4:30 PM - 4:45 PM
[PCG30-12] Novel analytical/transportation system of extraterrestrial materials: Are we ready for Hayabusa 2 returned sample?
Keywords:Hayabusa 2, Extraterrestrial organics, Micro analysis
The Hayabusa 2 returned sample might be sensitive to terrestrial contamination during curation, transportation, preparation and analysis. Several reports mentioned that the Hayabusa sample contained carbon-rich particles, inorganic particles, metals and organic materials as terrestrial contaminants (e.g., Uesugi et al., 2014; Ito et al., 2014; Yabuta et al., 2014; Yada et al., 2014). Therefore, it requires to avoid contaminations to the Hayabusa 2 sample from any environmental conditions, to identify possible contaminants if any, and to prepare the proper curation and analytical flow/system in a few years. Uesugi et al. (2014) reported an optimized sample-handling system including transportation between institutes and the sequence of the analytical flow through the examination of Hayabusa category 3 organic materials and meteoritic samples as analogues of Hayabusa 2 returned sample.
JAXA Extraterrestrial Sample Curation Center is taking a lead to work on above problems of unexposed sample transportation, a coordinated analytical system including micro-Raman spectroscopy, FT-IR, XANES, ToF-SIMS, focused ion beam (FIB), transmission electron microscopy/scanning transmission electron microscopy (TEM/STEM) and NanoSIMS. This coordinated analysis is essential to acquire maximum information including abundances of major/trace elements and isotopes, characterization of organics, and petrographic textures from nanometer- to micrometer-scale samples. This technique has been applied to carbonaceous materials by Stardust cometary dust return mission (e.g., Sandford et al. 2006; Matrajt et al. 2008), and can be used for samples obtained by future missions such as Hayabusa 2 and Osiris-REX.
In this talk we will discuss about detailed analytical and comprehensive system for small samples, and future developments of curation, transportation and analysis under air-isolated and/or cryo condition.