Aubrecht Field Trip Guide 2012
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Journal of Alpine Geology, 54: 33-99, Wien 2012 From Late Triassic passive to Early Cretaceous active continental margin of dominantly carbonate sediments in the Transdanubian Range, Western Tethys By GÉZA CSÁSZÁR, JÁNOS HAAS, ORSOLYA SZTANÓ & BALÁZS SZINGER With 120 figures Field Trip Guide 29th IAS Meeting of Sedimentology Schladming, Austria Addresses of the authors: Géza Császár János Haas Orsolya Sztanó ELTE University Pázmány sétány 1/c 1117 Budapest Hungary E-mail addresses: [email protected]; [email protected], [email protected] Balázs Szinger MOL NyRt. Batthyány utca 45 1039 Budapest Hungary E-mail address: [email protected] Journal of Alpine Geology 54 S. 33-99 Wien 2012 33 CSÁSZAR, HAAS, SZTANÓ & SZINGER: From Late Triassic passive to Early Cretaceous active continental margin ... Content Abstract..........................................................................................................................................................................34 1. Topics and area of the Field Trip...................................................................................................................................35 2. Introduction.................................................................................................................................................................36 3. Speciality of the Transdanubian Range.........................................................................................................................37 3.1. The Gerecse Mountains........................................................................................................................................37 3.2. North Bakony and Vértes Foreland subunit...........................................................................................................37 3.3. South Bakony subunit...........................................................................................................................................37 3.4. The importance of successions from applied point of view.....................................................................................38 4. The Field Trip..............................................................................................................................................................38 4.1. First day: Jurassic to Cretaceous of the South Bakony and Gerecse western foreland...............................................38 Stop 1: Vár-hegy (Castle Hill) Sümeg...................................................................................................................38 Stop 2: Mogyorós Hill, Sümeg.............................................................................................................................40 Stop 3: Sintérlap quarry, Sümeg,..........................................................................................................................42 Stop 4: Tüzkö Hill, Szomód.................................................................................................................................45 4.2. Second day: Upper Triassic platform carbonate, Jurassic basins and highs, Lower Cretaceous clastics, Gerecse Mts...........................................................................................................................................47 Stop 1: Kecskekö quarry, Lábatlan village............................................................................................................48 Stop 2: Bersek Hill, Lábatlan...............................................................................................................................52 Stop 3: Köszörüköbánya, Lábatlan.......................................................................................................................54 Stop 4: Törökbükk, Lábatlan................................................................................................................................56 Stop 5: Szél-hegy, Tardos.....................................................................................................................................58 4.3. Third day: Gerecse - Tata Geological Garden, Vértes and North Bakony: Upper Triassic to Lower Cretaceous........60 Stop 1: Kálvária Hill, Tata Geological Garden......................................................................................................61 Stop 2: Harmatos/LófarValley, Mór, (optional stop)..............................................................................................68 Stop 3: Csókakö, Giant neptunian dykes (optional stop).......................................................................................69 Stop 4: Tüzköves Ravine, Bakonycsernye.............................................................................................................72 Stop 5: Zsidó-hegy, Bakonynána..........................................................................................................................77 4.4. Fourth Day: North and South Bakony: Lower Jurassic to Lower Cretaceous...........................................................77 Stop 1: Eperjes Hill, Olaszfalu village..................................................................................................................78 Stop 2. Abandoned quarry between villages Zirc and Borzavár.............................................................................82 Stop 3: Szilas Valley/Pálihálás homestead, Borzavár Village................................................................................86 Stop 4: Köris Mount, Bakonybél (optional stop)...................................................................................................89 Stop 5: Manganese slurry reservoir, Úrkút village................................................................................................89 Stop 6: Abandoned quarry between Úrkút and Ajka (optional stop).......................................................................92 Stop 7: Manganese ore deposit, Csárda Hill, Úrkút...............................................................................................92 5. Summary of the connection between the geodynamic history and the change of the sedimentary systems.......................94 in the Eastern Alps and the Transdanubian Range........................................................................................................94 5.1. Short summary of the Jurassic sedimentary environments of the Transdanubian Range.........................................94 5.2. Short summary of the main characteristics of the Cretaceous platform carbonates in the Transdanubian Range...........................................................................................................................................95 5.3. A few notes to Cretaceous clastics of the Gerecse Mts.............................................................................................97 Acknowledgements.................................................................................................................................................................97 References......................................................................................................................................................................97 Abstract sedimentation continued up to the Middle Jurassic when it was replaced by cherty limestones and bedded radiolarites The Transdanubian Range is part of a huge carbonate in the basin, while on submarine highs there was no platform until the earliest Early Jurassic. The first signal sedimentation at all or just highly lacunose one. Due to a of the opening of the Penninic Ocean is the break of the shallowing tendency in the North Bakony Mts., the carbonate platform system. The result of this process is deposition of Ammonitico Rosso-type limestones with the differentiation of the sedimentary environments into white pelagic cherty limestones and marls were from the highs with comparatively thin, discontinuous and into Late Jurassic to the Early Cretaceous in the South Bakony. deeper-water areas with condensed lithofacies, and thicker, In contrast, the Early Cretaceous strata in the Gerecse Mts. continuous successions showing less condensation. (northern part of the Transdanubian Range) represent a Throughout the Liassic partly nodular, cherty limestones siliciclastic deep-water succession including marls, with interbedded Hierlatz Limestone, typical Ammonitico turbiditic sequences and conglomerates with ophiolithic Rosso-type limestones and marls occur. Pelagic carbonate detritus. This event caused by the partial closure of the 34 Journal of Alpine Geology, 54: 33-99, Wien 2012 Neotethys Ocean. In the Late Jurassic, there is no clear and marls of basin facies variations reflecting the early evidence for a nappe structure in the Transdanubian Ran- phase of the extensional tectonic movement and the ge but there are some hints for it to the north. Fundamen- vicinity of the submarine highs. tal facies changes between the south-western and the north- · Giant neptunian dykes of varied types of Middle Jurassic eastern part caused by compressional deformation in the limestones with different sizes of Jurassic and Upper Early Berriasian. Later, a new sedimentary cycle began Triassic fragments of limestones and dolomites. with the deposition of freshwater and brackish marlstones, · Middle Jurassic scarp or rockfall breccia with Triassic locally with bauxite lenses at the base of the new succession. and Lower Jurassic limestone