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http://hdl.handle.net/2122/1209| 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.: | 4/44 (2001) | URI: | http://hdl.handle.net/2122/1209 | Keywords: | Gravity survey geoelectrical soundings sardinia |
Subject Classification: | 04. Solid Earth::04.02. Exploration geophysics::04.02.04. Magnetic and electrical methods 04. Solid Earth::04.02. Exploration geophysics::04.02.05. Downhole, radioactivity, remote sensing, and other methods 04. Solid Earth::04.04. Geology::04.04.09. Structural geology |
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: | Annals of Geophysics |
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