Academic Journal
Metabolically diverse primordial microbial communities in Earth’s oldest seafloor-hydrothermal jasper
| العنوان: | Metabolically diverse primordial microbial communities in Earth’s oldest seafloor-hydrothermal jasper |
|---|---|
| المؤلفون: | Papineau, D, She, Z, Dodd, MS, Iacoviello, F, Slack, JF, Hauri, E, Shearing, P, Little, C |
| بيانات النشر: | American Association for the Advancement of Science |
| سنة النشر: | 2022 |
| المجموعة: | White Rose Research Online (Universities of Leeds, Sheffield & York) |
| الوصف: | The oldest putative fossils occur as hematite filaments and tubes in jasper-carbonate banded iron formations from the 4280- to 3750-Ma Nuvvuagittuq Supracrustal Belt, Québec. If biological in origin, these filaments might have affinities with modern descendants; however, if abiotic, they could indicate complex prebiotic forms on early Earth. Here, we report images of centimeter-size, autochthonous hematite filaments that are pectinate-branching, parallel-aligned, undulated, and containing Fe2+-oxides. These microstructures are considered microfossils because of their mineral associations and resemblance to younger microfossils, modern Fe-bacteria from hydrothermal environments, and the experimental products of heated Fe-oxidizing bacteria. Additional clusters of irregular hematite ellipsoids could reflect abiotic processes of silicification, producing similar structures and thus yielding an uncertain origin. Millimeter-sized chalcopyrite grains within the jasper-carbonate rocks have 34S- and 33S-enrichments consistent with microbial S-disproportionation and an O2-poor atmosphere. Collectively, the observations suggest a diverse microbial ecosystem on the primordial Earth that may be common on other planetary bodies, including Mars. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | text |
| اللغة: | English |
| Relation: | https://eprints.whiterose.ac.uk/185602/1/Papineau_et_al_2022_SciAdv_NSB_microbes_jasper.pdf; Papineau, D, She, Z, Dodd, MS et al. (5 more authors) (2022) Metabolically diverse primordial microbial communities in Earth’s oldest seafloor-hydrothermal jasper. Science Advances, 8 (15). eabm2296. ISSN 2375-2548 |
| الاتاحة: | https://eprints.whiterose.ac.uk/185602/ https://eprints.whiterose.ac.uk/185602/1/Papineau_et_al_2022_SciAdv_NSB_microbes_jasper.pdf |
| Rights: | cc_by_nc_4 |
| رقم الانضمام: | edsbas.C94F3481 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |