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Geology of the Lower Subtatric Nappe, Kopy Sołtysie area, Eastern Tatra Mts (West Carpathians, Poland)

Birkenmajer K.

Studia Geologica Polonica

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2012

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Vol. 135

55-116

EN

Stratigraphic sequence of the Lower Subtatric Succession in the eastern part of the Polish Tatra Mountains includes 15 Triassic, Jurassic and Lower Cretaceous mappable lithostratigraphic units of formation ranks. Some formations include also non-mappable lithostratigraphic units of local significance, of member and bed ranks. This stratigraphic succession is typical of the Lower Subtatric Nappe (= Križna Nappe) which originated during the meso-Cretaceous (Turonian) Mediterranean orogenic phase. The older post-nappe cover (?Upper Cretaceous or ?Paleocene-Lower Eocene), unconformable upon the Lower Subtatric Nappe, is represented by an unfossiliferous Gosau-facies conglomerate (Rusinowa Fm.) consisting of Triassic to Lower Cretaceous rock fragments derived from this nappe. The Lower Subtatric Nappe has been subdivided into several second-order thrust-sheets (partial-nappes vel daughter units) of restricted lateral extension, thrust one over another from north to south (retro-arc). The Gosau-facies conglomerate (Rusinowa Fm.) takes part in the thrust-sheet architecture which was accomplished in the Tatra Mts prior to the Middle Eocene transgression, either during the Laramian (Cretaceous/Paleocene boundary) or the Pyrenean (Middle Eocene) orogenic phases. The younger post-nappe cover consists of the Middle Eocene basal conglomerates and nummulitic limestones succeeded by a thick Podhale Flysch complex (Oligo- cene). A dense transversal (vertical to strike-slip) fault system which dissects rocks of the Lower Subtatric Nappe, its daughter units and post-nappe covers, had formed due to meridional stress active during the Middle Miocene.This fault system plays an important part in correct recognition and correlation of particular tectonic units.

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Górny tyton i berias w płaszczowinie reglowej dolnej Tatr Zachodnich w świetle danych lito-, bio- i magnetostratygraficznych

Grabowski J., Pszczółkowski A.

Przegląd Geologiczny

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2006

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Vol. 54, nr 10

870-877

EN

Detailed magnetostratigraphic investigations of the Tithonian–Berriasian strata, integrated with litho- and biostratigraphic observations were carried out within the Bobrowiec Unit of the Lower Sub-Tatric (Krina) Nappe in theWestern Tatra Mts. Amodification of the existing lithostratigraphic scheme is proposed, splitting the Pieniny Limestone Formation (sensu Lefeld et al. 1985) into two formations, accordingly with lithostratigraphic subdivisions of the coeval deposits in some other parts of the Krina Nappe in Slovakia: the Jasenina Formation (includes Pośrednie Member sensu Pszczółkowski 1996, in its uppermost part) and the Osnica Formation (Osnica Member sensu Pszczółkowski 1996). The Jurassic/Cretaceous boundary, as defined by calpionellids, falls within the lowermost part of the Osnica Fm. Magnetozones from CM20r (Lower/Upper Tithonian boundary) up to CM16n (Upper Berriasian) were identified. Jurassic/Cretaceous boundary is situated within the CM19n magnetozone, below the short reversed Brodno subzone. Magnetostratigraphic correlation of four sections revealed existence of some “gaps” which are interpreted as tectonic reductions, which have to be considered while calculating the sedimentation rate which, however, might be roughly estimated. Sedimentation was relatively slow within the Jasenina Formation (5–7 m/My), but accelerated within the Osnica Fm (mean value: 10–15 m/My) and in the investigated lower part of the Kościeliska Marl Fm (20–30 m/My). Presence of hematite correlates with low sedimentation rate.

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Early Diagenetic Processes in the Formation of Carbonate-Hosted Mn Ore Deposit (Lower Jurassic, Tatra Mountains) as Indicated from Its Carbon Isotopic Record

Krajewski K., Lefeld J., Łącka B.

Bulletin of the Polish Academy of Sciences. Earth Sciences

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2001

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Vol. 49, nr 1

13-29

EN

The Lower Jurassic Huciska Limestone Formation (lower Sub-Tatric nappe) in the Western Tatra Mountains locally hosts lens-like bodies of Mn-ore deposit (the Banie Ore Bed). The ore is composed of crinoidal sediment containing both Mn-oxides (bixbyite, hausmannite, todorokite, birnessite) and Mn-carbonates (manganic calcite, kutnahorite, calcic rhodochrosite, rhodochrosite). This composition reflects deposition of Mn oxide-rich sediment as a result of episodes of downslope gravitational transport in a marginal part of the Krizna basin, and early diagenetic formation of Mn-carbonates resulting from bacterial reduction of manganese in a nearsurface environment. The diagenetic reduction of manganese brought about important decrease of d(13)C values (-1.2‰ to +0.5‰) of carbonate carbon in the Mn-ore deposit, which stands in a marked contrast to positive carbon values (+2.0‰ to +3,6‰) of the besting carbonate facies in the Huciska Limestone Formation. Enhanced deposition and diagenesis of manganese in the Huciska Limestone Formation is a result of elevated Mn content in the Toarcian Tethys, reflecting both increased Mn supply associated with initial stage of ocean floor spreading and development of widespread oxygen-minimum zones in basinal settings.

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Correlation of the lower subtatric nappe partial units across the Biała Woda Valley, Tatra Mts, Carpathians

Birkenmajer K.

Bulletin of the Polish Academy of Sciences. Earth Sciences

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2000

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Vol. 48, nr 2

231-245

EN

Correlation of partial units of the Lower Subtatric Nappe (= Krizna Nappe) across the Biała Woda Valley (SK: Belovodska dolina; l - left slope; r - right slope), Eastern Tatra Mts, here presented, is a revision of that recently (1999) proposed by J. Lefeld. The Holica-Zadnia Kopa unit (r) seems to wedge out westward (l), but possibly reappears still further west as the Suchy Wierch unit. The Czerwona Skałka unit (r) continues westward as the Gęsia Szyja unit (l). The Złoty Wierch scale (l) is a local unit; it does not continue eastward (r), but may continue westward in the Dolina Filipka Valley. The Palenica unit stretches from west (l) to east (r) across the valley; further east, in the Javorova dolina valley, it probably continues as the "Tatry Bielskie unit" sensu Lefeld.