Mineralized biosignatures in ALH-77005 Shergottite - Clues to Martian Life?
Abstract The ALH-77005 Martian meteorite was found in Allan Hills on Antarctica during the Japanese National Institute of Polar Research (1977-1978) mission. One thin section sample was studied by optical microscopy for microtexture and by FTIR-ATR microscopy for interpretation of biogenic minerals...
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crdegruyter:10.1515/astro-2019-0002 2023-05-15T14:12:35+02:00 Mineralized biosignatures in ALH-77005 Shergottite - Clues to Martian Life? Gyollai, Ildikó Polgári, Márta Bérczi, Szaniszló Gucsik, Arnold Pál-Molnár, Elemér 2019 http://dx.doi.org/10.1515/astro-2019-0002 http://www.degruyter.com/view/j/astro.2019.28.issue-1/astro-2019-0002/astro-2019-0002.xml https://www.degruyter.com/document/doi/10.1515/astro-2019-0002/xml https://www.degruyter.com/document/doi/10.1515/astro-2019-0002/pdf en eng Walter de Gruyter GmbH http://creativecommons.org/licenses/by/4.0 CC-BY Open Astronomy volume 28, issue 1, page 32-39 ISSN 2543-6376 Space and Planetary Science Astronomy and Astrophysics journal-article 2019 crdegruyter https://doi.org/10.1515/astro-2019-0002 2022-04-14T05:12:13Z Abstract The ALH-77005 Martian meteorite was found in Allan Hills on Antarctica during the Japanese National Institute of Polar Research (1977-1978) mission. One thin section sample was studied by optical microscopy for microtexture and by FTIR-ATR microscopy for interpretation of biogenic minerals and embedded organic materials. The geochemical data (biogenic elements, δ 13 C) of ALH-77005 meteorite from literature implementing recent results were compared to terrestrial geological samples. The ALH-77005 has poikilitic textures with coarse pyroxenes and brown olivines, and with recrystallized melt pocket. The coarse-grained minerals do not contain any alteration along the grain boundaries. Melt pocket and vicinity of opaque minerals contain biogenic signatures as filamentous, coccoidal forms of iron-oxidizing bacteria. The biosignatures were determined by 1) coccoidal, filamentous forms, 2) presence of embedded organic material, 3) presence of biogenic minerals, like ferrihydrite, goethite, and hematite. The other signatures for biogenicity of this meteorite are strong negative δ 13 C, enrichment of Fe, Mn, P, Zn in shock melt support scenario. This study proposes presence of microbial mediation on Mars. Article in Journal/Newspaper Antarc* Antarctica Japanese National Institute of Polar Research National Institute of Polar Research De Gruyter (via Crossref) Allan Hills ENVELOPE(159.667,159.667,-76.717,-76.717) Open Astronomy 28 1 32 39 |
institution |
Open Polar |
collection |
De Gruyter (via Crossref) |
op_collection_id |
crdegruyter |
language |
English |
topic |
Space and Planetary Science Astronomy and Astrophysics |
spellingShingle |
Space and Planetary Science Astronomy and Astrophysics Gyollai, Ildikó Polgári, Márta Bérczi, Szaniszló Gucsik, Arnold Pál-Molnár, Elemér Mineralized biosignatures in ALH-77005 Shergottite - Clues to Martian Life? |
topic_facet |
Space and Planetary Science Astronomy and Astrophysics |
description |
Abstract The ALH-77005 Martian meteorite was found in Allan Hills on Antarctica during the Japanese National Institute of Polar Research (1977-1978) mission. One thin section sample was studied by optical microscopy for microtexture and by FTIR-ATR microscopy for interpretation of biogenic minerals and embedded organic materials. The geochemical data (biogenic elements, δ 13 C) of ALH-77005 meteorite from literature implementing recent results were compared to terrestrial geological samples. The ALH-77005 has poikilitic textures with coarse pyroxenes and brown olivines, and with recrystallized melt pocket. The coarse-grained minerals do not contain any alteration along the grain boundaries. Melt pocket and vicinity of opaque minerals contain biogenic signatures as filamentous, coccoidal forms of iron-oxidizing bacteria. The biosignatures were determined by 1) coccoidal, filamentous forms, 2) presence of embedded organic material, 3) presence of biogenic minerals, like ferrihydrite, goethite, and hematite. The other signatures for biogenicity of this meteorite are strong negative δ 13 C, enrichment of Fe, Mn, P, Zn in shock melt support scenario. This study proposes presence of microbial mediation on Mars. |
format |
Article in Journal/Newspaper |
author |
Gyollai, Ildikó Polgári, Márta Bérczi, Szaniszló Gucsik, Arnold Pál-Molnár, Elemér |
author_facet |
Gyollai, Ildikó Polgári, Márta Bérczi, Szaniszló Gucsik, Arnold Pál-Molnár, Elemér |
author_sort |
Gyollai, Ildikó |
title |
Mineralized biosignatures in ALH-77005 Shergottite - Clues to Martian Life? |
title_short |
Mineralized biosignatures in ALH-77005 Shergottite - Clues to Martian Life? |
title_full |
Mineralized biosignatures in ALH-77005 Shergottite - Clues to Martian Life? |
title_fullStr |
Mineralized biosignatures in ALH-77005 Shergottite - Clues to Martian Life? |
title_full_unstemmed |
Mineralized biosignatures in ALH-77005 Shergottite - Clues to Martian Life? |
title_sort |
mineralized biosignatures in alh-77005 shergottite - clues to martian life? |
publisher |
Walter de Gruyter GmbH |
publishDate |
2019 |
url |
http://dx.doi.org/10.1515/astro-2019-0002 http://www.degruyter.com/view/j/astro.2019.28.issue-1/astro-2019-0002/astro-2019-0002.xml https://www.degruyter.com/document/doi/10.1515/astro-2019-0002/xml https://www.degruyter.com/document/doi/10.1515/astro-2019-0002/pdf |
long_lat |
ENVELOPE(159.667,159.667,-76.717,-76.717) |
geographic |
Allan Hills |
geographic_facet |
Allan Hills |
genre |
Antarc* Antarctica Japanese National Institute of Polar Research National Institute of Polar Research |
genre_facet |
Antarc* Antarctica Japanese National Institute of Polar Research National Institute of Polar Research |
op_source |
Open Astronomy volume 28, issue 1, page 32-39 ISSN 2543-6376 |
op_rights |
http://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1515/astro-2019-0002 |
container_title |
Open Astronomy |
container_volume |
28 |
container_issue |
1 |
container_start_page |
32 |
op_container_end_page |
39 |
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1766284918385541120 |