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The structure and evolution of the Northern Tyrrhenian Sea

Published online by Cambridge University Press:  01 May 2009

J. V. A. Keller  and
M. P. Coward
J. V. A. Keller
Affiliation:
Imperial College, Department of Geology, Prince Consort Road, London SW7 2BP, UK
M. P. Coward
Affiliation:
Imperial College, Department of Geology, Prince Consort Road, London SW7 2BP, UK
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Abstract

Field studies on the island of Elba and seismic lines from the Northern Tyrrhenian Sea, Italy, indicate that major extensional displacements were accommodated along east-dipping low-angle detachment faults. The rifting and subsidence in the Northern Tyrrhenian Sea basin have followed convergence and collision of the Corso-Sardinian block and the Apulian microplate. This collisional episode produced the Northern Apennines fold-and-thrust belt. Major extensional faults cut down-section through the stratigraphy and pre-existing west-dipping thrust faults. West-dipping thrusts can also be reactivated and form antithetic faults to the east-dipping detachments. Brittle deformation conditions predominated during the extensional phase. The geometry, internal structure and the fabrics (brittle and penetrative) associated with a well-exposed low-angle extensional detachment in Elba are presented in this paper. A geometrical model for the brittle extensional faulting is presented in which regional extension was accommodated on a system consisting of two sets of simultaneously active antithetic faults. The east-dipping detachment faults appear to have started at steeper angles, based on field and seismic observations, and rotated counter-clockwise to lower dips. Due to this rotation, and for space accommodation, antithetic west-dipping faults formed and rotated clockwise. A tectonic model is proposed whereby slowing of the convergence between Apulia and Corsica, as well as Tethys oceanic crust and Apulian crust subduction, led to the delamination of the Apulian litho-spheric mantle away from the crust. Accompanying asthenospheric upwelling and intrusion at the crust—mantle interface beneath the Tyrrhenian Sea caused late orogenic crustal stretching in the Northern Apennines internal zone.

Type
Articles
Information
Geological Magazine , Volume 133 , Issue 1 , January 1996 , pp. 1 - 16
Copyright
Copyright © Cambridge University Press 1996

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References

Alvarez, W., 1972. Rotation of the Corsica—Sardinia microplate. Nature 235, 103–5.Google Scholar
Alvarez, W., & Lowrie, W., 1974. Paleomagnetismo della Scaglia Rossa umbra e rotazione della peninsola Italiana. Bollettino della Società Geologica Italiana 93, 883–91.Google Scholar
Ambrosetti, P., Carboni, M. G., Conti, M. A., Costantini, A., Esu, D., Gandin, A., Girotti, O., Lazzarotto, A., Mazzanti, R., Nicosia, U., Parisi, G., & Sandrelli, F., 1978. Evoluzione paleogeografica e tettonica nei bacini Tosco-Umbro-Laziali nel Pliocene e nel Pleistocene inferiore. Memorie della Società Geologica Italiana 19, 573–80.Google Scholar
Bally, A. W., Burbi, L., Cooper, C., & Ghelardoni, R., 1986. Balanced sections and seismic reflection profiles across the Central Apennines. Memorie della Società Geologica Italiana 35, 257–310.Google Scholar
Bartole, R., Torelli, L., Mattei, G., Peis, D., & Bracolini, G., 1991. Assetto stratigrafico-strutturale del Tirreno Settentrionale: stato del’;arte. In Studi preliminari all’;acquisizione dati del profilo Punta Ala-Gabicce (eds Cassinis, R., Deiana, G., Pialli, G., Rau, A., Serri, G. and Traversa, G.), pp. 115–40. Studi Geologici Camerti, Special Volume 1991/1.Google Scholar
Batini, F., Bertini, G., Giannelli, G., Pandelli, E, & Puxeddu, M., 1983. Deep structure of the Larderello field: contribution from recent geophysical and geological data. Memorie della Società Geologica Italiana 5, 219–35.Google Scholar
Boccaletti, M., Elter, P., & Guazzone, R., 1971. Plate tectonic models for the development of the Western Alps and Northern Apennines. Nature 234, 10811.Google Scholar
Brun, J.-P., Merle, O., 1985. Strain patterns in models of spreading-gliding nappes. Tectonics 7, 705–19.CrossRefGoogle Scholar
Calcagnile, G., & Panza, G. F., 1980. The main characteristics of the lithosphere—asthenosphere system in Italy and surrounding regions. Pure and Applied Geophysics 118, 865–79.Google Scholar
Carmignani, L., Giglia, G., & Kligfield, R., 1978. Structural evolution of the Apuane Alps: an example of continental margin deformation in the Northern Apennines, Italy. Journal of Geology 86,487–504.CrossRefGoogle Scholar
Carmignani, L., & Kligfield, R., 1990. Crustal extension in the Northern Apennines: the transition from compression to extension in the Alpi Apuane core complex. Tectonics 9, 1275–1303.CrossRefGoogle Scholar
Cassinis, R., Franciosi, R., & Scarascia, S., 1979. The structure of the Earth’;s crust in Italy — a preliminary typology based on seismic data. Bollettino di Geofisica Teorica e Applicata 21, 105–26.Google Scholar
Coward, M. P., & Kim, J. H., 1981. Strain within thrust sheets. In Thrust and Nappe Tectonics (eds McClay, K. R. and Price, N. J.), pp. 275–92. Special Publication of the Geological Society, London, no. 9.Google Scholar
Coward, M. P., & Potts, G. J., 1983. Complex strain patterns developed at the frontal and lateral tips to shear zones and thrust zones. Journal of Structural Geology 5, 383–99.CrossRefGoogle Scholar
Dallan, Nardi L., & Nardi, R., 1974. Schema stratigrafico e strutturale dell’; Appennino Settentrionale. Memorie della Accademia Lunigianese di Scienze “G. Cappellini” 42, 1–212.Google Scholar
Davis, G. H., 1980. Structural characteristics of metamorphic core complexes. In Cordilleran metamorphic core complexes (eds Crittenden, M. D. Jr, Coney, P. J. and Davis, G. H.), pp. 35–77. Geological Society of America Memoir no. 153.CrossRefGoogle Scholar
Davis, G. H., & Coney, P. J., 1979. Geologic development of Cordilleran metamorphic core complexes. Geology 7, 120–4.2.0.CO;2>CrossRefGoogle Scholar
Decandia, F. A., Lazzarotto, A., Liotta, D., & Tavarnelli, E., 1994. Superfici strutturali profonde della Toscana e dell’;Umbria-Marche. Studi Geologici Camerti, Special Volume 1994/1, 227–33.Google Scholar
Della, Vedova B., Pellis, G., Foucher, J. P., & Rehault, J.-P., 1984. Geothermal structure of the Tyrrhenian Sea. Marine Geology 55, 271–89.CrossRefGoogle Scholar
Duschenes, J., Sinha, M. C., & Louden, K. E. 1986. A seismic refraction experiment in the Tyrrhenian Sea. Geophysical Journal of the Royal Astronomical Society 85, 139–60.CrossRefGoogle Scholar
Elliott, D., 1976. The energy balance and deformation mechanisms of thrust sheets. Philosophical Transactions of the Royal Society London 283, 289–312.Google Scholar
Elter, P., Giglia, G., Tongiorgi, M., & Trevisan, L., 1975. Tensional and compressional areas in the recent (Tortonian to present) evolution of the Northern Apennines. Bollettino di Geofisica Teorica e Applicata 17, 3–19.Google Scholar
Fabbri, A., Gallignani, P., & Zitellini, N., 1981. Geologic evolution of the peri-Tyrrhenian sedimentary basins. In Sedimentary basins of Mediterranean margins (ed. Wezel, F. C.), pp. 101–26. Bologna: Tecnoprint.Google Scholar
Giese, P., Reutter, K.-J., Jacobshagen, V., & Nicolich, R., 1982. Explosion seismic crustal studies in the Alpine Mediterranean region and their implications to tectonic processes. In Alpine Mediterranean Geodynamics (eds Berckhemer, H. and Hsü, K.), pp. 39–73. American Geophysical Union, Geodynamics Series no. 7.CrossRefGoogle Scholar
Jackson, J. A., & White, N. J., 1989. Normal faulting in the upper continental crust: observations from regions of active extension. Journal of Structural Geology 11, 15–36.CrossRefGoogle Scholar
John, B. E., & Foster, D. A. 1993. Structural and thermal constraints on the initiation angle of detachment faulting in the southern Basin and Range: The Chemehuevi mountains case study. Geological Society of America Bulletin 105, 1091–1108.2.3.CO;2>CrossRefGoogle Scholar
Jolivet, L., Dubois, R., Fournier, M., Goffé, B., Michard, A., & Jourdan, C., 1990. Ductile extension in alpine Corsica. Geology 18, 1007–10.2.3.CO;2>CrossRefGoogle Scholar
Jolivet, L., Daniel, J.-M., & Fournier, M., 1991. Geometry and kinematics of extension in Alpine Corsica. Earth and Planetary Science Letters 104, 278–91.CrossRefGoogle Scholar
Kastens, K., Mascle, J., Auroux, C., Bonatti, E., Broglia, C., Channell, J., Curzi, P., Emeis, K. C., Glacon, G., Hasegawa, S., Hieke, W., Mascle, G., Mccoy, F., Mckenzie, J., Mendelson, J., Muller, C., Rehault, J.-P., Robertson, A., Sartori, R., Sprovieri, R., & Torii, M., 1988. ODP Leg 107 in the Tyrrhenian Sea: insights into passive margin and back-arc basin evolution. Geological Society of America Bulletin 100, 1140–56.2.3.CO;2>CrossRefGoogle Scholar
Keller, J. V. A., & Pialli, G., 1990. Tectonics of the island of Elba: a reappraisal. Bollettino delta Societá Geologica Italiana 109,413–25.Google Scholar
Keller, J. V. A., Minelli, G., & Pialli, G., 1994. Anatomy of late orogenic extension: the Northern Apennines case. Tectonophysics 238, 275–94.CrossRefGoogle Scholar
Kligfield, R., 1979. The Northern Apennines as a collisional orogen. American Journal of Science 279, 676–91.CrossRefGoogle Scholar
Lavecchia, G., Brozzetti, F., Barchi, M., Menichetti, M., & Keller, J. V. A., 1994. Seismotectonic zoning in east—central Italy deduced from an analysis of the Neogene to present deformations and related stress fields. Geological Society of America Bulletin 106, 1107–20.2.3.CO;2>CrossRefGoogle Scholar
Letz, H., Reichert, C., & Wigger, P., 1977. Results of two seismic refraction lines in the Northern Apennines. Bollettino di Geofisica Teorica ed Applicata 75 /76, 225–32.Google Scholar
Lister, G. S., & Davis, G. A., 1989. The origin of metamorphic core complexes and detachment faults formed during Tertiary continental extension in the Colorado river region, USA. Journal of Structural Geology 11, 65–93.CrossRefGoogle Scholar
Logan, J.M., Friedman, M., Higgs, N. G., Dengo, C., & Shimamoto, T., 1979. Experimental studies of simulated gouge and their application to studies of natural fault zones. In Proceedings of Conference VIII, Analysis of actual fault zones in bedrock. U.S. Geological Survey Open File Report no. 79–1239,305–43.Google Scholar
Malinverno, A., & Ryan, W. B. F., 1986. Extension in the Tyrrhenian Sea and shortening in the Apennines as a result of arc migration driven by the sinking of the lithosphere. Tectonics 5, 227–16.CrossRefGoogle Scholar
Merle, O., & Brun, J.-P., 1984. The curved translation path of the Parpaillon nappe (French Alps). Journal of Structural Geology 6,711–19.CrossRefGoogle Scholar
Mongelli, F., & Zrro, G., 1991. Flusso di calore nella regione toscana.In Studi preliminari all’;acquisizione dati del profilo Punta Ala-Gabicce (eds Cassinis, R., Deiana, G., Pialli, G., Rau, A., Serri, G. and Traversa, G.), pp. 91–8. Studi Geologici Camerti, Special volume 1991/1.Google Scholar
Morelli, C., 1970. Physiography, gravity and magnetism of the Tyrrhenian Sea. Bollettino di Geofisica Teorica e Applicata 12,273–305.Google Scholar
Morelli, C., Giese, P., Carrozzo, M. T., Colombi, B., Hirn, A., Letz, H., Nicolich, R., Prodehl, C., Reichert, C., Rower, P., Sapin, M., Scarascia, S., & Wigger, P., 1977. Crustal and upper mantle structure of the Northern Apennines, the Ligurian Sea and Corsica, derived from seismic and gravimetric data. Bollettino di Geofisica Teorica e Applicata 19, 199–260.Google Scholar
Platt, J. P., & Compagnoni, R., 1990. Alpine ductile deformation and metamorphism in a Calabrian basement nappe (Aspromonte, south Italy). Eclogae Geologicae Helvetia 83,41–58.Google Scholar
Principi, G., & Treves, B., 1984. II sistema Corso-Appenninico come prisma d’;accrezione. Riflessi sul problema generale del limiti Alpi-Appennini. Bollettino delta Società Geologica Italiana 28,549–76.Google Scholar
Ramberg, H., 1981. Gravity, deformation and the Earth’;s crust. In theory, experiments and geological application. London: Academic Press, 452 pp.Google Scholar
Rehault, J.-P., Moussat, E., & Fabri, A., 1987. Structural evolution of the Tyrrhenian back-arc basin. Marine Geology 74, 123–50.CrossRefGoogle Scholar
Reutter, K.-J., Giese, P., & Closs, H., 1980. Lithospheric split in the descending plate: observations from the Northern Apennines. Tectonophysics 64, T1–T9.CrossRefGoogle Scholar
Royden, L. H., 1988. Late Cenozoic tectonics of the Pannonian basin system. In The Pannonian Basin: A Study in Basin Evolution (eds Royden, L. H. and Horváth, F.), pp. 27–48. Memoir of die American Association of Petroleum Geologists no. 45.Google Scholar
Rutter, E. H., Maddock, R. H., Hall, S. H., & White, S. H., 1986. Comparative microstructures of natural and experimentally produced clay-bearing fault gouges. Pure and Applied Geophysics 124, 3–30.CrossRefGoogle Scholar
Salvini, F., & Vittori, E., 1982. Analisi strutturale della linea Olevano-Antrodoco-Posta (Ancona-Anzio Auct.): metodologia di studio delle deformazioni fragili e presen-tazione del tratto meridionale. Memorie della Società Geologica Italiana 24, 337.Google Scholar
Sartori, R., Kastens, K., Mascle, J., Auroux, C., Bonatti, E., Broglia, C., Channell, J., Curzi, P., Emeis, K. C., Glaçon, G., Hasegawa, S., Hieke, W., Mascle, G., Mccoy, F., Mckenzie, J., Mendelson, J., Mukhopadhyay, P., Muller, C., Rehault, J.-P., Robertson, A., Sprovieri, R., & Torii, M., 1989. Drillings of ODP Leg 107 in the Tyrrhenian Sea: Tentative basin evolution compared to deformations in the surrounding chains. In The Lithosphere in Italy. Advances in Earth Science Research (eds Boriani, A., Bonafede, M., Piccardo, G.B. and Vai, G.B.), pp. 715–30. Accademia Nazionale dei Lincei (Rome), Atti dei Convegni Lincei no. 80.Google Scholar
Saupé, F., Marignac, C., Moine, B., Sonet, J., & Zimmermann, J. L., 1982. Datation par les méthodes K/Ar et Rb/Sr de quelques roches de la partie orientale de 1’;lie d’;Elbe (province de Livourne, Italie). Bulletin de Minéralogie 105,236–45.CrossRefGoogle Scholar
Selli, R., Lucchini, F., Rossi, P., Savelu, C., & Del Monte, M., 1977. Dati geologici, petrochimici e radiometrici sui volcani centro—tirrenici. Giornale di Ceologia 42, 221–46.Google Scholar
Trevisan, L., 1951. Sul complesso sedimentario del Miocene superiore e Pliocene della Val di Cécina e sui movimenti tettonici tardivi in rapporto ai giacimenti di lignite e di salgemma. Bollettino della Società Geologica Italiana 70,65–78.Google Scholar
Trincardi, F., & Zitellini, N., 1987. The rifting of the Tyrrhenian Basin. Ceo-Marine Letters 7, 1–6.CrossRefGoogle Scholar
Wernicke, B., 1981. Low-angle normal faults in the Basin and Range province: nappe tectonics in an extending orogen. Nature 291, 645–8.CrossRefGoogle Scholar
Wernicke, B., & Axen, G., 1988. On the role of isostasy in the evolution of normal fault systems. Geology 16, 848–51.2.3.CO;2>CrossRefGoogle Scholar
Zitellini, N., Trincardi, F., Marani, M., & Fabbri, A., 1986. Neogene tectonics of the Northern Tyrrhenian Sea. Giornale di Geologia 48, 25–40.Google Scholar