Abstract
Abstract. The project at hand is a field test around the KTB (Kontinentale Tiefbohrung) site in the Oberpfalz, Southeastern Germany, at the northwestern edge of the Bohemian Massif. The region has been extensively studied through the analysis of several seismic reflection lines deployed around the drilling site. The deep borehole had been placed into gneiss rocks of the Zone Erbendorf-Vohenstrauss. Drilling activity lasted from 1987 to 1994, and it descended down to a depth of 9101 m. In our experiment, we aim to recover structural information as well as anisotropy of the upper crust using the receiver function technique. This retrieved information is the basis for comparing the out-coming anisotropy amount and orientation with information of rock samples from up to 9 km depth, and with high-frequency seismic experiments around the drill site. For that purpose, we installed 9 seismic stations, and recorded seismicity continuously for two years from June 2012 to July 2014.
Highlights
IntroductionWe installed 9 seismic stations, and recorded seismicity continuously for two years from June 2012 to July 2014
For that purpose, we installed 9 seismic stations, and recorded seismicity continuously for two years from June 2012 to July 2014
Before selecting the locations for the seismic station installations, we explored the literature to unravel the presence of seismic networks that ran or are still running in the area
Summary
We installed 9 seismic stations, and recorded seismicity continuously for two years from June 2012 to July 2014. Further geophysical experiments have been performed, especially a 3D seismic experiment around KTB, the ISO89 experiment (Fig. 1) (DEKORP Research Group, 1988; DEKORP and Orogenic processes Working Groups, 1999), as well as a Moving-Source Profiling (MSP) experiment that constrained the effective anisotropy of the upper eight kilometers (Okaya et al, 2004). This anisotropy is apparently not controlled by the faults, but instead by foliation and/or the stress-induced cracks. If we can observe this transition especially detecting anisotropy by receiver functions, there are many very promising applications of this technique
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