Spatial and temporal variations of the fluid signatures with regard to ongoing magmatic and different earthquake swarm activity beneath the Cheb basin/CZ

地幔流体在岩石圈中的迁移及其与震群地震活动的相互关系和地壳中与断层有关的岩浆/流体运移是研究的重点。这一建议是基于天然气和同位素时间序列数据，这些数据在截至2010年12月的CHAB盆地及其北部外围的八个不同的排气位置记录，原因是持续的岩浆活动和1994至2008年间发生的三个不同的强震群时期。我们的详细目标是(1)评估2008年与MariánskéLáznĕ和PočAtky-Plesnán断裂带有关的震群后流体异常的时空产状，(2)比较2000年和2008年强震群与不同震群性质之间的地震触发流体异常，(3)探索震源区附近地区地幔氦组分的时空递增，(4)通过详细分析1994年以来Bublák气通量最高的地点的氦、碳同位素时间序列，获得来自更深层岩浆上升的同位素指示。所有数据的最终解释将有助于解释地球物理研究中观察到的时间和空间异常，并将为在西埃格尔裂谷地区寻找最佳的ICDP钻探位置提供必要的信息。

Mantle-derived fluid migration through the lithosphere, its interrelation to swarm earthquake seis-micity and fault-related magma/fluid transport in the crust are in focus of the studies. The proposal is based on gas and isotope time series data which have been recorded at eight different de-gassing locations of the Cheb basin and its northern periphery up to December 2010 due to ongo-ing magmatic activity and three different strong swarm earthquake periods occurred between 1994 and 2008. We are aiming in detail (1) to evaluate the temporal and spatial occurrence of fluid anomalies after the earthquake swarm 2008 related to Mariánské Láznĕ and the Počatky-Plesná fault zone, (2) to compare seismically triggered fluid anomalies of the strong swarms 2000 and 2008 in relation to the different swarm properties, (3) to explore the progressive spatial and temporal increase of mantle-derived helium fractions at locations close to the focal zone, (4) to obtain isotopic indications for ascending magma from a deeper reservoir by detailed analysis of helium, carbon isotope time series since 1994 at Bublák - the location with the highest gas flux. The final interpretation of all data will provide assistance in the interpretation of temporal and spa-tial anomalies observed in geophysical studies and will supply essential information to find an optimal ICDP drilling location in the western Eger rift area.