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Tytuł:
Late Jurassic-earliest Cretaceous evolution of the epicontinental sedimentary basin of southeastern Poland and Western Ukraine
Autorzy:
Gutowski, J.
Popadyuk, I. V.
Olszewska, B.
Powiązania:
https://bibliotekanauki.pl/articles/2059544.pdf
Data publikacji:
2005
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Late Jurassic-earliest Cretaceous
SW margin of the East European Platform
stratigraphic correlation
depositional systems
sedimentary sequences
synsedimentary tectonics
Opis:
The following Late Jurassic depositional systems have been recognized in the WUkrainian and SE Polish margin of the East European Platform: shelf slope/basin, open shelf, carbonate ramp, siliciclastic shelf, fluvial/playa, deltaic/swamp, restricted marine/evaporate lagoon. Three depositional megasequences have been identified. Their upper boundaries have been dated by means of targeted stratigraphic studies, compilation of existing data and reinterpretation of stratigraphic correlation concepts respectively as: lower Kimmeridgian divisum/hypselocyclum zones boundary, uppermost upper Kimmeridgian and lower Berriasian. Analysis of thickness and depositional system architecture within themegasequences in six regional cross-sections indicates that depocentre was located in the SW margin of the Mid-Polish Trough during Oxfordian and early Kimmeridgian times and propagated in Tithonian time to the Lviv region. This can be explained by changes in the palaeostress field. Approximately N–S oriented extension during Oxfordian and earliest Kimmeridgian times was replaced by approximately NE–SW oriented extension in Tithonian time. The thickness pattern of the megasequences as well as proximity trends of the system tracts within the sequences clearly coincide with the depocentre propagation.
Źródło:
Geological Quarterly; 2005, 49, 1; 31--44
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zachodni i południowy zasięg kratonu wschodnioeuropejskiego
Western and southern extent of the East European Craton
Autorzy:
Mizerski, W.
Stupka, O.
Powiązania:
https://bibliotekanauki.pl/articles/2074377.pdf
Data publikacji:
2005
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
platforma wschodnioeuropejska
platforma scytyjska
geotektonika
Ukraina
East European Platform
geotectonics
Scythean Platform
Polska
Ukraine
Opis:
The problem of the western and southern borders of the East European Platform is still subject to debate; different authors variously put this border on the geological maps of Europe. The deepness of the crystalline basement between the T–T zone and the Variscan orogen and within the so-called Scythian Platform makes recognizing the geotectonic structure of the area difficult. There are relatively few and small regions with rocks older than Mesozoic. There is no direct access to Precambrian strata over most of the area. Most structural information is provided by geophysical methods, but they do not allow to date the age of consolidated basement. The paleomagnetic studies of the area give equivocal results. Our analysis of available materials from between the T–T zone and the Variscan orogen and the Scythian Platform suggests that the Precambrian Platform has a larger extent than it was generally assumed. The platform extends westwards even as far as the front of the Variscan orogen, and to the SWand S it may reach the Alpine folded structures.
Źródło:
Przegląd Geologiczny; 2005, 53, 11; 1030-1039
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Korelacja litostratygraficzna ordowiku rejonu Biłgoraj-Narol z równowiekowymi osadami sąsiednich obszarów brzeżnej strefy kratonu wschodnioeuropejskiego Polski i Ukrainy
Lithostratigraphical correlation of the Ordovician in the Bi3goraj-Narol area with deposits of the adjacent regions of the marginal zone of the East European Craton in Poland and Ukraine
Autorzy:
Drygant, D.
Modliński, Z.
Szymański, B.
Powiązania:
https://bibliotekanauki.pl/articles/2074471.pdf
Data publikacji:
2006
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
ordowik
litostratygrafia
korelacja litostratygraficzna
Biłgoraj-Narol
Ordovician
lithostratigraphy
lithostratigraphic correlation
lithology
palaeogeography
Biłgoraj-Narol area
Opis:
Presented is an attempt to correlate the Ordovician formal lithostratigraphic units of the Biłgoraj-Narol area with their counterparts in the adjacent regions of the marginal zone of the East European Craton in the territories of Poland and Ukraine. The comparison embraces profiles of 8 structural units representing various palaeogeographical environments, with different structure and facies. They differ in degree of drilling status as well. In the area of Poland these are: the Baltic Basin, the Łysogóry Unit of the Holy Cross Mts and the Lublin area. In Ukraine the comparison embraced: the Lviv Basin, the Carpathian Foredeep, the substratum of the Carpathians and the Volhynia and Podolia. The paper does not deal with the isochronous deposits known from the substratum of the Warsaw Basin and the Podlasie-Brest Basin
Źródło:
Przegląd Geologiczny; 2006, 54, 3; 219-227
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geochemical composition of Vistulian loess and micromorphology of interstadial palaeosols at the Kolodiiv site (East Carpathian Foreland, Ukraine
Autorzy:
Łącka, B.
Łanczont, M.
Madeyska, T.
Boguckyj, A.
Powiązania:
https://bibliotekanauki.pl/articles/2059503.pdf
Data publikacji:
2007
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Ukraine
Late Pleistocene
palaeosols
loess
micromorphology
geochemistry
Opis:
This paper summarizes geochemical and palaeopedological investigations of the Upper Pleistocene loess-palaeosol sequences at the Kolodiiv site. The Kolodiiv 2, 3 and 5 profiles were selected for this study. The Kolodiiv 2 profile contains loesses, interglacial (Eemian) and interstadial (Vistulian) palaeosols. A set of Early Vistulian soils over lying Eemian gyttja and peat is exposed in the Kolodiiv 3 and 5 profiles. The mineral composition of the 50-2 mm silt fraction was analysed using non-oriented powder samples by means of X-ray dif - fraction. The total concentrations of nine major (Si, Ti, Al, Fe, Mn, Mg, Ca, K and Na) and nine trace elements (Zn, Pb, Ni, Rb, Cr, Sr, Ba, Co, V) as well as the humus content and loss on ignition were measured. The major elements concentrations in mineral deposits from the Kolodiiv 2 loess-palaeosol sequence indicate that the loess particles were derived from poorly weathered source rocks that have under - gone at least one sedimentary cycle. Climatic conditions have strongly in fluenced the mobilization and accumulation of elements in the palaeosol horizons due to the changes in the intensity of weathering and pedogenic processes. For the micromorphological study, ten samples from the Kolodiiv 3 and 5 profiles were used. Thin sections representing the Kolodiiv and Dubno set of palaeosols from Early Vistulian and Middle Pleniglacial show, be sides palaeopedologic characteristics, significant evidence of redeposition of sediments and soils.
Źródło:
Geological Quarterly; 2007, 51, 2; 127-146
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heavy minerals in the key Late Pleistocene loess-palaeosol section at Kolodiiv (East Carpathian Foreland, Ukraine)
Autorzy:
Racinowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/2059497.pdf
Data publikacji:
2007
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Ukraine
Late Pleistocene
loess
palaeosols
heavy minerals
Opis:
Successions of loess and other deposits in the Kolodiiv profile, formed during the Eemian Inter glacial and Vistulian Glacial (OIS 5-2), are characterized using the results of heavy mineral analysis. Weathered local carbonate rocks and fluvial deposits (Wartanian Glacial, OIS 6) are used for comparison. It was found that the content of minerals derived from weathered and redeposited Carpathian Flysch increases from bottom to top of the profile. The entire loess succession accumulated under similar lithodynamic conditions and the palaeosols are of similar character.
Źródło:
Geological Quarterly; 2007, 51, 2; 185-188
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High-resolution terrestrial archive of climatic oscillations during Oxygen Isotope Stages 5-2 in the loess-palaeosol sequence at Kolodiiv (East Carpathian Foreland, Ukraine)
Autorzy:
Łanczont, M.
Boguckyj, A.
Powiązania:
https://bibliotekanauki.pl/articles/2059498.pdf
Data publikacji:
2007
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
East Carpathian Foreland
last interglacial/glacial period
loess
palaeosol
organic deposits
Opis:
The Kolodiiv section is situated in the central part of the East Carpathian Fore land, on the right bank of the Sivka River, the Carpathian tributary of the Dniester River. This paper summarizes investigations on the loess deposit succession representing the Late Pleistocene, which is subdivided by several interstadial palaeosols and is bracketed by the last interglacial soil/organic deposits and Holocene soil. The Kolodiiv loess-palaeosol sequence provides an excellent high-resolution terrestrial archive of changing climate during OIS 5-2 in the East Carpathian Fore land and forms the basis for a regional pedo- and loess stratigraphy. The stratigraphic scheme was constructed on the basis of palaeosol occurrence, lithological variation in the deposits, and also the results of TL dating and palaeomagnetic in vestigations. The exposure at Kolodiiv contains an archaeological site with Middle Palaeolithic materials. Four types of palaeopedological taxa have been distinguished within the loess deposit at Kolodiiv: an interglacial (Eemian) soil unit, which includes one or two soil-forming episodes; interstadial palaeosols, which include two weaker soil-forming episodes; thin interstadial two-horizonpalaeosols; monogenetic incipient palaeosols. Palaeosols from the first and second group form the Horohiv soil unit correlated with OIS 5. Palaeosols from the third and fourth group occur as different soil types within the Dubno 1 and 2 units, which correspond to OIS 3.
Źródło:
Geological Quarterly; 2007, 51, 2; 105-126
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molluscs in Eemian-Vistulian deposits of the Kolodiiv section, Ukraine (East Carpathian Foreland) and their palaeoecological interpretation
Autorzy:
Alexandrowicz, W.P.
Dmytruk, R.
Powiązania:
https://bibliotekanauki.pl/articles/2059489.pdf
Data publikacji:
2007
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Ukraine
Halye Basin
Vistulian
loess
molluscan assemblages
Opis:
A profile of loess several metres thick with palaeosoils, underlain by calcareous gyttja, out crops in Kolodiiv, Ukraine. Rich and diverse assemblages of molluscs have been found in these deposits. Three types of mollusc communities can be distinguished. The oldest is dominated by freshwater taxa and corresponds to calcareous gyttja of Eemian age. The next two assemblages contain only snails typical of loess. The first of these indicates a cold and dry climate and open environment of arctic steppe type, with rapid accumulation of loess; the second assemblage represents a cold and humid climate and a relatively moist, open environment of tundra type.
Źródło:
Geological Quarterly; 2007, 51, 2; 173-178
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mousterian artifacts from the unique Vistulian loess-palaeosol sequence at Kolodiiv (East Carpathian Fore land, Ukraine)
Autorzy:
Sytnyk, O.
Boguckyj, A.
Łanczont, M.
Powiązania:
https://bibliotekanauki.pl/articles/2059492.pdf
Data publikacji:
2007
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Dniester region
Middle Palaeolithic
bifacial techniques
Opis:
The remains of a Mousterian cultural layer were found on the solifluction horizon at kolodiiv, Ukraine, separating two Early Vistulian palaeosols. The geological position of the finds and the typological characteristics of the assemblage allow us to refer this site to the bifacial techniques of the "East-Micoquian Route of Development".
Źródło:
Geological Quarterly; 2007, 51, 2; 189-192
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Palaeomagnetic studies of the loess-palaeosol sequence from the Kolodiiv section (East Carpathian Foreland, Ukraine)
Autorzy:
Nawrocki, J.
Boguckyj, A.
Łanczont, M.
Powiązania:
https://bibliotekanauki.pl/articles/2059494.pdf
Data publikacji:
2007
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Western Ukraine
Kolodiiv
loess
Upper Pleistocene
palaeomagnetism
Opis:
The Upper Pleistocene loess-palaeosol sequence from the Kolodiiv section (East Carpathian Fore land) has been palaeomagnetically studied. Almost all samples displayed moderate to high positive palaeomagnetic inclinations and declinations en closed between 320° and 40°. How ever, one sample from the fossil soil of the last inter glacial pedocomplex (at 16.6 m pro file depth) was reverse magnetized and there fore can be correlated with the Blake Palaeomagnetic Event. Consequently that palaeosol can be related to (Oxygen Isotope Stage) OIS 5e1. An other sample from the Dubno 1 interstadial palaeosol demonstrated southern declination and significant lowering of inclination (up to 40°). This might be a record of the Laschamp Palaeomagnetic Event or of any Late Pleistocene palaeomagnetic excursion. The magnetic susceptibility and anhysteretic remanent magnetization data reflect the presence of several soils forming during the warm conditions of OIS 5 and the complex nature of the Eemian warming. Two palaeosols that developed between ca.115 ka and 120 ka indicate at least two climatic optima during the Eemian. High values of magnetic susceptibility (up to 300 Ą 10-6 SI units) noted in the middle of the section that contains slump deposits (9.5 m to 11m of depth) suggest that this material was derived from older soils of inter glacial type.
Źródło:
Geological Quarterly; 2007, 51, 2; 161-166
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sedimentary environments of the Late Pleistocene terrestial deposits at Kolodiiv (East Carpathian Foreland, Ukraine) in the light of elementary and aggregate grain-size composition
Autorzy:
Seul, C.
Powiązania:
https://bibliotekanauki.pl/articles/2059495.pdf
Data publikacji:
2007
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Kolodiiv
loess
aggregate grain-size
elementary grain-size
Opis:
The results of grain-size analysis of silt deposits from the Kolodiiv site are presented. The seven profiles examined are situated on the terrace of the Sivka River, along a ca. 1 km stretch of its right bank. They comprise Wartanian alluvial sands and gravels over lain by Eemian deposits and Vistulian loess. The average results of aggregate and elementary analyses of selected stratigraphic units, standard grain-size in dices, and some aggregation indices are shown. The results obtained indicate that initial loess material deposited in Kolodiiv was generally not differentiated. Only the youngest palaeosols and the younger loess deposits are enriched in silt, which may suggest lower velocities of wind transporting the material or a change in source material (e.g. from sandy-silty flood sediments to clayey lacustrine sediments). Some changes in source material, transportation force or redeposition of material (e.g. by slope processes) may be deduced from the variable skew ness and flat ness of the grain-size distribution, both aggregate and dispersion.
Źródło:
Geological Quarterly; 2007, 51, 2; 179-184
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
True and anomalous TL dates from Late Pleistocene loess-palaeosol deposits at the Kolodiiv site (East Carpathian Fore land, Ukraine)
Autorzy:
Kusiak, J.
Powiązania:
https://bibliotekanauki.pl/articles/2059491.pdf
Data publikacji:
2007
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
TL dating
total-bleach method
loess
palaeosols
Opis:
Twenty-five samples were selected from the Kolodiiv site (7 profiles) for total-bleach thermoluminescence dating. Only about 50% of the TL ages corresponded well to the age expected on the basis of geological interpretation. The rest of the TL dates are over estimates. The discrepancies between the TL age and the geological age of the deposits probably resulted from the presence of an admixture of poorly bleached material, of local origin, transported over a very short distance.
Źródło:
Geological Quarterly; 2007, 51, 2; 167-172
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vistulian litho- and pedosedimentary cycles recorded in the Kolodiiv loess-palaeosol sequence (East Carpathian Foreland, Ukraine) determined by laser grain-size analysis
Autorzy:
Frankowski, Z.
Łanczont, M.
Boguckyj, A.
Powiązania:
https://bibliotekanauki.pl/articles/2059502.pdf
Data publikacji:
2007
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
loess
palaeosols
grain size
statistical indices
Opis:
In the Kolodiiv site, occur ring in the valley of the Sivka River (tributary of the Dniester River, Ukraine), Vistulian loess forms a subaerial cover over the Pleistocene terrace II. This terrace consists also of Eemian deposits (palaeosol or organic sediments) under lain by an alluvial succession of Wartanian age. The Kolodiiv 2 profile was studied in detail in order to reconstruct the conditions of loess accumulation, and consequently the climatic-environmental changes, that took place in this region. Eight lithogenetic units were distinguished in the profile: five trans formed by pedogenesis, and three loess beds. The main purpose of this study was to conduct a thorough examination of the units lithology, in particular the grain-size distribution, in order to investigate those loess-forming factors that are influenced by environmental changes (i.e. nature of source material, distance and dynamics of transport, type of deposition and redeposition, and hypergenetic processes). To achieve this, 174 samples were taken at 10 cm spacings along the profile, and the grain-size distributions of the deposits were determined using a laser method with 21 grain-size intervals examined in each sample and statistically analyses. Statistical analysis included: calculation of the main grain-size parameters (according to Folk and Ward's method), grain-size index (Ding etal., 1994) and also two statistical tests (Kolmogorov-Smirnov and Spearman rank correlation) applied in order to find differences or similarities between the grain-size distributions of the lithogenetic units distinguished. Stratigraphic variations in grain-size distribution reflect the division of the deposits into stratigraphic units previously arrived at. Mean values of grain-size index (Igs1) indicate that loess units 2, 4 and 6, differ from the palaeosol units 3, 5 and 7. The grain-size distribution of loess deposits in the Kolodiiv 2 profile varies, with marked dominance of the silt fraction, which indicates that these deposits were trans ported by winds of similar velocities carrying material a short distance from source. As the Aeolian conditions that formed loess deposits in the Kolodiiv 2 profile were generally stable, differences in the grain-size distribution of unit 2 representing the Upper Pleniglacial, suggest three cycles of loess deposition during that interval (with the middle cycle characterized by the most distinct, short-term oscillations in environmental dynamics). The variability in grain-size distribution in units 3-5, which to get her represent the Interplenivistulian (Middle Pleniglacial), reflects the climatic heterogeneity of this period. The palaeosol layers are diamictic. Higher values of grain-size indices show that all Upper Pleistocene palaeosol units of high (interglacial) and low (interstadial) rank are characterized by higher content of fine relative to coarse fraction the lowest mean values of grain-size index occur the soil unit 1, of Holocene age, suggests that this unit is probably a product of very recent, Neoholocene pedogenesis and does not represent the en tire Holocene epoch. The statistical tests results show, great similarity between loess units 2 and 4 (from the middle and upper part of the Pleniglacial), and also between palaeosol units 7 and 8 forming the Horohiv slpalaeosol unit (an Eemian palaeosol and interstadial palaeosols from the Early Vistulian). Further more, the individual nature of loess unit 6, deposited during the Lower Pleniglacial, seems to be associated with the climatic characteristics of this interval.
Źródło:
Geological Quarterly; 2007, 51, 2; 147-160
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tree-like pines on the Mshana peat bog in the Gorgany Mountains: a trace of Pinus uliginosa migration in the east Carpathians?
Autorzy:
Boratynska, K
Sulikowska, A.
Iakushenko, D.M.
Jasinska, A.K.
Sobierajska, K.
Powiązania:
https://bibliotekanauki.pl/articles/57562.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
pine
Mshana peat bog
Gorgany Mountains
Ukraine
Pinus uliginosa
Pinus mugo
Pinus uncinata
Pinus sylvestris
needle
cone
morphology
variability
taxonomy
migration
Carpathians Mountains
Opis:
The taxonomic position of the population of tree-like, mostly polycormic individuals of pines from the Mshana peat bog in the Gorgany Mountains (East Carpathians, Ukraine) has been studied on the basis of the morphological characteristics of cones and needles, and anatomical characteristics of the needles. These features have been compared with the surrounding Pinus mugo population as well as P. uliginosa, P. mugo, P. sylvestris and P. uncinata from natural populations of the taxa. Tree-like individuals were found to have the most similar needles to P. uliginosa, but most similar cone characteristics to P. mugo. It was concluded, that the tree-like population has a relic character and can present the trace of the early migration of P. uliginosa from the West and its hybridisation with P. mugo.
Źródło:
Acta Societatis Botanicorum Poloniae; 2010, 79, 2; 129-137
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cambrian organic microfossils at the border area of the East- and West-European platforms (SE Poland and western Ukraine)
Autorzy:
Jachowicz-Zdanowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/191451.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
Cambrian
palynology
acritarchs
stratigraphy
SE Poland
West Ukraine
Opis:
This paper contains palynological and stratigraphical characteristics of the selected Cambrian sections encountered in the basement of the north-eastern part of the Carpathian Foredeep and the Outer Carpathian margin in south-eastern Poland and western Ukraine, as well as verification of the stratigraphical position of rocks recognised so far in several sections in western Ukraine. The acritarch assemblages of the Cambrian System Series 2 are dominated by species of the characteristic early Cambrian genus Skiagia. The Cambrian Series 3 beds are documented by the assemblages with numerous specimens of the Adara alea, Cristallinium cambriense, Heliosphaeridium notatum, Eliasum llaniscum, Multiplicisphaeridium martae, and Comasphaeridium longispinosum. Furongian sediments are evidenced by strongly taxonomically diversified assemblages with large quantities of acritarchs, containing genera Timofeevia, Vulcanisphaera, Ninadiacrodium, Pirea, Leiofusa, Lusatia, or Polygonium, as well as taxa characterized by diacrodial symmetry. These assemblages are dominated by such genera, as: Dasydiacrodium or Acanthodiacrodium, and also by specimens with large polar opening of the central body, belonging to acritarchs of the “galeate” group. Within the studied Cambrian sediments, nine acritarch assemblages of differing composition were distinguished. These assemblages were correlated with faunistic zones. Ages younger than Palaeozoic, identified in some of the analysed Ukrainian sections, were determined basing on very well preserved assemblages of spores and pollen.
Źródło:
Annales Societatis Geologorum Poloniae; 2011, 81, No 3; 241-267
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Facies of the Upper Jurassic–Lower Cretaceous sediments in the basement of the Carpathian Foredeep (western Ukraine)
Autorzy:
Krajewski, M.
Król, K.
Olszewska, B.
Felisiak, I.
Skwarczek, M.
Powiązania:
https://bibliotekanauki.pl/articles/191397.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
microfacies
Upper Jurassic
Lower Cretaceous
SW margin of the East-European Platform
Carpathian Foredeep basement
Western Ukraine
Opis:
The Upper Jurassic–Lower Cretaceous carbonate sediments developed in a narrow, Ukrainian part of the basement of the Carpathian Foredeep show high facies diversity. Based upon thin section studies, the authors identified eleven principal microfacies varieties. Three main stages of development of carbonate platform were distinguished: (i) Oxfordian–Early Kimmeridgian, (ii) Kimmeridgian–Tithonian, and (iii) Berriasian–Valanginian. The Oxfordian sediments are rather thin and represent both the outer and inner, distally steepened ramp facies. In the Late Kimmeridgian and, mainly, in the Tithonian, the intensive growth of rimmed platform took place with distinct zones of peritidal, margin barrier and platform slope, bearing calciturbidite facies. Development of the rimmed platform was controlled by synsedimentary tectonic movements along faults rejuvenated southwest of the Holy Cross Mts. Fault Zone. In the Berriasian–Valanginian, the dominant process was sedimentation onto not-rimmed platform controlled by small sea-level changes. Both the facies development and literature data indicate that the Late Jurassic sedimentation in the Ukrainian part of the Carpathian Foredeep basement shows considerable differences in comparison to that of the Polish part. In the studied successions, large Oxfordian microbial-siliceous sponge reef complexes, known from the Polish part of the Carpathian Foredeep basement and other areas in Europe, were rare. In the study area carbonate buildups were encountered mainly in the intervals representing the Upper Kimmeridgian–Tithonian where small, microbial-sponge and microbial-coral biostromes or patch-reefs were formed. Their growth was presumably restricted to a narrow zone of the upper slope, close to ooidal-bioclastic margin platform facies. In the Polish part of the Carpathian Foredeep basement, the Late Jurassic sedimentation took place on a vast, homoclinal ramp while in the Ukrainian part it proceeded on a narrow, distally steepened ramp and rimmed platform with distinct marginal platform barrier. Similar platform facies distribution in both regions appeared mainly in the Early Cretaceous, although with some stratigraphical differences. The facies distribution of the Upper Jurassic sediments was closely controlled by the block structure of the basement and by orientation of the main, transcontinental Holy Cross Mts. Fault Zone, which supports the opinion on its activity in the Mesozoic era. The Ukrainian part of the Carpathian Foredeep basement located over the Palaeozoic Kokhanivka Block, between the Krakovets and Holy Cross fault zones, includes predominantly the slope, marginal and inner platform facies. Facies observed over the Palaeozoic Rava Ruska Block (south-western part of the East-European Platform), between the Holy Cross and Rava Ruska fault zones, represents mainly the inner platform and the peri-shore deposits.
Źródło:
Annales Societatis Geologorum Poloniae; 2011, 81, No 3; 291-307
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 67

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