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Authors: Pucci, S.*
Palyvos, N.*
Zabci, C.*
Pantosti, D.*
Barchi, M. R.*
Title: Coseismic ruptures and associated tectonic landforms along the Duzce segment of the North Anatolian Fault Zone
Title of journal: J. Geophys. Res.
Series/Report no.: / 111 (2006)
Publisher: Agu
Issue Date: 2006
DOI: 10.1029/2004JB003578
Keywords: Coseismic ruptures
Abstract: This paper presents a comparison between the pattern of surface ruptures produced by a single earthquake and patterns of cumulative deformation. We performed a detailed study of the 1999 earthquake coseismic ruptures and of the long-term tectonic landforms in a key area of the Du¨zce fault segment of the North Anatolian fault. We observed a scaleindependent en echelon arrangement of the coseismic surface ruptures. As a whole, the long-term geomorphic expression of the Du¨zce Fault near the 1999 ruptures is evidence of the principal slip zone at depth that accommodates the bulk of the displacement during an individual rupture event. This may stay localized through many rupture episodes with persistent geometry and kinematics. The long-term tectonic and geomorphic expression of the fault in a broader area around the 1999 ruptures defines a wider deformation zone. In fact, an old and complex fault arrangement has been mapped, partially coinciding with the 1999 rupturing fault, suggesting that the 1999 ruptures are an incomplete expression of the long-term Du¨zce fault system. The relationships between the coseismic and the old fault systems suggest an evolution of the fault pattern trough time, with a tendency to simplify a geometric complexity into a straighter, mature trace. The integrated investigation of long-term tectonic morphologies and structural pattern offers a noteworthy frame to interpret the coseismic rupture kinematics and clarifies their complexities. Moreover, to fully understand the principal slip zone at depth, this work shows the importance of the study of strain distribution pattern and evolution of surface rupturing faults.
Appears in Collections:04.04.09. Structural geology
04.04.03. Geomorphology
04.04.01. Earthquake geology and paleoseismology
Papers Published / Papers in press

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