M. R. Jones, A. P. Mittlefehldt, D. W. Shaddad, M. H, |
| Copyright Year | 2011 |
| Description | Ureilites are ultramafic achondrites, predominantly composed of olivine and pyroxenes with accessory carbon, metal and sulfide. The majority of ureilites are believed to represent the mantle of the ureilite parent body (UPB) [1]. Although ureilites have lost much of their original metal [2], the metal that remains retains a record of the formative processes. Almahata Sitta is predominantly composed of unbrecciated ureilites with a wide range of silicate compositions [3,4]. As a fall it presents a rare opportunity to examine fresh ureilite metal in-situ, and analyzing their highly siderophile element (HSE) ratios gives clues to their formation. Bulk siderophile element analyses of Almahata Sitta fall within the range observed in other ureilites [5]. We have examined the metals in seven ureilitic samples of Almahata Sitta (AS) and one associated chondrite fragment (AS#25). |
| File Size | 199937 |
| Page Count | 2 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20110005575 |
| Archival Resource Key | ark:/13960/t3zs7qs0w |
| Language | English |
| Publisher Date | 2011-01-01 |
| Access Restriction | Open |
| Subject Keyword | Geophysics Olivine Sulfides Pyroxenes Petrography Metals Mineralogy Geochemistry Silicates Carbon 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 |
