Calcified cyanobacteria fossils from the leiolitic bioherm in the Furongian Changshan Formation, Datong (North China Platform)

Latif, Khalid; Xiao, Enzhao; Riaz, Muhammad; Hussein, Abdullah Ali Ali

doi:10.1007/s13146-018-0472-8

Cited by 16 publications

(3 citation statements)

References 70 publications

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“…Under the close observation of these EPS lamellae, the surfaces have irregular band‐like shapes with an ultramicroscopic honeycomb surficial pore structure (Figure 6f). This characteristic agrees with the basic interpretation of residual calcification of EPSs reported by previous studies, and the composite mineralogical results for nanosphere aggregates represent products from the interaction of heterotrophic bacteria metabolism and the degradation of EPSs (Dupraz et al, 2009; Latif, Xiao, Riaz, & Hussein, 2019; Mei, 2012; Mei et al, 2021; Mei, Latif, Mei, Gao, & Meng, 2020; Mei, Riaz, Wang, Latif, & Zhang, 2020; Xiao, Latif, Riaz, Qing, & Wang, 2018), implying that a preliminary phase of biogenic carbonate particle nucleation was induced by microbial metabolism (Spadafor, Perri, Mckenzie, & Vasconcelos, 2010).…”

Section: Discussionsupporting

confidence: 92%

Cambrian marine radial cerebroid ooids: Participatory products of microbial processes

et al. 2021

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The Cambrian Miaolingian Series strata at the Kouquan section, North China, are primarily divided into the Xuzhuang, Zhangxia, and Gushan formations. This particular series comprises oolitic limestone in the middle to upper intervals. Thin section observations of carbonate rock samples from the Zhangxia Formation show that the well‐preserved and most remarkable grains among them are cerebroid ooids. Although these ooids have characteristic serrated margins, they are distinct from ooids reported in previous publications due to inconspicuous concentric laminae and radial structures composed of micrite and microspar. To understand the origin of these ooids, we employed petrographic examination, X‐ray diffraction (XRD), scanning electron microscopy (SEM), electron probe microanalysis (EPMA), and isotope analyses to explore their compositions and conditions of development. In addition, the occurrence of these cerebroid ooids is closely related to that of dark‐coloured micrite: most cerebroid ooids and quasi‐cerebroid ooids float inside dark micrite; dark micrite appears in the interior of cerebroid ooids as a radial micrite structure. EPMA and energy‐dispersive X‐ray (EDX) spectroscopy analyses of micrite reveal that the dark micrite consists of lithomicrobial mats. Fine‐scale characterization of the dark micrite inside these cerebroid ooids shows the presence of filamentous and bowl‐shaped calcified microbial fossils and extracellular polymeric substance (EPS) calcified remnants. Isotopic data indicate a variation of δ13C isotopic values between −4.92‰ and −0.11‰ (VPDB) and −9.89‰ and −4.93‰ for δ18O values (VPDB). The negative values of δ13C in the studied ooid suggest the genesis of carbon from the high organic‐rich zone such as the microbial zone. Also, the 13C‐depleted carbon values in the ooids advocate that the carbon is mainly derived from organic sources associated with the sulphate reduction bacterial activity. Thus, isotopic data of this study also provide consistent clues in favour of microbial participation during the genesis of cerebroid ooids. In conclusion, our new findings strongly confirm that the cerebroid ooids of the North China Platform are genetically related to microbial processes.

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Section: Discussionsupporting

confidence: 92%

Cambrian marine radial cerebroid ooids: Participatory products of microbial processes

et al. 2021

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“…However, many of them have been considered mostly fossil calcified cyanobacteria (Riding 1991; Latif et al . 2019) and others such as Renalcis and Epiphyton are regarded as algae (Luchinina 2013 and references therein), as problematic calcified microfossils (Liu et al . 2017) or as colonies of calcified coccoid cyanobacteria (Zhang et al .…”

Section: Palaeoenvironmental Reconstruction Of the Lost Cambrian Plat...mentioning

confidence: 99%

“…The affinities of calcimicrobes have been a controversial issue; they have been interpreted as cyanobacteria, green and red algae, diagenetic microfossils, fossilised biofilm clusters or fossilised microbial colonies (Pratt 1984;Riding 1991Riding , 2001Stephens & Sumner 2002;Woo & Chough 2010 and references therein). However, many of them have been considered mostly fossil calcified cyanobacteria (Riding 1991;Latif et al 2019) and others such as Renalcis and Epiphyton are regarded as algae (Luchinina 2013 and references therein), as problematic calcified microfossils (Liu et al 2017) or as colonies of calcified coccoid cyanobacteria (Zhang et al 2019). In the Shackleton Range, calcimicrobes clearly linked to filamentous cyanobacteria are Girvanella, Subtifloria (calcified oscillatorialean cyanobacteria) or Proaulopora (calcified nostocalean cyanobacterium) according to Liu et al (2020).…”

Section: Open Subtidal Platform Setting: Calcimicrobe Carpets Calcimi...mentioning

confidence: 99%

Reconstruction of a Ross lost CambrianSeries 2mixed siliciclastic–carbonate platform from carbonate clasts of the Shackleton Range, Antarctica

Rodríguez-Martínez

Buggisch

Menéndez

et al. 2022

Earth and Environmental Science Transactions of the Royal Society of Edinburgh

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The presence of archaeocyath-bearing clasts from Cenozoic tills and Cambrian Mount Wegener Formation reveal erosion of a hidden Cambrian carbonate platform in Shackleton Range, Antarctica. We provide microfacies, paleontological, diagenetic and tectonically induced fabric data from carbonate clasts which, in addition to available geochemical and geochronological data from Shackleton Range, allow the paleoenvironmental reconstruction of a lost Cambrian Series 2 mixed siliciclastic–carbonate platform that was developed and eroded during the Ross orogeny. Carbonate production was dominated by non-skeletal grains in possibly restricted platform-interior and oolitic shoal complex settings, while open subtidal sub-environments (calcimicrobe carpets, calcimicrobe–archaeocyath patch reefs, muddy bottoms) were dominated by a diverse calcimicrobe assemblage and/or by secondary to accessory heterozoan assemblage (archaeocyaths and other sponges, chancelloriids, hyoliths, coralomorphs, trilobites, echinoderms). We describe a Botoman assemblage with 34 archaeocyathan species among 12 existing archaeocyathan genera. A new archaeocyath family Shackletoncyathidae is proposed. New species (Rotundocyathus glacius sp. nov., Buggischicyathus microporus gen. et sp. nov., Paragnaltacyathus hoeflei, Shackletoncyathus buggischi gen. et. sp. nov., Santelmocyathus santelmoi gen. et sp. nov., Wegenercyathus sexangulae gen. et sp. nov.) and Tabulaconus kordae coralomorph are reported from Antarctica for the first time. Archaeocyathan fauna share few species with contemporary fauna of South Australia (9) and even fewer with the Antarctic platforms of the Shackleton Limestone (2) or the Schneider Hills limestone (1). Similarity is greater with Antarctic allochthonous assemblages of Permo-Carboniferous tillites from Ellsworth Mountains (2), Cenozoic deposits from King George Island (4) or Weddell Sea (1). The Shackleton Range lost/hidden platform shows a distinct entity related with its tectonosedimentary evolution, in a possible back-arc basin on the Mozambique seaway during the E and W Gondwana amalgamation, which distinguishes it from those developed on the palaeo-Pacific margin of the E Antarctic craton.

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Sequence stratigraphy, depositional and diagenetic environments of the late Cambrian glauconite bearing oolitic limestones in the Kelan Section, Shanxi, China

et al. 2022

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Calcified cyanobacteria fossils from the leiolitic bioherm in the Furongian Changshan Formation, Datong (North China Platform)

Cited by 16 publications

References 70 publications

Cambrian marine radial cerebroid ooids: Participatory products of microbial processes

Cambrian marine radial cerebroid ooids: Participatory products of microbial processes

Reconstruction of a Ross lost CambrianSeries 2mixed siliciclastic–carbonate platform from carbonate clasts of the Shackleton Range, Antarctica

Sequence stratigraphy, depositional and diagenetic environments of the late Cambrian glauconite bearing oolitic limestones in the Kelan Section, Shanxi, China

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