Depositional environment and provenance of the Gresten Formation (Dogger) on the southeastern slopes of the Bohemian Massif (Czech Republic, subsurface data)

NEHYBA, Slavomír and Vladimír OPLETAL. Depositional environment and provenance of the Gresten Formation (Dogger) on the southeastern slopes of the Bohemian Massif (Czech Republic, subsurface data). Austrian Journal of Earth Sciences. Wien, Austria: OESTERREICHISCHE GEOLOGISCHE GESELLSCHAFT, 2016, vol. 109, No 2, p. 262-276. ISSN 2072-7151. Available from: https://dx.doi.org/10.17738/ajes.2016.0020.

Basic information

• Original name: Depositional environment and provenance of the Gresten Formation (Dogger) on the southeastern slopes of the Bohemian Massif (Czech Republic, subsurface data)
• Authors: NEHYBA, Slavomír (203 Czech Republic, guarantor, belonging to the institution) and Vladimír OPLETAL (203 Czech Republic, belonging to the institution).
• Edition: Austrian Journal of Earth Sciences, Wien, Austria, OESTERREICHISCHE GEOLOGISCHE GESELLSCHAFT, 2016, 2072-7151.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10500 1.5. Earth and related environmental sciences
• Country of publisher: Austria
• Confidentiality degree: is not subject to a state or trade secret
• Impact factor: Impact factor: 0.733
• RIV identification code: RIV/00216224:14310/16:00096119
• Organization unit: Faculty of Science
• Doi: http://dx.doi.org/10.17738/ajes.2016.0020
• UT WoS: 000392920800011
• Keywords (in Czech): Grestenské souvrství; střední jura; vrtná jádra; provenience; depoziční prostředí
• Keywords in English: Gresten Formation; Middle Jurassic; well cores; provenance; depositional environment
• Tags: NZ, rivok

Abstract

The deposits of the Gresten Formation (Midle Jurassic) obtained from deep wells in the territory of southern Moravia (Czech Republic) have been newly examined with the aim to better describe their provenance and depositional environment. Deposition within a relatively broad flood plain with fluvial/distributive channels, crevasse channels, crevasses splays and coal-swaps have been recognised in the majority of well cores. Basinal/open marine deposits have been less common. The heavy mineral association is quite stable, with significant dominance of garnet and commonly also with high content of zircon. The mineralogical spectra of garnet types were broad with strong dominance of almandines. The rutiles were mostly derived from metapelites and additionally also from metamafic rocks and pegmatites. The results point to mixed sources from both intensively weathered crystalline rocks of the eastern margin of the Bohemian Massif (primary source) and the older sedimentary rocks - especially from the Moravo-Silesian Paleozoic deposits (recycled source).

Abstract (in Czech)

Sedimenty grestenského souvrství (střední jura), které byly získány z jader hlubokých vrtů na jižní Moravě byly nově hodnoceny s cílem bližšího určení jejich depozičního prostředí a provenience. Bylo identifokováno několik dílčích depozičních prostředí: široká výplavová plošina s fluviálními kanály, průvalové sedimenty, uhelné močály a sedimenty otevřeného moře. Zdrojem těchto sedimentů byly jednak intenzivně zvětralé krystalinické horniny východního okraje českého masívu a také starší sedimentární horniny (především sedimenty moravsko-slezského paleozoika).