Local earthquake tomography of the Larderello-Travale geothermal field

被引：12
|
作者：
Bagagli, M. [1 ]
Kissling, E. [1 ]
Piccinini, D. [2 ]
Saccorotti, G. [2 ]
机构：
[1] Swiss Fed Inst Technol, Inst Geophys, Zurich, Switzerland
[2] Ist Natl Geofis & Vulcanol, Sez Pisa, Pisa, Italy
来源：
GEOTHERMICS | 2020年 / 83卷 / 83期
关键词：
Local earthquake tomography; Geothermal field seismotectonics; New P-wave velocity model; SOUTHERN TUSCANY; SEISMIC TOMOGRAPHY; AREA; EVOLUTION; MODELS; SYSTEM; VP;
D O I：
10.1016/j.geothermics.2019.101731
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
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 (V-p) 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 V-p with previously described, high-reflectivity horizons. We also determined a low velocity body (V-p similar to 5 km s(-1)) culminating at depths of about 7 km, with estimated volume of 35-40 km(3). Such low velocities are consistent with a granite at temperatures above 700 degrees C, thus in a partially-molten status.
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页数：10
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