Browsing by Subject "rift"

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An investigation of Devonian salt-domes at the major tectonic regions of the Dniper-Donets basin
(Data obrony: 2016-09-28) Gizun, Mariia
Wydział Geologii, Geofizyki i Ochrony Środowiska
The aim of the Master Thesis of Economic Geology is to get the most important skill for the future employer in the exploration geology business. The major job responsibilities of the Economic Geologist are: data handling, classification and analyses of the raw and archive data, pre-interpretation with indication of the future target or scientific potential of the data. Due to the mentioned career values I built my Master Thesis work. I believe that Dniper Donets basin has a great exploration potential for hydrocarbon not only among the State Ukrainian companies but as well for foreign investors, that is why the local professionals should be ready to show and to explain the World oil and gas exploration companies the resource potential of the Dniper Donets basin, based on not only the local framework geo-data but as well the public materials presented in the scientifically articles or public geological reviews. The study give a detail analyses of the archive seismic data and based on my study and working experience. The main purposes of the work are obtaining the seismic interpretation skills in complex with analyses of the framework data. One of the principle geological features of the Dniper Donets basin is salt tectonic architecture. Due to this fact in my work I will identified the major regional references horizons with faults and identified the major forms of salt structures at the tree principle tectonic parts of the Dniper Donets basin: the Axial zone, Southern and Northern Flank zones. For this reason, I used in my report available data set which is provides the processed seismic data for the following types of salt structures: sheet salt, pillow salt, columnar salt dome, salt dome with cap-rock formation on the top, and canopy salt structures. Interpreting seismic data requires an understanding of the subsurface formations, general structural and stratigraphic features of the study area and how they may affect wave reception. The major peace of the work connected with seismic stratigraphy thus one of the principle part of work is indication of a strata surfaces and their correlation with tectonic sequences of the DDB. The regional tectono-stratigraphy building of the DDB presented on the scientific publications of Stovba and Stephenson. From my point of view the publications gives satisfy structural and sequence basics of the DDB for the foreign reader. Seismic interpretation was carried out on GeoGraphix Discovery 2009 time volume of 2D and 3D seismic data. The interpretation of 2D and 3D seismic profiles takes in account VSP data, Log-Well summary reports and consulting with local geophysicist and geologists due to the major principles of seismic interpretation procedure and project leading.
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Petrologia wybranych skał magmowych Islandii w ujęciu tektoniki kier
(Data obrony: 2011-12-13) Jarosińska, Krystyna
Wydział Geologii, Geofizyki i Ochrony Środowiska
The geology of Iceland results from the location in the rift zone and, possibly, deeper rooted hot spot. Therefore, the island is raised above the surface of the ocean and behaves like a microcontinent. Geochemical and petrological interpretation based on literature data allowed to conclude that Icelandic basalts belong to three magma series: tholeiitic, alkali and transitional alkaline. This diversity is attributed to partial melting of depleted upper mantle, enriched mantle plume and recycled oceanic crust. Silicic volcanism is characteristic for central volcanoes. Source of acidic and intermediate rocks are located directly under the central volcanoes as intrusive complexes. In these complexes there are hydrothermally modified sediments and the early products of the same volcano. Hence these acidic rocks are thought to be generated from basaltic rocks.