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Antarctic Research Series

 

Keywords

  • Antartic regions

Index Terms

  • 3675 Mineralogy, Petrology, and Rock Chemistry: Sedimentary petrology
  • 1827 Hydrology: Glaciology
  • 6015 Planetology: Comets and Small Bodies: Dust
  • 9310 Information Related to Geographic Region: Antarctica

Article

ANTARCTIC RESEARCH SERIES, VOL. 50, PP. 19-24, 1990

Extraterrestrial spherules in glacial sediment, Beardmore glacier area, Transantarctic Mountains

E. H. Hagen, C. Koeberl, and G. Faure

Several hundred spherules have been recovered from the 125- to 500-μm size fractions of sediment deposited by the East Antarctic ice sheet in the Transantarctic Mountains near the Beardmore Glacier. They are glassy in appearance with smooth, unetched surfaces, but many contain crystals of olivine and magnetite. Their abundances in the 125- to 500-μm size fractions of bulk sediment vary from less than one to more than 4000 spherules/100 g of sediment. The abundance of spherules decreases with increasing grain size as observed previously in spherules recovered from Antarctic ice and from meltwater pools on the Greenland ice sheet. The major and trace element concentrations of the newly discovered spherules from Antarctica support their extraterrestrial origin.

Citation: Hagen, E. H., C. Koeberl, and G. Faure (1990), Extraterrestrial spherules in glacial sediment, Beardmore glacier area, Transantarctic Mountains, in Contributions to Antarctic Research I, Antarct. Res. Ser., vol. 50, edited by Anonymous, pp. 19–24, AGU, Washington, D. C., doi:10.1029/AR050p0019.

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