Stardust Interstellar Preliminary Examination VI: Quantitative elemental analysis by synchrotron X-ray fluorescence nanoimaging of eight impact features in aerogel - Archive ouverte HAL Access content directly
Journal Articles Meteoritics and Planetary Science Year : 2014

Stardust Interstellar Preliminary Examination VI: Quantitative elemental analysis by synchrotron X-ray fluorescence nanoimaging of eight impact features in aerogel

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Alexandre S. Simionovici
  • Function : Author
Peter Cloetens
  • Function : Author
Vicente A. Sole
  • Function : Author
Juan-Angel Sans Tresseras
  • Function : Author
Anna L. Butterworth
  • Function : Author
Andrew J. Westphal
  • Function : Author
Zack Gainsforth
  • Function : Author
Julien Stodolna
  • Function : Author
Carlton Allen
  • Function : Author
David Anderson
Asna Ansari
  • Function : Author
Sasa Bajt
  • Function : Author
Nabil Bassim
  • Function : Author
Ron K. Bastien
  • Function : Author
Hans A. Bechtel
  • Function : Author
Janet Borg
  • Function : Author
Frank E. Brenker
  • Function : Author
John Bridges
  • Function : Author
Donald E. Brownlee
  • Function : Author
Mark Burchell
  • Function : Author
Manfred Burghammer
  • Function : Author
Hitesh Changela
  • Function : Author
Andrew M. Davis
  • Function : Author
Ryan Doll
  • Function : Author
Christine Floss
  • Function : Author
George Flynn
  • Function : Author
David R. Frank
  • Function : Author
Eberhard Gruen
  • Function : Author
Philipp R. Heck
  • Function : Author
Jon K. Hillier
  • Function : Author
Peter Hoppe
  • Function : Author
Bruce Hudson
  • Function : Author
Joachim Huth
  • Function : Author
Brit Hvide
  • Function : Author
Anton Kearsley
  • Function : Author
Ashley J. King
  • Function : Author
Barry Lai
  • Function : Author
Jan Leitner
  • Function : Author
Ariel Leonard
  • Function : Author
Hugues Leroux
  • Function : Author
Robert Lettieri
  • Function : Author
William Marchant
  • Function : Author
Larry R. Nittler
  • Function : Author
Ryan Ogliore
  • Function : Author
Wei Ja Ong
  • Function : Author
Frank Postberg
  • Function : Author
Mark C. Price
  • Function : Author
Scott A. Sandford
  • Function : Author
Sylvia Schmitz
  • Function : Author
Tom Schoonjans
  • Function : Author
Geert Silversmit
  • Function : Author
Ralf Srama
  • Function : Author
Frank J. Stadermann
  • Function : Author
Thomas Stephan
  • Function : Author
Veerle J. Sterken
  • Function : Author
Rhonda M. Stroud
  • Function : Author
Steven Sutton
  • Function : Author
Mario Trieloff
  • Function : Author
Peter Tsou
  • Function : Author
Akira Tsuchiyama
  • Function : Author
Tolek Tyliszczak
  • Function : Author
Bart Vekemans
  • Function : Author
Laszlo Vincze
  • Function : Author
Joshua von Korff
  • Function : Author
Naomi Wordsworth
  • Function : Author
Daniel Zevin
  • Function : Author
Michael E. Zolensky
  • Function : Author

Abstract

Hard X-ray, quantitative, fluorescence elemental imaging was performed on the ID22NI nanoprobe and ID22 microprobe beam lines of the European Synchrotron Research facility (ESRF) in Grenoble, France, on eight interstellar candidate impact features in the framework of the NASA Stardust Interstellar Preliminary Examination (ISPE). Three features were unambiguous tracks, and the other five were identified as possible, but not definite, impact features. Overall, we produced an absolute quantification of elemental abundances in the 15 = Z = 30 range by means of corrections of the beam parameters, reference materials, and fundamental atomic parameters. Seven features were ruled out as interstellar dust candidates (ISDC) based on compositional arguments. One of the three tracks, I1043,1,30,0,0, contained, at the time of our analysis, two physically separated, micrometer-sized terminal particles, the most promising ISDCs, Orion and Sirius. We found that the Sirius particle was a fairly homogenous Ni-bearing particle and contained about 33 fg of distributed high-Z elements (Z 12). Orion was a highly heterogeneous Fe-bearing particle and contained about 59 fg of heavy elements located in hundred nanometer phases, forming an irregular mantle that surrounded a low-Z core. X-ray diffraction (XRD) measurements revealed Sirius to be amorphous, whereas Orion contained partially crystalline material (Gainsforth et al. 2014). Within the mantle, one grain was relatively Fe-Ni-Mn-rich; other zones were relatively Mn-Cr-Ti-rich and may correspond to different spinel populations. For absolute quantification purposes, Orion was assigned to a mineralogical assemblage of forsterite, spinel, and an unknown Fe-bearing phase, while Sirius was most likely composed of an amorphous Mg-bearing material with minor Ni and Fe. Owing to its nearly chondritic abundances of the nonvolatile elements Ca, Ti, Co, and Ni with respect to Fe, in combination with the presence of olivine and spinel as inferred from XRD measurements, Orion had a high probability of being extraterrestrial in origin.

Dates and versions

hal-02351076 , version 1 (06-11-2019)

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Cite

Alexandre S. Simionovici, Laurence Lemelle, Peter Cloetens, Vicente A. Sole, Juan-Angel Sans Tresseras, et al.. Stardust Interstellar Preliminary Examination VI: Quantitative elemental analysis by synchrotron X-ray fluorescence nanoimaging of eight impact features in aerogel. Meteoritics and Planetary Science, 2014, 49 (9, SI), pp.1612--1625. ⟨10.1111/maps.12208⟩. ⟨hal-02351076⟩
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