Please choose your delivery country and your customer group
Permian and mesozoic sedimentary rocks of the variscan orogene-area are often U-, Cu-, Pb-, and Zn-bearing, especially layers of reduced thickness and reducing environment, as well as the border between crystalline basement and overlying rocks. The outcrops of these rocks are well investigated - on the other hand there is a large, nearly unexplored area, where the prospective series are covered by younger formations. The (few) drillings in this region corroborated the prospectivity. Therefore, the drillings Ortenburg 1 and 2 have been brought down, reaching the crystalline basement topped by 1 m clastic layer, under tertiary, cretaceous, and mesozoic rocks. Chemical analyses show amounts up to 0.15% Pb and 0.1% Cu in the weathered basement and the clastic layer. At the basement top there are peaks in the gamma-log with intensities of 2-3 x crystalline background. These features do not indicate an economic deposit but give reason for continuing prospecting. (ERA citation 07:051897)