Description

• Title:
  Iron-bearing phases affecting the colour of upper Neogene clayey sediments from Dymaczewo Stare, west-central Poland
• Creator:
  Klęsk, Jakub;
  Błachowski, Artur;
  Diduszko, Ryszard;
  Kruszewski, Łukasz;
  Widera, Marek
• Description:
  The present paper investigates the colour dependence of mineral compositions in clay-rich sedimentary strata, mainly clayey silts, the emphasis being on iron-bearing minerals (rather than clay minerals) by using powder X-ray diffraction (PXRD) and 57Fe Mössbauer spectroscopy (57Fe-MS). The PXRD-based phase analysis has demonstrated the variable compositions of samples, consisting of, inter alia, quartz, calcite or gypsum, and admixtures of potassium feldspars and plagioclase. Hematite + goethite (sample D1, dark red), goethite (sample D2, pinkish brown), poorly crystalline goethite (sample D3, orange) and jarosite (sample D4, yellow) have been distinguished. A very low jarosite content was detected in sample D5 (light grey); this did not affect its colour. The potential yellow/brown shades in sample D6 (dark grey), coming from trace amounts of jarosite, are masked by macroscopically visible organic matter. In the case of the two last-named samples (D5 and D6), with trace amounts of Fe-bearing minerals, it is most likely that the organic matter was effective in influencing the light and dark grey colour of the sediment, respectively.
• Object availability:
  free access
• Rights:
  Prawa autorskie (c) 2022 Jakub Klęsk, Artur Błachowski, Ryszard Diduszko, Łukasz Kruszewski, Marek Widera;
  https://creativecommons.org/licenses/by-nc-nd/3.0/
• Date:
  2022.08.31
• Type:
  info:eu-repo/semantics/article;
  info:eu-repo/semantics/publishedVersion;
  Research papers
• Language:
  English
• Source:
  Geologos; Vol. 28 No. 2 (2022): ; 129-139;
  Geologos; Tom 28 Nr 2 (2022): ; 129-139;
  2080-6574;
  1426-8981
• Format:
  application/pdf
• Publisher:
  Adam Mickiewicz University Poznan
• Relation: http://pressto.amu.edu.pl/index.php/logos/article/view/35609/31821
• Subject:
  mineral composition;
  powder X-ray diffraction (PXRD);
  iron minerals;
  57Fe Mössbauer spectroscopy (57Fe- MS);
  Poznań Clays;
  Mio-Pliocene
• Identifier: http://pressto.amu.edu.pl/index.php/logos/article/view/35609
• Data provider:
  Platforma Otwartych Czasopism Naukowych UAM
• Can I use it?:
  seek permission
• Type:
  other