The structure of the upper crust in the Alps-Apennines boundary region deduced from refraction seismic data |
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| Institution: | 1. Istituto per la Geofisica della Litosfera, Consiglio Nazionale delle Richerche, Via Bassini 15, 20133 Milan Italy;2. Dipartimento di Scienze della Terra, Università di Milano, Via Mangiagalli 34, Milan Italy;1. Dipartimento di Scienze Biologiche, Geologiche ed Ambientali (BiGeA), Università degli Studi di Bologna, Via S. Alberto 163, 48123, Ravenna, Italy;2. Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, Via Giuseppe Campi 103, 41125, Modena, Italy;3. Dipartimento di Scienze Biologiche, Geologiche ed Ambientali (BiGeA), Università degli Studi di Bologna, Piazza di Porta San Donato 1, 40126, Bologna, Italy;1. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China;2. Beijing Key Laboratory on Resource-oriented Treatment of Industrial Pollutants, Beijing, 100083, China;1. Shandong Provincial Key Laboratory of Deep Oil & Gas, China University of Petroleum (East China), Qingdao 266580, China;2. Department of Geology, China University of Petroleum (East China), Qingdao 266580, China;3. Geology Department, University of Illinois at Urbana-Champaign, United States;4. Key Laboratory of Tectonics and Petroleum Resources, Ministry of Education, China University of Geosciences (Wuhan), Wuhan 430074, China;5. CSIRO Energy, Kensington, Western Australia, Australia;6. Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals, Shandong University of Science and Technology, Qingdao 266580, China;7. Kosygin Institute of Tectonics and Geophysics, Far Eastern Branch, Russian Academy of Sciences, Khabarovsk, Russia;1. Faculty of Medicine and Surgery, University of Malta, Msida, MSD 2080, Malta;2. Faculty of Science, Chemistry and Pharmacology Building, University of Malta, Msida, MSD 2080, Malta;3. Faculty of Medicine and Surgery, Centre for Molecular Medicine, Biomedical Science Building, University of Malta, Msida, MSD 2080, Malta;4. American University of Malta, Triq Dom Mintoff, Bormla, BML1013, Malta |
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| Abstract: | Analysis of data gathered during the 1983 European Geotraverse southern segment (EGT-S '83) experiments in the region extending from the Emilia-Liguria Apennines to the western Alpine Arc together with data from seismic profiles in the northwestern Apennines accumulated within the framework of the Alps-Apennines Orogene Study Group indicate new details on the structure of the upper crust east and west of the Alps-Apennines boundary.The main results of this analysis centre on two areas. In the Piedmont Tertiary Basin we could determine the depocenter configurations of the 6–7 km thick terrigenous sequence and differentiate the tectonic units in the Piedmont (Alpine) and the Ligurian (Apennine) domains within the basement. In the other area, the Insubric domain underneath the Ligurian nappes of the northern Apennines, we found indications of tectonic doubling within the terrigenous-carbonate sequence in which thrusting attenuates towards the underlying basement, detected at a depth of 12–15 km. In addition, we found that, on a line from the Emilia Apennines to the Monferrato Hills, displacement of the Ligurian nappes over the Insubric domain diminishes to nearly one-third its original extent. |
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