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Tytuł:
Andrzej Sulimski [1926-1997]
Autorzy:
Borsuk-Bialynicka, M.
Powiązania:
https://bibliotekanauki.pl/articles/21661.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
biography
Miocene
Sulimski Andrzej biography
zoology
paleobiology
Polska
Polish Miocene
small mammal
Foraminiferida
paleontology
paleozoology
Źródło:
Acta Palaeontologica Polonica; 1997, 42, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charakterystyka węgla brunatnego z miocenu Niżu Polskiego na podstawie wybranych profili
Lignite of the Polish Lowlands Miocene: characteristics on a base of selected profiles
Autorzy:
Kasiński, J. R.
Piwocki, M.
Swadowska, E.
Ziembińska-Tworzydło, M.
Powiązania:
https://bibliotekanauki.pl/articles/2062774.pdf
Data publikacji:
2010
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
węgiel brunatny
środowisko sedymentacji
palinologia
petrografia
geochemia
neogen
Niż Polski
lignite
sedimentary environment
palynology
petrography
geochemistry
Neogene
Polish Lowlands
Opis:
W typowych profilach trzech neogeńskich pokładów węgla brunatnego odsłaniających się w kopalniach odkrywkowych na Niżu Polskim i w basenach satelickich zostały przeprowadzone studia porównawcze makro- i mikrofacjalne oraz geochemiczne, w skład których wchodziły badania: sedymentologiczne, paleobotaniczne (w szczególności analiza palinologiczna), litologiczne i petrograficzne węgla oraz geochemiczne. W wyniku tych badań wyróżniono szereg facji, uwarunkowanych głównie czynnikami hydrologicznymi, które można powiązać z subśrodowiskami sedymentacji jeziorno-bagiennej, współcześnie zasiedlonymi przez określone zbiorowiska roślinne. Najbardziej pełny zestaw takich subśrodowisk został przedstawiony dla II łużyckiego pokładu węgla brunatnego w niecce żytawskiej. Sukcesja subśrodowisk sedymentacyjnych i związanych z nimi zbiorowisk roślinnych jest w zasadzie porównywalna z naturalną sukcesją roślinną zarastania zbiornika jeziornego, jednak często bywa zaburzana w związku ze zmianami poziomu wód gruntowych: podnoszenia się w wyniku działania mechanizmów auto- (kompakcja niżejległych osadów, szczególnie istotna w przypadku przejścia od torfu do węgla brunatnego) i allochtonicznych (subsydencja tektoniczna). Podobne zaburzenia mogły powodować także czynniki sedymentacyjne, takie jak progradacja litosomów klastycznych lub podniesienie bazy erozyjnej w następstwie ruchów eustatycznych. Badania wykazały, że tylko kompleksowe badania mikro- i makrofacjalne dają podstawy do przedstawienia wiarygodnej rekonstrukcji środowiska sedymentacji węglotwórczej. Najistotniejsze wyniki pracy stanowi rekonstrukcja następstwa zbiorowisk roślinnych i wnioski na temat zmian warunków hydrologicznych i hydrogeologicznych.
Some selected profiles of three Neogene lignite seams outcropped within opencast mines in the Polish Lowlands and satellite basins have been examined for comparison of macro- and microfacies and geochemical features. The investigations included: sedimenological research, paleobotanical investigation (particularly palynological analysis), lithological and petrographic study of lignite and geochemical examinations of coal have been made there. Some facies related to recent lacustrine/paludal sedimentary subenvironments, qualified at first by hydrological conditions and corresponding with floristic habitats have been established. The most complete inventory of sedimentary subenvironments has been defined within the 2nd lignite seam in the Zittau Basin. The sedimentary subenvironment succession and related floral communities is generally conformable with a natural plant succesion of a lake overgrowth. However, it was frequently interrupted after groundwater level changes: uplifting in the result of autochtonic mechanism (compaction of underlying sediments, most substantial in the case peat to lignite) and allochtonic one (tectonic subsidence). Also sedimentary factors, like progradation of clastic lithosomes and elevation of erosional base after eustatic movements could take part in the disruptions. The examination show that only integrated macro- and microfacial analysis makes it possible to present a reliable reconstrustion of the coal-forming sedimentary environment. The reconstruction of the succession of plant communities and conclusions on hydrological/hydrogeological conditions are the most substantial results of the work.
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2010, 439 (1); 99--153
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Osady glifu krewasowego z miocenu Polski środkowej w okolicach Konina
Crevasse splay deposits from the Miocene of central Poland near Konin
Autorzy:
Widera, M.
Chomiak, L.
Gradecki, D.
Wachocki, R.
Powiązania:
https://bibliotekanauki.pl/articles/2075743.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
glif krewasowy
środowisko wodne
węgiel brunatny
środkowopolski pokład węgla brunatnego
miocen
Konin
crevasse splay
fluvial environment
1st Middle-Polish lignite seam
lignite
Miocene
Central Poland
Konin region
Opis:
The paper presents results of a study of crevasse splay deposits from the Miocene of central Poland near Konin. These mineral deposits occur within the 1st Middle-Polish lignite seam of Middle Miocene age, which is exploited from the Tomislawice lignite opencast mine. They consist of fine-grained sands with an admixture of plant detritus at the top and bottom layers, where the muddy-sandy clasts are present. The investigated crevasse splay deposits are predominantly massive or horizontally stratified, and they occasionally reveal small- to large-scale (planar, trough and ripple) cross-stratification. Thus, they are interpreted as representing dense gravity flows, sheet flows, and channelized flows of variable energy. The crevasse splay was formed subaerially during sudden flood conditions on the floodplain covered by a low-lying mire with predominant herbaceous vegetation. The description of the crevasse splay deposits from the Miocene of central Poland can be helpful in better understanding the sedimentation conditions of relatively thick lignite seams.
Źródło:
Przegląd Geologiczny; 2017, 65, 4; 251--258
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uwagi o wyznaczaniu współczynnika kompakcji ksylitów dla pierwszego środkowopolskiego pokładu węgla brunatnego w centralnej Polsce
Remarks on determining the compaction coefficient of xylites for the first Middle-Polish lignite seam in central
Autorzy:
Widera, M.
Powiązania:
https://bibliotekanauki.pl/articles/2075065.pdf
Data publikacji:
2013
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Middle-Polish lignite seam
xylite compaction
lignite compaction
Middle Miocene
Central Poland
środkowopolski pokład węgla brunatnego
kompakcja ksylitu
kompakcja węgla brunatnego
środkowy miocen
Polska centralna
Opis:
The First Middle-Polish lignite seam of Middle Miocene age is exploited in all opencast mines in the Konin-Turek area, central Poland. This lignite seam contains a large number of xylites, for which the compaction coefficient was calculated as equal to 1.2. On the other hand, it is known that the compaction coefficient for the whole 1st Middle-Polish lignite seam is approximately 2.0. It follows that the compaction coefficient of xylites is 60% of the compaction coefficient for the whole lignite seam. Therefore, the compaction coefficient for the 1st Middle-Polish lignite seam can be easily determined on the basis of the compaction coefficient of xylites. In contrast to other methods, compaction studies of xylites are characterised by easy measurements and simple calculations, and allow neglecting, e.g., post-sedimentary deformation of the lignite seam.
Źródło:
Przegląd Geologiczny; 2013, 61, 5; 304--310
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Miocene coniferous woods of the Polish Carpathian Foredeep
Autorzy:
Klusek, M.
Powiązania:
https://bibliotekanauki.pl/articles/945876.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
paleoecology
fossil
wood
wood anatomy
Coniferophyta
Miocene
coniferous wood
Polska
Carpathian Foredeep
Opis:
This paper presents the results of analysis of the Miocene woods collected from three sampling sites in the Polish part of the Carpathian Foredeep. The location in the stratigraphic profile and the state of fossil preservation indicate that the woods were transported by waters flowing from highland or from mountainous regions and then deposited and fossilised in delta areas. Fragments of 16 lignified or silicified woods were collected for anatomical research. The fossil woods were classified as Piceoxylon piceae, Juniperoxylon pachyderma, Cupressinoxylon canadense and Cupressinoxylon polonicum. Disturbance zones observed in Cupressinoxylon polonicum are interpreted as frost rings. Frost rings suggest that despite the documented existence of warm and humid climatic conditions during the Miocene period, the temperatures in mountainous areas could temporarily drop below freezing point.
Źródło:
Acta Palaeontologica Polonica; 2014, 59, 3; 697-708
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Palaeoecology of the Middle Miocene foraminifera of the Nowy Sącz Basin (Polish Outer Carpathians)
Autorzy:
Gonera, M.
Powiązania:
https://bibliotekanauki.pl/articles/2060628.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Polska
Paratethys
Middle Miocene
foraminifera
palaeoecology
Opis:
Foraminifera from newly exposed outcrop sections located in a Middle Miocene piggyback basin of the Outer Carpathians Nowy Sącz Basin indicate an environment of normal saline waters on the inner shelf and a temperature not lower than 18oC. The area was ideal for the proliferation of: Miliolina spp., Elphidium crispum, Ammonia beccarii and Pararotalia. The habitat below the sediment surface was not colonised by foraminifera. Planktonic foraminifera are absent. The age of the population studied is referred based on the climate-related data, to the Orbulina suturalis Zone of the Miocene Climate Optimum.
Źródło:
Geological Quarterly; 2012, 56, 1; 107-116
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Origin of natural gases in the autochthonous Miocene strata of the Polish Carpathian Foredeep
Autorzy:
Kotarba, M. J.
Powiązania:
https://bibliotekanauki.pl/articles/191377.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
microbial methane
stable carbon isotopes
thermogenic hydrocarbon gases
carbon dioxide
nitrogen
sulphide hydrogen
autochthonous Miocene strata
Polish Carpathian Foredeep
Opis:
Methane concentrations in natural gases accumulated in the autochthonous Miocene strata of the Polish Carpathian Foredeep (between Kraków and Przemyśl) usually exceeded 90 vol%. Methane and part of the ethane were generated during microbial reduction of carbon dioxide in the marine environment, mainly during the sedimentation of Miocene clays and muds. It is possible that this microbial process has continued even recently. Higher light hydrocarbons (mainly propane, butanes and pentanes) were generated during the diagenesis and the initial stage of the low-temperature thermogenic process. Very small changes in the values of geochemical hydrocarbon indices and stable isotope ratios of methane, ethane and propane with depth are evidence for similar gas generation conditions within the whole Badenian and Lower Sarmatian successions. Only in a few natural gas accumulations within the Upper Badenian and Lower Sarmatian reservoirs are thermogenic gases or thermogenic components present, both generated from mixed, type III/II kerogen. These thermogenic gases, now accumulated mainly in the bottom part of Miocene strata, probably resulted from thermogenic processes in the Palaeozoic– Mesozoic basement and then migrated to the Miocene strata along the fault zones. The presence of low hydrogen concentrations (from 0.00 to 0.26 vol%) within the Miocene strata is related to recent microbial processes. Carbon dioxide and nitrogen, which are common minor constituents, were generated in both microbial and low-temperature thermogenic processes. However, CO2 has also undergone secondary processes, mainly dissolution in water during migration. Hydrogen sulphide, which occurs in natural gases of Lower Badenian strata, was most probably generated during microbial sulphate reduction of the Lower Badenian gypsum and anhydrites.
Źródło:
Annales Societatis Geologorum Poloniae; 2011, 81, No 3; 409-424
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Newly discovered Early Miocene deposits in the Nowy Sącz area (Magura Nappe, Polish Outer Carpathians)
Autorzy:
Oszczypko, N.
Oszczypko-Clowes, M. A.
Powiązania:
https://bibliotekanauki.pl/articles/2059925.pdf
Data publikacji:
2002
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Outer Carpathians
Magura Nappe
Early Miocene
calcareous nannoplankton
palaeotectonic implications
Opis:
In the Nowy Sącz area Early Miocene marine deposits have been discovered in the southern part of the Rača Subunit, and at the front of the Bystrica Subunit of the Magura Nappe. These deposits belong to the Zawada Formation, which is represented by medium- to thick-bedded glauconitic sandstones with intercalations of thick-bedded marls and marly claystones. The formation is at least 550 m thick. Calcareous nannofossils show the age of the formation to be Early Burdigalian (NN1-2-3 biozones). Due to a lack of exposures the relationship between the deposits of the Malcov and the Zawada formations is not yet clear. However, comparing the youngest age of the Malcov Formation in the Nowy Sącz I borehole (NP 25) with the age of the Zawada Formation suggests sedimentary continuity transition between these formations.
Źródło:
Geological Quarterly; 2002, 46, 2; 117-134
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Foraminiferal record of the Middle Miocene climate transition prior to the Badenian salinity crisis in the Polish Carpathian Foredeep Basin (Central Paratethys)
Autorzy:
Peryt, D.
Powiązania:
https://bibliotekanauki.pl/articles/2060010.pdf
Data publikacji:
2013
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Middle Miocene
Foraminifers
Paratethys
Badenian
alinity Crisis
Carpathian Foredeep
Opis:
Foraminifers occurring in marls underlying the Middle Miocene Badenian gypsum in the northern Polish Carpathian Foredeep in one borehole section [Młyny (Busko) PIG 1] and in two dewatering pits in operating quarries (Leszcze and Borków) contain well-preserved foraminifers. Sixty-seven species of benthic and twenty-one species of planktonic foraminifers are recorded in the 12-m-thick section of the Młyny borehole. Benthic assemblages are characterized by the dominance of Bulimina and Uvigerina while planktonic assemblages are composed mainly by warm-water orbulinids and Globigerinoides spp. in the lower part of the Młyny section and by temperate-cold water Globigerina spp. in the upper part of the Młyny section as well as the Leszcze and Borków sections. The taxonomic composition of foraminiferal assemblages makes it possible to distinguish two foraminiferal zones in the Młyny borehole: the Orbulina suturalis and Uvigerina costai zones, and only the latter zone is accessible at Leszcze and Borków. The benthic foraminiferal successions in the studied interval suggest oxygenation and productivity changes in the Carpathian Foredeep Basin prior to the Badenian salinity crisis. Four intervals of lowered oxygenation and/or elevated organic flux to the sea-floor are recognized; the intervals in which foraminiferal assemblages suggest marine environments with lowered oxygenation in bottom waters alternate between the intervals where stress markers form less than 50% of the benthic foraminiferal assemblages. Benthic assemblages are moderately to highly diversified, and species have more equal frequencies. The upsection decrease in the proportion of planktonic foraminifers reflects the shallowing of the basin accompanied by a decrease in the temperature gradient between the upper (warmer) and deeper (colder) water beds. The average palaeotemperature of water based on d18O of Uvigerina and Globigerina decreased by ca. 2 and ca. 6°C, respectively (from 9.9 and 17.4°C in the Orbulina suturalis Zone to 7.9 and 11.5°C in the Uvigerina costai Zone, respectively). Below the gypsum, the d18O values of both benthic and planktonic foraminifers show quite large variations possibly due to the salinity increase. Coeval domination of benthic foraminiferal assemblages by Bulimina suggests increased surface water productivity and an increased organic flux to the sea-floor prior to the onset of evaporite deposition and/or salinity increase.
Źródło:
Geological Quarterly; 2013, 57, 1; 141--164
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Macroscopic lithotype characterisation of the 1st Middle-Polish (1st Lusatian) Lignite Seam in the Miocene of central Poland
Autorzy:
Widera, Marek
Powiązania:
https://bibliotekanauki.pl/articles/94313.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
lignite lithotypes
sedimentology
First Middle-Polish Lignite Seam
Miocene
central Poland
litotypy węgla brunatnego
sedymentologia
pierwszy środkowopolski pokład węgla brunatnego
miocen
Polska Centralna
Opis:
The 1st Middle-Polish (1st Lusatian) Lignite Seam is exploited in open-cast mines in central Poland. A large number of lignite lithotypes, grouped in four lithotype associations, are distinguished: xylitic, detritic, xylo-detritic and detro-xylitic lithotype associations, which show various structures. Each lithotype association was produced under specific peat-forming environmental conditions. In the case of the lignite seams under study they represent all the main environments that are known from Neogene mires, i.e.: fen or open water, bush moor, wet forest swamp and dry forest swamp. For a simple and practical description in the field of both the lignite sections and borehole cores, a new codification for lignite lithotypes is proposed. It is based on the codification of clastic deposits (lithofacies). The practical value of the new lignite lithotype codification is examined in three vertical sections of the 1st Middle-Polish Lignite Seam.
Źródło:
Geologos; 2012, 18, 1; 1-11
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Statistical analysis of petrophysical parameters of Middle Miocene rocks from the Polish Carpathian Foredeep
Autorzy:
Bala, M. J.
Jarzyna, J. A.
Mortimer, Z.
Powiązania:
https://bibliotekanauki.pl/articles/2060540.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Middle Miocene
Carpathian Foredeep
fractal correlation dimension
statistical analysis
well logging data
Opis:
Sarmatian thin-bedded sandstone and shales have been a subject of statistical studies to differentiate between good and poor reservoir rocks and to show gas-saturated layers in comparison to water-saturated strata. Statistical studies including fractal analysis were performed on well logging data from the Sędziszów 34 borehole drilled in a belt of hydrocarbon deposits that continue below the northern edge of the Carpathian–Stebnik overthrust. Lithological variability and porosity differentiation and changes in water saturation were traced on the basis of the results of well logging interpretation. Basic statistics and histograms of petrophysical parameters have been analysed. A generalized second order fractal correlation dimension was calculated for all parameters and analysed as for a time series. Fractal dimensions did not correlated with the parameters, but good positive correlations between them and the parameters were observed and showed that the curves analysed had the same type of complexity. High correlation coefficients showed pairs of fractal dimensions for those parameters which had similar variability and the same curve roughness. The fractal correlation dimension described the type of complexity of the parameter (curve roughness) and indicated, for example, how shaliness influenced the reservoir properties of the local Middle Miocene. Therefore, the results were also useful in practice, which gave extra information on thin-bedded reservoir rocks.
Źródło:
Geological Quarterly; 2012, 56, 4; 665--680
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure and Miocene evolution of the Gdów tectonic “embayment” (Polish Carpathian Foredeep) : a new model based on reinterpreted seismic data
Autorzy:
Krzywiec, P.
Bukowski, K.
Oszczypko, N.
Garlicki, A.
Powiązania:
https://bibliotekanauki.pl/articles/2060615.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Carpathian Foredeep Basin
Gdów “embayment”
Miocene
wedge tectonics
Opis:
Analysis of previously available stratigraphic data coupled with the re-interpretation of seismic profiles calibrated by boreholes has allowed the construction of a new tectonic model of evolution of the Gdów “embayment” – a tectonic re-entrant located along the Carpathian front east of Kraków (southern Poland). This model shows that the main phase of localized fault-controlled subsidence took place in the Early Badenian and was associated with deposition of the locally overthickened Skawina Formation. Also, deposition of evaporites of the Wieliczka Formation seems to have been tectonically controlled by local basement faulting. Supra-evaporitic siliciclastic deposits have developed as a result of overall north-directed sediment progradation from the eroded Carpathian belt towards the Carpathian Foredeep. During the final stages of development of the Carpathian fold-and-thrust wedge the previously subsiding Gdów “embayment” area was uplifted and basement faults were reactivated either as reverse faults or as low angle thrust faults. Along the leading edge of this inverted structure a triangle zone developed, with backthrusting along the evaporitic level. As a result, overthickened evaporites, formed in local tectonically-controlled depressions within the area of the Gdów “embayment” area have been strongly folded and internally deformed.
Źródło:
Geological Quarterly; 2012, 56, 4; 907--920
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Granica oligocen/miocen w polskich Karpatach zewnętrznych na podstawie nanoplanktonu wapiennego
Oligocene/Miocene boundary in the Polish Outer Carpathians based on calcareous nannoplankton
Autorzy:
Garecka, M.
Powiązania:
https://bibliotekanauki.pl/articles/2063314.pdf
Data publikacji:
2008
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
nanoplankton wapienny
biostratygrafia
seria menilitowo-krośnieńska
granica oligocen/miocen
polskie Karpaty zewnętrzne
biostratigraphy
calcareous nannoplankton
Menilite-Krosno series
Oligocene/Miocene boundary
Polish Outer Carpathians
Opis:
Badaniami objęto utwory serii menilitowo-krośnieńskiej jednostek śląskiej i skolskiej wschodniej części polskich Karpat Zewnętrznych powyżej korelacyjnych poziomów wapienia jasielskiego i/lub wapienia z Zagórza. W jednostce śląskiej granica oligocen/miocen przebiega w wyższej części warstw krośnieńskich dolnych, w południowej części jednostki - w otryckim regionie facjalnym, w wyższej części łupkowo-piaskowcowej serii nadotryckiej warstw krośnieńskich dolnych, natomiast w południowej części leskiego regionu facjalnego jednostki śląskiej - w obrębie serii przeławicających się pakietów gruboławicowych piaskowców i drobnorytmicznych osadów turbidytowych warstw krośnieńskich dolnych. W bardziej północnej części jednostki seria ta jest zastępowana przez kompleks gruboławicowych piaskowców facji leskiej i w wyższej części tego wydzielenia stwierdzono obecność gatunków mioceńskich. W jednostce skolskiej, w jej południowej części, granica przebiega w niższej części warstw krośnieńskich dolnych, a w bardziej północnej i zachodniej części tej jednostki - w obrębie warstw menilitowych. Jako gatunki wskaźnikowe dla wyznaczenia granicy oligocen/miocen zaproponowano: Helicosphaera mediterranea Muller, Helicosphaera recta Haq, Helicosphaera scissura Miller, Dictyococcites bisectus (Hay, Mohler et Wade) Bukry et Percival, Zygrhablithus bijugatus Deflandre i Sphenolithus delphix (Bukry).
The aim of this work was to establish the Oligocene/Miocene boundary in the eastern part of the Polish Outer Carpathians on the basis of calcareous nannoplankton analysis. The investigations focused on the Menilite-Krosno Series of the Silesian and Skole Units overlying the Jasło and/or Zagórz limestone chronohorizons. In the Silesian Unit, the Oligocene/ Miocene boundary is placed in the upper part of the Lower Krosno Beds. In the Otryt facial region (southern part of the Silesian Unit), this boundary runs within the upper part of the shaly-sandy Supra-Otryt series of the Lower Krosno Beds. In the southern part of the Lesko facial region, the boundary is established within a series of thick-bedded sandstones and fine-rythmical turbidite deposits of the Lower Krosno Beds. In the northern part of this region, the series is replaced by thick-bedded sandstones of the Lesko facies. Miocene taxa were recorded in the upper part of these deposits. In the southern part of the Skole Unit the Oligocene/Miocene boundary runs within the lower part of the Lower Krosno Beds, whereas in the more northern and western parts of the unit - within the Menilite Beds. Among taxa proposed as indicative for the Oligocene/Miocene boundary, Helicosphaera mediterranea Muller, Helicosphaera recta Haq, Helicosphaera scissura Miller, Dictyococcites bisectus (Hay, Mohler et Wade) Bukry et Percival, Zygrhablithus bijugatus Deflandre, Sphenolżthus delphix (Bukry) were recorded.
Źródło:
Biuletyn Państwowego Instytutu Geologicznego; 2008, 432; 1-53
0867-6143
Pojawia się w:
Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Origin of parautochthonous Polish moldavites : a palaeogeographical and petrographical study
Autorzy:
Szopa, K.
Badura, J.
Brachaniec, T.
Chew, D.
Karwowski, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/191842.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
Polish tektites
redeposition
river terrace
Miocene
Pleistocene
drainage basin
Opis:
In this article, the most recent moldavite discoveries in Poland and their host sediments are characterised and discussed. They were discovered at Lasów, located about 8 km north of Zgorzelec (Poland) and Görlitz (Germany), about 700 m from the Polish-German border, close to the Lusatian Neisse (Nysa) River. The tektites were collected from Vistulian (Wiechselian) glacial age sand and gravel of a closed quarry pit, associated with the river terraces. In the Lasów area, the moldavite-bearing sediments are Pleistocene in age and represent Lusatian Neisse terrace deposits. They were redeposited from the upper part of the drainage basin of the Lusatian Neisse, probably washed out from the Miocene sediments that filled the Zittau Depression, the Berzdorf–Radomierzyce Depression, the Višňová Depression and the tectonically uplifted Izera Mts. and Działoszyn Depression. The erosion of Miocene deposit occured on a large scale in the uplifted foothills of the Upper Miocene Izera, Lusatia and Kaczawa complexes. The sediment cover was removed from the Działoszyn Depression. The drainage basin of the Lusatian Neisse is the area where moldavites were formed by the Nördlinger Ries impact. The source area of moldavite is the same for the Miocene deposits around Gozdnica, as well as for the Pleistocene sediments at Lasów.
Źródło:
Annales Societatis Geologorum Poloniae; 2017, 87, 1; 1-12
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geology and petroleum geochemistry of Miocene strata in the Polish and Ukrainian Carpathian Foredeep and its Palaeozoic–Mesozoic basement
Autorzy:
Kotarba, M. J.
Peryt, T. M.
Powiązania:
https://bibliotekanauki.pl/articles/191445.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
petroleum system
prospectives of hydrocarbon exploration
Miocene
Palaeozoic–Mesozoic basement
Carpathian Foredeep
Polska
Ukraine
Opis:
This thematic issue of Annales Societatis Geologorum Poloniae contains a set of papers presenting results of a special research project entitled "Petroleum exploration prospectives and hydrocarbon potential of the Miocene strata and Mesozoic–Palaeozoic basement in the borderland area of Poland and Ukraine", led by research teams from the AGH University of Science and Technology in Kraków and the Polish Geological Institute – National Research Institute in Warsaw. The objective of this paper is determination of the geological and geochemical conditions, 1-D and 2-D modelling of petroleum processes and petroleum systems and their influence on the prospectives of hydrocarbon exploration of the Miocene strata in the Polish and Ukrainian Carpathian Foredeep and its Palaeozoic–Mesozoic basement. In particular, a coherent model of geological structure of the area, based both on the synthesis of the earlier published data and on new results of palynological studies of the Upper Precambrian and Lower Palaeozoic, is given. New data on microfacies of the Upper Jurassic and Lower Cretaceous strata and on sedimentology, geochemistry and micropalaeontology of the Middle Miocene rocks are presented.
Źródło:
Annales Societatis Geologorum Poloniae; 2011, 81, No 3; 211-220
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polskie mołdawity – podsumowanie dotychczasowej wiedzy
Polish moldavites – a summary of existing knowledge
Autorzy:
Brachaniec, Tomasz
Szopa, Krzysztof
Karwowski, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/1033074.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Miocene
Polska
Ries
fluvial transport
moldavites
tektites
Opis:
Up to now, twenty Polish moldavites were recovered from fluvial deposits of Gozdnica formation. Apart from typical bottle green colour, moldavites also yield other typical features for tektites like presence of bubbles and inclusions of lechatelierite. Low degree of corrosion and palaeogeography suggest river transport flow from Lusatia to the east direction in the Miocene.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2017, 8; 18-22
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Origin of liquid hydrocarbons accumulated in the Miocene strata of the Polish Carpathian Foredeep and its Palaeozoic–Mesozoic basement
Autorzy:
Więcław, D.
Powiązania:
https://bibliotekanauki.pl/articles/191540.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
oil origin
biomarkers
stable carbon isotopes
oil-oil correlation
Palaeozoic–Mesozoic basement
Polish Carpathian Foredeep
Opis:
Petroleum geochemical data of 34 oils and condensates accumulated in the Carpathian Foredeep and its Mesozoic and Palaeozoic basement were used to assess their origin and genetic type. The analysed liquid hydrocarbons are characterized by variable densities and sulphur contents. No relationship between these parameters and the reservoir rock age has been found. Secondary processes of evaporative fractionation and biodegradation are evidenced for some oils. These processes proceeded most intensively on the oil from Góra Ropczycka-1K well. The oils from Opaka-1, Lubaczów-157 and Góra Ropczycka-1K wells were generated from organic matter deposited in the Upper Jurassic carbonates. The oil from the inflow in Załazie-2 well originated from the Cambrian strata, but also contains biomarkers characteristic of Miocene strata. The next family, genetically connected with the Silurian and Ordovician source rocks, consists of oils accumulated in the Lower Carboniferous carbonates in Nosówka deposit and in the Upper Jurassic in the inflow into Łękawica-1 well. The condensates collected from the Miocene (Łękawica-1, Pilzno-37, Tarnów-39 and -45 wells) and Upper Jurassic strata (Łąkta-27 and Tarnów-5 wells) were generated by organic matter dispersed in the Middle Jurassic or Lower Carboniferous clastic facies. The remaining oils, from Grobla-Pławowice, Wierzchosławice, Jastrząbka Stara, Partynia-Podborze, Dąbrowa Tarnowska, Brzezówka and Zagorzyce deposits, and the inflows into Tarnów-47 and Pilzno-12 wells were generated from kerogen enriched in organic sulphur usually dispersed in carbonate rocks. Such a type of sediments occurs in the Devonian and Lower Carboniferous strata. Also, these strata as well as the underlying Silurian rocks have sufficient maturity for generation of the discussed oils. The oleanane in the discussed oils most probably originates from kerogen of the Upper Cretaceous or Miocene strata, through which these oils migrated and eluted this biomarker.
Źródło:
Annales Societatis Geologorum Poloniae; 2011, 81, No 3; 443-458
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microbial gas system and prospectives of hydrocarbon exploration in Miocene strata of the Polish and Ukrainian Carpathian Foredeep
Autorzy:
Kotarba, M. J.
Peryt, T. M.
Koltun, Y. V.
Powiązania:
https://bibliotekanauki.pl/articles/191552.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
microbial gas
thermogenic gas
source rocks
hydrocarbon potential
organic geochemistry
prospectives of hydrocarbon exploration
autochthonous Miocene strata
Bilche-Volytsia Unit
Carpathian Foredeep
SW Poland
Western Ukraine
Opis:
Molecular composition of natural gases accumulated in autochthonous Miocene strata of the Polish and Ukrainian Carpathian Foredeep is dominated by methane, which usually constitutes over 98 vol%. Methane was generated by the carbon dioxide reduction pathway of microbial processes. Ethane was generated both during microbial and thermogenic processes ("oil window") and propane at the initial stage of the low-temperature thermogenic processes, and also by the microbial processes. The rhythmic and cyclic deposition of Miocene clays and sands as well as the vigorous generation of microbial methane caused that the gas produced in claystone beds was accumulated in the overlaying sandstones, and capped, in turn, by the succeeding claystones. Such generation and accumulation system of microbial gases gave rise to the formation of multi-horizontal gas fields. Analysis of the distribution of immature humic dispersed organic matter in the Upper Badenian and Lower Sarmatian sequences indicates that it is practically homogeneous. A migration range of microbial gases was insignificant and locations of their accumulations would depend only on the existence of proper type of traps (compactional anticlines situated above basement uplifts, sealed by the Carpathian Overthrust and/or by faults; stratigraphic pinching out and stratigraphic traps related to unconformities). Another situation is encountered in the south, beneath the Carpathian Overthrust. The thickness of the autochthonous Miocene strata in this area is more than 1,500 metres. Geochemical studies reveal that from a depth of 2,500 metres starts the process of low-temperature thermogenic hydrocarbon generation (“oil window”). At greater depths, more than 7,500 metres, within the autochthonous Lower Miocene basin only the high-temperature methane ("gas window") could be produced and accumulated.
Źródło:
Annales Societatis Geologorum Poloniae; 2011, 81, No 3; 523-548
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A framework of ichthyofaunal ecostratigraphy of the Oligocene-Early Miocene strata of the Polish Outer Carpathian basin
Podstawy ekostratygrafii ichtiofaunistycznej osadów oligocenu-wczesnego miocenu basenu zewnętrznych Karpat Polskich
Autorzy:
Kotlarczyk, J.
Jerzmańska, A.
Świdnicka, E.
Wiszniowska, T.
Powiązania:
https://bibliotekanauki.pl/articles/191627.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
fossil fish collection
Teleostei
deep-sea sediments
lithostratigraphy
biostratigraphy
fish ecoassemblages
models of changes
ichthyofaunal zonation
ecostratigraphy
Oligocene
Early Miocene
Outer Carpathians
Polska
Opis:
The paper presents the results of an analysis of ichthyofaunal variability throughout the section of the Menilite-Krosno Series (MKS) in the Outer Carpathians of Poland. The studied tanathocoenoses were formed at the bottom of a more than 2,000 m deep northern basin of the Tethys, being largely represented by the continental rise and bottoms of its narrow furrows, and - to a lesser degree - the continental slope and slopes of a submarine high. Lateral variability of statististically representative assemblages of tanathocoenoses hosted in thin, isochro- nous horizons is interpreted as a result of both local changes of ichthyocoenoses and the influence of post-mortem relocation of fishes that mainly dwelled the shelf and upper continental slope. Vertical variability, in turn, is considered as a resulting from changeable conditions of the ecological environment, the input and outflow of taxa whose evolution proceeded in the Indo-Pacific area, and the species extinction. Changeability of ichthyofauna within a ca. 16-m.y.-long interval made it possible to document and formally describe 9 zones and 4 subzones of ichthyofauna of ecostratigraphic character. These zones comprise index, representative and accompanying taxa that belong to different ecological groups. Conceptual models of the origin of ichthyofaunal assemblages of individual zones are presented. It is suggested that the origin of assemblage differentiation resulted from the appearance and disappearance of the oxygen minimum zone in the water column, global and local sea level changes, topography of the basin bottom, as well as final basin infilling by sediments of submarine fans. The described and preserved collection of fossil Carpathian fishes, housed at the Department of Palaeozoology of the University of Wrocław, requires further specialized palaeontological studies in order to reconstruct a more complete composition of the Oligocene-Early Miocene ichthyofauna.
Źródło:
Annales Societatis Geologorum Poloniae; 2006, 76, No 1; 1-111
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mioceńskie sole kamienne i potasowe zachodniej Ukrainy: Seminarium geologiczno-górnicze Polskiego Stowarzyszenia Górnictwa Solnego pt. Złoża soli na kresach wschodnich dawnej Rzeczpospolitej
Miocene rock and potash salts of West Ukraine: Field geological-mining seminar of the Polish Salt Mining Society
Autorzy:
Czapowski, G.
Poborska-Młynarska, K.
Bukowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/183891.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
złoża soli
geologia
eksploatacja
miocen
Ukraina
Miocene
Ukraine
salt deposits
geology
exploitation
Opis:
Polskie Stowarzyszenie Górnictwa Solnego zorganizowało w końcu maja 2008 r. terenowe seminarium geologiczno-górnicze, poświęcone złożom soli na terenie zachodniej Ukrainy. Celem wyjazdu było zapoznanie się geologią i metodami eksploatacji dolnoneogeńskich złóż soli kamiennych i potasowych, występujących na obszarze zapadliska przedkarpackiego i zakarpackiego w zachodniej części Ukrainy. Obecnie, ze względu na skomplikowane warunki hydrogeologiczne, intensywne zjawiska krasu solnego oraz ekstensywne zjawiska poeksploatacyjne od kilku lat nie eksploatuje się już złóż soli na tym obszarze. Z tego też względu pomimo wcześniejszych ustaleń uznano, że zwiedzenie podziemnej kopalni Solotwino oraz odkrywki w Kałuszu jest zbyt niebezpieczne. Metody eksploatacji oraz geologia tych złóż zostały przedstawione uczestnikom seminarium podczas spotkań w biurach zakładów górniczych.
In the end of May 2008 the Polish Salt Mining Society had organized the field seminar focused on development and exploitation of rock and potash salt deposits of the Miocene age, occurred in the Western Ukraine. Actually the exploitation of all salt deposits in the Western Ukraine was stopped in last several years because of complicated geological-hydrological conditions, intensive salt karst phenomena and extensive former salt excavation. It caused that although the former agreements the visiting of underground mine chambers and surface salt quarries (in Kałusz and Sołotwino structures the salts pierced up to the surface) was too danger and in the both visited deposits their geology and methods of salt exploitation were only reported by miners in the office.
Źródło:
Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie; 2009, 35, 3; 479-490
0138-0974
Pojawia się w:
Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nowe znaleziska polskich tektytów z obszaru niecki żytawskiej
A new Polish tektite finds from the Zittau Basin area
Autorzy:
Paszcza, Karolina
Powiązania:
https://bibliotekanauki.pl/articles/2076220.pdf
Data publikacji:
2021
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
mołdawit
tektyty
Nördlinger Ries
miocen
przeróbki
Polska
moldavite
tektite
Miocene
reworking
Polska
Opis:
To date, 36 moldavites have been found in 9 sites from south-western Poland. The newest ones, i.e. 2 tektites, presented herein come from the Turów Mine in the Zittau Basin. Both moldavite specimens were collected from the fluvial sandy gravels of the Gozdnica Formation, of late Miocene age. Taking into account the macroscopic features of the studied glass, it should be assumed that one of them had been reworked over a maximum distance of several kilometres, while the other one had overcome a further reworking, not exceeding50 km though. The moldavites considered herein were most probably ejected from the Ries crater into the Zittau Basin within the Badenian sediments, later transported by the Lusatian Neisse river and finally redeposited within Pannonian sediments.
Źródło:
Przegląd Geologiczny; 2021, 69, 4; 244--247
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics and origin of deformation structures within lignite seams : a case study from Polish opencast mines
Autorzy:
Widera, M.
Powiązania:
https://bibliotekanauki.pl/articles/2060193.pdf
Data publikacji:
2016
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
high-angle inclined strata
faults
folds
fractures
clastic dikes
lignite seams
Miocene of Poland
Opis:
The present paper discusses the genesis of some deformation structures within Miocene lignite seams in Poland. These meso- to macro-scale deformation structures are the best developed in areas where the thickest lignite seams are exploited, that is, in the Bełchatów, Turów and Lubstów lignite opencast mines. They show a wide variety of structures such as high-angle inclined strata, normal and reverse faults and folds, fractures and clastic dikes. These deformation structures were not analysed in terms of the structural development of the lignite-bearing areas, but rather in the context of their origin. The high-angle inclination of clastic sedimentary strata clearly formed mainly as a result of vertical tectonic movements in the sub-Cenozoic basement, their currently measured dip angle being significantly higher than their natural angle of repose. All the observed normal and reverse faults cutting the Miocene strata are a clear example of syn- and/or post-depositional tectonics. The normal faults clearly indicate tensional tectonics while the reverse faults reflect compressional tectonics. In turn, the majority of folds occurring within the lignite seams are a result of peat/lignite compaction. However, one of the folds studied is predominantly the result of vertical displacements in the sub-Cenozoic basement. The en echelon fracture pattern may additionally indicate the horizontal component of these displacements. Finally, the most spectacular and debatable structures are clastic dikes. In this study the genesis of some of them is linked with the evolution of the graben’s marginal fault.
Źródło:
Geological Quarterly; 2016, 60, 1; 181--191
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Foraminiferal and calcareous nannoplankton biostratigraphy of the upper Badenian–lower Sarmatian strata in the SE Polish Carpathian Foredeep
Autorzy:
Peryt, Danuta
Garecka, Małgorzata
Peryt, Tadeusz Marek
Powiązania:
https://bibliotekanauki.pl/articles/2058716.pdf
Data publikacji:
2021
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Middle Miocene
Carpathian Foredeep Basin
foraminifera
nannofossils
palaeoenvironments
Opis:
The Badenian/Sarmatian boundary in the Central Paratethys has been traditionally identified by the faunal turnover recording an important environmental change possibly controlled by the change from marine to brackish conditions. The strata below the Badenian/Sarmatian boundary in the northern Carpathian Foredeep are included into the Pecten beds, and those above it into the Syndesmya beds. Foraminiferal study of the Babczyn 2 borehole which is one of the crucial sections in the northern Carpathian Foredeep, well-known for the depositional age of rhyolite tuff within the Pecten beds dated by Śliwiński et al. (2012) at 13.06 ±0.11 Ma, indicated that in fact the boundary occurs within the Syndesmya beds. This conclusion is based upon the rapid change from a stenohaline foraminiferal fauna to a euryhaline one, and the appearance of the species Anomalinoides dividens, the taxon regarded as the marker for the Sarmatian. In the Babczyn 2 and Cieszanów 1 (located ~2.5 km basinward of Babczyn 2) boreholes, Anomalinoides dividens appears 3.1–3.8 m above the replacement of stenohaline by euryhaline foraminifers. The calcareous nannoplankton study shows that the upper Badenian and the lower Sarmatian strata in the studied sections represent the NN6, undivided NN6-NN7, and NN7 zones.
Źródło:
Geological Quarterly; 2021, 65, 1; 18
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagenesis and reservoir properties of the Middle Miocene sandstones in the Polish segment of the Carpathian Foredeep
Autorzy:
Kozłowska, A.
Kuberska, M.
Maliszewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/191666.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
sandstones
diagenesis
pore space
reservoir properties
Upper Badenian
Sarmatian
Carpathian Foredeep
Opis:
The Upper Badenian and Sarmatian sandstones from eight wells of the Carpathian Foredeep Basin have been studied. The following research methods were used: petrographic analysis with the use of polarizing microscope (staining analysis, cathodoluminescence studies – CL, porosity determinations, fluid inclusion ana- lysis), scanning electron microscope (SEM) investigations and energy dispersive spectrometer studies (EDS ISIS), X-ray diffraction analyses (XRD), isotopic analysis and petrophysical studies. The sandstones are very-fine to medium-grained subarkosic and sublithic arenites and wackes. The main components of the sandstone grain framework are quartz, feldspars (potassium feldspar and plagioclase), lithoclasts (fragments of carbonate rocks, clastic rocks, granitoids, volcanic rocks and quartz-mica schists) and micas (mainly muscovite). Bioclasts (mainly foraminifera), glauconite, ooids, organic matter and accesory minerals are subordinate. Pore spaces between the grains are filled by matrix and by cement (mostly Fe-calcite, quartz overgrowth, dolomite, siderite and kaolinite). The Middle Miocene sandstones show good and very good filtration abilities. Sandstones porosity very often exceeds 20% and permeability is above 100 mD. Primary intergranular porosity is considerably more frequent than secondary intragranular porosity (mainly dissolution of feldspar grains) and intercrystalline porosity (clays microporosity). Effects of the following diagenetic processes can be observed in the sandstones: compaction, cementation, dissolution, replacement and alteration. Primary porosity reduction in sandstones was predominantly caused by mechanical compaction by about 26% and cementation, mainly by calcite, by approximately 35% on the average. Some increase in porosity was caused by dissolution of detrital grains, mainly feldspars, and decay of the soft parts of organisms. Diagenetic and related reservoir properties evolution of the Middle Miocene sand- stones have been accomplished during eo- and mesodiagenesis.
Źródło:
Annales Societatis Geologorum Poloniae; 2011, 81, No 1; 87-103
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Palaeoenvironmental changes preceding the Middle Miocene Badenian salinity crisis in the northern Polish Carpathian Foredeep Basin (Borków quarry) inferred from foraminifers and dinoflagellate cysts
Autorzy:
Peryt, D.
Gedl, P.
Powiązania:
https://bibliotekanauki.pl/articles/2059030.pdf
Data publikacji:
2010
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Carpathian Foredeep
Paratethys
foraminifers
dinoflagellates
Badenian
salinity crisis
Opis:
Study of foraminiferal and dinoflagellate cyst assemblages and palynofacies occurring in 2 m-thick marls cropping out beneath a giant gypsum intergrowth unit in the Borków gypsum quarry in Southern Poland, one of the key Badenian evaporite sections in the Polish Carpathian Foredeep Basin, has shown the presence of 49 species of benthic foraminifers and 11 species of planktonic ones, and 51 dinoflagellate (including 8 redeposited ones). The composition of the foraminiferal fauna and its isotopic signal indicate temperature-stratified, nutrient-rich and thus less-oxygenated marine water. Changes in the relative abundance of epifaunal and infaunal species indicate a clear environmental change during the deposition of the marls. A middle to outer shelf marine, well-ventilated environment with moderate primary productivity existed during the deposition of the bottom part of the marls. Subsequently, infaunal bottom-dwellers became dominant due to a massive increase in food supply to the sea bottom and shallowing of the sea to inner - middle shelf depths, and than a decreasing trend of a relative abundance of the infaunal morphogroups is observed until the top of the marls that were deposited in an inner shelf environment with moderate primary productivity. The calculated palaeotemperatures for particular foraminifer taxa (Globigerina spp., Cibicidoides and Bulimina elongata) show a slight upsection decrease and a decrease in the temperature differences between the bottom and intermediate water beds. Palynofacies are composed of elements of mixed origin, including terrestrial, marine (mainly dinoflagellate cysts) and elements of uncertain derivation (structureless organic matter). The palynological content of most samples indicates their deposition in an open-marine marine environment, in the stable marine conditions of an open shelf basin with no salinity fluctuations. The sample just below the gypsum contains no dinoflagellate cysts, perhaps due to a drastic change in the photic zone leading to a complete collapse of the dinoflagellate flora. Very rare occurrence of planktonic foraminifers in that sample suggest the shallowing of the basin accompanied by a decrease in the temperature gradient between the upper (warmer) and lower (colder) water beds. A shallow, cold water marine environment is indicated for the topmost foraminiferal assemblage.
Źródło:
Geological Quarterly; 2010, 54, 4; 487-508
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-25 z 41

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