Advertisement

Active Inversion Tectonics from Algiers to Sicily

  • Alain RabauteEmail author
  • Nicolas Chamot-Rooke
Chapter
Part of the Advances in Science, Technology & Innovation book series (ASTI)

Abstract

Using an updated active faults map in the easternmost Western Mediterranean (Algeria to Calabria), plus constraints from geodesy (GPS horizontal motion) and seismology (focal mechanisms) input in a strain model, we discussed how the slow Africa-Eurasia motion (4 mm/year) is accommodated along this segment of the Mediterranean. The width of the inverted domains is variable, strain being concentrated into narrow belts in northern Algeria and north Sicily while it is distributed in Tunisia and over the Pelagian platform. The style of deformation further evolves from west to east, from pure thrusting in Algeria to distributed strike-slip in Tunisia to transtension in the Pelagian grabens. We suggest that the present-day deformation is best explained in terms of (1) accommodation of the obliquity following a strain partitioning process with dextral shear onland and en-échelon thrusts offshore northeastern Algeria, along the past trace of the STEP fault that opened the Miocene Algerian Basin, (2) thrusting offshore northern Sicily along the same STEP fault that opened the Tyrrhenian Basin in the Pliocene, (3) increasing thin-skin versus thick-skin in Tunisia as a result of inherited structures, (4) far field Ionian slab pull, strongly active at the Mio-Pliocene initiation of the Pelagian grabens and still remnant today.

Keywords

Africa/Eurasia kinematics Active tectonics Strain partitioning Inverted margin Slab pull 

References

  1. 1.
    Rabaute, A., Chamot-Rooke, N.: Active Tectonics of the Africa-Eurasia Boundary from Algiers to Calabria, Map at 1:1500000 scale with GIS database. ISBN 978-2-9548197-0-9, Geosubsight, Paris (2014)Google Scholar
  2. 2.
    Boschi, E.: A “new generation” earthquake catalogue. Ann. Geofis. 43(4), 1–12 (2000)Google Scholar
  3. 3.
    Guidoboni, E., Ferrari, G., Mariotti, D., Comastri, A., Tarabusi, G., Valensise, G.: CFTI4Med, Catalogue of Strong Earthquakes in Italy (461 B.C.-1997) and Mediterranean Area (760 B.C.-1500) INGV-SGA (2007)Google Scholar
  4. 4.
    Hamdache, M., Pelaez, J.A., Talbi, A., Casado, C.L.: A unified catalog of main earthquakes for northern Algeria from ad 856 to 2008. Seismol. Res. Lett. 81(5), 732–739 (2010)CrossRefGoogle Scholar
  5. 5.
    Haines, A.J., Holt, W.E.: A procedure for obtaining the complete horizontal motions within zones of distributed deformation from the inversion of strain-rate data. J. Geophys. Res. 98(B7), 12057–12082 (1993)CrossRefGoogle Scholar
  6. 6.
    Pérouse, E., Chamot-Rooke, N., Rabaute, A., Briole, P., Jouanne, F., Georgiev, I., Dimitrov, D.: Bridging onshore and offshore present-day kinematics of central and eastern Mediterranean: Implications for crustal dynamics and mantle flow. Geochem. Geophys. Geosyst. 13(9), 1–25 (2012)CrossRefGoogle Scholar
  7. 7.
    Govers, R., Wortel, M.J.R.: Lithosphere tearing at STEP faults: response to edges of subduction zones. Earth Planet. Sci. Lett. 236, 505–523 (2005)CrossRefGoogle Scholar
  8. 8.
    Deverchère, J., Yelles, K., Domzig, A., Mercier de Lépinay, B., Bouillin, J.-P., Gaullier, V., Bracène, R., Calais, E., Savoye, B., Kherroubi, A., Le Roy, P., Pauc, H., Dan, G.: Active thrust faulting offshore Boumerdes, Algeria, and its relations to the 2003 Mw 6.9 earthquake. Geophys. Res. Lett. 32(4), 1–5 (2005)CrossRefGoogle Scholar
  9. 9.
    Roure, F., Casero, P., Addoum, B.: Alpine inversion of the North African margin and delamination of its continental lithosphere. Tectonics 31(3), 1–28 (2012)CrossRefGoogle Scholar
  10. 10.
    Meghraoui, M., Pondrelli, S.: Active faulting and transpression tectonics along the plate boundary in North Africa. Ann. Geophys. 5, 955–967 (2013)Google Scholar
  11. 11.
    Arab, M., Rabineau, M., Déverchère, J., Bracene, R., Belhaic, D., Roure, F., Marok, A., Bouyahiaoui, B., Granjeon, D., Andriessen, P., Sage, F.: Tectonostratigraphic evolution of the eastern Algerian margin and basin from seismic data and onshore-offshore correlation. Mar. Pet. Geol. 77, 1355–1375 (2016)CrossRefGoogle Scholar
  12. 12.
    Argnani, A.: Neogene Basins in the strait of sicily (Central Mediterranean): tectonic settings and geodynamic implications. In: Boschi, E., et al. (ed.) Recent Evolution and Seismicity of the Mediterranean Region, pp. 173–187. Springer, Netherlands (1993)CrossRefGoogle Scholar
  13. 13.
    Soumaya, A., Ben Ayed, N., Delvaux, D., Ghanmi, M.: Spatial variation of present-day stress field and tectonic regime in Tunisia and surroundings from formal inversion of focal mechanisms: geodynamic implications for central Mediterranean. Tectonics 34(6), 1154–1180 (2015)CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.GeosubsightPalaiseauFrance
  2. 2.Institut des Sciences de la Terre Paris, ISTeP UMR 7193Sorbonne Université, CNRS-INSUParisFrance
  3. 3.Laboratoire de Géologie, Ecole Normale SupérieurePSL Research University, CNRS, UMR8538ParisFrance

Personalised recommendations