Wyniki wyszukiwania - BazTech

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Karbon Sudetów w świetle nowych wyników badań biostratygraficznych

Górecka-Nowak Anna, Muszer Jolanta, Maćko Adrianna

Przegląd Geologiczny

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2025

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Vol. 73, nr 9

776--783

EN

The paper presents geological implications of new results of biostratigraphic studies (mainly palynostratigraphic) of Carboniferous rocks from the central part of the Sudetes. They brought important changes in stratigraphy, most often showing younger age of studied rocks than it was believed earlier. The onset of sedimentation in the Intra-Sudetic Basin, initially in the continental environment, was not earlier than in the middle Visean. Marine sediments, previously considered to be a manifesta¬tion of the Late Viseanian transgression, were found to be diachronic (from the late Visean to the Namurian C). Among profiles of the Szczawno Formation and its lithologic equivalents that were previously considered to be Upper Visean, only two profiles: Ptasia Góra in the Intra-Sudetic Basin and Paprotnia in the Bardo Unit, represent the uppermost Visean. Most of the other profiles from the Wałbrzych region turned out to represent the Namurian A (Serpukhovian) or even Namurian B and C (Bashkirian age) in the case of some profiles in the Sowie Mountains Massif. The late Visean-early Namurian (Serpukhovian) age range also encompasses marine mudstones from the southern part of the Świebodzice Unit, which were previously considered Late Devonian. This discovery is of great importance for the model of development of the Świebodzice Unit. Consequently, the timing of the marine sedimentation in different geological units of the middle part of the Sudetes should be revised. The coal bearing rocks of the Wałbrzych Formation, analysed in the study, are of Namurian A (upper Serpukhovian and lower Bashkirian) age. The Biały Kamień Formation was included in the Namurian B and C and Westphalian A (Bashkirian), the Żacler Formation - in the Westphalian A-C (Bashkirian and Moscovian), and the Glinik Formation - in the Westphalian D(?). The documentation of successive miospore zones from VF to OT(?) indicates that there are no stratigraphic gaps in the Upper Visean-Westphalian D (?) interval in the Intra-Sudetic Basin. The problem of the chronostratigraphic significance of miospores dating the Walchia shales in the Intra-Sudetic Basin and the need to reinterpret the location of the Carboniferous/Permian boundary are also discussed.

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Wstępne wyniki badań petrologicznych i palinologicznych klastów węgla w zlepieńcach formacji menilitowej jednostki śląskiej

Wójcik-Tabol Patrycja, Górecka-Nowak Anna, Nowak Grzegorz

Przegląd Geologiczny

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2019

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Vol. 67, nr 3

200--203

EN

Coal-bearing conglomerates occur in the Menilite Formation of the Silesian Unit, outcropped in the village of Kobielnik. Coal particles are angular and differ in size (2 mm-6 cm). The examined coal shows rather predominance of vitrinite (collotelinite, collodetrinite, vitrodetrinite). However, the presence of inertinite (fusinite, semifusinite and inertodetrinite with rather accessory funginite and secretinite) is also significant. However, liptinite (sporinite, cutinite and resinite) also indicates its presence in the maceral composition. The results of both coal petrographic and palynologcal analyses were conducted with the intention of applying them to reconstruct environments of coalformation. Palynological studies revealed palynofacies consisting mainly of black palynoclasts ofrectangle or oval shape. Miospores are abundant and various in colour-from yellow to dark brown. The miospore assemblage is dominated by Lycospora and several other Carboniferous genera occur there. The presence of Radiizonates aligerens (Knox) Staplin, Jansonius, the guide species to the lower part of the Westphalian A (Langsettian) indicate that at least part of the coal pieces come from this part of the Pennsylvanian. The age position of the whole miospore assemblage should be determined as the Late Bashkirian-Moscovian (Westphalian). Additionaly, some older miospores, usually dark in colour, were found in this assemblage and they are considered as reworked.

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Palinologia dolnodewońskich i środkowodewońskich osadów klastycznych z otworu wiertniczego Trojanowice 2

Filipiak P.

Biuletyn Państwowego Instytutu Geologicznego

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2014

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nr 459

7--31

PL

Kompleksowe badania palinologiczne przeprowadzono na 37 próbkach z otworu wiertniczego Trojanowice 2, z interwału 502,0–558,8 m. Na podstawie rozpoznanych gatunków miospor wyróżniono dwa standardowe poziomy miosporowe: Emphanisporites annulatus-Camarozonotriletes sextantii z emsu oraz Grandispora douglastownense-Ancyrospora eurypterota z pogranicza emsu i eiflu. Przeprowadzone anlizy palinofacjlne pozwoliły określić środowisko sedymentacji spągowych partii profilu na morskie, bliskiego brzegu, z intensywną dostawą materiału organicznego z lądu.W części stropowej stwierdzono natomiast nieco głębsze warunki depozycji, w większym oddaleniu od obszarów źródłowych. Analiza kolorystyczna wykazała dojrzały stopień przeobrażenia termicznego materii organicznej. Formalnie opisano po raz pierwszy dwa nowe gatunki miospor: Camptozonotriletes reticulum sp.n. i Perotrilites asymmetricus sp.n.

EN

The palynological investigation were carried out on 37 samples from the Trojanowice 2 borehole from a depth interval of 502.0–558.8 m. Based on the presence of index and important microflora species two standard miospore zones were recognized: Emphanisporites annulatus-Camarozonotriletes sextantii, from the Emsian and Grandispora douglastownense-Ancyrospora eurypterota from the Emsian/ Eifelian transition interval. Palynofacies from the lower part of the section indicate marginal marine palaeoenvironmental conditions. Palynofacies from the upper part prove deeper marine conditions further from the shoreline. Additionally, spore colour analyses revealed a high degree of thermal transformation. Two new miospore taxa have been formally erected: Camptozonotriletes reticulum sp.n. and Perotrilites asymmetricus sp.n.