Thesis supervisor: István János Kovács
Location of studies (in Hungarian): MTA Csillagászati és Földtudományi Kutatóközpont, Földtani és Geokémiai Intézet Abbreviation of location of studies: MTA
Description of the research topic:
In the history of mankind several geo-risks threatened the society among which huge earthquakes are notably the most significant ones. An example within the Carpathian-Pannonian region is the Vrancea earthquake in 1977, which claimed more than 1500 victims. This earthquake (with an epicenter around 80 km in depth) is potentially connected to the young subduction event, which took place within the Carpathian Bend area. Different kinds of mechanisms can trigger earthquakes (eg. post-volcanic activity gas emanation or the fluid content of the rock forming mineral). The tension-uplift stress of the uplifting gasses may be enough to provoke new earthquakes. In addition, ‘water’ in the nominally anhydrous minerals of the upper mantle could also contribute to its different deformation style and viscosity, which obviously have a bearing on the focal mechanism of earthquakes. With monitoring the gasses (from mud volcanoes, mofetta, water with gas content) and doing parallel geophysical research (e.g. seismic interpretation, magnetotellurics) we may get a better understanding on the connection between the recent surface gas emanation and the regional seismic activity. For this reason, fluid and melt inclusions in the nominally anhydrous minerals of upper-mantle xenoliths from the Persány Mountains will be studied. Fortunately the volcanic activity, in a geological point of view, is very young, thus, it is possible to compare the geochemical information to the results of present geophysical surveys in order to obtain a process oriented hypothesis for the relationship between the gas emanations and seismic activity.
Required language skills: angol Number of students who can be accepted: 1
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