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Geological Quarterly

Tytuł artykułu

Brine palaeocurrent analysis based on oriented selenite crystals in the Nida Gypsum deposits (Badenian, southern Poland)

Autorzy Bąbel, M. 
Treść / Zawartość
Warianty tytułu
Języki publikacji EN
EN Unique sedimentary structures indicating the direction of brine currents are present in the Middle Miocene (Badenian) evaporite basin in Carpathian Foredeep. They occur within widespread gypsum deposits cropping out along the northern margin of the Foredeep, in Ukraine, Poland and the Czech Republic. The primary bottom-grown selenite crystals show apices turned horizontally in the same or similar directions, and are interpreted as the direction of inflowing calcium sulphate oversaturated brine. The upstream directed crystals are used to reconstruct brine palaeocurrents in outcrops of the Nida Gypsum deposits in NW margin of the Foredeep evaporite basin in Poland. Palaeocurrent analysis is based on simplified measurements which consisted in the determination of azimuth intervals enclosing groups of conformably oriented crystals. Measurements revealed that the brine flowed into the study area mainly from north and east, and outflowed farther towards the SW. This palaeoflow is roughly parallel to the basin margin contour and is a part of the longshore counterclockwise brine circulation well documented in other areas of the basin. Local deviations from the uniform flow directions suggest presence of shoals and islands forming obstacles for the brine streamlines on the Nida area.
Słowa kluczowe
EN palaeocurrent analysis   brine   gypsum crystals   sedimentology   evaporites  
Wydawca Państwowy Instytut Geologiczny - Państwowy Instytut Badawczy
Czasopismo Geological Quarterly
Rocznik 2002
Tom Vol. 46, No 4
Strony 435--448
Opis fizyczny
autor Bąbel, M.
  • Institute of Geology, University of Warsaw, Al. Żwirki i Wigury 93, PL-02-089 Warszawa, Poland,
Kolekcja BazTech
Identyfikator YADDA bwmeta1.element.baztech-article-BAT3-0013-0047