|
|
Application of electric resistivity tomography in assessing odl gold mines Kometa
ŠEFČÍK, David
The aim of this diploma thesis is to test the possibility of using the geoelectrical resistivity tomography in tracing mining areas within the territory of the medieval gold-mines "Na Kometě" in the Písek Mountains and subsequently, based on the measured data, to estimate the simplified characteristics of the bedrock to a depth of 16 metres. The student will get acquainted with the basic geophysical instrument ARES as well as the basic interpretation of the data. The diploma thesis deals with basic geophysical instruments as well as with the occurrence of gold in the territory of South Bohemia. The submitted thesis has 129 pages and is divided into ten chapters.
|
|
|
Current state of geophysical research and surveys in the Czech Republic
Kaláb, Zdeněk
The basic research of the Earth's physical fields in the Czech Republic is solved by the research infrastructure CzechGeo/EPOS, which is a comprehensive system for observing geophysical fields operated by geoscience institutions in the Czech Republic. CzechGeo/EPOS is distributed multilayer research infrastructure based on acquisition and distribution of data from geophysical monitoring networks. In the area of exploratory geophysical works, the survey of potential sites for the deep repository of nuclear waste is probably the biggest topic. This is not only a survey of potential sites, but also activities at the Bukov underground laboratory. One of the major challenges facing applied geophysics in the near future is to participate in surveys for the high-speed railway line. Applications of geophysical methods are increasingly penetrating also other fields.\n
|
|
|
Geophysical Survey in Vinicity of the Church Stětí sv. Jana Křtitele in Dolní Chabry
Buneš, Josef ; Dohnal, Jiří (advisor) ; Kněz, Jaroslav (referee)
v Abstract The diploma thesis "Geophysical survey of the surroundings of the Church of the Beheading of St. John the Baptist in Dolní Chabry" describes the realized geophysical measurements at an important archaeological locality and interprets its results. The locality is approached from the historical, geographical and geological point of view. There are described physical properties of rocks, basic principles of geophysical methods used and methodology of field work and data processing. Finally, the measurement results are interpreted. The following methods were used for the research: symmetric resistivity profiling, dipole electromagnetic profiling, electrical resistivity tomography and seismic rafraction. Several anomalies corresponding to already known objects were identified and localized in the locality, another part of captured anomalies corresponds to previously unknown buried archaeological objects. Keywords: archeology, geophysics, archeogeophysics, Dolní Chabry, Church of the Beheading of St. John the Baptist
|
|
|
Geophysical Survey in Vinicity of the Church Stětí sv. Jana Křtitele in Dolní Chabry
Buneš, Josef ; Dohnal, Jiří (advisor) ; Kněz, Jaroslav (referee)
v Abstract The diploma thesis "Geophysical survey of the surroundings of the Church of the Beheading of St. John the Baptist in Dolní Chabry" describes the realized geophysical measurements at an important archaeological locality and interprets its results. The locality is approached from the historical, geographical and geological point of view. There are described physical properties of rocks, basic principles of geophysical methods used and methodology of field work and data processing. Finally, the measurement results are interpreted. The following methods were used for the research: symmetric resistivity profiling, dipole electromagnetic profiling, electrical resistivity tomography and seismic rafraction. Several anomalies corresponding to already known objects were identified and localized in the locality, another part of captured anomalies corresponds to previously unknown buried archaeological objects. Keywords: archeology, geophysics, archeogeophysics, Dolní Chabry, Church of the Beheading of St. John the Baptist
|
|
|
Evaluation of physical fields in a landscape locality
Jílek, Michael ; Králík, Martin (referee) ; Smital, Lukáš (advisor)
The thesis is focused on gathering of theoretical backgrounds for geomagnetic measurements, measurement of electromagnetic and radiometric quantities in a natural locality, and subsequent evaluation of the obtained results from the point of view of their interrelations and in the context of hygienic regulations. All the theoretical backgrounds of each field are assigned to the measurement methodology and appropriate measuring technique, selected according to information from available sources. Appropriate instruments, landscape location, measurements were made, the results were evaluated and interpreted. The result is graphical output in the QGIS geographic information system.
|
|
|
Map of geodynamic phenomena in the Slanské vrchy Mts., and surrounding.
Lazoríková, Monika ; Weigel, Josef (referee) ; Pospíšil, Lubomil (advisor)
The aim of the diploma thesis has been evaluation of available geodetic, geomorphological, geological and geophysical data and other possible map data, which are related to the motion and geodynamic properties in this part of Western Carpathians. The purpose has been also to evaluate possible kinematic relations and design appropriate areas for further GNSS monitoring. Especially Slanské vrchy area is located in the zone where there are no supporting GNSS points, despite the area is situated on the main tectonic breaks of eastern Slovakia. The results and all supporting materials have been processed in the GIS program and summarized in the basic geodynamic map of Slanské vrchy and the surroundings.
|
|
|
Measuring of the Vertical gravity gradient at the locality TS-73 "Polom", Trutnov - Babí
Pešek, Michal ; Weigel, Josef (referee) ; Pospíšil, Lubomil (advisor)
This master´s thesis deals with the determination of vertical gravity gradient in the shaft below the infantry bunker TS - 73 "Polom" located in village Babí. After performing position, elevation and gravity measurements detailed points, representing the two vertical profiles were calculated gravity, vertical gravity gradient, block densities ang gravity anomalies depending on the depth. Other outputs work as a topographic map and a map of full Bouguer anomalies for the wider area of the location and interpretive geologic profile.
|
|
|
Geophysical prospection of volcanic structures, in the area of Rybí loučky, Jizerské mountains
Fait, Václav ; Valenta, Jan (advisor) ; Skácelová, Zuzana (referee)
This thesis briefly depicts fundamental principles of three geophysical methods (gravimetry, magnetometry and electrical resistivity profiling), which had been used during research at the Rybí lou ky site in order to clarify local geological conditions. Furthermore, the reader gets acquainted with formation of a maar-diatreme, which is thought to be present at the researched site. The next part describes principles of field measurements and the procedure for evaluation of results. The results are graphically plotted in the last part. Also, the results are compared to previous investigations conducted at this site. Geophysical measurements showed that geological structures on the Rybí lou ky site are much more complex than expected. The simple diatreme structure is most likely not applicable in this case. In contrast, it is not a structure formed solely by a glacier. The origin is most likely a combination of tectonic predisposition, volcanic activity and subsequent selective erosion.
|
|
| |
|
|
Geological and geophysical exploration of the Kokonín fault for building constructions (Jablonec n. Nisou, Czech Republic)
Tumurkhuu, Gereltsetseg ; Goliáš, Viktor (advisor) ; Thinová, Lenka (referee)
Radioactivity is an important part of the environment. In the years 2014 - 2015 a survey on medicinal radioactive springs was carried out in the Tanvald granite body. During extensive radiohydrogeochemical exploration in the surrounding area of Schindler spring, the outcrop of U - mineralization has been found at a new construction site in the Kokonín fault. It is possible to find "hot" pieces of uranium ore fragments in the quaternary cover in this place. The occurrence of the hydrothermal (vein) type of uranium in the Krkonoše - Jizera is new as it hasn't been mentioned in literatures before. After an agreement with the owners, detailed radiometric survey proceeded in the surrounding area of two affected houses by using gamma spectrometry and emanometry at the dense net. There is a wider area between two houses with activities of 222 Rn over 1 MBq/m3 and on the ore outcrop was measured 3.3 MBq/m3 . A quaternary solifluction flow with an increased radioactivity creeps down under the House 1. The highest uranium contents reached up to 291 ppm eU (= 3 595 Bq/kg 226 Ra) on the uranium ore lens outcrop. The average of gamma dose rate is 85,6 nGy/h with maximem 261 nGy/h on the outcrop. A further radiometric survey through the entire Kokonín fault line was carried out in an area of roughly 0.25 x 1 km2...
|
guest ::
