Origin of earthquake swarms in the western Bohemian Massif: Is the mantle CO 2 degassing, followed by the Cheb Basin subsidence, an essential driving force?

0455272 - GFÚ 2017 RIV NL eng J - Journal Article
Babuška, Vladislav - Růžek, Bohuslav - Dolejš, D.
Origin of earthquake swarms in the western Bohemian Massif: Is the mantle CO 2 degassing, followed by the Cheb Basin subsidence, an essential driving force?
Tectonophysics. 668-669, February (2016), s. 42-51. ISSN 0040-1951. E-ISSN 1879-3266
R&D Projects: GA ČR GA205/07/1088; GA ČR GAP210/12/2381; GA ČR GAP210/12/2336
Institutional support: RVO:67985530
Keywords : West Bohemia * decarbonation reaction * swarm earthquakes
Subject RIV: DC - Siesmology, Volcanology, Earth Structure
Impact factor: 2.693, year: 2016

We propose a new model of the origin of earthquake swarms in West Bohemia/Vogtland (central Europe) by extensive CO2 degassing of carbonates in the metasomatized junction of three mantle domains. The associated volume change of the decarbonation reaction accounts for the continuing subsidence of the Cheb Basin adjacent to themajor focal zone. The local stress perturbation created by the subsidence, in combinationwith the regional stress field, may account for the recurring swarmseismicity. The largest earthquake energy has been continuously released along a steep contact between orthogneisses of the uplifting Krušné Hory/Erzgebirge domain and granites of the subsiding Smrčiny/Fichtelgebirge domain, forming boundary between two lithospheric segments.
Permanent Link: http://hdl.handle.net/11104/0255899