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  Formation and Persistence of Extensional Internally Drained Basins: The Case of the Fucino Basin (Central Apennines, Italy)

Lanari, R., Faccenna, C., Benedetti, L., Sembroni, A., Bellier, O., Menichelli, I., Primerano, P., Molin, P. (2021): Formation and Persistence of Extensional Internally Drained Basins: The Case of the Fucino Basin (Central Apennines, Italy). - Tectonics, 40, 6, e2020TC006442.
https://doi.org/10.1029/2020TC006442

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 Creators:
Lanari, R.1, Author
Faccenna, Claudio2, Author              
Benedetti, L.1, Author
Sembroni, A.1, Author
Bellier, O.1, Author
Menichelli, I.1, Author
Primerano, P.1, Author
Molin, P.1, Author
Affiliations:
1External Organizations, ou_persistent22              
20 Pre-GFZ, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_146023              

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Free keywords: central Apennines Fucino basin sedimentary load slip direction
 Abstract: The interaction between sedimentation/erosion and faulting represents one of the most intriguing topics in landscape and tectonics evolution. Only few studies have been able to document the feedback between faulting and sedimentary loading from field observations. Here, we focus on how sediment loading/unloading influences the dynamics of fault systems in the Fucino basin, in the Central Apennines (Italy). The Fucino basin represents a remarkable case study with respect to the other main extensional basins in the Apennines because of its large dimension, square shape, significant sediment thickness, and its endorheic nature throughout its evolution. We present a detailed structural and geomorphologic analysis of the Fucino basin and its surroundings, investigating the kinematic and geometry of each main fault strand. The slickenlines analysis reveals multiple families of slip-vectors and timing of activity, suggesting a change in extension slip-direction from N240° to N200° during middle Pleistocene. Using a local isostatic model, we estimate that up to the 30% of the vertical geological displacement of the faults, which overall ranges from 0.5 to 2.5 km, is related to the sediment loading/unloading. We demonstrate a positive feedback between sedimentation and faulting which may also lead to a reorganization in fault kinematics related to a significant increase in vertical stress. We propose a conceptual model for the permanent endorheic configuration of the Fucino basin, which includes the effect of sediment loading.

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Language(s): eng - English
 Dates: 2021-06-172021
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1029/2020TC006442
 Degree: -

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Title: Tectonics
Source Genre: Journal, SCI, Scopus
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Publ. Info: -
Pages: - Volume / Issue: 40 (6) Sequence Number: e2020TC006442 Start / End Page: - Identifier: ISSN: 0278-7407
ISSN: 1944-9194
CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/journals469
Publisher: American Geophysical Union (AGU)