Geologia
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ISSN 0138-0974
e-ISSN: 2353-0782
Issue Date
2007
Volume
T. 33
Number
Nr 4/1
Description
Journal Volume
Geologia
T. 33 (2007)
Projects
Pages
Articles
Stratygrafia polskich Karpat fliszowych pomiędzy Bielskiem-Białą a Nowym Targiem
(Wydawnictwa AGH, 2007) Golonka, Jan; Waśkowska, Anna
Jurassic, Cretaceous, Paleogene, and Neogene allochtonous rocks of the Outer Carpathians build up the complex area between Bielsko-Biała and Nowy Targ. These deposits belong recently to the Magura, Fore-Magura, Silesian, Sub-Silesian and Skole Nappes. The present authors provided the systematic arrangement of the lithostratigraphic units according to their occurrence within the original basins and other sedimentary areas. The Magura Basin was formed in the Middle Jurassic. The deep--water sedimentation of radiolarites and carbonates dominated at the beginning, since the Late Cretaceous the flysch sedimentation prevailed. The proto-Silesian Basin developed during Late Jurassic and Early Cretaceous times with the syn-rift and post-rift formations. The Silesian, Fore-Magura, Skole Basins formed during Late Cretaceous. Fore-Silesian sedimentary area included the western end of the Sub-Silesian Ridge and slopes of the Silesian and Skole Basins. The western end of the Skole Basin is located within the investigated area. The slope deposits of the Sub-Silesian type and separated basinal flysch facies occurred there. The basins existed during Late Eocene to Early Miocene times: the remnant piggy-back Magura Basin and, in the northern part of the accretionary prism the Krosno Basin with Menilite and Krosno Formations.
Tektonika polskich Karpat fliszowych pomiędzy Bielskiem-Białą a Nowym Targiem
(Wydawnictwa AGH, 2007) Golonka, Jan
The Polish Outer Carpathians between Bielsko-Biała and Nowy Targ are built up from the thrust, imbricated Upper Jurassic - Neogene flysch deposits. The following Outer Carpathian nappes have been distinguished: Magura Nappe, Fore-Magura group of nappes, Silesian, Subsilesian and Skole Nappes. The Magura Nappe borders along Stare Bystre-Szaflary line with the Pieniny Klippen Belt. It is thrust over the Fore-Magura and Silesian nappes at least 20 km. The Skawa line system of faults displaces the Magura Nappe margin 2 km northward. The Fore-Magura narrow zone runs from Milówka to the southern slope of Beskid Mały, where disappears from the surface. The Silesian Nappe is devided into two segments along the Skawa fault. The western one is characterized by the development of Cretaceous Godula Sandstones, eastern by the occurrence of Krosno Beds. The Sub-Silesian Nappe occurs as broken pieces along the northern margin of the Silesian Nappe, as well as in the tectonic windows within the Silesian Nappe. The Skole Unit is thrust over the Miocene deposits of Carpathian Foredeep in the area north of Wadowice and Andrychów.
Analiza gęstości i porowatości z badań laboratoryjnych oraz wyników pomiarów otworowych i obliczeń w programie Estymacja w wybranych otworach w Karpatach Zachodnich
(Wydawnictwa AGH, 2007) Jarzyna, Jadwiga A.
The analysis of density and porosity changes was made for selected wells from the Western Carpathians. Laboratory data from the PITAKA database of the Polish Oil and Gas Company together with density logs and density values obtained from the <i>Estymacja</i> calculation as well as data for a few dozen samples from mercury porosimetry measurements were used. The agreement of results from different sources was observed. Data for different lithostratigraphic formations were set together for groups of wells from the same region. This enabled information to be mutually supplemented. Density characteristics of lithostratigraphic formations was used for gravity modeling. Porosity and density were employed to create generalized models of physical properties of selected lithostratigraphic formations form the Western Carpathians.
Model prędkościowy fal P i S oraz gęstości objętościowych dla wybranych otworów w rejonie Karpat Zachodnich
(Wydawnictwa AGH, 2007) Bała, Maria; Witek, Katarzyna
Elastic parameters including P-wave and S-wave velocities, their ratios, and bulk density for different lithostratigraphic levels were calculated for selected boreholes from the Western Carpathians. The calculations were made with the use of the <i>Estymacja</i> computer program written by M. Bała and A. Cichy within the research project No. 8 T12B 046 20. The theoretical Biot--Gasstnann's model was used, which enabled the above mentioned parameters to be determined based on known mineral composition, porosity, and water- and hydrocarbon saturation of rocks, which can be obtained from well log quantitative interpretation. Mean values of the parameters were put together for selected stratigraphic units and used for the evaluation of velocity model and bulk density model.
Sztuczne sieci neuronowe dla uzupełnienia danych w geofizyce otworowej - wybrane przykłady
(Wydawnictwa AGH, 2007) Jarzyna, Jadwiga A.; Opyrchał, Anna; Mozgowoj, Dariusz
Artificial Neural Networks were used for reconstruction of well logs. Transit interval time recorded during acoustic log, bulk density as a result of gamma-gamma log and apparent resistivity were reconstructed on the basis of available logs. Perceptrons were chosen and the back propagation method was applied as the most effective training algorithm. Perceptrons with a few input neurons and at least a few neurons in a hidden layer turned out in reconstructing parameters. Basic statistics calculated for the reconstructed parameters compared to the measured or estimated ones acted as measures of correctness of solutions delivered by the networks. Intervals containing rocks of complex lithology and diversified stratigraphy turned out to be the most difficult to interpret. Results were applied in seismics, gravimetric and magnetotelluric interpretations.