Cometary micrometeorites and input of prebiotic compounds
The apparition of life on the early Earth was probably favored by inputs of extraterrestrial matter brought by carbonaceous chondrite-like objects or cometary material. Interplanetary dust collected nowadays on Earth is related to carbonaceous chondrites and to cometary material. They contain in par...
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ftdoajarticles:oai:doaj.org/article:e81a454b755349958e8905b0f52a06dd 2023-05-15T14:00:34+02:00 Cometary micrometeorites and input of prebiotic compounds Engrand C. 2014-02-01T00:00:00Z https://doi.org/10.1051/bioconf/20140203003 https://doaj.org/article/e81a454b755349958e8905b0f52a06dd EN FR eng fre EDP Sciences http://dx.doi.org/10.1051/bioconf/20140203003 https://doaj.org/toc/2117-4458 2117-4458 doi:10.1051/bioconf/20140203003 https://doaj.org/article/e81a454b755349958e8905b0f52a06dd BIO Web of Conferences, Vol 2, p 03003 (2014) Microbiology QR1-502 Physiology QP1-981 Zoology QL1-991 article 2014 ftdoajarticles https://doi.org/10.1051/bioconf/20140203003 2022-12-31T14:34:46Z The apparition of life on the early Earth was probably favored by inputs of extraterrestrial matter brought by carbonaceous chondrite-like objects or cometary material. Interplanetary dust collected nowadays on Earth is related to carbonaceous chondrites and to cometary material. They contain in particular at least a few percent of organic matter, organic compounds (amino-acids, PAHs,…), hydrous silicates, and could have largely contributed to the budget of prebiotic matter on Earth, about 4 Ga ago. A new population of cometary dust was recently discovered in the Concordia Antarctic micrometeorite collection. These “Ultracarbonaceous Antarctic Micrometeorites” (UCAMMs) are dominated by deuterium-rich and nitrogen-rich organic matter. They seem related to the “CHON” grains identified in the comet Halley in 1986. Although rare in the micrometeorites flux (<5% of the micrometeorites), UCAMMs could have significantly contributed to the input of prebiotic matter. Their content in soluble organic matter is currently under study. Article in Journal/Newspaper Antarc* Antarctic Directory of Open Access Journals: DOAJ Articles Antarctic BIO Web of Conferences 2 03003 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English French |
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Microbiology QR1-502 Physiology QP1-981 Zoology QL1-991 |
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Microbiology QR1-502 Physiology QP1-981 Zoology QL1-991 Engrand C. Cometary micrometeorites and input of prebiotic compounds |
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Microbiology QR1-502 Physiology QP1-981 Zoology QL1-991 |
description |
The apparition of life on the early Earth was probably favored by inputs of extraterrestrial matter brought by carbonaceous chondrite-like objects or cometary material. Interplanetary dust collected nowadays on Earth is related to carbonaceous chondrites and to cometary material. They contain in particular at least a few percent of organic matter, organic compounds (amino-acids, PAHs,…), hydrous silicates, and could have largely contributed to the budget of prebiotic matter on Earth, about 4 Ga ago. A new population of cometary dust was recently discovered in the Concordia Antarctic micrometeorite collection. These “Ultracarbonaceous Antarctic Micrometeorites” (UCAMMs) are dominated by deuterium-rich and nitrogen-rich organic matter. They seem related to the “CHON” grains identified in the comet Halley in 1986. Although rare in the micrometeorites flux (<5% of the micrometeorites), UCAMMs could have significantly contributed to the input of prebiotic matter. Their content in soluble organic matter is currently under study. |
format |
Article in Journal/Newspaper |
author |
Engrand C. |
author_facet |
Engrand C. |
author_sort |
Engrand C. |
title |
Cometary micrometeorites and input of prebiotic compounds |
title_short |
Cometary micrometeorites and input of prebiotic compounds |
title_full |
Cometary micrometeorites and input of prebiotic compounds |
title_fullStr |
Cometary micrometeorites and input of prebiotic compounds |
title_full_unstemmed |
Cometary micrometeorites and input of prebiotic compounds |
title_sort |
cometary micrometeorites and input of prebiotic compounds |
publisher |
EDP Sciences |
publishDate |
2014 |
url |
https://doi.org/10.1051/bioconf/20140203003 https://doaj.org/article/e81a454b755349958e8905b0f52a06dd |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
BIO Web of Conferences, Vol 2, p 03003 (2014) |
op_relation |
http://dx.doi.org/10.1051/bioconf/20140203003 https://doaj.org/toc/2117-4458 2117-4458 doi:10.1051/bioconf/20140203003 https://doaj.org/article/e81a454b755349958e8905b0f52a06dd |
op_doi |
https://doi.org/10.1051/bioconf/20140203003 |
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BIO Web of Conferences |
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2 |
container_start_page |
03003 |
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1766269735384645632 |