Iron-bearing phases affecting the colour of upper Neogene clayey sediments from Dymaczewo Stare, west-central Poland
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-base...
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| Format: | Article |
| Language: | English |
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Sciendo
2022-08-01
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| Series: | Geologos |
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| Online Access: | https://doi.org/10.2478/logos-2022-0010 |
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| author | Klęsk Jakub Błachowski Artur Diduszko Ryszard Kruszewski Łukasz Widera Marek |
| author_facet | Klęsk Jakub Błachowski Artur Diduszko Ryszard Kruszewski Łukasz Widera Marek |
| author_sort | Klęsk Jakub |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-04-13T16:40:45Z |
| format | Article |
| id | doaj.art-3a71214353b3427a953c8900017a7d10 |
| institution | Directory Open Access Journal |
| issn | 2080-6574 |
| language | English |
| last_indexed | 2024-04-13T16:40:45Z |
| publishDate | 2022-08-01 |
| publisher | Sciendo |
| record_format | Article |
| series | Geologos |
| spelling | doaj.art-3a71214353b3427a953c8900017a7d102022-12-22T02:39:15ZengSciendoGeologos2080-65742022-08-0128212913910.2478/logos-2022-0010Iron-bearing phases affecting the colour of upper Neogene clayey sediments from Dymaczewo Stare, west-central PolandKlęsk Jakub0Błachowski Artur1Diduszko Ryszard2Kruszewski Łukasz3Widera Marek4Institute of Geology, Adam Mickiewicz University, Krygowskiego 12, 61-680Poznań, PolandFaculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, al. Mickiewicza 30, 30-059Kraków, PolandInstitute of Microelectronics and Photonics, Łukasiewicz Research Network, Wólczyńska 133, 01-919Warszawa, PolandInstitute of Geological Sciences, Polish Academy of Sciences, Twarda 51/55, 00-818Warszawa, PolandInstitute of Geology, Adam Mickiewicz University, Krygowskiego 12, 61-680Poznań, PolandThe 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.https://doi.org/10.2478/logos-2022-0010mineral compositionpowder x-ray diffraction (pxrd)iron minerals57fe mössbauer spectroscopy (57fe-ms)‘poznań clays’mio-pliocene |
| spellingShingle | Klęsk Jakub Błachowski Artur Diduszko Ryszard Kruszewski Łukasz Widera Marek Iron-bearing phases affecting the colour of upper Neogene clayey sediments from Dymaczewo Stare, west-central Poland Geologos mineral composition powder x-ray diffraction (pxrd) iron minerals 57fe mössbauer spectroscopy (57fe-ms) ‘poznań clays’ mio-pliocene |
| title | Iron-bearing phases affecting the colour of upper Neogene clayey sediments from Dymaczewo Stare, west-central Poland |
| title_full | Iron-bearing phases affecting the colour of upper Neogene clayey sediments from Dymaczewo Stare, west-central Poland |
| title_fullStr | Iron-bearing phases affecting the colour of upper Neogene clayey sediments from Dymaczewo Stare, west-central Poland |
| title_full_unstemmed | Iron-bearing phases affecting the colour of upper Neogene clayey sediments from Dymaczewo Stare, west-central Poland |
| title_short | Iron-bearing phases affecting the colour of upper Neogene clayey sediments from Dymaczewo Stare, west-central Poland |
| title_sort | iron bearing phases affecting the colour of upper neogene clayey sediments from dymaczewo stare west central poland |
| topic | mineral composition powder x-ray diffraction (pxrd) iron minerals 57fe mössbauer spectroscopy (57fe-ms) ‘poznań clays’ mio-pliocene |
| url | https://doi.org/10.2478/logos-2022-0010 |
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