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Tytuł:
Geology and resources of salt deposits in Poland: the state of the art
Autorzy:
Czapowski, G.
Bukowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/2059028.pdf
Data publikacji:
2010
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Polska
Badenian
Zechstein
salt deposits
Opis:
Rock salt occurs in Poland (Central Europe) in two salt-bearing formations of upper Permian (Zechstein) and Neogene (Middle Miocene, Badenian Stage) age, while potash salts are only of Permian age. The total resources of rock salt are >106 X 10981 X 109669
Źródło:
Geological Quarterly; 2010, 54, 4; 509-518
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bryozoans (trepostomes and fenestellids) in the Zechstein Limestone (Wuchiapingian) of the North Sudetic Basin (SW Poland : palaeoecological implications
Autorzy:
Hara, U.
Słowakiewicz, M.
Raczyński, P.
Powiązania:
https://bibliotekanauki.pl/articles/2060558.pdf
Data publikacji:
2013
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
bryozoans
Late Permian
Zechstein
taxonomy
ecology
Opis:
A recently investigated Zechstein Limestone (Ca1, Wuchiapingian) bryozoan fauna from the Polish part of the Southern Permian Basin (SW Poland) is dominated volumetrically and taxonomically by fenestellids. In total six species from five genera are recognized, comprising two species of trepostomes belonging to Dyscritella Girty, 1911 and four fenestellids attributed to Kingopora Morozova, 1970, Kalvariella Morozova, 1970, Acanthocladia King, 1849 and Spinofenestella Termier and Termier, 1971. The greatest biodiversity of the bryozoans in the Ca1 profiles studied is within the slope facies where large, fan-shaped and funnel-shaped reticulate fenestellid colonies up to 10 cm high dominate. In contrast, bryozoans in the marginal (proximal) parts of the basin mostly comprise trepostomes, represented by encrusting plate-like or coil-shaped colonies of Dyscritella Girty, and commonly broken branched colonies of Acanthocladia King. The changes in the biotic composition of the bryozoans and the presence of a dominant colony growth form in the stratigraphical profile of the Ca1 reflect the depositional environment and water energy. These factors stimulate the successive stages of the development of the biota and their settlement, marked by the rich productid-fenestellid assemblages typical of the offshore setting, with the maximum depth in the middle part of the Ca1 in the Grodziec Syncline. The proximal tempestites and foreshore facies of the upper part of the Ca1 (Leszczyna Syncline) terminate the sedimentary cycle of the Ca1, with the remnant, broken bryozoans of Acanthocladia and fenestellids. The relationship between the taxonomic composition, colony growth-patterns, associated biota, and sedimentary structures points to slow sedimentation rate on slope and basin floor of the Ca1 carbonate platform. The fenestellids which are dominated in the studied biota by the reticulate and pinnate colonies of Spinofenestella, Kingopora, Kalvariella and Acanthocladia mark a close palaeogeographical link with the Zechstein (Ca1) bryozoans of Great Britain, Germany and the southern Baltic region.
Źródło:
Geological Quarterly; 2013, 57, 3; 417--432
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sulphur and oxygen isotope signatures of late Permian Zechstein anhydrites, West Poland: seawater evolution and diagenetic constraints
Autorzy:
Peryt, T. M.
Halas, S.
Petrivna Hryniv, S.
Powiązania:
https://bibliotekanauki.pl/articles/2059022.pdf
Data publikacji:
2010
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Permian
Zechstein
marine evaporites
sulphate isotopes
Opis:
The stable oxygen and sulphur isotope ratios of 52 anhydrite samples from three Zechstein anhydrite units (Lower Anhydrite, Upper Anhydrite and Basal Anhydrite) of West Poland show d18O values vs. VSMOW in the range of 9.4 to 15.5% (mean of 12.6 š1.3%), and d34S values vs. VCDT between 9.6 to 12.6%o (mean of 11.4 š0.6%o). A generally uniform distribution pattern of both isotopic values throughout the section, although with some random variation, implies that sulphate ions were sufficiently supplied and the basin was open during sulphate deposition. There is a slight stratigraphic differentiation of both the d18O and d34S values: the highest mean values are shown by the Upper Anhydrite and the lowest average values occur in the Basal Anhydrite. The correlation between d18 O and 8 S values is statistically significant only in case of the Basal Anhydrite. A wide range of oxygen isotopic ratios (from 11.6 to 25. l%o), with only several samples having d18O values that fall within the range of late Permian seawater, have been recorded in anhydrite cements and nodules that occur in the Main Dolomite rocks. Sulphur isotope ratios of anhydrite cements (range of 7.6 to 12.9%o, average of 10.7 š1.4%o) tend to reflect the late Permian sulphur isotopic signature of sulphate in seawater. The higher ranges of d18O and d34S values of anhydrite cements and nodules in the Main Dolomite compared to the underlying and overlying anhydrites are due to diagenetic resetting. The conversion of gypsum to anhydrite (often very early and under negligible cover) evidently did not affect the primary marine stratigraphic sulphur isotope composition of the sulphate deposits.
Źródło:
Geological Quarterly; 2010, 54, 4; 387-400
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lithostratigraphic and bromine profile of the Zechstein salt series In the area of borehole M-29 of the Mogilno Salt Dome
Autorzy:
Wachowiak, J.
Powiązania:
https://bibliotekanauki.pl/articles/2192118.pdf
Data publikacji:
2015
Wydawca:
Polskie Stowarzyszenie Górnictwa Solnego
Tematy:
salt deposits
Zechstein
Late Permian
Zechstein evaporites
Zechstein stratigraphy
salt cyclothems
Mogilno salt dome
złoża soli
cechsztyn
późny perm
ewaporaty cechsztyńskie
stratygrafia cechsztynu
cyklotemy solne
wysad solny Mogilno
Opis:
The M-29 exploratory borehole and operating well is located on the Mogilno I deposit in the south-eastern section of the Mogilno Salt Dome (Fig. 2). It was drilled down to the depth of 1,751 m in 2014. The borehole penetrated the evaporites of the Upper Permian (Zechstein) and a sequence of clay-mudstone-sand formations of the Lower Triassic. 11 lithostratigraphic members of the Zechstein salt series, belonging to cyclothems PZ-2, PZ-3, and PZ-4, were separated in the core subjected to our analysis. The salt deposit of the borehole M-29 area had been formed tectonically. The borehole cuts through a deep syncline, filled with the sediments of cyclothems PZ3 and PZ4. The syncline is limited on the ceiling and floor sides by anticlines composed mainly of Na2 rock salt. As a result of the uplift of the two anticline intrusions, the salt layers became strongly folded and formed very steeply. The borehole pierces through the same members several times. Many divisions are reduced in thickness or completely wedged out. No ceiling layers of cycle PZ-4 or evaporites, being older than Older Halite (Na2), were found in the profile. As a result of halokinetic and tectonic deformations, the salt layers became extremely folded and steeply arranged. The layer dip varies from 35° to 90°, mostly 60-80°. Numerous changes of the dip angle and multiple folding are demonstrated by the fact that the borehole often penetrated the same members.
Otwór badawczo-eksploatacyjny M-29 jest zlokalizowany w południowo-wschodniej części wysadu solnego Mogilno, na złożu Mogilno I (Ryc. 2). Został on odwiercony w 2014 r. do głębokości 1751 m. Otwór nawierca ewaporaty późnego permu (cechsztynu) oraz kompleks utworów ilasto-mułowcowo- piaszczystych dolnego triasu. W analizowanym rdzeniu wydzielono 11 ogniw cechsztyńskiej serii solnej cyklotemów PZ-2, PZ-3 i PZ-4. Złoże solne w rejonie otworu M-29 jest uformowane tektonicznie. Otwór przewierca głęboką synklinę, wypełnioną osadami cyklotemów PZ3 and PZ4. Synklina ograniczona jest od stropu i spągu antyklinami, zbudowanymi głównie z soli kamiennej Na2. W wyniku wypiętrzenia tych dwóch intruzji antyklinalnych warstwy solne zostały silnie sfałdowane i zalegają bardzo stromo. Otwór przewierca kilkakrotnie te same ogniwa. Wiele wydzieleń jest zredukowanych lub całkowicie wyklinowanych. W profilu nie stwierdzono warstw stropowych cyklu PZ-4 i ewaporatów starszych niż Starszy Halit (Na2). W wyniku deformacji halokinetycznych i tektonicznych warstwy solne są silnie pofałdowane i zalegają bardzo stromo. Upad warstw waha się od 35 do 90°. Najczęściej jednak wynosi 60-80°. Otwór przewierca wielokrotnie te same ogniwa ze względu na częste zmiany kąta upadu i przefałdowania.
Źródło:
Przegląd Solny; 2015, 11; 81--97
2300-9349
Pojawia się w:
Przegląd Solny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of seismic velocity distribution on the depth imaging of the sub-Zechstein horizons in areas affected by salt tectonics: a case study of NW Poland
Autorzy:
Pietsch, K.
Marzec, P.
Niepsuj, M.
Krzywiec, P.
Powiązania:
https://bibliotekanauki.pl/articles/191765.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
seismic imaging of sub-Zechstein boundaries
velocity models for Zechstein and Mesozoic successions
halokinesis
Mid-Polish Swell
Opis:
Lateral changes in the thickness of strata and petrophysical parameters within the Zechstein succession (salt pillows and domes) can cause many problems in seismic exploration of the aeolian Rotliegend formations, which are prospective for hydrocarbons. An assessment of the influence of halokinesis on the seismic imaging of the sub-Zechstein strata in NW Poland (Obrzycko–Szamotuły area, to the SW of the Mid-Polish Swell) utilised time-to-depth conversion with different, seismic-geological models. Various, seismic velocities were used in models for the Zechstein and the Mesozoic successions, namely velocities, dependent on the thickness of particular rock successions, on their depths, and velocities, determined from seismic inversion. The results show opposite reflection patterns for the seismic section imaged in the time and depth domains. The synclinal arrangement of the strata boundaries in the depth model is represented by convex-upwards reflection events on the seismic section. The pull-up of reflection events, associated with the sub-Zechstein strata, observed on the seismic sections, is mainly a result of both the greater thickness of the Zechstein salt within the salt structures (pillows, diapirs) and the increase in velocity contrast between the salt body and the Mesozoic strata.
Źródło:
Annales Societatis Geologorum Poloniae; 2012, 82, 3; 263--277
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Strontium isotopes in the Zechstein (Upper Permian) anhydrites of Poland: evidence of varied meteoric contributions to marine brines
Autorzy:
Denison, R. E.
Peryt, T. M.
Powiązania:
https://bibliotekanauki.pl/articles/2059197.pdf
Data publikacji:
2009
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Polska
Zechstein
Late Permian
anhydrite
strontium isotopes
Opis:
Strontium isotope ratios have been determined on 74 anhydrite samples from seven borehole cores in the Polish Zechstein. Five of the borehole cores are located in the basin and isotope results from these samples show a nearly pure marine signal. Results from one borehole core, located near the Zechstein coastline that migrated through time, record a stronger, in consistent influence of continental strontium to a marine base. Intermittent meteoric influence is recorded in anhydrites from other borehole cores close to the carbonate platform that was emergent during the anhydrite deposition. Consistency of isotope values indicates a marine signal and there is a narrow range in consistent values from 87Sr/86Sr near deltasw –215 (0.70702) for the oldest anhydrites and near deltasw –205 (0.70712) for the youngest an hydrites. Comparison with a sea water 87Sr/86Sr curve based on samples in West Texas and a Permian-Triassic boundary value from China shows that the Polish Zechstein in these seven boreholes is latest Permian in age and major deposition represents a short time interval (~2 million years). Strontium isotope ratios reported by other workers indicate some of the younger Zechstein elsewhere indicate even greater continental influence is in agreement with the interpreted sedimentological set ing for those anhydrites.
Źródło:
Geological Quarterly; 2009, 53, 2; 159-166
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gypsum domes and diapirs: common features in the Zechstein (Upper Permian) of Germany
Autorzy:
Paul, J.
Powiązania:
https://bibliotekanauki.pl/articles/2060043.pdf
Data publikacji:
2014
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Gypsum diapirism
Zechstein
Werra Anhydrite
Leine Anhydrite
Germany
Opis:
The Upper Permian Zechstein Group contains three gypsum horizons of variable thickness. All of them are affected by gypsum diapirism which is not related to salt diapirism. Best areas for observations and descriptions of this phenomenon are outcrops and mining districts around the Harz Mts. The lowermost gypsum member (A1) is overlain by Main Dolomite (Ca2) of the Stassfurt Formation - dolomite showing mudstone and wackestone textures. The gypsum forms cupolas or elongate ridges up to 50 m high, several km long, and may project through its roof. Above the ridges, the Ca2 roof is thinner or completely removed by slumping and sliding. The uplift of the gypsum started very early before the carbonates were completely lithified. All the ridges strike between 90 and 120°, most likely, drawn out by tectonic forces. The Basal Anhydrite (A2) and the Main Anhydrite (A3) are overlain by rock salt and behave in the same manner. Here, too, only the upper parts of the gypsum are involved in the movements. Reasons of the uplift are high water content of gypsum, additional release of water by the conversion of gypsum to anhydrite and, last not least, bouyancy of the light gypsum mud against compact rock salt or semi-lithified carbonates.
Źródło:
Geological Quarterly; 2014, 58, 3; 521--530
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykształcenie i tektonika utworów solnych cechsztynu w wysadzie solnym Góra koło Inowrocławia w oewietle wyników kompleksowych badań geochemiczno-litologicznych w profilach wybranych otworów wiertniczych
Characteristics and tectonics of Zechstein salt rocks of the Góra salt diapir near Inowrocław on the basis of geochemical-lithological study of selected borehole sections
Autorzy:
Czapowski, G.
Tomassi-Morawiec, H.
Tadych, J.
Grzybowski, Ł.
Sztyrak, T.
Powiązania:
https://bibliotekanauki.pl/articles/2074711.pdf
Data publikacji:
2009
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
złoża solne
tektonika
cechsztyn
salt deposits
tectonics
Zechstein
Opis:
Detailed macroscopic profiling of salt cores from selected wells drilled in the Góra salt diapir (central Poland; Fig. 1, 2) and analyses of bromine content made it possible to define and characterize lithostratigraphic units of the Zechstein (Upper Permian) succession (Fig. 3, 4). Interpretation of relations between the units identified in the studied well sections allowed the first schematic reconstruction of internal structure of top part of the salt trunk (Fig. 5). The principal idea of this reconstruction is probable origin of the Góra diapir as a salt trunk with a recumbent fold at the top (Fig. 6A). Subsequent uplift of the diapir and erosion resulted in removal of significant part of younger salt deposits so only those squeezed into the salt trunk interior escaped the erosion (Fig. 6B). Models of internal structure of salt diapirs are of remarkable practical value as they facilitate proper location of the mining works (e.g. leaching wells, galleries, chambers and caverns) and prediction of possible gas and water hazards.
Źródło:
Przegląd Geologiczny; 2009, 57, 6; 494-503
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The first microfossil record of ichthyofauna from the Naujoji Akmenė Formation (Lopingian), Karpėnai Quarry, northern Lithuania
Autorzy:
Dankina, D.
Chahud, A.
Radzevičius, S.
Spiridonov, A.
Powiązania:
https://bibliotekanauki.pl/articles/2060600.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
chondrichthyans
actinopterygians
Upper Permian
Zechstein Basin
northern Lithuania
Opis:
The assemblage of rare fish microremains of chondrichthyans and actinopterygians from Upper Permian deposits in Karpénai Quarry in northern Lithuania is described in detail for the first time. The deposits are characterized as reflecting a rapid phase of deposition of the Zechstein Limestone, interpreted as on a shallow shelf above storm-wave base in a proximal part of the Polish-Lithuanian Zechstein Basin. The actinopterygian microremains are represented by various teeth and a few scales from mostly palaeonisciforms and pycnodontiforms. The chondrichthyans are represented by various eusela- chian-type scales and a tooth of ?Helodus sp. The low abundance and low species diversity of the fossil assemblages studied may be due to arid palaeoenvironments that caused locally restricted conditions at this palaeogeographical location.
Źródło:
Geological Quarterly; 2017, 61, 3; 602--610
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evidence of high-temperature rock salt transformations in areas of occurrence of borate minerals (Zechstein, Kłodawa salt dome, Poland)
Autorzy:
Toboła, T. T.
Wachowiak, J.
Powiązania:
https://bibliotekanauki.pl/articles/2059366.pdf
Data publikacji:
2018
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Zechstein
salt deposit
hydrothermal conditions
borates
fluid inclusions
Opis:
Occurrences of borate minerals in the Zechstein salt-bearing deposits of the Kłodawa salt dome (central Poland), and the manner of their development, suggest that the minerals were formed at high temperatures, that considerably exceed the temperature estimated from the thermal gradient (~180°C). Research on rock salt and potassium-magnesium salts containing congolite and boracite, respectively, are consistent with high-temperature processes of transformations affecting the salt rocks in certain sections of the salt dome. The chemical composition of, and daughter minerals occurring in, primary fluid inclusions in halite, originating from the congolite zone, indicated a very high proportion of potassium and magnesium in the brines from which the halite crystallised. The thermal transformations observed in inclusions indicate a halite crystallisation temperature exceeding 420°C. Anhydrite crystals, co-occurring with borate minerals, represent unique features as to the distribution and composition of solid and fluid inclusions. These features indicate crystallisation or recrystallisation in conditions that differed considerably from those typical of the salt dome, with the involvement of solutions of changing chemical compositions. The crystals contain multiple solid inclusions of transparent and non-transparent minerals, among which we have focused on carnallite. The relationships of carnallite with liquid and gaseous phases indicate, as in the congolite zone, migration of very highly concentrated brines with respect to potassium and magnesium, or even transport of carnallite in the form of melt (liquid). Measurements of fluid inclusion homogenization temperatures, within the range from 197.8 to 473.8°C, supported a high-temperature origin for these minerals in hydrothermal conditions.
Źródło:
Geological Quarterly; 2018, 62, 1; 134--145
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zechstein (Ca1) limestone-marl alternations from the North-Sudetic Basin, Poland: depositional or diagenetic rhythms?
Autorzy:
Biernacka, J.
Borysiuk, K.
Raczyński, P.
Powiązania:
https://bibliotekanauki.pl/articles/2059558.pdf
Data publikacji:
2005
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Zechstein
limestone-marl alternations
storm deposits
carbonate diagenesis
Opis:
Limestone-marl alternations constitute a characteristic rock facies within the Zechstein Limestone (Ca1) deposits of the North-Sudetic Basin, Poland. Rhythmites of this type are exposed in a 10-metres section at Nowy Kooeciół, which from the beginning of the last century has been considered representative for this part of the Zechstein basin, and were formerly interpreted as calcareous storm sediments alternating with marls deposited during more quiet conditions. Our results of sedimentological, petrographical and chemical studies suggest that the Nowy Kościół section is a record of distal storm deposits, but that the present-day layering does not precisely reflect the depositional rhythm. Post-depositional changes have overprinted and blurred the original pattern.We propose a model of diagenetic alteration in which dissolution and reprecipitation of calcium carbonate in the shallow subsurface formed new layer boundaries; subsequent modifications during deeper burial followed these early diagenetic changes.
Źródło:
Geological Quarterly; 2005, 49, 1; 1--14
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The isolated Wuchiapingian (Zechstein) Wielichowo Reef and its sedimentary and diagenetic evolution, SW Poland
Autorzy:
Fheed, A.
Świerczewska, A. T.
Krzyżak, A.T.
Powiązania:
https://bibliotekanauki.pl/articles/2060002.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
reef
microfacies
diagenesis
porosity
Zechstein Limestone
Wolsztyn Ridge
Opis:
The development of a relatively small and isolated part of the Wuchiapingian, Zechstein Wielichowo Reef was possible owing to a progressive subsidence and frequent sea level fluctuations. Three biofacies were distinguished within the studied object: (1) a shallow-water and highly energetic Acanthocladia biofacies, dominated by bryozoans and crinoids, with poorly preserved porosity, reduced mainly by calcite cementation and compaction; (2) the Horridonia biofacies comprising numerous brachiopods, preferring a moderate depth of water, with comparably poor porosity; and (3) the Fenestella/Kingopora biofacies rich in fossils of the highest variability, related to the deepest and calmest waters, occurring on the top of the profile and showing a significant effective porosity, reaching almost 13%. Among many diagenetic processes altering the reef, several lines of evidence suggest that it was the meteoric diagenesis to enhance its porosity the most extensively. Since no stromatolites are present, the final sea level decrease is interpreted to be rapid, hence creating conditions favourable for the meteoric dissolution. Some intraparticle porosity, however, seems to be of a depositional origin.
Źródło:
Geological Quarterly; 2015, 59, 4; 762--780
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geochemical and foraminiferal records of environmental changes during the Zechstein Limestone (Lopingian) deposition in Northern Poland
Autorzy:
Peryt, M.
Peryt, D.
Powiązania:
https://bibliotekanauki.pl/articles/2058961.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
geochemistry
Polska
carbon and oxygen isotopes
foraminifers
Zechstein Limestone
Opis:
The entire Zechstein Limestone section of the Zdrada IG 8 borehole (Northern Poland) is composed of oncoid packstone that is accompanied by stromatolites in the upper part of the unit. Deposition of the Zechstein Limestone occurred in persistently subtidal environments, above the storm wave base, in mostly dysoxic conditions, and thus these conditions did not differ essentially from those characteristic for the Kupferschiefer strata. The previous supposition of vadose diagenesis is not confirmed by the isotopic study of calcite that showed its clearly marine values (average d1318
Źródło:
Geological Quarterly; 2012, 56, 1; 187-198
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carbon isotope stratigraphy of the basal Zechstein (Lopingian) strata in Northern Poland and its global correlation
Autorzy:
Peryt, T. M.
Durakiewicz, T.
Kotarba, M. J.
Oszczepalski, S.
Peryt, D.
Powiązania:
https://bibliotekanauki.pl/articles/2058984.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Upper Permian
Zechstein
organic geochemistry
Kupferschiefer
carbon isotope stratigraphy
Opis:
The Kupferschiefer (T1) records a period of basin-wide euxinic conditions, and is thus considered an excellent time-marker in the Zechstein (Lopingian) basin. Previous studies indicated that both the Kupferschiefer and Marl Slate and the overlying Zechstein Limestone (Magnesian Limestone) show remarkable changes in carbon isotopic composition towards higher 131313131313
Źródło:
Geological Quarterly; 2012, 56, 2; 285-298
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mineralogy and geochemistry of the Tonmittelsalz (z3TM) and Tonbrockensalz (z4TS) as “zuber” equivalents in the German Zechstein (Upper Permian)
Autorzy:
Onneken, J.
Schramm, M.
Hammer, J.
Powiązania:
https://bibliotekanauki.pl/articles/2060085.pdf
Data publikacji:
2018
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
clay-bearing strata
Tonmittelsalz
Tonbrockensalz
Zechstein
zuber
North Germany
Opis:
Two main lithostratigraphic units of clay-bearing rock salt, the Tonmittelsalz of the Leine formation (z3) and Tonbrockensalz of the Aller formation (z4), occur in the German Zechstein (Upper Permian) succession. These units could be equivalents of the Brown Zuber (Na3t) and Red Zuber (Na4t) in the PZ3 and PZ4 cyclothemes of the Polish Zechstein basin. Mineralogical-geochemical investigations of the Tonmittelsalz and Tonbrockensalz were carried out on samples taken from a deep borehole in the Gorleben salt dome in Northern Germany. Even though these units are characterized by a similar mineralogical composition of mainly halite with subordinate quantities of anhydrite and clay minerals, variations in mineral content and fabric were observed. The older Tonmittelsalz rocks document some primary features like chevrons in halite crystals and idiomorphic halite crystals in clay-bearing layers. A brecciated fabric and a vague layering, shown by polarizing microscopy and CT-imaging, indicate a deformation of the younger Tonbrockensalz, which is folded in the deep borehole Go1004. Nevertheless, internal fabrics of clay clasts in the z4TS show an early brecciated and folded fabric during sedimentation or diagenesis. Main component chemistry and REE are comparable in both units, but significant differences were observed for trace element and isotope data. The z3TM rocks contain higher values of trace elements like Liand higher values in REE, while the z4TS rocks are enriched in K. Isotope data of anhydrites of both units correspond to those of the Zechstein. The δ18O values of samples from the Tonbrockensalz display a relatively large range (8.5-11.9‰) and may indicate changing conditions during its formation. In contrast, only minor variations in the δ34S of samples from the Tonbrockensalz and in both isotope compositions of samples from the Tonmittelsalz have been documented.
Źródło:
Geological Quarterly; 2018, 62, 4; 896--916
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
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