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Extensional tectonics on Sardinia (Italy): insights into the arc–back-arc transitional regime
Author(s)
Language
English
Obiettivo Specifico
3.4. Geomagnetismo
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
4 / 356 (2002)
Publisher
Elsevier
Pages (printed)
213-232
Issued date
October 24, 2002
Abstract
Although the tectonic features and stress regime typical for accretionary complexes and back-arc domains have been widely documented so far, few are known on the transitional zone separating these two systems. Here we report on structural analysis and anisotropy of magnetic susceptibility (AMS) results from Eocene–Pliocene sediments exposed in western Sardinia. From late Oligocene to middle Miocene, the studied area was located between the Alpine–Apennine wedge to the east, which was undergoing shortening and accretion, and the Liguro–Provenc al basin, undergoing extension and spreading. We find that, prior
to the formation of the Liguro–Provenc al basin, the middle Eocene–lower Oligocene sediments cropping out at the southwesternmost edge of Sardinia were subjected to NE–SW shortening (in present-day coordinates), in agreement with recently reported geological information. Conversely, the upper Oligocene–Pliocene sedimentary sequences record a different evolutionary stage of extensional processes. Upper Oligocene–middle–upper Burdigalian sediments clearly show a N–S-oriented magnetic lineation that can be related to extensional direction along the prevalent E–W-oriented normal faults. On the other hand, no magnetic lineation has been detected in upper Burdigalian–Serravallian sediments, which mark the end of the first rifting process in Sardinia, which likely coincides with the rift-to-drift transition at the core of the Liguro–Provençal basin.
Finally, a NE–SW extension is observed in two Tortonian–Pliocene sites at the northwestern margin of the NNW–SSE-oriented Campidano graben. Our study confirms that AMS may represent a valuable strain-trajectory proxy and significantly help to unravel the characters of temporally superimposed tectonic events.
to the formation of the Liguro–Provenc al basin, the middle Eocene–lower Oligocene sediments cropping out at the southwesternmost edge of Sardinia were subjected to NE–SW shortening (in present-day coordinates), in agreement with recently reported geological information. Conversely, the upper Oligocene–Pliocene sedimentary sequences record a different evolutionary stage of extensional processes. Upper Oligocene–middle–upper Burdigalian sediments clearly show a N–S-oriented magnetic lineation that can be related to extensional direction along the prevalent E–W-oriented normal faults. On the other hand, no magnetic lineation has been detected in upper Burdigalian–Serravallian sediments, which mark the end of the first rifting process in Sardinia, which likely coincides with the rift-to-drift transition at the core of the Liguro–Provençal basin.
Finally, a NE–SW extension is observed in two Tortonian–Pliocene sites at the northwestern margin of the NNW–SSE-oriented Campidano graben. Our study confirms that AMS may represent a valuable strain-trajectory proxy and significantly help to unravel the characters of temporally superimposed tectonic events.
References
Assorgia, A., Barca, S., Spano, C., 1997. A synthesis on the Cenozoic
stratigraphic, tectonic and volcanic evolution in Sardinia
(Italy). Boll. Soc. Geol. Ital. 116, 407– 420.
Barca, S., Costamagna, L.G., 1997. Compressive ‘‘Alpine’’ tectonics
in western Sardinia: geodynamic consequences. C.R. Acad.
Sci., Paris 325, 791–797.
Barca, S., Costamagna, L.G., 2000. Il Bacino paleogenico del Sulcis–
Iglesiente (Sardegna SW): nuovi dati stratigrafico– strutturali
per un modello geodinamico nell’ambito dell’orogenesi
pirenaica. Boll. Soc. Geol. Ital. 119, 497– 515.
Beccaluva, L., Civetta, L., Maciotta, G., Ricci, C.A., 1985. Geochronology
in Sardinia: results and problems. Rend. Soc. Ital.
Mineral. Petrol. 40, 57–72.
Beccaluva, L., Brotzu, P., Macciotta, G., Morbidelli, L., Serri, G.,
Traversa, G., 1989. Cainozoic tectono-magmatic evolution and
inferred mantle sources in the Sardo-Tyrrhenian area. In: Boriani,
A., Bonafede, M., Piccardo, G.B., Vai, G.B. (Eds.), The
Lithosphere in Italy. Advances in Science Research. Accademia
Nazionale dei Lincei, Rome, pp. 229– 248.
Bellon, H., Coulon, C., Edel, J.B., 1977. Le de´placement de la
Sardaigne. Synthe`se des donnee´s ge´ochronologiques, magmatiques,
et pale´omagne´tiques. Bull. Soc. Ge´ol. Fr. 19, 825– 831.
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.
Carmignani, L., Barca, S., Disperati, L., Fantozzi, P., Funedda, A.,
Oggiano, G., Pasci, S., 1994. Tertiary compression and extension
in the Sardinian basement. Boll. Geofis. Teor. Appl. 36,
141– 144.
Carmignani, L., Decandia, F.A., Disperati, L., Fantozzi, P., Lazzarotto,
A., Liotta, D., Oggiano, G., 1995. Relationships between
the tertiary structural evolution of the Sardinia –Corsica –
Provenc al domain and the northern Apennines. Terra Nova 7,
128– 137.
Carmignani, L., Funedda, A., Oggiano, G., Padsci, S., 1999. Una
nuova interpretazione strutturale dei bacini terziari del Cixerri e
di Narcao (Sardegna Occidentale). Abstract meeting GeoItalia,
2jForum FIST, vol. 1, pp. 415– 417.
Cataldi, R., Mongelli, F., Squarci, P., Taffi, L., Zito, G., Calore, C.,
1995. Geothermal ranking of Italian territory. Geothermics 24
(1), 115– 129.
Chamot-Rooke, N., Gaulier, J.-M., Jestin, F., 1999. Constraints on
Moho depth and crustal thickness in the Liguro – Provenc al
basin from a 3D gravity inversion: geodynamic implications.
In: Durand, B., Jolivet, L., Horvath, F., Seranne, M. (Eds.),
The Mediterranean Basins: Tertiary Extension Within the Alpine
Orogen. Geol. Soc. London, Spec. Publ., vol. 156, pp.
37– 61.
Cherchi, A., 1983. Presenza di Ilerdiano a Alveolinidae e Orbitolinidae
nel bacino paleogenico del Sulcis (Sardegna SW). Boll.
Soc. Sarda Sci. Nat. 22, 107– 119.
Cherchi, A., Montadert, L., 1982. Oligo-Miocene rift of Sardinia
and the early history of the western Mediterranean basin. Nature
298, 736– 739.
Cipollari, P., Cosentino, D., 1997. Caratteristiche stratigrafiche della
Formazione della Marmilla (Miocene inferiore) nell’area di Collinas-
Villanova Forru (Sardegna centro-meridionale). Abstract
meeting ‘‘La Fossa Sarda’’ nell’ambito dell’evoluzione geodinamica
cenozoica del Mediterraneo Occidentale, Villanovaforru,
1997, pp. 78– 79.
Deino, A., Gattacceca, J., Rizzo, R., Montanari, A., 2001. 40Ar/39Ar
dating and paleomagnetism of the Miocene volcanic succession
of Monte Furru (western Sardinia): implications for the rotation
history of the Corsica– Sardinia microplate. Geophys. Res. Lett.
28 (17), 3373– 3376.
Francolini, L., Mazzei, R., 1991. Inquadramento bio-crono-stratigrafico
delle tufiti marine del Miocene inferiore affioranti
nell’area di Castelsardo (Sardegna occidentale). Atti Soc. Toscana
Sci. Nat. Resid. Pisa, Mem., Serie A 98, 327– 338.
Funedda, A., Oggiano, G., Pasci, S., 2000. The Logudoro basin: a
key area for the tertiary tectono-sedimentary evolution of North
Sardinia. Boll. Soc. Geol. Ital. 119, 31– 38.
Graham, J.W., 1966. Significance of magnetic anisotropy in Appalachian
sedimentary rocks. Am. Geophys. Union Monogr. 10,
627–648.
Jarrard, R.D., 1986. Relations among subduction parameters. Rev.
Geophys. 24, 217– 284.
Jelinek, V., 1978. Statistical processing of anisotropy of magnetic
susceptibility measured on a group of specimens and its applications.
Stud. Geophys. Geod. 22, 50– 62.
Jelinek, V., 1981. Characterization of the magnetic fabrics of rocks.
Tectonophysics 79, 63– 67.
Jolivet, L., Faccenna, C., 2000. Mediterranean extension and the
Africa– Eurasia collision. Tectonics 19 (6), 1095– 1106.
Jolivet, L., Faccenna, C., Goffe´, B., et al., 1998. Midcrustal shear
zones in postorogenic extension: example from the northern
Tyrrhenian Sea. J. Geophys. Res. 103 (B6), 12123– 12161.
Kligfield, R., Owens, W.H., Lowrie, W., 1981. Magnetic susceptibility
anisotropy, strain, and progressive deformation in Permian
sediments from the Maritime Alps (France). Earth Planet. Sci.
Lett. 55, 181–189.
Letouzey, J., Wanenesson, J., Cherchi, A., 1982. Apport de la microtectonique
au problem de la rotation du bloc corso– sarde.
C.R. Acad. Sci., Paris 294, 595–602.
Lowrie, W., Hirt, A.M., 1987. Anisotropy of magnetic susceptibility
in the Scaglia Rossa pelagic limestone. Earth Planet. Sci. Lett.
82, 349–356.
Malinverno, A., Ryan, W.B.F., 1986. Extension in the Tyrrhenian
Sea and shortening in the Apennines as result of arc migration
driven by sinking of the lithosphere. Tectonics 5, 227– 245.
Martini, P., Oggiano, G., Mazzi, R., 1992. Siliciclastic– carbonate
sequences of Miocene grabens in northern Sardinia, Western
Mediterranean Sea. Sedim. Geol. 76, 63–78.
Mattei, M., Sagnotti, L., Faccenna, C., Funiciello, R., 1997. Magnetic
fabric of weakly deformed clayey sediments in the Italian
peninsula: relationships with compressional and extensional tectonics.
Tectonophysics 271, 107– 122.
Mattei, M., Speranza, F., Argentieri, A., Rossetti, F., Sagnotti, L.,
Funiciello, R., 1999. Extensional tectonics in the Amantea basin
(Calabria, Italy): a comparison between structural and magnetic
anisotropy data. Tectonophysics 307, 33– 49.
Nakamura, K., Uyeda, S., 1980. Stress gradient in back arc regions
and plate subduction. J. Geophys. Res. 85, 6419– 6428.
Oggiano, G., Pasci, S., Funedda, A., 1995. Il Bacino di Chilivani-
Berchidda: un esempio di struttura transtensiva. Possibili relazioni
con la geodinamica Cenozoica del Mediterraneo Occidentale.
Boll. Soc. Geol. Ital. 114, 465– 475.
Pare´s, J.M., van der Pluijm, B.A., Dinare`s-Turell, J., 1999. Evolution
of magnetic fabric during incipient deformation of mudrocks
(Pyrenees, northern Spain). Tectonophysics 307, 1– 14.
Pasci, S., 1997. Tertiary transcurrent tectonics of north-central Sardinia.
Bull. Soc. Geol. France 168, 301– 312.
Patacca, E., Sartori, R., Scandone, P., 1990. Tyrrhenian basin and
Apenninic arcs: kinematic relations since late Tortonian times.
Mem. Soc. Geol. Ital. 45, 425– 451.
Rochette, P., Jackson, M., Aubourg, C., 1992. Rock magnetism and
the interpretation of anisotropy of magnetic susceptibility. Rev.
Geophys. 30 (3), 209– 226.
Rossetti, F., Faccenna, C., Goffe´, B., Monie´, P., Argentieri, A.,
Funiciello, R., Mattei, M., 2001. Alpine structural and metamorphic
signature of the Sila Piccola Massif nappe stack (Calabria,
Italy): insights for the tectonic evolution of the Calabrian Arc.
Tectonics 20, 112– 133.
Sagnotti, L., Speranza, F., 1993. Magnetic fabric analysis of the
Plio-Pleistocene clay units of the Sant’Arcangelo basin, southern
Italy. Phys. Earth Planet. Inter. 77, 165–176.
Sagnotti, L., Faccenna, C., Funiciello, R., Mattei, M., 1994. Magnetic
fabric and structural setting of Plio-Pleistocene clayey
units in an extensional regime: the Tyrrhenian margin of central
Italy. J. Struct. Geol. 16, 1243– 1257.
Sagnotti, L., Speranza, F., Winkler, A., Mattei, M., Funiciello, R.,
1998. Magnetic fabric of clay sediments from the external northern
Apennines (Italy). Phys. Earth Planet. Inter. 105, 73–93.
Scheepers, P.J.J., Langereis, C.G., 1994. Magnetic fabric of Pleistocene
clays from the Tyrrhenian arc: a magnetic lineation induced
in the final stage of the middle Pleistocene compressive
event. Tectonics 13 (5), 1190– 1200.
Selvaggi, G., Chiarabba, C., 1995. Seismicity and P-wave velocity
image of the southern Tyrrhenian subduction zone. Geophys. J.
Int. 121, 818–826.
Seranne, M., 1999. The Gulf of Lion continental margin (NW
Mediterranean) revisited by IBS: an overview. In: Durand, B.,
Mascle, A., Jolivet, L., Horva`th, F., Se´ranne, M. (Eds.), The
Mediterranean basins: tertiary extension within the Alpine orogen.
Geol. Soc. London, Spec. Publ., vol. 156, pp. 21–53.
Sowerbutts, A.A., Underhill, J.R., 1998. Sedimentary response to
intra-arc extension: controls on Oligo-Miocene deposition, Sarcidano
sub-basin, Sardinia. J. Geol. Soc. London 155, 491– 508.
Speranza, F., 1999. Paleomagnetism and the Corsica– Sardinia rotation:
a short review. Boll. Soc. Geol. Ital. 118, 537– 543.
Speranza, F., Maniscalco, R., Mattei, M., Di Stefano, A., Butler,
R.W.H., Funiciello, R., 1999. Timing and magnitude of rotations in the frontal thrust system of southwestern Sicily. Tectonics
18 (6), 1178– 1197.
Thomas, B., Gennesseaux, M., 1986. A two stages rifting in the
basins of Corsica– Sardinia straits. Mar. Geol. 72, 225– 239.
Uyeda, S., Kanamori, H., 1979. Backarc opening and the mode of
subduction. J. Geophys. Res. 84, 1049– 1106.
Van der Voo, R., 1993. Paleomagnetism of the Atlantic, Thethys, and
Iapetus Oceans. Cambridge Univ. Press, Cambridge, 411 pp.
Vigliotti, L., Langenheim, V.E., 1995. When did Sardinia stop rotating?
New paleomagnetic results. Terra Nova 7, 424– 435.
Winkler, A., Florindo, F., Sagnotti, L., Sarti, G., 1996. Inverse to
normal magnetic fabric transition in an upper Miocene marly
sequence from Tuscany (Italy). Geophys. Res. Lett. 23 (9),
909– 912.
stratigraphic, tectonic and volcanic evolution in Sardinia
(Italy). Boll. Soc. Geol. Ital. 116, 407– 420.
Barca, S., Costamagna, L.G., 1997. Compressive ‘‘Alpine’’ tectonics
in western Sardinia: geodynamic consequences. C.R. Acad.
Sci., Paris 325, 791–797.
Barca, S., Costamagna, L.G., 2000. Il Bacino paleogenico del Sulcis–
Iglesiente (Sardegna SW): nuovi dati stratigrafico– strutturali
per un modello geodinamico nell’ambito dell’orogenesi
pirenaica. Boll. Soc. Geol. Ital. 119, 497– 515.
Beccaluva, L., Civetta, L., Maciotta, G., Ricci, C.A., 1985. Geochronology
in Sardinia: results and problems. Rend. Soc. Ital.
Mineral. Petrol. 40, 57–72.
Beccaluva, L., Brotzu, P., Macciotta, G., Morbidelli, L., Serri, G.,
Traversa, G., 1989. Cainozoic tectono-magmatic evolution and
inferred mantle sources in the Sardo-Tyrrhenian area. In: Boriani,
A., Bonafede, M., Piccardo, G.B., Vai, G.B. (Eds.), The
Lithosphere in Italy. Advances in Science Research. Accademia
Nazionale dei Lincei, Rome, pp. 229– 248.
Bellon, H., Coulon, C., Edel, J.B., 1977. Le de´placement de la
Sardaigne. Synthe`se des donnee´s ge´ochronologiques, magmatiques,
et pale´omagne´tiques. Bull. Soc. Ge´ol. Fr. 19, 825– 831.
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.
Carmignani, L., Barca, S., Disperati, L., Fantozzi, P., Funedda, A.,
Oggiano, G., Pasci, S., 1994. Tertiary compression and extension
in the Sardinian basement. Boll. Geofis. Teor. Appl. 36,
141– 144.
Carmignani, L., Decandia, F.A., Disperati, L., Fantozzi, P., Lazzarotto,
A., Liotta, D., Oggiano, G., 1995. Relationships between
the tertiary structural evolution of the Sardinia –Corsica –
Provenc al domain and the northern Apennines. Terra Nova 7,
128– 137.
Carmignani, L., Funedda, A., Oggiano, G., Padsci, S., 1999. Una
nuova interpretazione strutturale dei bacini terziari del Cixerri e
di Narcao (Sardegna Occidentale). Abstract meeting GeoItalia,
2jForum FIST, vol. 1, pp. 415– 417.
Cataldi, R., Mongelli, F., Squarci, P., Taffi, L., Zito, G., Calore, C.,
1995. Geothermal ranking of Italian territory. Geothermics 24
(1), 115– 129.
Chamot-Rooke, N., Gaulier, J.-M., Jestin, F., 1999. Constraints on
Moho depth and crustal thickness in the Liguro – Provenc al
basin from a 3D gravity inversion: geodynamic implications.
In: Durand, B., Jolivet, L., Horvath, F., Seranne, M. (Eds.),
The Mediterranean Basins: Tertiary Extension Within the Alpine
Orogen. Geol. Soc. London, Spec. Publ., vol. 156, pp.
37– 61.
Cherchi, A., 1983. Presenza di Ilerdiano a Alveolinidae e Orbitolinidae
nel bacino paleogenico del Sulcis (Sardegna SW). Boll.
Soc. Sarda Sci. Nat. 22, 107– 119.
Cherchi, A., Montadert, L., 1982. Oligo-Miocene rift of Sardinia
and the early history of the western Mediterranean basin. Nature
298, 736– 739.
Cipollari, P., Cosentino, D., 1997. Caratteristiche stratigrafiche della
Formazione della Marmilla (Miocene inferiore) nell’area di Collinas-
Villanova Forru (Sardegna centro-meridionale). Abstract
meeting ‘‘La Fossa Sarda’’ nell’ambito dell’evoluzione geodinamica
cenozoica del Mediterraneo Occidentale, Villanovaforru,
1997, pp. 78– 79.
Deino, A., Gattacceca, J., Rizzo, R., Montanari, A., 2001. 40Ar/39Ar
dating and paleomagnetism of the Miocene volcanic succession
of Monte Furru (western Sardinia): implications for the rotation
history of the Corsica– Sardinia microplate. Geophys. Res. Lett.
28 (17), 3373– 3376.
Francolini, L., Mazzei, R., 1991. Inquadramento bio-crono-stratigrafico
delle tufiti marine del Miocene inferiore affioranti
nell’area di Castelsardo (Sardegna occidentale). Atti Soc. Toscana
Sci. Nat. Resid. Pisa, Mem., Serie A 98, 327– 338.
Funedda, A., Oggiano, G., Pasci, S., 2000. The Logudoro basin: a
key area for the tertiary tectono-sedimentary evolution of North
Sardinia. Boll. Soc. Geol. Ital. 119, 31– 38.
Graham, J.W., 1966. Significance of magnetic anisotropy in Appalachian
sedimentary rocks. Am. Geophys. Union Monogr. 10,
627–648.
Jarrard, R.D., 1986. Relations among subduction parameters. Rev.
Geophys. 24, 217– 284.
Jelinek, V., 1978. Statistical processing of anisotropy of magnetic
susceptibility measured on a group of specimens and its applications.
Stud. Geophys. Geod. 22, 50– 62.
Jelinek, V., 1981. Characterization of the magnetic fabrics of rocks.
Tectonophysics 79, 63– 67.
Jolivet, L., Faccenna, C., 2000. Mediterranean extension and the
Africa– Eurasia collision. Tectonics 19 (6), 1095– 1106.
Jolivet, L., Faccenna, C., Goffe´, B., et al., 1998. Midcrustal shear
zones in postorogenic extension: example from the northern
Tyrrhenian Sea. J. Geophys. Res. 103 (B6), 12123– 12161.
Kligfield, R., Owens, W.H., Lowrie, W., 1981. Magnetic susceptibility
anisotropy, strain, and progressive deformation in Permian
sediments from the Maritime Alps (France). Earth Planet. Sci.
Lett. 55, 181–189.
Letouzey, J., Wanenesson, J., Cherchi, A., 1982. Apport de la microtectonique
au problem de la rotation du bloc corso– sarde.
C.R. Acad. Sci., Paris 294, 595–602.
Lowrie, W., Hirt, A.M., 1987. Anisotropy of magnetic susceptibility
in the Scaglia Rossa pelagic limestone. Earth Planet. Sci. Lett.
82, 349–356.
Malinverno, A., Ryan, W.B.F., 1986. Extension in the Tyrrhenian
Sea and shortening in the Apennines as result of arc migration
driven by sinking of the lithosphere. Tectonics 5, 227– 245.
Martini, P., Oggiano, G., Mazzi, R., 1992. Siliciclastic– carbonate
sequences of Miocene grabens in northern Sardinia, Western
Mediterranean Sea. Sedim. Geol. 76, 63–78.
Mattei, M., Sagnotti, L., Faccenna, C., Funiciello, R., 1997. Magnetic
fabric of weakly deformed clayey sediments in the Italian
peninsula: relationships with compressional and extensional tectonics.
Tectonophysics 271, 107– 122.
Mattei, M., Speranza, F., Argentieri, A., Rossetti, F., Sagnotti, L.,
Funiciello, R., 1999. Extensional tectonics in the Amantea basin
(Calabria, Italy): a comparison between structural and magnetic
anisotropy data. Tectonophysics 307, 33– 49.
Nakamura, K., Uyeda, S., 1980. Stress gradient in back arc regions
and plate subduction. J. Geophys. Res. 85, 6419– 6428.
Oggiano, G., Pasci, S., Funedda, A., 1995. Il Bacino di Chilivani-
Berchidda: un esempio di struttura transtensiva. Possibili relazioni
con la geodinamica Cenozoica del Mediterraneo Occidentale.
Boll. Soc. Geol. Ital. 114, 465– 475.
Pare´s, J.M., van der Pluijm, B.A., Dinare`s-Turell, J., 1999. Evolution
of magnetic fabric during incipient deformation of mudrocks
(Pyrenees, northern Spain). Tectonophysics 307, 1– 14.
Pasci, S., 1997. Tertiary transcurrent tectonics of north-central Sardinia.
Bull. Soc. Geol. France 168, 301– 312.
Patacca, E., Sartori, R., Scandone, P., 1990. Tyrrhenian basin and
Apenninic arcs: kinematic relations since late Tortonian times.
Mem. Soc. Geol. Ital. 45, 425– 451.
Rochette, P., Jackson, M., Aubourg, C., 1992. Rock magnetism and
the interpretation of anisotropy of magnetic susceptibility. Rev.
Geophys. 30 (3), 209– 226.
Rossetti, F., Faccenna, C., Goffe´, B., Monie´, P., Argentieri, A.,
Funiciello, R., Mattei, M., 2001. Alpine structural and metamorphic
signature of the Sila Piccola Massif nappe stack (Calabria,
Italy): insights for the tectonic evolution of the Calabrian Arc.
Tectonics 20, 112– 133.
Sagnotti, L., Speranza, F., 1993. Magnetic fabric analysis of the
Plio-Pleistocene clay units of the Sant’Arcangelo basin, southern
Italy. Phys. Earth Planet. Inter. 77, 165–176.
Sagnotti, L., Faccenna, C., Funiciello, R., Mattei, M., 1994. Magnetic
fabric and structural setting of Plio-Pleistocene clayey
units in an extensional regime: the Tyrrhenian margin of central
Italy. J. Struct. Geol. 16, 1243– 1257.
Sagnotti, L., Speranza, F., Winkler, A., Mattei, M., Funiciello, R.,
1998. Magnetic fabric of clay sediments from the external northern
Apennines (Italy). Phys. Earth Planet. Inter. 105, 73–93.
Scheepers, P.J.J., Langereis, C.G., 1994. Magnetic fabric of Pleistocene
clays from the Tyrrhenian arc: a magnetic lineation induced
in the final stage of the middle Pleistocene compressive
event. Tectonics 13 (5), 1190– 1200.
Selvaggi, G., Chiarabba, C., 1995. Seismicity and P-wave velocity
image of the southern Tyrrhenian subduction zone. Geophys. J.
Int. 121, 818–826.
Seranne, M., 1999. The Gulf of Lion continental margin (NW
Mediterranean) revisited by IBS: an overview. In: Durand, B.,
Mascle, A., Jolivet, L., Horva`th, F., Se´ranne, M. (Eds.), The
Mediterranean basins: tertiary extension within the Alpine orogen.
Geol. Soc. London, Spec. Publ., vol. 156, pp. 21–53.
Sowerbutts, A.A., Underhill, J.R., 1998. Sedimentary response to
intra-arc extension: controls on Oligo-Miocene deposition, Sarcidano
sub-basin, Sardinia. J. Geol. Soc. London 155, 491– 508.
Speranza, F., 1999. Paleomagnetism and the Corsica– Sardinia rotation:
a short review. Boll. Soc. Geol. Ital. 118, 537– 543.
Speranza, F., Maniscalco, R., Mattei, M., Di Stefano, A., Butler,
R.W.H., Funiciello, R., 1999. Timing and magnitude of rotations in the frontal thrust system of southwestern Sicily. Tectonics
18 (6), 1178– 1197.
Thomas, B., Gennesseaux, M., 1986. A two stages rifting in the
basins of Corsica– Sardinia straits. Mar. Geol. 72, 225– 239.
Uyeda, S., Kanamori, H., 1979. Backarc opening and the mode of
subduction. J. Geophys. Res. 84, 1049– 1106.
Van der Voo, R., 1993. Paleomagnetism of the Atlantic, Thethys, and
Iapetus Oceans. Cambridge Univ. Press, Cambridge, 411 pp.
Vigliotti, L., Langenheim, V.E., 1995. When did Sardinia stop rotating?
New paleomagnetic results. Terra Nova 7, 424– 435.
Winkler, A., Florindo, F., Sagnotti, L., Sarti, G., 1996. Inverse to
normal magnetic fabric transition in an upper Miocene marly
sequence from Tuscany (Italy). Geophys. Res. Lett. 23 (9),
909– 912.
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