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EN
The aim of the study was to identify and assess the lithological features typical for alluvial sediments of Vistula River from the natural part of its course on 603 km of the river course. For this purpose, the micromorphological analysis was carried out for a sample taken from the surface of a tree covered island. The analysis is laborious, but its great advantage is that it allows to determine the detailed characteristics of undisturbed sediments, supplying other lithological studies. Examined thin section showed fractionation lamination within medium and fine sands, interbedded with coarser grains with some organic admixtures. Detailed analysis allows to detect gradual and sudden changes of discharge energy.
EN
The article presents the results of geological and geomorphological research concerning load-cast structures outcropping in the alluvial terrace sediments of theWisłok River in the Fore-Carpathian Erosional Valley. Given the large dimensions of these structures, reaching 1.5 m in some places, as well as their strong accumulation and diversity (i.e. drop-like and pocket-like structures), the authors attempted to establish the environmental factors that had determined the development of the structures in periglacial deposits of the Weichselian Glaciation. The structures were analysed in two accessible outcrops where sediments are represented by flood rhythmite and organic deposits, overlain by channel sands. Sandy load-cast structures occur in flood rhythmite and loamy deposits. The formation of load-cast structures probably started due to earthquakes in the Upper Pleniglacial period. The various shapes of load-cast structures were constrained by the various physical properties of the sediments and the escape of water during the deformation process.
PL
Na Nizinie Szczecińskiej rzeka Ina jest największym dopływem Odry. Dolna część jej doliny, między Stargardem Szczecińskim i Goleniowem, podlega częstym zalewom, w wyniku których następuje sedymentacja namułów naniesionych przez wodę. Fragment tej doliny w pobliżu miejscowości Sowno objęto badaniami, które prowadzono na dwóch transektach, przecinających w poprzek całą dolinę. Uwzględniając jej mikrorelief wyznaczono 11 powierzchni badawczych, w których wykonano 11 odkrywek glebowych. Badania wykazały, że występująca z koryta rzeki woda znacząco kształtuje mikrorzeźbę doliny oraz kierunek i przebieg procesów glebowych, w wyniku czego, niekiedy w niewielkiej odległości od siebie, spotykamy gleby różnych typów i podtypów. W badanym fragmencie doliny stwierdzono występowanie dwóch typów gleb - mad rzecznych i gleb murszowych podtypu torfowo-murszowego i namurszowego. Gleby torfowo-murszowe występują w najbardziej obniżonej części doliny, w pobliżu starych terasów akumulacyjnych, stopniowo przechodząc w mady próchniczne, a te z kolei - w środkowej części doliny - w mady brunatne, wyróżniające się dużą zawartością związków żelaza w poziomie brunatnienia. W pobliżu koryta rzeki występują mady próchniczne.
EN
The Ina River is a major tributary to the Odra River in Szczecin Lowland and the lower part of its valley between Stargard Szczeciński and Goleniów is subjected to frequent inundations resulting in sedimentation of material carried by water. This study was carried out along two transects crossing the whole valley near Sowno. Eleven study plots for collecting 11 soil profiles were selected with the consideration of microrelief of the valley. The studies showed that waters overflowing the river bed markedly shape the microrelief of the valley and the course and direction of soil processes. Therefore, a variety of soil types and subtypes occurs at a small distance from each other. Two soil types were found in the studied part of the valley: alluvial soils and muck soils of the peat-muck subtype. Peat-muck soils occur in the lowest part of the Ina valley near old alluvial terraces, gradually turning into humic alluvial soil and then into brown alluvial soil with a great accumulation of iron compounds. Humic alluvial soils prevail near the river channel.
EN
The paper presents the results of geomorphological studies and pollen analysis performed for alluvial deposits at 2 sites situated in the Wisłok River valley. The deposits consist of thin layers of organic muds filling palaeochannels or thermo-karst lakes of the Wisłok River, dated at the Interpleniglacial (Grudziądz Interstadial) of the Vistulian Glaciation. These deposits build the lower part of a sand terrace, 8-12 m high, and outliers of this terrace buried by overbank alluvial sediments within a floodplain. The samples for pollen analysis were taken from a natural undercut in the Wisłok River channel and from a sand pit dug to a greater depth. The pollen diagrams prove the existence of trees (forest-steppe) including primarily Pinus sylvestris, Betula t. alba, Pinus cembra and Larix. The diagrams do not show a clear tendency of a plant succession and thus of any distinct climate changes. The sedimentation took place under cool, boreal climate conditions. The occurrence of several layers of organic and sand deposits in the sections does not reflect rhythmic warm/cold climatic oscillations documented in the Interpleniglacial alluvial sequences in Western European rivers, but is a result of vertical channel fluctuations and facies changes.
EN
This paper presents results of absolute dating of alluvial sedimentary series forming a rendzina terrace (higher floodplain) 7-8 m high above the Wisłok River channel and a sandy terrace 8-10 m high in the Subcarpathian Pradolina section of the Wisłok River valley. The organic mud infilling fossil depressions (palaeochannels?) in the lower part of the rendzina terrace have been dated by the radiocarbon method to more than 38,500 BP. The organic series occurring within the sandy terrace yielded three ages >36,000 BP. Results of palynological analyses carried out on both sites indicate tundra or forest-tundra environments with water-filled depressions at the time of organic sediments deposition. The top of the 8-10 m high sandy terrace is built of fluvial sands and eolian cover sands with dunes in the upper-most part. Their age has been established by means of the OSL method to 11.2š0.9 ka BP. The younger alluvial inset fill is formed of sands and silts with involutions occurring under Holocene muds. They were deposited by a braided river during the Upper Plenivistulian as indicated by two other OSL dates of 22.2š2.2 ka BP and 14.0š1.5 ka BP. Within the rendzina terrace the youngest series of Vistulian age is built with peats and silts, infilling the wide depression at the foots of sandy hillocks, dated to about 11,800 BP.
PL
Oznaczenie zawartości Au w skałach kompleksu kaczawskiego metodą absorpcji atomowej (AAS) wykazuje, że najwyższe koncentracje tego pierwiastka charakteryzują skały krzemionkowe — lidyty (59 ppb) i łupki kwarcowe (16 ppb), a także keratofiry (13 ppb) i łupki grafitowe (16 ppb i 11 ppb). Natomiast zieleńce charakteryzuje niska zawartość złota ( poniżej 5 ppb). Daje się zauważyć zmienność koncentracji analizowanego pierwiastka w tego samego typu skałach (łupkach kwarcowych i łupkach grafitowych) pochodzących z różnych rejonów kompleksu kaczawskiego. Wzrost koncentracji Au jest konsekwentny od Kaczorowa przez Wojcieszów i Świerzawę do Złotoryi — miejsca występowania złota rodzimego.
EN
Analysis of gold concentration in rocks of the Kaczawa complex using the AAS method shows that the highest content of this element occurrs in silicic rocks - lidites (59 ppb) and quartz slates (16 ppb) as well as kerathofires (13 ppb) and graphite slates (16 ppb i 11 ppb). On the other hand greenstones are characterised by low content of gold (5 ppb). Gold content is variable in similar rocks (quartz slates and graphite slates) from different parts of the Kaczawa complex. It increases consequently from Kaczorów, through Wojcieszów and Świerzawa, to Złotoryja, place of native gold occurrence.
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