Seismic and Seismological Features of the Vogtland-Bohemia Earthquake Swarms - in preparation for a high resolution seismic survey and scientific drilling

重复的震群活动和幔源富CO2流体的喷出是埃格裂谷区西部大陆岩石圈地幔目前正在进行的岩浆作用的重要表现。地球动力学性质和这些过程的影响远未被理解。岩浆活动的起源（上地幔还是下地壳？）流体的地球动力学作用也没有受到很好的限制。我们希望通过对邻近地区的两个深反射地震剖面（德国DEKORP MVE-90和捷克9 HR剖面）进行现代再处理来解决这些问题。我们将建立深层微地震和反射构造之间的相关性。地震成像方法对这两种剖面都是通用的。将使用常用的速度模型获得微地震数据和反射结构。这将改善可能的相关性，并能够将埃格裂谷特征与邻近KTB场地的反射和微地震特征进行比较，在那里已经采用了类似的方法。预期的结果（以及本提案中包括的一项小型大地电磁可行性研究）将有助于设计一个新的高分辨率地震反射剖面，该剖面穿过切布盆地的一个持续岩群区。这样的剖面图又将成为科学钻探的现场前研究。

Repeated earthquake swarms and exhalation of mantle-derived CO2-enriched fluids are important expressions of presently ongoing magmatic processes in the intra-continental lithospheric mantle of the Western Eger rift region. The geodynamic nature and the implications of these processes are far from being understood. Neither the origin of magmatic activity (upper mantle or lower crust?) nor the geodynamic role of fluids are well constrained. We would like to address these issues by modern reprocessing of two deep reflection seismic profiles from neighbouring areas (German DEKORP MVE-90 and Czech 9HR profiles). We will establish correlations between deep microseismic and reflecting structures. The seismic imaging approaches will be universal for both profiles. The microseismic data and reflection structures will be obtained using common velocity models. This will improve possible correlations and enable a comparison of the Eger Rift features to reflection and microseismic features of the neighbouring KTB site, where a similar methodology has been already applied. The expected results (and a small magnetotelluric feasibility study included in this proposal) will help to design a new high resolution seismic reflection profile crossing a persistent swarm area of the Cheb Basin. Such a profile, in turn, will be a pre-site study for scientific drilling.