Articles | Volume 13, issue 8
Research article
30 Aug 2022
Research article |  | 30 Aug 2022

Structural characterization and K–Ar illite dating of reactivated, complex and heterogeneous fault zones: lessons from the Zuccale Fault, Northern Apennines

Giulio Viola, Giovanni Musumeci, Francesco Mazzarini, Lorenzo Tavazzani, Manuel Curzi, Espen Torgersen, Roelant van der Lelij, and Luca Aldega

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Subject area: Tectonic plate interactions, magma genesis, and lithosphere deformation at all scales | Editorial team: Structural geology and tectonics, paleoseismology, rock physics, experimental deformation | Discipline: Structural geology
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Cited articles

Aldega, L., Viola, G., Casas-Sainz, A., Marcén, M., Román-Berdiel, T., and Lelij, R.: Unravelling multiple thermo-tectonic events accommodated by crustal-scale faults in northern Iberia, Spain: Insights from K-Ar dating of clay gouges, Tectonics, 38, 3629–3651,, 2019. 
Barberi, F., Innocenti, F., and Ricci, C. A.: Il complesso scistoso di Capo Calamita (Isola d'Elba), Atti Della Società Toscana Di Scienze Naturali Residente a Pisa, Memorie Ser. A, 72, 579–617, 1967. 
Barboni, M., Annen, C., and Schoene, B.: Evaluating the construction and evolution of upper crustal magma reservoirs with coupled U / Pb zircon geochronology and thermal modeling: A case study from the Mt. Capanne pluton (Elba, Italy), Earth Planet. Sc. Lett., 432, 436–448,, 2015. 
Bedford, J. D., Faulkner, D. R., and Lapusta, N.: Fault rock heterogeneity can produce fault weakness and reduce fault stability, Nat. Commun., 13, 326,, 2022. 
Bianco, C., Brogi, A., Caggianelli, A., Giorgetti, G., Liotta, D., and Meccheri, M.: HP-LT metamorphism in Elba Island: Implications for the geodynamic evolution of the inner Northern Apennines (Italy), J. Geodyn., 91, 13–25,, 2015. 
Short summary
A structural-geochronological approach helps to unravel the Zuccale Fault's architecture. By mapping its internal structure and dating some of its fault rocks, we constrained a deformation history lasting 20 Myr starting at ca. 22 Ma. Such long activity is recorded by now tightly juxtaposed brittle structural facies, i.e. different types of fault rocks. Our results also have implications on the regional evolution of the northern Apennines, of which the Zuccale Fault is an important structure.