Characterisation, Sources and Flux of Unmelted Micrometeorites on Earth During the Last ~50,000 Years

Dust dominates extraterrestrial flux on the earth (30,000 tonnes/yr), however only ~5% of the cosmic dust survives atmospheric entry which is basically in two forms: melted and unmelted. Melted micrometeorites undergo transformational changes due to heating during atmospheric entry which obliterate...

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Autores principales: Prasad, M. Shyam, Rudraswami, N. G., de Araujo, Agnelo Alexandre, Khedekar, V. D.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5995856/
https://www.ncbi.nlm.nih.gov/pubmed/29891909
http://dx.doi.org/10.1038/s41598-018-27158-x
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author Prasad, M. Shyam
Rudraswami, N. G.
de Araujo, Agnelo Alexandre
Khedekar, V. D.
author_facet Prasad, M. Shyam
Rudraswami, N. G.
de Araujo, Agnelo Alexandre
Khedekar, V. D.
author_sort Prasad, M. Shyam
collection PubMed
description Dust dominates extraterrestrial flux on the earth (30,000 tonnes/yr), however only ~5% of the cosmic dust survives atmospheric entry which is basically in two forms: melted and unmelted. Melted micrometeorites undergo transformational changes due to heating during atmospheric entry which obliterate evidences regarding their precursors. Unmelted micrometeorites (UMM) survive atmospheric entry with minimal alteration, they provide direct evidence for their parent bodies. Recent investigations unravelled a wide range of UMM, there are however no quantitative estimates of sources that contribute to the cosmic dust accreted by the Earth.
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spelling pubmed-59958562018-06-21 Characterisation, Sources and Flux of Unmelted Micrometeorites on Earth During the Last ~50,000 Years Prasad, M. Shyam Rudraswami, N. G. de Araujo, Agnelo Alexandre Khedekar, V. D. Sci Rep Article Dust dominates extraterrestrial flux on the earth (30,000 tonnes/yr), however only ~5% of the cosmic dust survives atmospheric entry which is basically in two forms: melted and unmelted. Melted micrometeorites undergo transformational changes due to heating during atmospheric entry which obliterate evidences regarding their precursors. Unmelted micrometeorites (UMM) survive atmospheric entry with minimal alteration, they provide direct evidence for their parent bodies. Recent investigations unravelled a wide range of UMM, there are however no quantitative estimates of sources that contribute to the cosmic dust accreted by the Earth. Nature Publishing Group UK 2018-06-11 /pmc/articles/PMC5995856/ /pubmed/29891909 http://dx.doi.org/10.1038/s41598-018-27158-x Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Prasad, M. Shyam
Rudraswami, N. G.
de Araujo, Agnelo Alexandre
Khedekar, V. D.
Characterisation, Sources and Flux of Unmelted Micrometeorites on Earth During the Last ~50,000 Years
title Characterisation, Sources and Flux of Unmelted Micrometeorites on Earth During the Last ~50,000 Years
title_full Characterisation, Sources and Flux of Unmelted Micrometeorites on Earth During the Last ~50,000 Years
title_fullStr Characterisation, Sources and Flux of Unmelted Micrometeorites on Earth During the Last ~50,000 Years
title_full_unstemmed Characterisation, Sources and Flux of Unmelted Micrometeorites on Earth During the Last ~50,000 Years
title_short Characterisation, Sources and Flux of Unmelted Micrometeorites on Earth During the Last ~50,000 Years
title_sort characterisation, sources and flux of unmelted micrometeorites on earth during the last ~50,000 years
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5995856/
https://www.ncbi.nlm.nih.gov/pubmed/29891909
http://dx.doi.org/10.1038/s41598-018-27158-x
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