Aeromagnetic evidence for the rotation of Sardinia (Mediterranean Sea): comparison with the paleomagnetic measurements

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Scientific paper

The aeromagnetic survey of Sardinia (western Mediterranean) delineated a large magnetic anomaly located in the western part of the island. The shape of the anomaly is improved and simplified by upward continuation, and modelling in terms of three-dimensional structure gives a westward remanent magnetization. Some tests have been carried out to suppress ambiguities on the magnetic dual aspect ``magnetization distribution-shape of sources''. The optimal declination obtained after a few testings is 30° west which is ascribed to the rotation of Sardinia. This value confirms the results provided by paleomagnetic investigations and is significant because it characterizes a large and deep-rooted structure involved in the rotation of Sardinia. Our results thus illustrate another interesting application of aeromagnetic surveys.

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