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  • LUNAR AND PLANETARY EXPLORATION  (1)
  • SPACE RADIATION  (1)
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  • 1
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    Unknown
    Age of Allan Hills 82102, a meteorite found inside the ice (1989)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The terrestrial age of a meteorite that was recovered from below the surface of Antarctic ice is reported, and it is argued that this represents a measurement of the age of the ice itself. The cosmogenic radionuclides Be-10, C-14, Al-26, Cl-36, and Mn-53 are measured in the meteorite and Be-10 and Cl-36 in the ice. A terrestrial age of 11,000 yr is obtained for the meteorite, which suggests that the snow accumulation area where it fell was only a few tens of km away.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Nature (ISSN 0028-0836); 340; 550-552
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    Cosmic ray records in Antarctic meteorites (1986)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The cosmogenic radionuclides Be(10), Al(26), and Mn(53) and noble gases were determined in more than 28 meteorites from Antarctica by nuclear analytical techniques and static mass spectrometry, respectively. The summarized results are listed. The concentrations of Al(26) and Mn(53) are normalized to the repective main target elements and given in dpm/kg Si sub eq and dpm/kg Fe. The errors stated include statistical as well as systematical errors. For noble gas concentrations estimated errors are 5% and for isotopic ratios 1.5%. Cosmic ray exposure ages T sub 21 were calculated by the noble gas concentrations and the terrestrial residence time (T) on the basis of the spallogenic nuclide Al(26). The suggested pairing of the LL6 chondrite RKPA 80238 and RKPA 80248 and the eucrites ALHA 76005 and ALHA 79017 is confirmed not only by the noble gas data but also by the concentrations of the spallation produced radionuclides. Futhermore, ALHA 80122, clasified as an H6 chondrite, has a noble gas pattern which suggest that this meteorite belongs to the ALHA 80111 shower.
    Keywords: SPACE RADIATION
    Type: Lunar and Planetary Inst. International Workshop on Antarctic Meteorites; p 55-57
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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