Geochemical constraints on the Hadean environment from mineral fingerprints of prokaryotes
The environmental conditions on the Earth before 4 billion years ago are highly uncertain, largely because of the lack of a substantial rock record from this period. During this time interval, known as the Hadean, the young planet transformed from an uninhabited world to the one capable of supportin...
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20452322_v7_n1_p_Novoselov http://hdl.handle.net/20.500.12110/paper_20452322_v7_n1_p_Novoselov |
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paper:paper_20452322_v7_n1_p_Novoselov2023-06-08T16:33:31Z Geochemical constraints on the Hadean environment from mineral fingerprints of prokaryotes Abrevaya, Ximena Celeste mineral silicate archaeon astronomy bacterium chemistry clay climate environment prokaryotic cell Archaea Bacteria Clay Climate Earth (Planet) Environment Minerals Prokaryotic Cells Silicates The environmental conditions on the Earth before 4 billion years ago are highly uncertain, largely because of the lack of a substantial rock record from this period. During this time interval, known as the Hadean, the young planet transformed from an uninhabited world to the one capable of supporting, and inhabited by the first living cells. These cells formed in a fluid environment they could not at first control, with homeostatic mechanisms developing only later. It is therefore possible that present-day organisms retain some record of the primordial fluid in which the first cells formed. Here we present new data on the elemental compositions and mineral fingerprints of both Bacteria and Archaea, using these data to constrain the environment in which life formed. The cradle solution that produced this elemental signature was saturated in barite, sphene, chalcedony, apatite, and clay minerals. The presence of these minerals, as well as other chemical features, suggests that the cradle environment of life may have been a weathering fluid interacting with dry-land silicate rocks. The specific mineral assemblage provides evidence for a moderate Hadean climate with dry and wet seasons and a lower atmospheric abundance of CO2 than is present today. © 2017 The Author(s). Fil:Abrevaya, X.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20452322_v7_n1_p_Novoselov http://hdl.handle.net/20.500.12110/paper_20452322_v7_n1_p_Novoselov |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
mineral silicate archaeon astronomy bacterium chemistry clay climate environment prokaryotic cell Archaea Bacteria Clay Climate Earth (Planet) Environment Minerals Prokaryotic Cells Silicates |
| spellingShingle |
mineral silicate archaeon astronomy bacterium chemistry clay climate environment prokaryotic cell Archaea Bacteria Clay Climate Earth (Planet) Environment Minerals Prokaryotic Cells Silicates Abrevaya, Ximena Celeste Geochemical constraints on the Hadean environment from mineral fingerprints of prokaryotes |
| topic_facet |
mineral silicate archaeon astronomy bacterium chemistry clay climate environment prokaryotic cell Archaea Bacteria Clay Climate Earth (Planet) Environment Minerals Prokaryotic Cells Silicates |
| description |
The environmental conditions on the Earth before 4 billion years ago are highly uncertain, largely because of the lack of a substantial rock record from this period. During this time interval, known as the Hadean, the young planet transformed from an uninhabited world to the one capable of supporting, and inhabited by the first living cells. These cells formed in a fluid environment they could not at first control, with homeostatic mechanisms developing only later. It is therefore possible that present-day organisms retain some record of the primordial fluid in which the first cells formed. Here we present new data on the elemental compositions and mineral fingerprints of both Bacteria and Archaea, using these data to constrain the environment in which life formed. The cradle solution that produced this elemental signature was saturated in barite, sphene, chalcedony, apatite, and clay minerals. The presence of these minerals, as well as other chemical features, suggests that the cradle environment of life may have been a weathering fluid interacting with dry-land silicate rocks. The specific mineral assemblage provides evidence for a moderate Hadean climate with dry and wet seasons and a lower atmospheric abundance of CO2 than is present today. © 2017 The Author(s). |
| author |
Abrevaya, Ximena Celeste |
| author_facet |
Abrevaya, Ximena Celeste |
| author_sort |
Abrevaya, Ximena Celeste |
| title |
Geochemical constraints on the Hadean environment from mineral fingerprints of prokaryotes |
| title_short |
Geochemical constraints on the Hadean environment from mineral fingerprints of prokaryotes |
| title_full |
Geochemical constraints on the Hadean environment from mineral fingerprints of prokaryotes |
| title_fullStr |
Geochemical constraints on the Hadean environment from mineral fingerprints of prokaryotes |
| title_full_unstemmed |
Geochemical constraints on the Hadean environment from mineral fingerprints of prokaryotes |
| title_sort |
geochemical constraints on the hadean environment from mineral fingerprints of prokaryotes |
| publishDate |
2017 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20452322_v7_n1_p_Novoselov http://hdl.handle.net/20.500.12110/paper_20452322_v7_n1_p_Novoselov |
| work_keys_str_mv |
AT abrevayaximenaceleste geochemicalconstraintsonthehadeanenvironmentfrommineralfingerprintsofprokaryotes |
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1768544014565376000 |