Measurement of the thickness of sedimentary bodies in the Johnsbachtal using geophysical methods

This master's thesis deals with the sedimentary power in the anterior Johnsbachtal. The aim is to find out by means of geophysical methods, how high the sedimentary body lies on the original valley floor. In doing so, one shall: Indicate in meters how thick this layer is. For application Geoelectrics and Georadar. There were also Test measurements were carried out with the hammer seismic, but these showed that that the depth of penetration for the question at hand is far from is sufficient. Blast seismics and other stronger seismic impulse sources were not available for financial and legal reasons (nature reserve). The Measurements were carried out at three locations: A measuring profile was approx. 200 Metres under the Neuweggraben at road kilometer 0.8 laid, another approx. 200 m above the Langgriesgraben at road kilometer 2.8 and a third on Height of the Fehringer Kreuzgraben at road kilometer 4.0. The measurements of the geoelectrics showed that the sediment force in the anterior Johnsbachtal with 40 50 meters is to be estimated. The basis for this statement is the Measurement at the height of the Langgriesgraben to a depth of about 70 meters, which The rocks were found at a depth of about 45 meters. The other two measurements, below the Neuweggraben and at the level of the Fehringer Kreuzgraben reached to a depth of about 35 meters each. These showed up to the full penetration depth not the entire cross-section of the sedimentary body, when measured below the New Way Trench was an approach to the lowest point of the Recognize sediment. This leaves the maximum sediment power in this The area is also thought to be 40-50 meters. The measurements with the georadar at the bottom of the valley were achieved with 50MHz antennas a maximum penetration depth of 40 metres. They did not show any rocks up to the full penetration depth, which confirms the statement of the geoelectrics.