Nannobacterial alteration of pyroxenes in martian meteorite Allan Hills 84001
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...
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ftunivarizonaojs:oai:journals.uair.arizona.edu:article/14635 2023-05-15T13:42:28+02:00 Nannobacterial alteration of pyroxenes in martian meteorite Allan Hills 84001 Folk, Robert L. Taylor, Lawrence A. 2002-01-01 application/pdf https://journals.uair.arizona.edu/index.php/maps/article/view/14635 eng eng Meteoritics & Planetary Science Archives https://journals.uair.arizona.edu/index.php/maps/article/view/14635/14607 https://journals.uair.arizona.edu/index.php/maps/article/view/14635 Meteoritics & Planetary Science Archives; Vol 37, No 8 (2002); 1057-1069 1945-5100 1086-9379 Allan Hills (ALH) 84001;martian meteorite;nanobides;nannobacteria;Mars;Antarctic;scanning electron microscope;ferromagnesian minerals info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 2002 ftunivarizonaojs 2020-11-14T17:53:01Z 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 Journals at the University of Arizona Allan Hills ENVELOPE(159.667,159.667,-76.717,-76.717) Antarctic |
institution |
Open Polar |
collection |
Journals at the University of Arizona |
op_collection_id |
ftunivarizonaojs |
language |
English |
topic |
Allan Hills (ALH) 84001;martian meteorite;nanobides;nannobacteria;Mars;Antarctic;scanning electron microscope;ferromagnesian minerals |
spellingShingle |
Allan Hills (ALH) 84001;martian meteorite;nanobides;nannobacteria;Mars;Antarctic;scanning electron microscope;ferromagnesian minerals Folk, Robert L. Taylor, Lawrence A. Nannobacterial alteration of pyroxenes in martian meteorite Allan Hills 84001 |
topic_facet |
Allan Hills (ALH) 84001;martian meteorite;nanobides;nannobacteria;Mars;Antarctic;scanning electron microscope;ferromagnesian minerals |
description |
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. |
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 |
Meteoritics & Planetary Science Archives |
publishDate |
2002 |
url |
https://journals.uair.arizona.edu/index.php/maps/article/view/14635 |
long_lat |
ENVELOPE(159.667,159.667,-76.717,-76.717) |
geographic |
Allan Hills Antarctic |
geographic_facet |
Allan Hills Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Meteoritics & Planetary Science Archives; Vol 37, No 8 (2002); 1057-1069 1945-5100 1086-9379 |
op_relation |
https://journals.uair.arizona.edu/index.php/maps/article/view/14635/14607 https://journals.uair.arizona.edu/index.php/maps/article/view/14635 |
_version_ |
1766168175918972928 |