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Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/1119

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Title: Comparison between active stress field and tectonic structures in Northern Italy, Lombardy Region
Authors: Pierdominici, S.*
Mariucci, M. T.*
Montone, P.*
Cesaro, M.*
Keywords: borehole breakout analysis
active stress field
tectonic structures
Po Plain
Italy
Issue Date: Dec-2005
Series/Report no.: 48 (6)
Abstract: The aim of this work is to understand the complex pattern of active stress field orientations revealed by borehole breakout analysis with respect to the tectonic structures in a wide region of Northern Italy. The area is located in the central-western part of the Po Plain between the south verging Southern Alps structures and the north verging buried folds and thrusts of the Monferrato and Emilia arcs. Little information concerning the active stress field is available because of the low seismicity level and the thick layer of sediments that covers the entire zone. A detailed borehole breakout analysis has been performed in 36 wells with depths ranging from 2.2 to 7.3 km, whose data have been supplied by Eni. Breakout analysis determined the minimum and maximum horizontal stress directions (Shmin and SHmax). The results show a very complex pattern, pointing out that the stress field is not uniform. In this area the regional stress field seems not «strong» enough, compared to the local one, so most of the wells detect only the local field. This work contributes to clarify the various Shmin orientations observed in this area, pointing out at wide scale, a general compression in NNE-SSW direction in this complex region.
URI: http://hdl.handle.net/2122/1119
Appears in Collections:Annals of Geophysics
Papers Published / Papers in press
Manuscripts
04.07.05. Stress
05.02.05. Collections
04.07.07. Tectonics

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