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Authors: Andriani, T.*
Balia, R.*
Loddo, M.*
Pecorini, G.*
Tramacere, A.*
Title: Structural features of the Middle Tirso Valley (Central Sardinia - Italy) from geoelectrical and gravity data
Issue Date: Aug-2001
Series/Report no.: 44/4
Keywords: Gravity survey
geoelectrical soundings
Abstract: The Middle Tirso Valley is located in Central Sardinia and lies between two structural highs, the Marghine-Goceano chain and the Barbagia Paleozoic horst. The geological structures of the area, potentially interesting for its geothermal resources, are rather complex and dominated by two regional faults – the Marghine fault and the Nuoro fault – which affect the Palaeozoic basement and the Tertiary volcano-sedimentary deposits. Combined modelling of gravity and geoelectrical data defines the shape and extent of this Tertiary basin. The Bouguer anomaly is mainly characterized by a three-dimensional gravity low which has been named «Bolotana-Sedilo gravity low», corresponding to a structure generated by collapses attributable to transcurrent and extensional tectonic events. The down faulted zone is filled with a Tertiary low density volcano-sedimentary sequence extending southwards and overlain by Pliocene-Quaternary basalts. Another regional structure named «Tirso Fault» is proposed
Appears in Collections:04.04.09. Structural geology
04.02.05. Downhole, radioactivity, remote sensing, and other methods
04.02.04. Magnetic and electrical methods
Annals of Geophysics

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