Formation of mineral phosphate microtubes in the presence of halophilic cyanobacteriumMicrocoleus chthonoplastes

Goncharova, I. V.; Герасименко, Л. М.; Zavarzin, G. A.; Ushatinskaya, G. T.

doi:10.1007/bf01692874

Cited by 4 publications

(3 citation statements)

References 4 publications

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“…Authigenesis of minerals including carbonates, sulfides, and phosphates is often associated with phototrophic bacterial activity (Goncharova et al, 1993;Zavarzin, 1994;Reid et al, 2000;Stolz, 2000). The presence of microbial mats and microorganisms associated with barite and calcite minerals in Zodletone spring lead us to hypothesize that bacterial activity was responsible for the oxidation of sulfide to sulfate and subsequent deposition of barite.…”

Section: Discussionmentioning

confidence: 97%

Barite deposition resulting from phototrophic sulfide-oxidizing bacterial activity

Senko¹,

Campbell²,

Henriksen³

et al. 2004

Geochimica et Cosmochimica Acta

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Section: Discussionmentioning

confidence: 97%

Barite deposition resulting from phototrophic sulfide-oxidizing bacterial activity

Senko¹,

Campbell²,

Henriksen³

et al. 2004

Geochimica et Cosmochimica Acta

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“…1.3, 1.4). These filaments are comparable to cyanobacterial sheaths (e.g., Goncharova et al, 1993). It is most probable that this phosphatic veneer is a cast of the originally organic periostracum, phosphatised secondarily by bacterial activity.…”

Section: Shell Morphologymentioning

confidence: 84%

Ordovician–Silurian Chileida—First Post-Cambrian Records of an Enigmatic Group of Brachiopoda

2014

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Brachiopods of the order Chileida have been recorded previously only from rocks of early to mid-Cambrian age (Botomian–Amgaian). They are typified by having a calcareous strophic shell with a delthyrium and colleplax, and these characters are shown to be present in species of the two new generaTolenandTrifissura, from the Late Ordovician of Kazakhstan and the Silurian of Sweden and Britain, respectively. In specimens ofTrifissura, the triangular colleplax is phosphatized secondarily by bacterial activity. It is suggested that the phosphatized colleplax represents an organic pad and that served as the original attachment structure ofTrifissuraby encrustation.TolenandTrifissurarepresent the first post-Cambrian record of chileides from the Ordovician and Silurian; the new family Trifissuridae forms the first phylogenetic link between Cambrian chileides and Carboniferous–Permian isogrammides.

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“…[5][6][7][8][9][10][11][12][13][14][15] The peculiarity of the study of recent phosphorites was that: 1) they were under investigation using Scanning Electron Microscopes with Microprobe analysis in considerable (mass) quantity; 2) all samples were treated with acids for 30-60 seconds, and then washed and dried. This was done in order to receive a surface relief of the samples that appears due to the great difference in the solubility of the carbonates, phosphates and siliceous components, as well as the organic-mineral complexes.…”

mentioning

confidence: 99%

Early Proterozoic (2.04 GA) phosphorites of Pechenga Greenstone Belt and their origin

Rozanov

Astafieva

Hoover

2007

Instruments, Methods, and Missions for Astrobiology X

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No principal differences have been found between microfossils described from Cambrian and Phanerozoic and the 2000 Ma phosphorites. Numerous samples revealed diverse microbial microstructures interpreted as cyanobacterial mats consisting of filamentous (1-3 µm in diameter, 20 µm in length), coccoidal (0.8-1.0 µm) and ellipsoidal or rod-shaped microfossils (0.8 µm in diameter, around 2 µm in length) which morphologically resemble modern Microcoleus and Siphonophycus, Thiocapsa, and Rhabdoderma, respectively, reported from alkaline or saline environments. The sequence of the early Palaeoproterozoic events which point to a significant oxidation of the hydrosphere, including the formation of phosphorites and changes in the phosphorous cycle, mimics the sequence which was repeated at the Neoproterozoic-Cambrian transition, implying that oxidation of the terrestrial atmospherehydrosphere system experienced an irregular cyclic development.

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Formation of mineral phosphate microtubes in the presence of halophilic cyanobacteriumMicrocoleus chthonoplastes

Cited by 4 publications

References 4 publications

Barite deposition resulting from phototrophic sulfide-oxidizing bacterial activity

Barite deposition resulting from phototrophic sulfide-oxidizing bacterial activity

Ordovician–Silurian Chileida—First Post-Cambrian Records of an Enigmatic Group of Brachiopoda

Early Proterozoic (2.04 GA) phosphorites of Pechenga Greenstone Belt and their origin

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