Biological modification of haematite in Antarctic cryptoendolithic communities
Abstract Detailed FT‐Raman spectra of Antarctic cryptoendolithic colonies in Beacon sandstone have revealed some novel information about the biogeological modification process involving iron(III) mobilization by the organism. The previously unreported but characteristic orange–yellow surface colour...
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crwiley:10.1002/jrs.1171 2024-06-02T07:58:38+00:00 Biological modification of haematite in Antarctic cryptoendolithic communities Edwards, Howell G. M. Wynn‐Williams, David D. Villar, Susana E. Jorge 2004 http://dx.doi.org/10.1002/jrs.1171 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjrs.1171 https://onlinelibrary.wiley.com/doi/full/10.1002/jrs.1171 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Raman Spectroscopy volume 35, issue 6, page 470-474 ISSN 0377-0486 1097-4555 journal-article 2004 crwiley https://doi.org/10.1002/jrs.1171 2024-05-03T10:47:58Z Abstract Detailed FT‐Raman spectra of Antarctic cryptoendolithic colonies in Beacon sandstone have revealed some novel information about the biogeological modification process involving iron(III) mobilization by the organism. The previously unreported but characteristic orange–yellow surface colour of endolithic rock specimens is attributed to the presence of goethite, α‐FeOOH, iron(III) oxide hydroxide, which has been converted from haematite, α‐Fe 2 O 3 , by cyanobacterial modification. Although goethite is also identified in the biological layers, haematite is found unchanged elsewhere in the specimens. No spectroscopic evidence is found for iron(III) complexes of metabolic byproducts such as oxalate or pyruvate. The results are of relevance to remote spectroscopic sensing experiments for Martian planetary surface exploration, where the presence of iron(III) oxide is evident, below which it seems likely that a significant quantity of hydroxyl groups in the form of water could exist. Copyright © 2004 John Wiley & Sons, Ltd. Article in Journal/Newspaper Antarc* Antarctic Wiley Online Library Antarctic Journal of Raman Spectroscopy 35 6 470 474 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Detailed FT‐Raman spectra of Antarctic cryptoendolithic colonies in Beacon sandstone have revealed some novel information about the biogeological modification process involving iron(III) mobilization by the organism. The previously unreported but characteristic orange–yellow surface colour of endolithic rock specimens is attributed to the presence of goethite, α‐FeOOH, iron(III) oxide hydroxide, which has been converted from haematite, α‐Fe 2 O 3 , by cyanobacterial modification. Although goethite is also identified in the biological layers, haematite is found unchanged elsewhere in the specimens. No spectroscopic evidence is found for iron(III) complexes of metabolic byproducts such as oxalate or pyruvate. The results are of relevance to remote spectroscopic sensing experiments for Martian planetary surface exploration, where the presence of iron(III) oxide is evident, below which it seems likely that a significant quantity of hydroxyl groups in the form of water could exist. Copyright © 2004 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Edwards, Howell G. M. Wynn‐Williams, David D. Villar, Susana E. Jorge |
spellingShingle |
Edwards, Howell G. M. Wynn‐Williams, David D. Villar, Susana E. Jorge Biological modification of haematite in Antarctic cryptoendolithic communities |
author_facet |
Edwards, Howell G. M. Wynn‐Williams, David D. Villar, Susana E. Jorge |
author_sort |
Edwards, Howell G. M. |
title |
Biological modification of haematite in Antarctic cryptoendolithic communities |
title_short |
Biological modification of haematite in Antarctic cryptoendolithic communities |
title_full |
Biological modification of haematite in Antarctic cryptoendolithic communities |
title_fullStr |
Biological modification of haematite in Antarctic cryptoendolithic communities |
title_full_unstemmed |
Biological modification of haematite in Antarctic cryptoendolithic communities |
title_sort |
biological modification of haematite in antarctic cryptoendolithic communities |
publisher |
Wiley |
publishDate |
2004 |
url |
http://dx.doi.org/10.1002/jrs.1171 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjrs.1171 https://onlinelibrary.wiley.com/doi/full/10.1002/jrs.1171 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Journal of Raman Spectroscopy volume 35, issue 6, page 470-474 ISSN 0377-0486 1097-4555 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jrs.1171 |
container_title |
Journal of Raman Spectroscopy |
container_volume |
35 |
container_issue |
6 |
container_start_page |
470 |
op_container_end_page |
474 |
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1800742071246520320 |