Local earthquake tomography of the Larderello-Travale geothermal field
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Date
2020-01
Publication Type
Journal Article
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yes
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Abstract
The Larderello-Travale Geothermal Field in South-West Tuscany (Italy) is the oldest and among the most productive geothermal fields in the world. A new 3D model of seismic P-wave velocity (VP) of the upper crust beneath the geothermal field is derived by inverting a set of highly consistent travel-times from local-earthquakes. Results document a marked correlation of VP with previously described, high-reflectivity horizons. We also determined a low velocity body (VP ∼5 km s−1) culminating at depths of about 7 km, with estimated volume of 35–40 km3. Such low velocities are consistent with a granite at temperatures above 700 °C, thus in a partially-molten status.
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published
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Journal / series
Volume
83
Pages / Article No.
101731
Publisher
Elsevier
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Organisational unit
03476 - Giardini, Domenico / Giardini, Domenico
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Funding
154434 - SWISS-AlpArray - Assessing Alpine Orogeny in 4D-space-time Frame (SNF)