Record details

Title
    Hydrothermal alteration as a trigger mechanism for earthquake swarms: the Vogtland/NW Bohemia region as a case study
Author
    Fischer, Tomáš
    Gaupp, R.
    Götze, J.
    Heinicke, J.
    Koch, U.
    Konietzky, H.
    Stanek, K.-P.
Language
    anglicky
Publication type
    článek v odborném periodiku
Source title - serial
    Geophysical Journal International
Vol./nr.
    Roč. 178, č. 1
Pages
    s. 1-13
Year
    2009
Notes
    Rozsah: 13 s.
    Výzkumný záměr: CEZ:AV0Z30120515
Subject category
    earthquake source observations
    fracture and flow
    fractures and faults
    gas and hydrate systems
    hydrothermal systems
Keyword
    Alteration
    Bohemia
    Case
    Earthquake
    Hydrothermal
    Mechanism
    Region
    Study
    Swarms
    Trigger
    Vogtland/NW
Abstract (in english)
   Earthquake swarms occur mostly in regions with CO2-enriched pore fluids. It is generally accepted that both geodynamic stress accumulation and critical pore fluid pressures act as a triggering mechanism for most seismic events. The new thesis presented here is that hydrothermal alteration processes in fault zones help facilitate the shear failure propagation due to mechanical weakening and dissolution of the wall rock, in addition to the normal shear stress and fluid overpressure. The basic idea that stress corrosion cracking results from chemical weakening and comminution has been discussed for many years.
Contributor
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
    U
Import date
    9. 12. 2013