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Geosciences 2018, 8(2), 73; https://doi.org/10.3390/geosciences8020073

Miocene Slănic Tuff, Eastern Carpathians, Romania, in the Context of Badenian Salinity Crisis

1
Geographie und Geologie, Salzburg University, Hellbrunnerstraße 34, 5020 Salzburg, Austria
2
Studienzentrum Naturkunde Mineralogie, Universalmuseum Joanneum, Weinzöttlstraße 16, 8045 Graz, Austria
3
OMV Petrom, 22 Coralilor, 013329 Bucharest, Romania
4
Mass Spectrometry Laboratory, Institute of Physics, Maria Curie-Sklodowska University, Plac Marii Skłodowskiej-Curie 5, 20-400 Lublin, Poland
5
Department of Structure of Matter, Earth and Atmospheric Physics and Astrophysics, Faculty of Physics, University of Bucharest, Bulevardul Regina Elisabeta 4-12, 030018 București, Romania
*
Author to whom correspondence should be addressed.
Received: 20 December 2017 / Revised: 12 February 2018 / Accepted: 13 February 2018 / Published: 18 February 2018
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Abstract

New geochronological investigations for the Slănic Formation, correlated with previous bio- and lithostratigaphical information, allow for a better succession of events for the Middle Miocene, including the absolute age of the Badenian salinity crisis in the bend sector of the Eastern Carpathians. Within the green Slănic Tuff, white tuff layers were in evidence. The main element distribution of the white and green tuffs indicates a dacitic composition, with higher SiO2 content for the white tuff. The white tuff has a distinct mineralogical composition with quartz, plagioclase, biotite and clinoptilolite. From such a tuff layer a biotite concentrate gives a 40Ar/39Ar age of 13.7 ± 0.2 Ma. As above these tuff layers discrete levels of gypsum occur, the age documents the beginning of the restrictive circulation and formation of evaporites in this sector of Carpathians during Badenian times. View Full-Text
Keywords: Slănic tuff; geochemistry; mineralogy; absolute age; Neogene climates; salinity crisis; Eastern Carpathians Slănic tuff; geochemistry; mineralogy; absolute age; Neogene climates; salinity crisis; Eastern Carpathians
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Bojar, A.-V.; Barbu, V.; Wojtowicz, A.; Bojar, H.-P.; Hałas, S.; Duliu, O.G. Miocene Slănic Tuff, Eastern Carpathians, Romania, in the Context of Badenian Salinity Crisis. Geosciences 2018, 8, 73.

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