All

What are you looking for?

All
Projects
Results
Organizations

Quick search

  • Projects supported by TA ČR
  • Excellent projects
  • Projects with the highest public support
  • Current projects

Smart search

  • That is how I find a specific +word
  • That is how I leave the -word out of the results
  • “That is how I can find the whole phrase”

Redox geochemistry of the red ‘orthoceratite limestone’ of Baltoscandia: Possible linkage to mid-Ordovician palaeoceanographic changes

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F21%3A00000085" target="_blank" >RIV/00025798:_____/21:00000085 - isvavai.cz</a>

  • Alternative codes found

    RIV/67985831:_____/21:00542527 RIV/00216224:14310/21:00119061 RIV/61989592:15310/21:73610768

  • Result on the web

    <a href="https://www.sciencedirect.com/science/article/pii/S0037073821000865" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0037073821000865</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.sedgeo.2021.105934" target="_blank" >10.1016/j.sedgeo.2021.105934</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Redox geochemistry of the red ‘orthoceratite limestone’ of Baltoscandia: Possible linkage to mid-Ordovician palaeoceanographic changes

  • Original language description

    The orthoceratite limestone of the Ordovician epicontinental sea of Baltoscandia is one of the oldest Phanerozoicexamples of pelagic marine red beds (MRBs). Being enriched in authigenic haematite, MRBs are considered to besensitive palaeoceanographic redox indicators. In this paper, the origin of the reddening of the Ordovician MRBsand its timing and redox conditions were addressed at two sections, and in a drill core in the Kinnekulle area,Sweden, through the application of diffuse reflectance spectroscopy, sedimentary petrology (microfacies andelectron microprobe), bulk-rock and in-situ element geochemistry (laser-ablation ICP-MS) and molybdenumstable isotope systematics. Enrichment in haematite (up to ~0.05 wtprocent) occurred during very early diagenesisunder low sedimentation rates (~5 mm/kyr), which is comparable to several examples of Phanerozoic MRBs.The reddening was associated with the mm-scale, in-situ mobility of Fe, Mn, As, Mo and U, due to Fe–Mnredox cycling between primary and secondary minerals and pore water under oxic and suboxic to anoxic conditions; it was not related to significant changes in seawater chemistry. Stratigraphic red-to-grey transitions likelycoincided with two mid-Darriwilian global regressions (the so-called Täljsten and at the base of the GullhögenFormation), likely due to the effects of changing sedimentation rates and sub-bottom redox potentials. The Ordovician MRBs coincided with a positive delta13C excursion during the middle Darriwilian, which is different to MRBexamples cited from the Devonian to the Cretaceous age, which frequently coincide with shifts to lower valuesof delta13C. Although MRBs are believed to show a time-specific occurrence in greenhouse or transitionalgreenhouse-to-icehouse climatic modes by several authors, our study suggests that causal links between MRBsand global carbon cycle remain unclear

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10505 - Geology

Result continuities

  • Project

    <a href="/en/project/GA19-17435S" target="_blank" >GA19-17435S: Palaeoclimatologic significance of Palaeozoic red pelagic carbonates: time specific facies or products of microbial activity?</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2021

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Sedimentary Geology

  • ISSN

    0037-0738

  • e-ISSN

    1879-0968

  • Volume of the periodical

    420

  • Issue of the periodical within the volume

    July : 105934

  • Country of publishing house

    NL - THE KINGDOM OF THE NETHERLANDS

  • Number of pages

    16

  • Pages from-to

    nestránkováno

  • UT code for WoS article

    000659165600010

  • EID of the result in the Scopus database

    2-s2.0-85106313858