Fluvial sedimentation of sandy deposits of the Słupiec Formation (Middle Rotliegendes) near Nowa Ruda (Intra-Sudetic Basin, SW Poland)

• Autorzy: Kurowski L.
• Języki publikacji: EN

Abstrakty

EN

The sandy sediments described in this paper are the lower, approximately 400-meter-thick part of the Słupiec Formation, which is part of lower Permian clastic deposits in the Intra-Sudetic Basin. At their base, the sandy deposits of the Słupiec Formation are bounded by fine-grained lacustrine sediments known as the Upper Anthracosia Shale (Krajanów Formation); upwards, they pass into the Walchia Shale (the upper part of the Słupiec Formation), also regarded to be of lacustrine origin. These sandstones consist chiefly of sublithic to subarkosic arenites and wackes. In places, polymictic conglomerates and fine-grained sediments, and also sublithic to subarkosic mudstones occur. These sediments form a structurally varied facies assembly, presumably fluvial in origin. An analysis of the vertical sequence of lithofacies revealed a distinct tendency towards the formation of simple cyclical sequences with the grain fining upwards and with a distinctly expressed asymmetry in favour of 'high-energy' medium- and coarse-grained facies. The oscillation tendency was marked only in 'low-energy' fine facies, which are sparsely represented in the sequence. The paleochannel analysis yielded results compatible with the outcome of the lithofacies analysis. The paleochannels are very shallow in relation to their width, and have a planar, erosional bottom configuration, and in places a terrace bank morphology. The fluvial system features described here may indicate a terminal fan environment as the possible depositional location place of the Słupiec Formation sandy sediments. The source areas were located at the S and SE margins of the Intra-Sudetic Basin, and the flow was towards the W and NW towards its centre, to shallow inland basins, probably of a playa type. The red colour of the sediments may be indicative of arid or semi-arid climatic conditions in this environment during the Middle Rotliegendes .

Słowa kluczowe

EN

arid climate; lithofacies analysis; fluvial environment; terminal fan; palaeochannel; Sudetes

• Wydawca: Instytut Nauk Geologicznych PAN ; Instytut Nauk Geologicznych Uniwersytetu Wrocławskiego
• Czasopismo: Geologia Sudetica
• Rocznik: 2004
• Tom: Vol. 36
• Strony: 21--38
• Opis fizyczny: Bibliogr. 25 poz.

Twórcy

autor

Kurowski L.

• Institute of Geological Sciences, University of Wrocław, Pl. Maksa Borna 9, 50-204 Wrocław, Poland,

Bibliografia

• ALLEN, J. R. L., 1965. A reviev of the origin and characteristics of recent alluvial sediments. Sedimentology, 5: 89–191.
• ALLEN, J. R. L., 1984. Sedimentary Structures – Their Character and Physical Basis. Elsevier, Amsterdam; pp. 663.
• COLLINSON, J. D., 1986. Alluvial Sediments. In: Reading, H. G. (Ed) Sedimentary Environments and Facies. Blackwell, Oxford: 20–62.
• COSTELLO, W. R. & SOUTHARD, J. B., 1981. Flume experiments on lower - flow - regime bed forms in coarse sand. Journal of Sedimenary Petrology., 51: 849–864.
• DATHE, E., 1904. Erläuterungen zur geologischen Karte Blatt Neurode. Königlichen Preussen Geologischen Landesanstalt und Bergakademie, pp. 136.
• DON, J., 1961. Utwory młodopaleozoiczne okolic Nowej Rudy. [Lower Paleozoic sediments in the vicinity of Nowa Ruda]. Zeszyty Naukowe Uniwersytetu Wrocławskiego., Seria B, Nr 6. Nauki Przyrodnicze, Nauka o Ziemi III: 3–54.
• DZIEDZIC, K., 1961. Utwory dolnopermskie w niecce śródsudeckiej. [Lower Permian sediments in the Intra-Sudetic Basin]. Studia Geologica Polonica, 6: 5–121.
• FRANKE, W., 1989. Tectonostratigraphic units in the Variscan belt of central Europe. Geological Society of America., Special Papers, 230: 67–90.
• HARMS, J. C., SOUTHARD, J. B., SPEARING, D.R. & WALKER R.G., 1975. Depositional environments as interpreted from primary sedimentary structures and stratification sequences. Society of Econom. Paleontologists & Mineralogists. Short Course, No 2: 1–161.
• HEIN, F. J. & WALKER, R. G., 1977. Bar evolution and development of stratification in the gravelly braided Kicking Horse River, British Columbia. Canadian Journal of Earth Sciences., 14: 562–570.
• KELLY, S. B. & Olsen, H., 1993. Terminal fans – a review with reference to Devonian examples. Sedimentary Geology, 85: 339–374.
• MASTALERZ, K. & RACZYŃSKI, P, 1993. Litostratygrafia i ewolucja basenu północnosudeckiego w karbonie i permie. [Lithostratigraphy and evolution of the North-Sudetic Basin during the Carboniferous and the Permian]. II Krajowe Sympozjum Sedymentologów. Przewodnik. Instytut Nauk Geologicznych Uniwersytetu Wrocławskiego: 90–108.
• MIALL, A. D., 1978: Lithofacies types and vertical profile models in braided river deposits: a summary. In: Miall, A. D. (Ed.) Fluvial Sedimentology. Canadian Society of Petrology & Geology Memoirs, 5: 597–604.
• MIALL, A. D., 1985. Architectural – Element Analysis: A New Method of Facies Analysis Applied to Fluvial Deposits. Earth – Science Reviews, 22: 261–308.
• NEMEC, W., 1981. Modele Markowa w zastosowaniach geologicznych: 1. Podstawy teoretyczne i zarys metody. 2.Przykłady z rejonu monokliny przedsudeckiej. [Geological applications of the Markov Models: 1. Theoretical back- ground and a method outline. 2. Examples from the Fore- Sudetic Block]. Acta Universitatis. Wratislaviensis., 521, Prace. Geologiczno-Mineralogiczne, VIII: 3–50.
• NEMEC, W., PORĘBSKI, S. J. & TEISSEYRE, A. K., 1982. Explanatory Notes to the Lithotectonic Molasse Profile of the Intra-Sudetic Basin, Polish Part. Veröffentlichungen des Zentralinstituts fur Physik der Erde. Akademie der Wissenschaften der DDR, Potsdam, 66: 267–278.
• PETRASCHECK, W., 1922. Zur Entstehungsgeschichte der sudetischen Karbon und Rotliegendablagerungen. Zeitschrift der Deutschen Geologischen Gesellschaft, 74, pp. 342.
• POWERS, M. C., 1953. A new roundness scale for sedimentary particles. Journal of Sedimentary Petrology, 23: 117–119.
• RADOMSKI, A. & GRADZIŃSKI R., 1978. Lithologic sequences in the Upper Silesia Coal Measures (Upper Carboniferous, Poland). Rocznik Polskiego Towarzystwa Geologicznego, 48: 194–210.
• RUST, B. R., 1978. Depositional models for braided alluvium. In: Miall, A. D., (Ed.): Fluvial Sedimentology. Canadian Society of Petrology & Geology Memoirs., 5: 605–625.
• SAWICKI, L., 1995. Geological map of Lower Silesia with adjacent Czech and German territories (without Quaternary deposits), 1:100 000. Panstwowy Instytut Geologiczny. Warszawa.
• SCUPIN, H., 1922. Die Gliederung des nordsudetischen Rotliegenden auf klimatischer Grundlage. Zeitschrift der Deutschen Geologischen Gesellschaft, 74: 263–275.
• STEEL, R. J. & THOMPSON, D. B., 1983. Structures and textures in Triassic braided stream conglomerates (“Bunter” Pebble Beds) in the Sherwood Sandstone Group, North Staffordshire, England. Sedimentology, 30: 341–367.
• TEISSEYRE, H., 1948. Sprawozdanie z prac geologicznych wykonanych w Sudetach w roku 1947. [Report on geological investigations performed in the Sudetes in 1947]. Badania fizjograficzne nad Polską zachodnią. 1: 5–47.
• ZINGG, T., 1935. Beiträge zur Schottenanalyse. Schweizerische Mineralogische und Petrographische Mitteilungen.,15: 39–140.