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Terrana Geophysik Zeppelinstr. 15, 72116 Moessingen, Germany Tel. +49-7473-91388, Fax 91389 email: [email protected] www.terrana-geophysik.de Exploration geophysics Terrana Geophysik is an enterprise, which is specialized in natural resource exploration (up to about100m depth) with means of geophysics. The exploration is carried out from the surface without the need of drilling. Up to now, we have worked on over 100 projects with success. Different sediments and rocks have differrent physical properties like the electrical conductivity or travelling velocities of seismic waves. By measuring these parameters from the surface, a distinction of different layers and different geological material is possible. sandy/silty areas Extension zone of a gravel pit. Non-favourable areas (sandy and silty material)show lower resistivity values (red to blue colors). 60 80 100 120 140 160 180 200 220 240 GRAVEL LAYER RESISTIVITY 0 COMBINATION: geoelectrical depth sounding and boring sounding point drilling 1 0 3,6 sounding point 2 100 50 0,80 2,40 4,00 4,60 Mutterboden Sand, lehmig Ton, grau, mittelfett, Sand Kohleschluff, Braunkohlest. 250m 3,6 23,20 24,00 28,80 34,00 35,20 36,40 m 80 loess 60 sandstone (Keuper) 50 9,6 Kies, teilw. sandig, schluffig proposed drillings 1,2 8,4 26,0 200m Ton rot/grau, fett Ton rot/grau, mittelfett, Sand Ton, grau, Sand limestone (Muschelkalk) 40 0 13,6 Ton, grau, fett Ton, grau, mittelfett, Sand 60 80 m 100 sounding point 3 150 20 40 sand clay gravel sandy clay 200 400 600 m Thickness and volume of the reservoir and its overburden can be determined at low costs, even covering a large area. Furthermore, material quality statements, like weathering state or sand and lime content, can be made for special sediments or rocks like e.g. clay, gravel and gypsum deposits. Field examples at www.terrana-geophysik.de