Structural development of the Neogene Radicondoli–Volterra and adjoining hinterland basins in Western Tuscany (Northern Apennines, Italy)

Structural development of the Neogene Radicondoli–Volterra and adjoining hinterland basins in... This paper presents a geological–structural study of some Neogene hinterland basins of the Northern Apennines, located on the Tyrrhenian side of the chain. These basins developed on the already delineated thrust‐fold belt from middle–late Tortonian times. Their evolution has been commonly referred to an extensional tectonic regime, related to the opening of the Tyrrhenian Sea. New data have allowed us to hypothesize a different tectonic evolution for the chain, where compressive tectonics plays a major role both in the external and in the hinterland area. In this frame, the hinterland area located west of a major outcropping crustal thrust (Mid‐Tuscany Metamorphic Ridge) has been the target of a geological–structural investigation. The field mapping and structural analysis has been focused on the syntectonic sediments of the Radicondoli–Volterra basin as well as on adjoining minor basins. These basins commonly display a synclinal structure and are generally located in between basement culminations, probably corresponding to thrust anticlines. Sediments of the hinterland basins have been affected by compressive deformation and regional unconformities separate stratigraphic units due to the activity of basement thrusts. In the study area, normal faulting either accommodates the thrusting processes or post‐dates compressive deformation. A chronology of faulting and a six‐stage evolution of this area are presented, providing further insights for the Neogene tectonic evolution of the Northern Apennines. Copyright © 1998 John Wiley & Sons, Ltd. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Geological Journal Wiley

Structural development of the Neogene Radicondoli–Volterra and adjoining hinterland basins in Western Tuscany (Northern Apennines, Italy)

Geological Journal, Volume 33 (4) – Oct 1, 1998

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Publisher
Wiley
Copyright
Copyright © 1998 John Wiley & Sons, Ltd.
ISSN
0072-1050
eISSN
1099-1034
DOI
10.1002/(SICI)1099-1034(199810/12)33:4<223::AID-GJ799>3.0.CO;2-E
Publisher site
See Article on Publisher Site

Abstract

This paper presents a geological–structural study of some Neogene hinterland basins of the Northern Apennines, located on the Tyrrhenian side of the chain. These basins developed on the already delineated thrust‐fold belt from middle–late Tortonian times. Their evolution has been commonly referred to an extensional tectonic regime, related to the opening of the Tyrrhenian Sea. New data have allowed us to hypothesize a different tectonic evolution for the chain, where compressive tectonics plays a major role both in the external and in the hinterland area. In this frame, the hinterland area located west of a major outcropping crustal thrust (Mid‐Tuscany Metamorphic Ridge) has been the target of a geological–structural investigation. The field mapping and structural analysis has been focused on the syntectonic sediments of the Radicondoli–Volterra basin as well as on adjoining minor basins. These basins commonly display a synclinal structure and are generally located in between basement culminations, probably corresponding to thrust anticlines. Sediments of the hinterland basins have been affected by compressive deformation and regional unconformities separate stratigraphic units due to the activity of basement thrusts. In the study area, normal faulting either accommodates the thrusting processes or post‐dates compressive deformation. A chronology of faulting and a six‐stage evolution of this area are presented, providing further insights for the Neogene tectonic evolution of the Northern Apennines. Copyright © 1998 John Wiley & Sons, Ltd.

Journal

Geological JournalWiley

Published: Oct 1, 1998

References

  • Cover thrust reactivations related to internal basement involvement during Neogene‐Quaternary evolution of the Northern Apennines
    Boccaletti, Boccaletti; Sani, Sani
  • Crustal extension in the Northern Apennines: the transition from compression to extension in the Alpi Apuane Core Complex
    Carmignani, Carmignani; Kligfield, Kligfield
  • Emplacement of foreland thrust systems
    Cello, Cello; Nur, Nur
  • Extension in the Tyrrhenian Sea and shortening in the Apennines as a result of arc migration driven by sinking of the lithosphere
    Malinverno, Malinverno; Ryan, Ryan
  • Multiple source components in gas manifestations from north‐central Italy
    Minissale, Minissale; Evans, Evans; Magro, Magro; Vaselli, Vaselli
  • Crustal shortening and duplication of the Moho in the Northern Apennines: a view from seismic refraction data
    Ponziani, Ponziani; De Franco, De Franco; Minelli, Minelli; Biella, Biella; Federico, Federico; Pialli, Pialli
  • Growth stratal records of instantaneous and progressive limb rotation in the Precordillera thrust belt and Bermejo basin, Argentina
    Zapata, Zapata; Allmendinger, Allmendinger

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