Stratigraphy of the Late Miocene basin fill below Lake Balaton Ferenc Visnovitz PhD Student Department of Geophysics and Space Sciences, Eötvös Loránd University, Budapest, Hungary ISZA 2012 March 31. 1

1. The Study Area (Lake Balaton) 2 http://www.csak-csak-neked.eoldal.hu/fenykepek/nyar/balaton-20terkep2.-.html Balatonos képek! Tóth Zsuzsa 2009, Sacchi 2001 nyomán

Location of self-slope in the Late Miocene 2. Geological and stratigraphic background (The studied formations and environments) 3 After Magyar et al, 1999 Zagyva – delta plain Újfalu – delta front Algyő – delta slope Szolnok – turbidites & submarine fans Endrőd – deep water marl Location of self-slope in the Late Miocene Tihany – basin edge marshes Somló – delta slope Szák – shallow water Csór – shallow water with high energy, above wavebase Csákvár – lagoons with low O2 Kálla, Kisbér, Zámor – beach with wave movement Juhász, 1998 After Magyar et al, 2009 After Horváth et al , 2010 Sacchi, 2002

Water seismic imaging method 3. The imaging method and recent data base 4 Water seismic imaging method Szafián, 2007 Single Channel Surveys: Instrument: SEISTEC™ Source: boomer Resolution: 0.1 m Penetration depth: 5-20 m Positioning: Laser teodolit and DGPS Recording: PRESEIS

Seistec™ single channel images, 1997-2011 3. The imaging method and recent data base 5 Seistec™ single channel images, 1997-2011

3. The imaging method and recent data base 6 Italian-Hungarian cooperation, 1993

3. The imaging method and recent data base 7 German multichannel lines, 2004

4. Interpretation method, systematic mapping of the „main” horizons 8 Chosing a horizon to follow Map the horizon by correlating it from one seismic section to another Griding Blanking the eroded surface

Summary of identified sediment packages 5. Stratigrapic position of the mapped horizons along a composite seismic profile 9 5 km Lower/Middle Pleistocene water mud Pannonian strata N Summary of identified sediment packages 10 km

6. Specific boundaries 10 BAL-023 BAL-01

6. Interesting mound-like features in one of the sediment packages 11 0 ms 50 ms 1 km A promising interpretation and importance Travertine mounds or geysirites? Scheuer and Schweitzer, 1985

7. Horizons as parasequences Correlation with well-logs 1. (K-33) 12 Well log after Szick Nóra, 2010

7. Horizons as parasequences Correlation with well-logs 2. (S-3) 13 Well log after Szick Nóra, 2010

7. Horizons as parasequences Correlation through wells 14

Holocene-Pleistocene 8. Summary: The theoretical model of the imaged Pannonian Strata 15 Base Pannonian Base Pannonian Base Holocene-Pleistocene Base Pannonian After Porebski & Steel, 2003

Thank you for your attention! Acknowledgment Special thanks to F. Horváth supervising my PhD research, OTKA NK83400 for financial support, and Thank you for your attention!