Integrated geophysical and geological methods to investigate the inner and outer structures of the Quaternary Mýtina maar (W-Bohemia, Czech Republic)

0441001 - GFÚ 2016 RIV DE eng J - Journal Article
Flechsig, C. - Heinicke, J. - Mrlina, Jan - Kämpf, H. - Nickschick, T. - Schmidt, A. - Bayer, Tomáš - Günther, T. - Rücker, C. - Seidel, E. - Seidl, Michal
Integrated geophysical and geological methods to investigate the inner and outer structures of the Quaternary Mýtina maar (W-Bohemia, Czech Republic).
International Journal of Earth Sciences. Roč. 104, č. 8 (2015), s. 2087-2105. ISSN 1437-3254. E-ISSN 1437-3262
R&D Projects: GA MŠMT LM2010008
Institutional support: RVO:67985530
Keywords : Eger Rift * Quaternary maar volcanism * Mýtina maar * geophysical and geological survey
Subject RIV: DC - Siesmology, Volcanology, Earth Structure
Impact factor: 2.133, year: 2015

The Mýtina maar is the first known Quaternary maar in the Bohemian Massif. Based on the results of Mrlina et al. (J Volcanol Geother Res 182:97-112, 2009), a multiparametric geophysical (electrical resistivity tomography, gravimetry, magnetometry, seismics) and geological/petrochemical research study had been carried out. The interpretation of the data has provided new information about the inner structure of the volcanic complex: (1) specification of the depth of post-volcanic sedimentary fill (up to similar to 100 m) and (2) magnetic and resistivity signs of one (or two) hidden volcanic structures interpreted as intrusions or remains of a scoria cone. The findings at the outer structure of the maar incorporate the (1) evidence of circular fracture zones outside the maar, (2) detection and distribution of volcanic ejecta and tephra-fall deposits at the surface, and (3) indications from electrical resistivity tomography and gravity data in the area between the Mýtina maar and Železná hůrka scoria cone, interpreted as a palaeovalley, filled by volcaniclastic rocks, and aligned along the strike line (NW-SE) of the Tachov fault zone.
Permanent Link: http://hdl.handle.net/11104/0244053