Meteoric smoke fallout over the Holocene epoch revealed by iridium and platinum in Greenland ice

  title={Meteoric smoke fallout over the Holocene epoch revealed by iridium and platinum in Greenland ice},
  author={Paolo Gabrielli and C. Barbante and John M C Plane and Anita Varga and Sungmin Hong and Giulio Cozzi and V. Gaspari and Fr{\'e}d{\'e}ric A. M. Planchon and Warren R L Cairns and Christophe P. Ferrari and Paul J. Crutzen and P. Cescon and Claude F. Boutron},
An iridium anomaly at the Cretaceous/Tertiary boundary layer has been attributed to an extraterrestrial body that struck the Earth some 65 million years ago. It has been suggested that, during this event, the carrier of iridium was probably a micrometre-sized silicate-enclosed aggregate or the nanophase material of the vaporized impactor. But the fate of platinum-group elements (such as iridium) that regularly enter the atmosphere via ablating meteoroids remains largely unknown. Here we report… CONTINUE READING
Highly Cited
This paper has 41 citations. REVIEW CITATIONS

From This Paper

Figures, tables, and topics from this paper.
23 Citations
50 References
Similar Papers


Publications citing this paper.
Showing 1-10 of 23 extracted citations


Publications referenced by this paper.
Showing 1-10 of 50 references

Determination of Ir and Pt down to the sub - femtogram per gram level in polar ice by ICP - SFMS using preconcentration and a desolvation system

  • P. Gabrielli
  • J . Anal . At . Spectrom .
  • 2004

Climate - related variations in lead concentrations and sources in Vostok Antarctic ice from 65 , 000 to 240 , 000 years BP

  • S. Hong
  • Geophys . Res . Lett .
  • 2003

Extraterrestrial accretion from the GISP 2 ice core

  • D. B. Karner
  • Geochim . Cosmochim . Acta
  • 2003

On the correlation between grain - boundary segregation , faceting and embrittlement in Bi - doped Cu

  • W. Sigle, L.-S. Chang, W. Gust
  • Phil . Mag . A
  • 2002

Oxygen isotope and palaeotemperature records from six Greenland ice - core stations : Camp Century , Dye - 3 , GRIP , GISP 2 , Renland and NorthGRIP

  • S. J. Johnsen
  • Quat . Sci .
  • 2001

Presence of an iron - rich nanophase material in the upper layer of the Cretaceous - Tertiary boundary clay

  • T. J. Wdowiak
  • Meteorit . Planet . Sci .
  • 2001

The micrometeoroid mass flux into the upper atmosphere : Arecibo results and a comparison with prior estimates

  • J. D. Mathews, D. Janches, D. D. Meisel, Q. H. Zhou
  • Geophys . Res . Lett .
  • 2001

Similar Papers

Loading similar papers…