Slug flow - A possible explanation for hydrogeochemical earthquake precursors at Bad Brambach, Germany

被引：61

作者：

Heinicke, J ^{[1
]}

Koch, U ^{[1
]}

机构：

[1] TU Bergakad Freiberg, Res Grp Freiberg, Sachs Akad Wissensch Leipzig, D-09596 Freiburg, Germany

来源：

PURE AND APPLIED GEOPHYSICS | 2000年 / 157卷 / 10期

关键词：

seismicity; seismotectonic faults; earthquake prediction; earthquake precursor; hydrological earthquake precursor; radon anomaly; spring water; slug flow; pressure pulse;

D O I：

10.1007/PL00001053

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Extensive hydrogeological, geochemical, radiometric and hydro-isotope investigations in the Vogtland region, Germany, since 1989 suggest a fluid connection between a special epicentral area (focal depth: 3-15 km; M-L < 5) and a mineral spring at Bad Brambach. Twenty-six hydrogeochemical anomalies are related to earthquakes/swarmquakes of that epicentral area near Novy Kostel (CZ) during the last 9 years. The anomalies were originated by a slug-flow process in the fluid-filled fracture system near the surface. The gas component of the observed fluid (99 vol. % CO2) is of upper mantle/crustal origin. The fluid transport pathway to the surface is the seismically active Marianske Lazne fault zone. The interpretation suggests an influence of the fluid system due to earthquake preparation processes.

引用

页码：1621 / 1641

页数：21

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