Lithospheric fault and kinematic decoupling of the Apennines system across the Pollino range
- Author(s)
- Claudio Chiarabba, Nicola Piana Agostinetti, Irene Bianchi
- Abstract
A persistent seismic gap is hypothesized in the Pollino area (southern Italy), at the boundary between the Apennines and the Calabrian arc. Presently, seismic swarms are active in the gap area, creating concerns for possible future large earthquakes. In this study, we model the deep Earth structure across the Pollino range to give new insights on the kinematics and tectonics of this enigmatic area. Migrated receiver function profiles show a subvertical lithospheric discontinuity, delineated by an abrupt change in Moho depth and mantle fabrics across the range. The lithospheric-scale discontinuity bounds the area of earthquake swarm activity and likely decouples the delamination-related extension of the Apennines from the extensional collapse of the Calabrian fore arc. This large-scale discontinuity implies that the normal faults are segmented across the range, limiting the lateral extent of faults where future earthquakes might occur.
- Organisation(s)
- Department of Meteorology and Geophysics
- External organisation(s)
- Istituto Nazionale di Fisica Nucleare (INFN), Roma, Dublin Institute for Advanced Studies
- Journal
- Geophysical Research Letters
- Volume
- 43
- Pages
- 3201-3207
- No. of pages
- 7
- ISSN
- 0094-8276
- DOI
- https://doi.org/10.1002/2015GL067610
- Publication date
- 04-2016
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 105126 Applied geophysics, 105122 Seismic, 105124 Tectonics, 105102 General geophysics
- Keywords
- ASJC Scopus subject areas
- Geophysics, Earth and Planetary Sciences(all)
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/lithospheric-fault-and-kinematic-decoupling-of-the-apennines-system-across-the-pollino-range(a9a299fe-3c1f-43c1-8ee8-4e7f12fb7c80).html