3He, 20,21,22Ne, 14C, 10Be, 26Al, and 36Cl in magnetic fractions of cosmic dust from Greenland and Antarctica

A. J.T. Jull, D. Lal, S. Taylor, R. Wieler, A. Grimberg, L. Vacher, L. R. McHargue, S. P.H.T. Freeman, C. Maden, C. Schnabel, S. Xu, R. C. Finkel, K. J. Kim, K. Marti

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

We report on studies of the concentrations of cosmogenic nuclides in the magnetic fraction of cosmic dust particles recovered from the South Pole Water Well (SPWW) and from Greenland. Our results confirm that cosmic dust material from these locations contains measurable amounts of cosmogenic nuclides.The Antarctic particles (and possibly those from Greenland as well) also contain minor amounts of solar Ne. Concentrations of cosmogenic nuclides are consistent with irradiation of this material as small objects in space, with exposure ages similar to the expected Poynting-Robertson (P-R) lifetimes of 50-200 kyr for particles 25-100 μm in size.

Original languageEnglish (US)
Pages (from-to)1831-1840
Number of pages10
JournalMeteoritics and Planetary Science
Volume42
Issue number10
DOIs
StatePublished - Oct 2007

ASJC Scopus subject areas

  • Geophysics
  • Space and Planetary Science

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