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Provenance of heavy minerals to the Middle and Upper Jurassic epicontinental deposits of NW Poland

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cris.lastimport.scopus2024-02-12T20:06:39Z
dc.abstract.enThe source of clastic material supplied to the epicontinental sea during the Middle and Late Jurassic in the Pomeranian Segment of the northern part of the Mid-Polish Trough is analysed, using deposits from the Rzeczyn PIG-1 borehole that represent the Łyna, Chociwel, Brda, Pałuki, Kcynia and Rogoźno formations. Heavy mineral analysis, including weathering indices (ZTR, GZI, RZI and Q) and standardised scores for each mineral species, shows that each formation is characterized by a different heavy minerals association. In each association, transparent minerals include both ultrastable minerals (zircon, tourmaline and rutile), occurring in various proportions, and unstable minerals. This indicates that deposits subject to earlier multiple reworking were eroded from the surrounding landmasses. Most probably these deposits represented Triassic rocks, although fresh weathering covers were also eroded. The main direction of clastic material supply was from the N and NW, and to a lesser degree from the NE. The main reasons for changes in the source areas were probably sea level oscillations, while during regressions, exposed parts of the seabed became source areas of clastic material. Conversely, during transgressions, parts of the seabed became cut off from the supply of clastic material from eroded landmasses.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorZIÓŁKOWSKI, Piotr
dc.contributor.authorWoronko, Barbara
dc.contributor.authorBEMBENEK, Kinga
dc.date.accessioned2024-01-25T18:21:37Z
dc.date.available2024-01-25T18:21:37Z
dc.date.issued2021
dc.description.financePublikacja bezkosztowa
dc.description.number1
dc.description.volume65
dc.identifier.doi10.7306/GQ.1573
dc.identifier.issn1641-7291
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/117321
dc.identifier.weblinkhttp://dx.doi.org/10.7306/gq.1573
dc.languageeng
dc.pbn.affiliationearth and related environmental sciences
dc.relation.ispartofGeological Quarterly
dc.relation.pages1-18
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.subject.enweathering indices
dc.subject.ensea level change
dc.subject.enstratigraphic gaps
dc.titleProvenance of heavy minerals to the Middle and Upper Jurassic epicontinental deposits of NW Poland
dc.typeJournalArticle
dspace.entity.typePublication