Summary Report of Geological Models
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Summary report of geological models Title Summary report of Geological models Authors: Gyula Maros editor MÁFI in cooperation with GeoZS, ŠGÚDŠ, GBA Hungary: Gáspár Albert, Rita Barczikayné Szeiler, László Fodor, László Gyalog, Em őke Jocha-Edelényi, Zsolt Kercsmár, Árpád Magyari, Vera Maigut, Gyula Maros, Annamária Nádor, László Orosz, Klára Palotás, Ildikó Selmeczi, András Uhrin, Zsuzsanna Vikor; Austria: Bernhard Atzenhofer, Rudolf Berka, Magdalena Bottig, Anna Brüstle, Christine Hörfarter, Gerhard Schubert, Julia Weilbold; Slovakia: Ivan Baráth, Klement Fordinál, Balázs Kronome, Juraj Maglay, Alexander Nagy; Slovenia: Bogomir Jelen, Andrej Lapanje, Helena Rifelj, Igor Rižnar, Mirka Trajanova Date 31-MARCH -2012 Status final Type Text Description This document contains overview of the Supra-Regional and the Pilot Area geological models, contains the harmonised legend, the horizon map sheets of the 3D models, sections and explanatory notes of them. Format PDF Language En Project TRANSENERGY –Transboundary Geothermal Energy Resources of Slovenia, Austria, Hungary and Slovakia Work package WP5 Cross-border geoscientific models 5.2.1. 3D geological model CONTENT 1 INTRODUCTION 3 2 PROJECT AREA DEFINITION 3 3 GEOLOGICAL MODELLING IN GENERAL 5 3.1 Scales and workflow 5 3.2 Correlation of the formations 6 3.3 Harmonized legend and surface geological map 7 3.4 Definition geological time horizons corresponding to hydrostratigraphical units – the buildup of the geological model 34 3.5 Borehole re-evaluations 36 3.6 Interpretations of seismic sections 39 3.7 Gravitational and magnetotelluric interpretations 42 3.8 Creation of the Supraregional geological model in ArcGIS and Jewel 47 4 GEOLOGICAL MODELL OF THE SUPRA AREA 50 4.1 Summary of the geological buildup 50 4.1.1 Pre-Cenozoic basement 52 4.1.2 Paleogene basins 60 4.1.3 Neogene basins 64 4.1.3.1 Early and Middle Miocene 64 4.1.3.2 Pannonian 72 4.1.4 Structural evolution of the territory 74 4.1.5 The most important structures of the territory 77 4.1.6 Geological cross-sections of the supra-regional area 79 4.2 Descriptions of the elements of the harmonised legend 81 4.2.1 Formations on Pre-Senonian (Encl.1.16) and Pre-Cenozoic (Encl. 1.14) horizon map 81 4.2.2 Formations on Pre-Lower Miocene horizon map (Tertiary) (Encl. 1.12.) 105 4.2.3 Formations on Pre-Badenian horizon map (Encl. 1.10.) 107 4.2.4 Formations on Pre-Sarmatian horizon map (Badenian) (Encl. 1.8.) 113 4.2.5 Formations on Pre-Lower Pannonian horizon map (Sarmatian) (Encl.1.6.) 120 4.2.6 Formations on Pre-Upper Pannonian horizon map (Lower Pannonian facies) (Encl. 1.4.) 123 4.2.7 Formations on Pre-Quaternary horizon map (Upper Pannonian facies) (Encl. 1.2.) 127 4.2.8 Formations on Surface Geological map (Quaternary) (Encl.1.1.) 130 5 GEOLOGICAL MODELS OF THE PILOT AREAS 133 5.1 Danube basin 133 5.1.1 Geological frame and history 133 5.1.2 Additional horizons 135 5.1.3 Descriptions of additional horizon’s formations 135 5.1.4 Geophysical evaluations: gravity, seismics, magnetotellury 136 5.1.5 Tectonics 136 5.1.6 Cross sections 138 5.1.7 Modelling 140 5.2 Vienna basin 141 5.2.1 Geological frame and history 141 5.2.2 Additional horizons 142 5.2.3 Descriptions of additional horizon’s formations 143 5.2.4 Geophysical evaluations: gravity, seismics, magnetotellury 144 5.2.5 Tectonics 145 5.2.6 Cross sections 147 5.2.7 Modelling 148 5.3 Lutzmansburg–Zsira 151 5.3.1 Geological frame and history 151 5.3.2 Additional horizons 153 5.3.3 Descriptions of additional horizon’s formations 153 5.3.4 Geophysical evaluations: gravity, seismics, magnetotellury 154 5.3.5 Tectonics 154 5.3.6 Cross sections 155 5.3.7 Modelling 156 5.4 Bad Radkersburg–Hodos 160 5.4.1 Geological frame and history 160 5.4.2 Additional horizons 163 5.4.3 Descriptions of additional horizon’s formations 164 5.4.4 Geophysical evaluations: gravity, seismics, magnetotellury 165 5.4.4.1 Geophysical data 165 5.4.4.2 Structure of the pre-Tertiary basement from geophysical data 166 5.4.5 Tectonics 167 5.4.6 Cross sections 168 5.4.6.1 PT_BR_1 Cross section 169 5.4.6.2 PT_BR_2 Cross section 170 5.4.7 Modeling 171 5.5 Komarno–Sturovo 173 5.5.1 Geological frame and history 173 5.5.2 Additional horizons 175 5.5.3 Descriptions of additional horizon’s formations 175 5.5.4 Geophysical evaluations: gravity, seismics, magnetotellury 175 5.5.5 Tectonics 175 5.5.6 Cross sections 177 5.5.7 Modeling 178 6 REFERENCES 182 1 Introduction The aim of the Transenergy project is to support the harmonized thermal water and thermal energy utilization in the western part of the Pannonian Basin and its adjacent basins (e.g. Vienna Basin), which are situated in the transboundary zone of Austria, Hungary, Slovak Republic and Slovenia. This report describes the results of the geological models, which serve as a frame for the hydrogeological and geothermal models. Although the problems of transboundary thermal water utilization can be locally confined, they are rather connected to distant hydrogeological processes. Therefore the modelling activity had to be done at two different scales. The so called Supra regional model includes the entire project area and manages the complete area in a uniform system approach. Five Regional or Pilot areas were chosen, where local models had been developed. They focus on the local transboundary problems, and the detailed geological characteristics of the areas. These areas are the following (Figure 1). • Vienna Basin • Danube Basin • Komarno-Sturovo area • Lutzmansburg-Zsira area • Bad Radkensburg-Hodos area 2 Project area definition The same aspects were considered to outline the different area boundaries, both at the supra-regional and local scales. The most important consideration of the outlining was to define natural model boundaries. Assigning the contours of the model areas the following aspects were taken into consideration: • Geological framework of the areas, • Important tectonic structures • Recharge areas, connecting the thermal water system (the recharge areas do not include the entire mountain regions, only the regions where the main thermal water bearing layers outcrop at the surface), • Rivers as main discharges, • Contours of groundwater bodies, • Groundwater divides The final borders of the model areas consist of the mixture of different boundary types mentioned above. The supra-regional model area encompasses the main geothermal reservoirs of the NW Pannonian Basin and the adjacent areas where the different natural and human processes have effects on the geothermal systems. Within the project area several sub-regions of enhanced hydrogeothermal utilization potential (pilot areas) have been identified and investigated in a more detailed way. The pilot areas usually form geological or hydrogeological units. The Vienna Basin is a deep sedimentary basin surrounded by mountains, the outer border of the Eastern Alps and 3 Central West Charpatians. It joins to the Danube Basin at the SSE edge. The Danube Basin is a deep sedimentary basin too. The border of the model area was appointed along the pinch out, truncation and thinning of sedimentary formations. Due to the location of its recharge area, it locally overlaps to the Komarno-Sturovo model area. This latter one was outlined along regional fault systems which often coincide with the border line of groundwater bodies. The Bad-Radkersburg-Hodos model area is mainly bordered by tectonic structures too, forming a tectonic halftrench. The Lutzmansburg-Zsira model area is not connected to a specific geologic or hydrogeologic unit. The western border of the area forms the margin of the Neogen basin. The other parts are appointed along artifical borders, taking into account that the area includes the important Hungarian spa „Bük”. The vertical boundary of the geological models has been defined at the depth of 8000 m below see level. The Supra regional and Pilot areas are shown on Fig. 1. Fig. 1. The supra-regional and the pilot model areas Figure 2 shows the generally used geographical names and morphological conditions of the whole project territory. It is characteristically a lowland and basin area, the recharge mountainous regions have only marginal positions. Two capitals of the partner countries lie on the supra area, Vienna and Bratislava, but numerous populated citys are in it i.e. Gy őr, Graz, Maribor. 4 Fig. 2. Often used geographical terms in the project area 3 Geological modelling in general In the following, we demonstrate the main features and steps of creating the geological models at different scales. 3.1 Scales and workflow The final products scales of the Supra regional and Regional area models are the following: Supra regional area 1:500 000, Surface geology 1: 200 000 Danube basin 1:200 000, Vienna Basin 1:200 000, Lutzmasburg-Zsira 1:100 000, Bad Radkensburg-Hodos 1:200 000, Komarno-Sturovo 1:200 000. The applied workflow can be seen on Figure 3. The greyish columns represent work months. The workflow could be devided into 3 parts: 1) Evaluation and systematization of geological data, 2) Correlation among data systems, 3) Geological modelling. Note the double headed arrows that figure the necessary iterative processes which were the most time- consuming working steps. 5 Fig. 3. Workflow chart of geological modelling. The greyish columns are work months. The country codes after Pilot area models show, that each Pilot area model was dedicated to responsibility of different partner countries. 3.2 Correlation of the formations One of the first data harmonization steps had to be the correlation of different formations.