Research study for a geoelectrical pre-site survey of the drilling location within the Eger Rift - Investigation of the subsurface electrical conductivity distribution

Eger裂谷西段以地震群的发生、岩石圈地幔信号的CO2气体释放、第三纪/第四纪火山作用和新构造断裂等地球动力学和地质现象而闻名。该研究项目旨在评价和探测目标深度为4-5公里的切布盆地/埃格尔裂谷地下的特征构造背景和电阻率分布几何形状。我们将进行大规模的直流地电实验，该实验将覆盖诺威·科斯特尔沼泽地震震中区和HartoušOv和Bublák莫菲特地区周围岩浆二氧化碳强制脱气的区域。实验将包括直流地电和自然电位(SP)测量。其目标是评估和勾勒出异常电阻率的区域/地带，以及描绘与地震学和流体有关的突出地电构造。电导率结构的变化可能反映了控制地球动力活动区岩浆流体抬升的上地壳构造变化。这一结果将有助于从地电岩石性质的角度选择合适的ICDP钻探地点。

The westem part of the Eger Rift is known for geodynamical and geological phenomena such as the occurrence of earthquake swarms, CO2 gas emanations of lithospheric mantle signature, Tertiary/Quaternary volcanism and neotectonic faulting. The research project aims to the evaluation and detection of the characteristically structural settings and geometry of resistivity distribution of the Cheb Basin/Eger Rift subsurface with a target depth of 4-5 km. We will carry out a large scale DC geolectrical experiment with a field layout, which will cover the Novy Kostel swamn earthquake epicenter area and the zone of forced degassing of magmatic CO2 around the mofette fields of Hartoušov and Bublák. The experiment will include both DC geoelectrics and SP (spontaneous natural potentials) measurements. The goal is to evaluate and to outline regions/zones of anomalous electrical resistivity as well as to delineate prominent geoelectric structures associated with seismological and fluid related features. Variations of the electrical conductivity structure may reflect structural changes in the upper crust which control the uprise of magmatic fluids in the geodynamic active area. The results will assist the selection of adequate ICDP drilling locations in the Eger Rift from the sight of geoelectric rock properties.