No iridium anomaly after the 1908 Tunguska impact: Evidence from a Greenland ice core
Abstract— We have determined the abundances of Ir and other elements by neutron activation analysis on annual dust samples from an ice core from Site B in the Crête region in central Greenland covering the years 1905–1914. Iridium was detected in all samples, but we found no excess Ir above the back...
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crwiley:10.1111/j.1945-5100.1995.tb01160.x 2023-12-03T10:23:22+01:00 No iridium anomaly after the 1908 Tunguska impact: Evidence from a Greenland ice core Rasmussen, Kaare L. Clausen, Henrk B. Kallemeyn, Gregory W. 1995 http://dx.doi.org/10.1111/j.1945-5100.1995.tb01160.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1945-5100.1995.tb01160.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1945-5100.1995.tb01160.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Meteoritics volume 30, issue 6, page 634-638 ISSN 0026-1114 General Earth and Planetary Sciences General Environmental Science journal-article 1995 crwiley https://doi.org/10.1111/j.1945-5100.1995.tb01160.x 2023-11-09T13:40:37Z Abstract— We have determined the abundances of Ir and other elements by neutron activation analysis on annual dust samples from an ice core from Site B in the Crête region in central Greenland covering the years 1905–1914. Iridium was detected in all samples, but we found no excess Ir above the background in the years following the Tunguska event. The lack of an Ir anomaly in the years after the Tunguska impact combined with the knowledge of the energy released during the impact and our present knowledge about stratospheric transport implies either a very low Ir content of the impactor or an exceptionally high geocentric velocity for the impactor. Article in Journal/Newspaper Greenland Greenland ice core ice core Wiley Online Library (via Crossref) Greenland Tunguska ENVELOPE(144.784,144.784,59.388,59.388) Meteoritics 30 6 634 638 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
General Earth and Planetary Sciences General Environmental Science |
spellingShingle |
General Earth and Planetary Sciences General Environmental Science Rasmussen, Kaare L. Clausen, Henrk B. Kallemeyn, Gregory W. No iridium anomaly after the 1908 Tunguska impact: Evidence from a Greenland ice core |
topic_facet |
General Earth and Planetary Sciences General Environmental Science |
description |
Abstract— We have determined the abundances of Ir and other elements by neutron activation analysis on annual dust samples from an ice core from Site B in the Crête region in central Greenland covering the years 1905–1914. Iridium was detected in all samples, but we found no excess Ir above the background in the years following the Tunguska event. The lack of an Ir anomaly in the years after the Tunguska impact combined with the knowledge of the energy released during the impact and our present knowledge about stratospheric transport implies either a very low Ir content of the impactor or an exceptionally high geocentric velocity for the impactor. |
format |
Article in Journal/Newspaper |
author |
Rasmussen, Kaare L. Clausen, Henrk B. Kallemeyn, Gregory W. |
author_facet |
Rasmussen, Kaare L. Clausen, Henrk B. Kallemeyn, Gregory W. |
author_sort |
Rasmussen, Kaare L. |
title |
No iridium anomaly after the 1908 Tunguska impact: Evidence from a Greenland ice core |
title_short |
No iridium anomaly after the 1908 Tunguska impact: Evidence from a Greenland ice core |
title_full |
No iridium anomaly after the 1908 Tunguska impact: Evidence from a Greenland ice core |
title_fullStr |
No iridium anomaly after the 1908 Tunguska impact: Evidence from a Greenland ice core |
title_full_unstemmed |
No iridium anomaly after the 1908 Tunguska impact: Evidence from a Greenland ice core |
title_sort |
no iridium anomaly after the 1908 tunguska impact: evidence from a greenland ice core |
publisher |
Wiley |
publishDate |
1995 |
url |
http://dx.doi.org/10.1111/j.1945-5100.1995.tb01160.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1945-5100.1995.tb01160.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1945-5100.1995.tb01160.x |
long_lat |
ENVELOPE(144.784,144.784,59.388,59.388) |
geographic |
Greenland Tunguska |
geographic_facet |
Greenland Tunguska |
genre |
Greenland Greenland ice core ice core |
genre_facet |
Greenland Greenland ice core ice core |
op_source |
Meteoritics volume 30, issue 6, page 634-638 ISSN 0026-1114 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1945-5100.1995.tb01160.x |
container_title |
Meteoritics |
container_volume |
30 |
container_issue |
6 |
container_start_page |
634 |
op_container_end_page |
638 |
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1784271493935398912 |