Nannobacterial alteration of pyroxenes in martian meteorite Allan Hills 84001
Abstract— In martian meteorite Allan Hills (ALH) 84001, this scanning electron microscope study was focused on the ferromagnesian minerals, which are extensively covered with nanometer‐size bodies mainly 30–100 nm in diameter. These bodies range from spheres to ovoids to caterpillar shapes and resem...
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crwiley:10.1111/j.1945-5100.2002.tb00877.x 2024-09-15T17:43:54+00:00 Nannobacterial alteration of pyroxenes in martian meteorite Allan Hills 84001 Folk, Robert L. Taylor, Lawrence A. 2002 http://dx.doi.org/10.1111/j.1945-5100.2002.tb00877.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1945-5100.2002.tb00877.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1945-5100.2002.tb00877.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Meteoritics & Planetary Science volume 37, issue 8, page 1057-1069 ISSN 1086-9379 1945-5100 journal-article 2002 crwiley https://doi.org/10.1111/j.1945-5100.2002.tb00877.x 2024-08-27T04:28:01Z Abstract— In martian meteorite Allan Hills (ALH) 84001, this scanning electron microscope study was focused on the ferromagnesian minerals, which are extensively covered with nanometer‐size bodies mainly 30–100 nm in diameter. These bodies range from spheres to ovoids to caterpillar shapes and resemble, both in size and shape, nannobacteria that attack weathered rocks on Earth and that can be cultured. Dense colonies alternate with clean, smooth cleavage surfaces, possibly formed later. Statistical study shows that the distribution of presumed nannobacteria is very clustered. In addition to the small bodies, there are a few occurrences of ellipsoidal 200–400 nm objects, that are within the lower size range of “normal” earthly bacteria. We conclude that the nanobodies so abundant in ALH 84001 are indeed nannobacteria, confirming the initial assertion of McKay et al. (1996). However, whether these bodies originated on Mars or are Antarctic contamination remains a valid question. Article in Journal/Newspaper Antarc* Antarctic Wiley Online Library Meteoritics & Planetary Science 37 8 1057 1069 |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract— In martian meteorite Allan Hills (ALH) 84001, this scanning electron microscope study was focused on the ferromagnesian minerals, which are extensively covered with nanometer‐size bodies mainly 30–100 nm in diameter. These bodies range from spheres to ovoids to caterpillar shapes and resemble, both in size and shape, nannobacteria that attack weathered rocks on Earth and that can be cultured. Dense colonies alternate with clean, smooth cleavage surfaces, possibly formed later. Statistical study shows that the distribution of presumed nannobacteria is very clustered. In addition to the small bodies, there are a few occurrences of ellipsoidal 200–400 nm objects, that are within the lower size range of “normal” earthly bacteria. We conclude that the nanobodies so abundant in ALH 84001 are indeed nannobacteria, confirming the initial assertion of McKay et al. (1996). However, whether these bodies originated on Mars or are Antarctic contamination remains a valid question. |
format |
Article in Journal/Newspaper |
author |
Folk, Robert L. Taylor, Lawrence A. |
spellingShingle |
Folk, Robert L. Taylor, Lawrence A. Nannobacterial alteration of pyroxenes in martian meteorite Allan Hills 84001 |
author_facet |
Folk, Robert L. Taylor, Lawrence A. |
author_sort |
Folk, Robert L. |
title |
Nannobacterial alteration of pyroxenes in martian meteorite Allan Hills 84001 |
title_short |
Nannobacterial alteration of pyroxenes in martian meteorite Allan Hills 84001 |
title_full |
Nannobacterial alteration of pyroxenes in martian meteorite Allan Hills 84001 |
title_fullStr |
Nannobacterial alteration of pyroxenes in martian meteorite Allan Hills 84001 |
title_full_unstemmed |
Nannobacterial alteration of pyroxenes in martian meteorite Allan Hills 84001 |
title_sort |
nannobacterial alteration of pyroxenes in martian meteorite allan hills 84001 |
publisher |
Wiley |
publishDate |
2002 |
url |
http://dx.doi.org/10.1111/j.1945-5100.2002.tb00877.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1945-5100.2002.tb00877.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1945-5100.2002.tb00877.x |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Meteoritics & Planetary Science volume 37, issue 8, page 1057-1069 ISSN 1086-9379 1945-5100 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1945-5100.2002.tb00877.x |
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Meteoritics & Planetary Science |
container_volume |
37 |
container_issue |
8 |
container_start_page |
1057 |
op_container_end_page |
1069 |
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1810491114744971264 |