Electrical features of deep structures of Southern Tuscany (Italy)
Main Article Content
Abstract
Over the last six years, magnetotelluric data were acquired at 86 sites covering much of Southern Tuscany. Twenty-four of these sites were acquired in single-site or local-reference mode, whereas 62 were aquired in very-remote-reference mode, with a remote site located on Capraia Island í 40 km from the cost í where the cultural noise is very low. The data modelling showed that Southern Tuscany is characterized by a fairly uniform middle-lower crust that has a resistivity of a few thousand W ·m below 10 km. At shallower depths in the crust, the resistivity is closer to values around 500 W ·m. This uniformity is interrupted only below the Larderello and Mt. Amiata geothermal fields where deep conductive bodies are believed to exist. A general anomalous condition can hence be depicted for this region, with low resistivity values typical of those in tectonically active areas as opposed to more resistive values typical in continental areas. These data and those from other geophysical techniques suggest that these conductive zones may be associated with hot material coming from deeper sources below the geothermal areas.
Article Details
How to Cite
Fiordelisi, A., Mackie, R., Manzella, A., Watts, D. and Zaja, A. (1998) “Electrical features of deep structures of Southern Tuscany (Italy)”, Annals of Geophysics, 41(3). doi: 10.4401/ag-4351.
Issue
Section
OLD
Open-Access License
No Permission Required
Istituto Nazionale di Geofisica e Vulcanologia applies the Creative Commons Attribution License (CCAL) to all works we publish.
Under the CCAL, authors retain ownership of the copyright for their article, but authors allow anyone to download, reuse, reprint, modify, distribute, so long as the original authors and source are cited. No permission is required from the authors or the publishers.
In most cases, appropriate attribution can be provided by simply citing the original article.
If the item you plan to reuse is not part of a published article (e.g., a featured issue image), then please indicate the originator of the work, and the volume, issue, and date of the journal in which the item appeared. For any reuse or redistribution of a work, you must also make clear the license terms under which the work was published.
This broad license was developed to facilitate open access to, and free use of, original works of all types. Applying this standard license to your own work will ensure your right to make your work freely and openly available. For queries about the license, please contact ann.geophys@ingv.it.