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  • In the former GDR, investigations were carried out between 1980 and 1990 to estimate the raw material potential in the pre-Upper Permian bedrock units (Flechtingen-Rosslau Hills, Harz Mountains, Saxon Granulite Mountains, Thuringian Forest, Thuringian-Vogtlandian Slate Mountains, Ore Mountains, Elbe Valley Region/Lusatia), which lie at the earth's surface or are slightly covered by the Cenozoic. Part of these investigations was a geochemical prospection in the area of the above mentioned bedrock units. Approximately 18,000 water and 17,500 stream sediment samples were taken and geochemically analysed over an area of almost 15,000 km². The results of these investigations were documented in sub-reports on the individual bedrock units as well as in the "Final Report on the Comparative Evaluation of the Raw Material Potential in the Bedrock Units of the GDR" (Röllig et al., 1990; in German). These data from the bedrock units in the southern part of the former GDR are unique in their high sampling density (> 1 sample/km²) and provide a comprehensive geochemical survey of these areas. All later geochemical investigations (Geochemical Atlas 2000 as well as within the framework of GEMAS and FOREGS) were carried out with a much lower sampling density. These valuable and irretrievable data are now made generally available via the BGR geoportal. In addition to the digital provision of the original data material, area-wide distribution maps are made available for the first time, which were generated using modern computer-assisted methods. The downloads show the distribution of Zirconium contents in stream sediments in four different coloured point and colour shaded contour maps.

  • The Lithofacial Map of the Quaternary 1 : 50,000 (LKQ 50) is a map series of the GDR covering nearly the whole former state territory besides the South of Saxony and Thuringia. The series consists of 123 map sheets, each of which encompassing several horizon maps mostly complemented by about five cross sections. Specifications concerning map content and structure provides Cepek (1999). The data of the LKQ 50 map sheet 1968 Berlin/Nordost provided here were digitised in frame of the Geo3D-Oder project of the German Federal Institute for Geosciences and Natural Resources (BGR). The data include elements of the seven horizon maps 1968-2, 1968-3, 1968-4, 1968-5, 1968-6, 1968-7, and 1968-8. Sheet 1968 Berlin/Nordost was published at an early stage of the map series preparation in 1972. Therefore, the topics of these maps are defined in a primary version 1 of the general legend. In contrast to map sheets of a later publication date the single horizon maps of 1968 Berlin/Nordost lack map legends to provide a specific stratigraphic and genetic classification of the depicted strata. However, as each horizon map comprises just two to four layers, this assignment can be derived from the signatures and the stratigrafic indication of the respective horizon map. For each horizon map the digitised elements comprise several polygon shapefiles of the single layers, a polyline shapefile of isohypses related to layer bases, a point shapefile of lithological profiles and a polygon shapefile of additional information concerning areas of heavy strata deformation and insufficient investigation. Non-numeric contents of the attribute tables are encoded by numbers and are translated in full text by means of key tables. The key table Normalprofil allows the stratigraphic and genetic classification of horizons displayed in horizon maps by code numbers of the column N_ID. Detailed descriptions concerning the data structure are provided in the attachments. Reference: Cepek, A. G. (1999): Die Lithofazieskarte Quartär 1 : 50.000 (LKQ 50) – Eine Erläuterung des Kartenkonzepts mit Hinweisen zum Gebrauch. - Brandenburgisch. Geowiss. Beitr. 6, 2: 3-38, 3 Abb., 2 Tab.; Kleinmachnow

  • GEMAS (Geochemical Mapping of Agricultural and Grazing Land Soil in Europe) is a cooperative project between the Geochemistry Expert Group of EuroGeoSurveys and Eurometeaux. In total, more than 60 international organisations and institutions worldwide were involved in the implementation of the project. During 2008 and 2009, a total of 2219 samples of agricultural (arable land soils, 0 – 20 cm, Ap samples) and 2127 samples of grazing land (pasture land soils, 0 – 10 cm, Gr samples) soil were collected at a density of 1 site/2 500 km² each from 33 European countries, covering an area of 5,600,000 km². All samples were analysed for 52 chemical elements after an aqua regia extraction, 41 by XRF (total), TC and TOC. In addition, the agricultural soil samples were analysed for 57 elements in a mobile metal ion (MMI®) extraction and Pb isotopes. All analytical results were subject to tight external quality control procedures. The GEMAS project thus provides for the first time fully harmonised data for element concentrations and bioavailability of the elements at the continental (European) scale. The downloadable files present the areal distribution of the element contents determined by different analytical methods in the shape of colour shaded contour maps with a classification in 7 and 72 levels each.