Petrographic and mineralogical characteristics of diagenetic overprinting in Neoproterozoic diamictites from Murchisonfjorden, Nordaustlandet, Svalbard

• Autorzy: Bal Szczepan , Nejbert Krzysztof , Michalski Krzysztof , Domańska-Siuda Justyna , Manby Geoffrey , Hołda-Michalska Aleksandra , Sláma Jiří

Identyfikatory

DOI

10.2478/mipo-2025-0004

• Języki publikacji: EN

Abstrakty

EN

The diagenetic processes exhibited by the Neoproterozoic diamictites from Murchisonfjorden (Nordaustlandet, NE Svalbard) are presented. Diamictite samples from the Cryogene Polarisbreen Group - the Petrovbreen Member of the Elbobreen Formation and the Wilsonbreen Formation were analysed. The mineralogical associations composed of chlorite group minerals (chamosite), albite, calcite, Fe-dolomite, clay minerals (illite) and quartz, recognized by integrated optical microscopy, scanning electron microscopy (SEM) and Raman spectroscopy techniques are typical for an advanced stage of mesogenetic diagenesis. Low-grade burial mineral associations were not identified. Our investigations indicate that during diagenesis increased heat flux accompanied fluid migration and remineralization. Identified Fe-Ti – oxides, anatase in thin sections and magnetite identified by rock-magnetic experiments are the products of the secondary diagenetic mineralization. The ferromagnetic carriers representing primary depositional remanence magnetization (DRM) were not preserved.

Słowa kluczowe

EN

diamictites; Neoproterozoic; Svalbard; diagenesis; Snowball Earth

• Wydawca: Mineralogical Society of Poland
• Czasopismo: Mineralogia
• Rocznik: 2025
• Tom: Vol. 56, iss. 1
• Strony: 23--33
• Opis fizyczny: Bibliogr. [37] poz., rys., tab., wykr.

Twórcy

autor

Bal Szczepan

• Institute of Geophysics Polish Academy of Sciences, ul. Księcia Janusza 64, 01-452 Warsaw, Poland

• https://orcid.org/0000-0002-0788-3067

autor

Nejbert Krzysztof

• Department of Geology University of Warsaw, ul. Żwirki i Wigury 93, 02-089 Warsaw, Poland

autor

Michalski Krzysztof

• Institute of Geophysics Polish Academy of Sciences, ul. Księcia Janusza 64, 01-452 Warsaw, Poland

autor

Domańska-Siuda Justyna

• Department of Geology University of Warsaw, ul. Żwirki i Wigury 93, 02-089 Warsaw, Poland

autor

Manby Geoffrey

• Natural History Museum, Cromwell Road, London SW7 5BD, UK

autor

Hołda-Michalska Aleksandra

• Institute of Paleobiology Polish Academy of Sciences, ul. Twarda 55/51, 00-818 Warsaw, Poland

autor

Sláma Jiří

• Institute of Geology of the Czech Academy of Sciences, Rozvojová 269, 165 00 Praha 6 - Lysolaje, Czech Republic

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025).