Geologia
Loading...
ISSN 0138-0974
e-ISSN: 2353-0782
Issue Date
2006
Volume
T. 32
Number
Nr 4
Description
Journal Volume
Geologia
T. 32 (2006)
Projects
Pages
Articles
Analiza względnych zmian wiekowych pola magnetycznego Ziemi (1966-2005) wzdłuż profilu Zgorzelec-Wiżajny
(Wydawnictwa AGH, 2006) Bojdys, Grzegorz; Grabowska, Teresa; Marchewka, Józef; Suchoń, Bogusław
The paper presents results of the studies on local relative time variations of total geomagnetic field observed along the 700 km long profile crossing the Paleozoic Platform (PLZ), Transeuropean Suture Zone (TESZ) and East European Craton (EEC). The study is a continuation of the research conducted in the years 1966-2000. Measurements of the Earth's magnetic field made in the last five years revealed a new phenomenon, which was a faster increase of the magnetic field observed at the EEC. They proved also that the dynamics of the magnetic field variations observed for the EEC was greater than it was for TESZ and PLZ. The character of geomagnetic field variations observed during the last five years caused the modification of method of studies of relative secular geomagnetic variations.
Badania geoelektryczne na przedpolu osuwiska w kopalni diabazu »Niedźwiedzia Góra« koło Krzeszowic
(Wydawnictwa AGH, 2006) Mościcki, Włodzimierz Jerzy; Antoniuk, Janusz
In the »Niedźwiedzia Góra« Diabase Quarry located near Krzeszowice (South of Poland), a big landslide occurred in the late spring 2005. Direct reasons of that event were massive rainfalls in the region. The landslide was a threat to the regular exploitation of the quarry. To protect the pit quickly and properly, there was an urgent need to explain the genesis of the landslide. A detailed geological survey was performed followed by geophysical measurements. The former included geolectric methods: DC resistivity soundings, EM profiling and earth resistivity tomography. Based on he geophysical survey, the shallow geology of the southern foreland of the quarry was established.. The possible paths of underground water flow and their relation to outflows of water observed in the landslide were indicated.
Zastosowanie geofizycznych badań elektrooporowych w rozpoznaniu morfologii antropogenicznej na przykładzie zamku błogosławionej Salomei w Grodzisku pod Skałą (Małopolska)
(Wydawnictwa AGH, 2006) Domogalla, Witold; Mościcki, Włodzimierz Jerzy
Monumental archaeological and landscape complex in Grodzisko is located within Ojcowski National Park (Małopolska province, South Poland). The complex was investigated historically and archaeologically in 60-ties and 90-ties of the XX century and lately in 2003. Results of geophysical research played an important role in planning archaeological excavations and analysis of historical events. The methods used were penetrometer-based resistivity profiling and DC resistivity imaging. The first method was used for recognition of different cultural accumulation layers within embankments of the courtyard. Resistivity imaging made along five lines located near historical church discovered distinct high-resistivity zones. These zones reflected the presence of underground fragments of historical walls confirmed later by the archaeological excavation works. Complex analysis of historical and archeological data leads to the opinion that discovered walls are remnants of the building of defense-residential character, probably one of the oldest examples of the »architectura militaris« on the area of Poland.
Wykorzystanie sejsmicznych przekrojów fal podłużnych i przemiennych do kalibracji modelu prędkości fal poprzecznych
(Wydawnictwa AGH, 2006) Marzec, Paweł ; Kobylarski, Marcin; Pietsch, Kaja
Comparisons of P and S or converted wave (C-wave) seismic sections can improve identification of seismic reservoir anomalies. In Poland, the first experimental seismic P and C-wave survey was performed by Geofizyka Kraków Ltd (under supervision of PGNiG S.A.) in the area of Chałupki Dębniańskie (Carpathian Foredeep). High diversity of physical parameters in analyzed formations, small dimensions of geological targets and a lack of experience in C-wavefield interpretation caused theoretical wavefield modeling extremely indispensable for local reservoir interpretation. A shortage of satisfactory amount of well log data, particularly S-wave velocity information, caused a determination of S-wave changeability with depth the main problem in wavefield modeling. This paper proposes a method of calibration of measured or synthetic S-wave curves based upon both the recognized P-wave velocity distribution in the profile and the registered P and C-wavefield. An effectiveness of the proposed method was confirmed by high similarity of the registered wavefield and the wavefield computed with the use of SeisMod application (Department of Geophysics, AGH UST).
Zastosowanie samoorganizujących sieci neuronowych Kohonena w klasyfikacji sejsmofacjalnej (rejon Ujkowice – Batycze)
(Wydawnictwa AGH, 2006) Dzwinel, Krzysztof; Haber, Anna; Krawiec, Dagmara
This paper presents the application of Kohonen's Self Organizing Networks in classification of seismic waveform. The classification is one of the basic elements of seismofacies analysis and it often leads to significant exploratory conclusions. Important elements of this kind of analysis are: selection of seismic attributes and usage of appropriate clustering method. There were used AVA attributes, which include information about petrophysical properties of rocks. There used two additional multi-dimensional methods to examine seismic facies distribution on selected area: classification of chosen crossplot intercept-gradient area and classification carried out by method which minimizes the product of objects distances in groups. Verification of optimal method for data classification was made based on observation of clusters shape and their characteristic due to insufficient information from wells.