Publication Date:
2017-04-04
Description:
In the crust, the orientation of a dike is controlled by the orientation of the principal stresses, with the dike orthogonal to the least compressive stress. At shallower levels, the presence of a volcanic edifice introduces significant deviations from expected patterns. The load of the edifice focuses the stresses above the
center of a magma chamber, promoting the development of a central vent system.
But the location and orientation of the dikes may be also controlled by the shape of the edifice, or by the presence of scarps along the volcano slopes, commonly produced by sector collapses. Therefore, while dike propagation in areas without prominent relief is usually controlled by regional
tectonism, the propagation of dikes in volcanic edifices depends upon the shape and topography of the edifice, as well as the stress conditions within shallow magma reservoirs.
Description:
Published
Description:
53-56
Description:
1.5. TTC - Sorveglianza dell'attività eruttiva dei vulcani
Description:
3.2. Tettonica attiva
Description:
3.5. Geologia e storia dei vulcani ed evoluzione dei magmi
Description:
3.6. Fisica del vulcanismo
Description:
4.3. TTC - Scenari di pericolosità vulcanica
Description:
N/A or not JCR
Description:
reserved
Keywords:
dike
;
hazard
;
04. Solid Earth::04.01. Earth Interior::04.01.99. General or miscellaneous
;
04. Solid Earth::04.04. Geology::04.04.99. General or miscellaneous
;
04. Solid Earth::04.04. Geology::04.04.09. Structural geology
;
04. Solid Earth::04.07. Tectonophysics::04.07.99. General or miscellaneous
;
04. Solid Earth::04.07. Tectonophysics::04.07.05. Stress
;
04. Solid Earth::04.07. Tectonophysics::04.07.07. Tectonics
;
04. Solid Earth::04.08. Volcanology::04.08.99. General or miscellaneous
;
04. Solid Earth::04.08. Volcanology::04.08.03. Magmas
;
04. Solid Earth::04.08. Volcanology::04.08.08. Volcanic risk
;
05. General::05.08. Risk::05.08.99. General or miscellaneous
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
