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Elemental depletions in Antarctic micrometeorites and Arctic cosmic spherules: Comparison and relationshipsAntarctic micrometeorites (MM's) and Arctic cosmic spherules (CS's) have bulk compositions comparable to those of chondritic meteorites. However, abundance of Na, Ca, Mn, Ni, Co, and S are commonly lower in MM's and CS's as compared to chondrites. Our SEM, EMP, and INAA studies suggest that these elemental depletions in unmelted MM's are likely to be due to leaching of soluble components from the MM's in the upper atmosphere and the melt ice water. Depletions in CS's appear to be mainly due to volatilization during melting in the atmosphere or to sampling bias during aggregate formation or parent rock break-up.
Document ID
19940016231
Document Type
Conference Paper
Authors
Presper, T. (Naturhistorisches Museum Vienna, Austria)
Kurat, G. (Naturhistorisches Museum Vienna, Austria)
Koeberl, C. (Wien Univ. Austria)
Palme, H. (Max-Planck-Inst. fuer Chemie Mainz, Germany)
Maurette, Michel (Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse Orsay, France)
Date Acquired
September 6, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 3: N-Z
Subject Category
ASTROPHYSICS
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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