- Tytuł:
- Iron-bearing phases affecting the colour of upper Neogene clayey sediments from Dymaczewo Stare, west-central Poland
- Autorzy:
-
Klęsk, Jakub
Błachowski, Artur
Diduszko, Ryszard
Kruszewski, Łukasz
Widera, Marek - Powiązania:
- https://bibliotekanauki.pl/articles/2204349.pdf
- Data publikacji:
- 2022
- Wydawca:
- Uniwersytet im. Adama Mickiewicza w Poznaniu
- Tematy:
-
mineral composition
powder X-ray diffraction
PXRD
iron minerals
57Fe Mössbauer spectroscopy
57Fe- MS
Poznań clays
Mio-Pliocene
skład mineralny
proszkowa dyfrakcja rentgenowska
minerały żelaza
spektroskopia Mössbauera
iły poznańskie - Opis:
- 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.
- Źródło:
-
Geologos; 2022, 28, 2; 129--139
1426-8981
2080-6574 - Pojawia się w:
- Geologos
- Dostawca treści:
- Biblioteka Nauki
Artykuł