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    Bhawad LL6 chondrite: Chemistry, petrology, noble gases, nuclear tracks, and cosmogenic radionuclides

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    Author
    Bhandari, N.
    Murty, S. V. S.
    Shukla, P. N.
    Mahajan, R. R.
    Shukla, A. D.
    Suthar, K. M.
    Parthasarathy, G.
    Paliwal, B. S.
    Issue Date
    2005-01-01
    Keywords
    chemistry
    cosmogenic nuclides
    noble gases
    nuclear tracks
    petrology
    
    Metadata
    Show full item record
    Citation
    Bhandari, N., Murty, S. V. S., Shukla, P. N., Mahajan, R. R., Shukla, A. D., Suthar, K. M., ... & Paliwal, B. S. (2005). Bhawad LL6 chondrite: Chemistry, petrology, noble gases, nuclear tracks, and cosmogenic radionuclides. Meteoritics & Planetary Science, 40(7), 1015-1021.
    Publisher
    The Meteoritical Society
    Journal
    Meteoritics & Planetary Science
    URI
    http://hdl.handle.net/10150/656019
    DOI
    10.1111/j.1945-5100.2005.tb00170.x
    Additional Links
    https://meteoritical.org/
    Abstract
    Chemical and mineral analysis of the Bhawad chondrite, which fell in Rajasthan in 2002, suggest that this stone belongs to LL6 group of chondrites. Based on helium, neon, and argon isotopes, it has a cosmic ray exposure age of 16.3 Ma. The track density in the olivines shows a narrow range of 1.7-6.8 106/cm2. The 22Na/26Al ratio of 1.13 is about 25% lower than the solar cycle average value of about 1.5, but is consistent with irradiation of the meteoroid to modulated galactic cosmic ray fluxes as expected for a fall around the solar maximum. The cosmogenic records indicate a pre-atmospheric radius of about 7.5 cm. Based on U/Th-4He and K-40Ar, the gas retention ages are low (about 1.1 Ga), indicating a major thermal event or shock event that lead to the complete loss of radiogenic 4He and 40Ar and the partial loss of radiogenic 129Xe and fission Xe from 244Pu.
    Type
    Article
    text
    Language
    en
    ISSN
    1945-5100
    ae974a485f413a2113503eed53cd6c53
    10.1111/j.1945-5100.2005.tb00170.x
    Scopus Count
    Collections
    Meteoritics & Planetary Science, Volume 40, Number 7 (2005)

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