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A Consortium status report: the characterisation of the asteroid Itokawa regolith - a correlated study by X-ray tomography, micro-raman spectroscopy, and high-sensitivity noble gas analysis

Busemann, H. and Alwmark, C. and Bajt, S. and Böttger, Ute and Gilmour, J.D. and Heitmann, U. and Hübers, Heinz-Wilhelm and Meier, M.M.M. and Pavlov, S.G. and Schade, U. and Spring, N.H. and Weber, I. (2013) A Consortium status report: the characterisation of the asteroid Itokawa regolith - a correlated study by X-ray tomography, micro-raman spectroscopy, and high-sensitivity noble gas analysis. 44th LPSC, 18.-22. Mrz. 2013, USA.

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Abstract

Precious samples from S-type as-teroid 25143 Itokawa have been sampled by the JAXA (Japanese Space Agency) Hayabusa mission in 2005 and returned to Earth in 2010. Itokawa is, succeeding the Moon and comet Wild 2, the third planetary body successfully probed by a sample return mission. The initial studies revealed that Itokawa consists mostly of type LL5-6 material. It experienced severe surface alteration due to space weathering, as docu-mented by surficial, nanosize S-and Fe-bearing phases in some grains. Noble gas studies indicate that Itokawa experiences a surprisingly intense surface loss at a rate of tens of cm/Ma, implying that Itokawa (largest dimension ~540 m) will be destroyed quickly. We received material through JAXA in Sept. 2012 and aim to analyze noble gases in Itokawa samples with high sensitivity, including Kr and Xe, which could not be studied previously, because of the low concentrations. We will combine the noble gas studies with scanning microRaman spectroscopy, Fourier-transform infrared spectroscopy (FTIR), and synchro-tron radiation X-ray tomographic microscopy (SRXTM). These provide non-destructive characteri-zations of grain density, mineralogy, structure, and potential space weathering, which are essential to as-sess gas concentrations of potentially present cosmogenic, solar, trapped and radiogenic compo-nents. Here, we summarize the work of our consortium performed so far. Further studies will be presented at the meeting.

Item URL in elib:https://elib.dlr.de/81822/
Document Type:Conference or Workshop Item (Speech)
Title:A Consortium status report: the characterisation of the asteroid Itokawa regolith - a correlated study by X-ray tomography, micro-raman spectroscopy, and high-sensitivity noble gas analysis
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Busemann, H.SEAES, Univ. of Manchester, UKUNSPECIFIED
Alwmark, C.Dept. of Geology, Lund University Lund, Sweden UNSPECIFIED
Bajt, S.Photon Sci./DESY, Hamburg, GermanyUNSPECIFIED
Böttger, UteUte.Boettger (at) dlr.deUNSPECIFIED
Gilmour, J.D.Open University, Milton Keynes, UKUNSPECIFIED
Heitmann, U.Institute for Planetology, WWU Münster, GermanyUNSPECIFIED
Hübers, Heinz-WilhelmHeinz-Wilhelm.Huebers (at) dlr.deUNSPECIFIED
Meier, M.M.M.Dept. of Geology, Lund University Lund, Sweden UNSPECIFIED
Pavlov, S.G.sergeij.pavlov (at) dlr.deUNSPECIFIED
Schade, U.BESSY, Berlin, GermanyUNSPECIFIED
Spring, N.H.SEAES, Univ. of Manchester, UKUNSPECIFIED
Weber, I.Institute for Planetology, WWU Münster, GermanyUNSPECIFIED
Date:March 2013
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Hayabusa, Asteroid, bobel gas, Raman spectroscopy, Fourier-transform infrared spectroscopy (FTIR), and synchro-tron radiation X-ray tomographic microscopy (SRXTM).
Event Title:44th LPSC
Event Location:USA
Event Type:international Conference
Event Dates:18.-22. Mrz. 2013
Organizer:LPI/USRA
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben Exploration des Sonnensystems
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Experimentelle Planetenphysik
Deposited By: Böttger, Dr.rer.nat. Ute
Deposited On:13 Nov 2013 11:53
Last Modified:31 Jul 2019 19:40

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