Abstract

The Adriatic foreland of the Apennines comes ashore only in Apulia (easternmost Italy). Its southern part, our study area, lacks any structural analysis devoted to define its recent-to-active tectonics. Throughout the Quaternary, this region was affected by mild brittle deformation with rare faults, characterized by small displacement, and widespread extension joints, frequently organized in sets. Therefore, we conducted a quantitative and systematic analysis of the joint sets affecting Quaternary deposits, by applying an inversion technique ad hoc to infer the orientation and ratio of the principal stress axes, R=(sigma(2) - sigma(3))/(sigma(1) - sigma(3)). Within a general extensional regime, we recognized three deformational events of regional significance. The oldest event, constrained to the early and middle part of the Middle Pleistocene, is characterized by variable direction of extension and R between 0.64 and 0.99. The penultimate event, dated late Middle Pleistocene, is characterized by an almost uniaxial tension, with a horizontal sigma 3 striking similar to N43 degrees E; R is high, between 0.85 and 0.99. The most recent event is characterized by the low-ermost R values, that never exceed 0.47 and are frequently <0.30, indicating a sort of horizontal 'radial' extension. This event is not older than the Late Pleistocene and possibly reflects the active stress field still dominating the entire study area. (C) 2010 Elsevier Ltd. All rights reserved.

Autore Pugliese

• Mastronuzzi Giuseppe

Tutti gli autori

• MASTRONUZZI G.

Titolo volume/Rivista

Non Disponibile

Anno di pubblicazione

2011

ISSN

0264-3707

ISBN

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Numero di citazioni Wos

16

Ultimo Aggiornamento Citazioni

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Numero di citazioni Scopus

18

Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

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