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Tourmalines as a Tool in Provenance Studies of Terrigenous Material in Extra-Carpathian Albian (Uppermost Lower Cretaceous) Sands of Miechów Synclinorium, Southern Poland

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dc.abstract.enThe mature transgressive Albian quartz sands in the Miechów Synclinorium contain a poor (<1%) heavy mineral suite consisting of tourmaline, rutile, garnet, staurolite, ilmenite, zircon, monazite, kyanite, and gahnite. The other minerals, especially those containing Fe and Ti (e.g., biotite), are subordinate. Over 512 tourmaline grains from seven outcrops in the Miechów Segment were analysed using electron probe microanalysis (EPMA). The majority of grains belong to the alkali tourmaline group in which the X-site is dominated by Na (0.4 to 0.9 apfu). Detrital tourmalines are mainly dravite with a prevalent schorl end-member with average XMg values over 0.6. Apart from Mg and Fe, the other Y-site cations rarely exceed 0.1 apfu. Fluorine content is usually below the detection limit. Their chemical composition suggests that most tourmaline grains were sourced from Al-rich and Al-poor metapelites/metapsammites. The main source rocks for the Albian sands were rocks from low- to medium-grade metamorphism, probably from Al-rich quartz-muscovite schist and/or muscovite rich gneisses. Additional minor source rocks were granites and pegmatites coexisting with them. A comparison of the examined tourmaline to tourmaline from possible source areas indicates that these areas were located in the eastern part of the Bohemian Massif and/or eastern Sudetes.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorNejbert, Krzysztof
dc.contributor.authorOlszewska-Nejbert, Danuta
dc.contributor.authorKotowski, Jakub
dc.date.accessioned2024-01-26T11:03:22Z
dc.date.available2024-01-26T11:03:22Z
dc.date.issued2020
dc.description.financeŚrodki finansowe przyznane na realizację projektu w zakresie badań naukowych lub prac rozwojowych
dc.description.volume10
dc.identifier.doi10.3390/MIN10100917
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/123521
dc.identifier.weblinkhttps://doi.org/10.3390/min10100917
dc.languageeng
dc.pbn.affiliationearth and related environmental sciences
dc.relation.ispartofMinerals
dc.relation.pages917
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.entourmaline mineral chemistry
dc.subject.enAlbian sands
dc.subject.enheavy-mineral analysis
dc.subject.enprovenance
dc.subject.enBohemian Massif
dc.subject.enMiechów Synclinorium
dc.subject.enPoland
dc.titleTourmalines as a Tool in Provenance Studies of Terrigenous Material in Extra-Carpathian Albian (Uppermost Lower Cretaceous) Sands of Miechów Synclinorium, Southern Poland
dc.typeJournalArticle
dspace.entity.typePublication