Atmospheric iridium at the South Pole as a measure of the meteoritic component
The measurement of iridium (Ir) in atmospheric samples is important because it gives information on the short-term flux of extraterrestrial material without interference from fragmentation products from large bodies. Such information cannot be obtained from sediment samples, because sediment samples...
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Springer Science and Business Media LLC
1987
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ftmetuankair:oai:open.metu.edu.tr:11511/51971 2023-05-15T18:21:52+02:00 Atmospheric iridium at the South Pole as a measure of the meteoritic component Zoller, William H. Tuncel, Gurdal 1987-10 https://hdl.handle.net/11511/51971 https://doi.org/10.1038/329703a0 English eng Springer Science and Business Media LLC Nature doi:10.1038/329703a0 705 0028-0836 6141 0023522992 703 https://hdl.handle.net/11511/51971 329 WOS:A1987K503600053 Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ CC-BY-NC-ND Multidisciplinary Journal Article 1987 ftmetuankair https://doi.org/10.1038/329703a0 2020-10-28T15:18:19Z The measurement of iridium (Ir) in atmospheric samples is important because it gives information on the short-term flux of extraterrestrial material without interference from fragmentation products from large bodies. Such information cannot be obtained from sediment samples, because sediment samples integrate over millions of years and include contributions of large bodies impacted in that time period. In addition to flux information, through the analysis of Ir in atmospheric samples we can also evaluate a possible contribution of extraterrestrial material to the unusual enrichment of chalcophilic elements in a remote atmosphere. We present here a determination of average particle-borne Ir concentration in the South Pole atmosphere. The average values of (7.3±3.1)×l0–17g m–3 suggests that the concentration of extraterrestrial material in the South Pole atmosphere is not large enough to explain the enrichments of anomalously enriched elements; however, meteoritic material contributes significantly to the observed concentrations of Co, Fe and Mn. We estimate an accretion rate for background extraterrestrial material of 11,000 tons annually. Publisher's Version Article in Journal/Newspaper South pole OpenMETU (Middle East Technical University) South Pole Nature 329 6141 703 705 |
institution |
Open Polar |
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OpenMETU (Middle East Technical University) |
op_collection_id |
ftmetuankair |
language |
English |
topic |
Multidisciplinary |
spellingShingle |
Multidisciplinary Zoller, William H. Tuncel, Gurdal Atmospheric iridium at the South Pole as a measure of the meteoritic component |
topic_facet |
Multidisciplinary |
description |
The measurement of iridium (Ir) in atmospheric samples is important because it gives information on the short-term flux of extraterrestrial material without interference from fragmentation products from large bodies. Such information cannot be obtained from sediment samples, because sediment samples integrate over millions of years and include contributions of large bodies impacted in that time period. In addition to flux information, through the analysis of Ir in atmospheric samples we can also evaluate a possible contribution of extraterrestrial material to the unusual enrichment of chalcophilic elements in a remote atmosphere. We present here a determination of average particle-borne Ir concentration in the South Pole atmosphere. The average values of (7.3±3.1)×l0–17g m–3 suggests that the concentration of extraterrestrial material in the South Pole atmosphere is not large enough to explain the enrichments of anomalously enriched elements; however, meteoritic material contributes significantly to the observed concentrations of Co, Fe and Mn. We estimate an accretion rate for background extraterrestrial material of 11,000 tons annually. Publisher's Version |
format |
Article in Journal/Newspaper |
author |
Zoller, William H. Tuncel, Gurdal |
author_facet |
Zoller, William H. Tuncel, Gurdal |
author_sort |
Zoller, William H. |
title |
Atmospheric iridium at the South Pole as a measure of the meteoritic component |
title_short |
Atmospheric iridium at the South Pole as a measure of the meteoritic component |
title_full |
Atmospheric iridium at the South Pole as a measure of the meteoritic component |
title_fullStr |
Atmospheric iridium at the South Pole as a measure of the meteoritic component |
title_full_unstemmed |
Atmospheric iridium at the South Pole as a measure of the meteoritic component |
title_sort |
atmospheric iridium at the south pole as a measure of the meteoritic component |
publisher |
Springer Science and Business Media LLC |
publishDate |
1987 |
url |
https://hdl.handle.net/11511/51971 https://doi.org/10.1038/329703a0 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
doi:10.1038/329703a0 705 0028-0836 6141 0023522992 703 https://hdl.handle.net/11511/51971 329 WOS:A1987K503600053 |
op_rights |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1038/329703a0 |
container_title |
Nature |
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329 |
container_issue |
6141 |
container_start_page |
703 |
op_container_end_page |
705 |
_version_ |
1766201196875350016 |