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Mineralogy and petrology of comet 81P/Wild 2 nucleus samples | | Michael E Zolensky
; Thomas J Zega
; Hajime Yano
; Sue Wirick
; Andrew J Westphal
; Mike K Weisberg
; Iris Weber
; Jack L Warren
; Michael A Velbel
; Akira Tsuchiyama
; Peter Tsou
; Alice Toppani
; Naotaka Tomioka
; Kazushige Tomeoka
; Nick Teslich
; Mitra Taheri
; Jean Susini
; Rhonda Stroud
; Thomas Stephan
; Frank J Stadermann
; Christopher J Snead
; Steven B Simon
; Alexandre Simionovici
; Thomas H See
; François Robert
; Frans J M Rietmeijer
; William Rao
; Murielle C Perronnet
; Dimitri A Papanastassiou
; Kyoko Okudaira
; Kazumasa Ohsumi
; Ichiro Ohnishi
; Keiko Nakamura-Messenger
; Tomoki Nakamura
; Smail Mostefaoui
; Takashi Mikouchi
; Anders Meibom
; Graciela Matrajt
; Matthew A Marcus
; Hugues Leroux
; Laurence Lemelle
; Loan Le
; Antonio Lanzirotti
; Falko Langenhorst
; Alexander N Krot
; Lindsay P Keller
; Anton T Kearsley
; David Joswiak
; Damien Jacob
; Hope Ishii
; Ralph Harvey
; Kenji Hagiya
; Lawrence Grossman
; Jeffrey N Grossman
; Giles A Graham
; Matthieu Gounelle
; Philippe Gillet
; Matthew J Genge
; George Flynn
; Tristan Ferroir
; Stewart Fallon
; Sirine Fakra
; Denton S Ebel
; Zu Rong Dai
; Patrick Cordier
; Benton Clark
; Miaofang Chi
; Anna L Butterworth
; Donald E Brownlee
; John C Bridges
; Sean Brennan
; Adrian Brearley
; John P Bradley
; Pierre Bleuet
; Phil A Bl
; Ron Bastien
; | | Date: |
15 Dec 2006 | | Journal: | Science, 314 (5806), 1735-9 | | Abstract: | The bulk of the comet 81P/Wild 2 (hereafter Wild 2) samples returned to Earth by the Stardust spacecraft appear to be weakly constructed mixtures of nanometer-scale grains, with occasional much larger (over 1 micrometer) ferromagnesian silicates, Fe-Ni sulfides, Fe-Ni metal, and accessory phases. The very wide range of olivine and low-Ca pyroxene compositions in comet Wild 2 requires a wide range of formation conditions, probably reflecting very different formation locations in the protoplanetary disk. The restricted compositional ranges of Fe-Ni sulfides, the wide range for silicates, and the absence of hydrous phases indicate that comet Wild 2 experienced little or no aqueous alteration. Less abundant Wild 2 materials include a refractory particle, whose presence appears to require radial transport in the early protoplanetary disk. | | Source: | PubMed, pmid17170295 doi: 10.1126/science.1135842 | | Services: | Forum | Review | Favorites | |
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