https://opendata.uni-kiel.de/receive/fdr_mods_00000084 https://opendata.uni-kiel.de/servlets/MCRFileNodeServlet/fdr_derivate_00000087/Duvensee_2019.zip https://opendata.uni-kiel.de/rsc/thumbnail/fdr_mods_00000084.png 2024-09-19 data set Geophysical Data (GPR, ERT, Seismic) Duvensee 2019 We present an integrated approach of multi-method geophysical sounding and local soil sampling for differentiate, and map organic sediments. Our study is based on ground-penetrating radar (GPR), electrical resistivity tomography (ERT) and shear-wave seismic (SH seismic) profiling applied to sediments of the former Lake Duvensee (northern Germany), nowadays a bog. The bog is embedded in low conductive glacial sand and is characterized by layers of different gyttja sediments (detritus and calcareous). The present study was conducted in order to identify the bog morphology and the thickness of the peat body and lake sediments, in order to understand the basin evolution. To validate the geophysical results, derived from surface measurements, drilling, soil analyses as well as borehole guided wave analysis of electromagnetic waves and Direct-Push (DP-EC) have been carried out and used for comparison. It turned out that each method can distinguish between sediments that differ in grain size, particularly between peat, lake sediments (gyttjas and mud) and basal glacial sand deposits. GPR is even able to separate between strongly and weakly decomposed peat layers, which is also clear considering resistivity variations in the ERT computation. From the association between geophysical properties and sediment analysis (e.g., water content and organic matter) different gyttjas were distinguished (coarse and fine) and seismic velocity was correlated to bulk density. Moreover, GPR and SH-wave seismics present different resolutions, confirming that the latter allows measurements, which are more focused on determining the extension of basal sand deposits, the depth of which is diffcult to reach with GPR. Representative values of electrical resistivity, dielectric permittivity, and shear wave velocity have been determined for each sediment type and are therefore available to complete the investigation of wetland environments. Fine grained lake sediments were diffcult to differentiate by the applied methods. en database 550 his Host institution aut Author Corradini, Erica 0000-0003-4266-8589 Corradini Erica Wilken, Dennis aut Author 0000-0002-5128-351X Wilken Dennis Panning, Diana aut Author 0000-0002-3167-0360 Panning Diana Pickartz, Natalie aut Author 0000-0002-3290-7032 Pickartz Natalie 10.57892/100-84 Thorwart, Martin aut Author 0000-0002-0060-4141 Thorwart Martin Wunderlich, Tina aut Author 0000-0003-2275-704X Wunderlich Tina Erkul, Ercan aut Author 0000-0003-3396-807X Erkul Ercan Rabbel, Wolfgang aut Author 0000-0003-4720-6906 Rabbel Wolfgang Dreibrodt, Stefan ctb Contributor 0000-0003-4812-0258 Dreibrodt Stefan Zanon, Marco ctb Contributor Zanon Marco Gross, Daniel ctb Contributor Gross Daniel Lübke, Harald ctb Contributor Lübke Harald Vött, Andreas ctb Contributor 0000-0001-7001-6225 Vött Andreas Willershäuser, Timo ctb Contributor Willershäuser Timo 2016 2019 2020 290391021 Archäologische Prospektion Probenahme Ground Penetrating Radar Electrical Resistivity Tomography Seismic Duvensee 53.696627, 10.545149 A GSSI GPR Antenna with 200 MHz frequency was used to perform common offset data acquisition in the Duvensee area. The presented profile (50 m long) is part of a survey made in November 2016. Geoelectric measurements were conducted using a PC-controlled DC resistivity meter system RESECS (Geoserve) with 96 electrodes. The electrode spacing was 0.5 m (total length of the profile 47.5 m) and we measured Dipole-Dipole and Wenner-Alpha arrays. Electrode locations were determined by a Differential GPS (Leica Geosystems AG, Heerbrugg, Switzerland). Direct-Push (DP-EC) logging was conducted using a Geoprobe SC520 soil conductivity probe, which is composed of four electrodes in linear arrangements and was operated in a Wenner array enabling a vertical resolution of 0.02m (www.geoprobe.com). The electric current and voltage are constantly measured with depth and used for the calculation of electric conductivity in mS/m. This equipment was used to measure at the location of core I.4 and the values have been compared also with the measurements carried out in the laboratory. In the laboratory, the electric resistivity of drill core segments was measured using an earth resistivity meter connected with four electrodes in Wenner-Alpha configuration (5 mm long and 5 mm distant with a diameter of 1 mm). The quadrupole was inserted into the sediment, ensuring the contact between the electrodes and the ground. The surface contact area of the electrodes is about 1mm2. Corings were conducted using an Usinger piston corer, proceeding with 1mdepth increments along a 50 m long transect, which has been taken as a reference profile. The stratigraphy was described in the laboratory. We conducted a seismic profile, which was oriented in the dip direction of the local underground. We excited S-waves by horizontal hammer blows against a steel bar, which was coupled to the ground by steel spikes. The blow direction was perpendicular to the profile, i.e., in the strike direction of the local underground. Therefore, the excited S-waves were SH-waves. The data were recorded with three Geometrix Geode seismographs, equipped with horizontal geophones. Data formats: .pdf; .docs; .txt; .png; .dat; .shp; .sgy; .csv; .cfg; .ohm; .xls; jpg; .tif fdr_mods_00000084 https://opendata.uni-kiel.de/receive/fdr_mods_00000084