title: New results of stable isotope and petrographic studies of Jurassic glendonites from Siberia
metadata.name: dc.contributor.author
metadata.value: Ершова, Виктория Бэртовна
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2020-09-08T17:00:42Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2020-09-08T17:00:42Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2019
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/19302
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: We present the results of an optical microscopy, cathodoluminoscopy and isotopic study on nine
  glendonite concretions (calcite pseudomorphs replacing metastable hexahydrate ikaite) from Lower-
  Middle Jurassic sediments of Northeast Russia (Anabar Bay and Lena River region). Glendonite concretions
  are mainly found within Late Pliensbachian, Toarcian, Aalenian, Bajocian and Lower Bathonian
  clastic sediments, correlating to episodes of global climatic cooling as determined by independent
  paleoclimate proxy data. Stable carbon and oxygen isotopic values of glendonite concretions suggest
  that the primary source of carbon was derived from diagenetically altered organic matter, and the
  source of oxygen was from seawater. The secondary diagenetic cement is characterized by
  a significantly lighter δ18O and significantly heavier δ13C signature than the isotopic characteristics of
  the bulk rock glendonite concretion. This secondary diagenetic cement is thought to have precipitated
  rapidly during burial diagenesis and since it occupies a significant volume of the glendonite concretion,
  it has the potential to significantly influence the isotopic composition of bulk rock glendonites.
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: en
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: Taylor & Francis
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: New results of stable isotope and petrographic studies of Jurassic glendonites from Siberia
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: Vasilieva-et-al-2019-GFF.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/19302/1/Vasilieva-et-al-2019-GFF.pdf
resources.format: Adobe PDF
resources.size: 2,27 MB