Schönau am Königssee, Germany
Schönau am Königssee, Germany

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Tichomirowa M.,TU Bergakademie Freiberg | Berger H.-J.,Sachsisches Landesamt fur Umwelt | Leonhardt D.,Sachsisches Landesamt fur Umwelt
Contributions to Mineralogy and Petrology | Year: 2012

Protoliths of highly metamorphosed gneisses from the Erzgebirge are deduced from the morphology, age and chemistry of zircons as well as from whole rock geochemistry and are compared with lower-grade rocks of Lusatia. Gneisses with similar structural appearance and/or geochemical pattern may have quite different protoliths. The oldest rocks in the Erzgebirge are paragneisses representing meta-greywackes and meta-conglomerates. The youngest group of zircon of meta-greywackes that did not undergo Pb loss represents the youngest igneous component for source rocks (about 575 Ma). Similar ages and zircon morphology reflect the subordinate formation of new zircon grains or only zircon rims in the augengneiss from Bärenstein and Wolkenstein, which probably represent metamorphic equivalents to Lower Cambrian two-mica granodiorites from Lusatia. Bulk rock chemistry, intense fracturing and high U and Th concentrations of zircons suggest deformation-induced and fluid-enhanced recrystallisation of zircon grains. Temperatures during tectonic overprinting-too low to reset zircon ages-indicate mid- or upper crustal levels for shearing recorded in these augengneisses. Lower Cambrian (~540 Ma) granodiorites are widespread in Lusatia but are exclusively represented by the Freiberg gneiss dome in the Eastern Erzgebirge. Ordovician protolith ages were recorded by zircons from the augengneisses of the Reitzenhain-Catherine dome and the Schwarzenberg dome (Western Erzgebirge) documenting significant regional differences between the eastern and the western Erzgebirge (~540 vs. ~490 Ma). In the Western Erzgebirge, most meta-volcanic rocks (muscovite gneisses) and meta-granites (mainly red augengneisses) yield Ordovician zircon ages, whereas in the Eastern part, similar rocks mainly recorded Lower Cambrian protolith ages. Zircon overprinting was highest within discrete tectonic zones where the combination of fluid infiltration and deformation induced variable degrees of recrystallisation and formation of a new augengneiss structure. Variable degrees of Pb loss caused age shifts that do not correspond to changes in zircon morphology but may be associated with U and Th enrichments. Major changes in bulk rock composition appear to be restricted to discrete zones and to (U)HP nappes, whereas gneisses with a MP-MT metamorphic overprint basically show no geochemical modifications. © 2012 Springer-Verlag.


Abdelfadil K.,German Research Center for Geosciences | Romer R.L.,German Research Center for Geosciences | Seifert T.,TU Bergakademie Freiberg | Lobst R.,Sachsisches Landesamt fur Umwelt
Chemical Geology | Year: 2013

Pre-Variscan mantle derived gabbros (c. 400Ma) and late-Variscan calc-alkaline lamprophyres (c. 330Ma) were emplaced within the Cadomian basement of Lusatia. They were sampled to characterize the effect of the Variscan orogeny onto the mantle beneath Lusatia. The tholeiitic gabbros originated from a mantle source that had been metasomatized during subduction beneath the Cadomian magmatic arc at c. 570Ma, which led to enrichment of LREE, Ba/Nb, and LILE relative to primitive mantle. The late-Variscan calc-alkaline lamprophyres (spessartites) have high MgO, Cr, and Ni contents reflecting the mantle source. The spessartites, however, have distinctly higher Rb, Ba, Pb, Sr, Th, and Cs contents, higher La/Yb, 87Sr/86Sr, and 206Pb/204Pb ratios, and lower 143Nd/144Nd ratios than the gabbros, which indicates a second, Variscan event of mantle enrichment. In addition, the spessartites have trace element ratios (i.e., Ba/Nb, Nb/U, Th/U, and Th/Nb) that resemble continental crust and Sr, Nd, and Pb isotopic compositions that demonstrate involvement of crustal material by source enrichment during the Variscan orogeny. The calc-alkaline lamprophyres of the Lusatia occupy the same age range as calc-alkaline lamprophyres from the adjacent Erzgebirge and Sudetes. The trace-element signatures and Sr and Nd isotopic compositions of Lusatian spessartites, however, are less enriched than those of comparable dikes in the Sudetes and the Erzgebirge. This implies that the Variscan orogeny resulted in geochemically and isotopically heterogeneous lithospheric mantle on the regional scale, possibly reflecting the contrasting nature of the subducted rocks. © 2012 Elsevier B.V.


This paper gives a brief review of the employment of the flood forecast centre of the Free State of Saxony during the flood in June 2013. It doesn't only emblaze the classic flood forecasting which has already reached a very high quality. The explanation of important accompanying activities is also mentioned as well as some leadoff conclusions.


The following article explains on the example of transport planning that the successful implementation of Flood Risk Management Directive are needed many actors also outside the water management. After a brief introduction in to the topic a few main actors in the flood risk management are named with their tasks. On specific examples of transport infrastructures nearby waterbodies, the last part shows the possibilities of the integrated flood risk management implementation of the Flood Risk Management Directive.


Albert E.,Sachsisches Landesamt fur Umwelt | Grunert M.,Sachsisches Landesamt fur Umwelt
Archives of Agronomy and Soil Science | Year: 2013

Since 1966, the effects of increasing mineral N fertilization in combination with different organic fertilizers (without, farmyard manure, straw) were examined at two sites in Saxonia (Methau: loam, Spröda: loamy sand) in two-factorial static experiments with regard to yield, humus content, N-balance, Nmin content and DL-soluble contents of phosphor and potassium. During the period 1966-2010, rising N application caused a significant yield increase. Farmyard manure treatments always showed the highest yields. Particularly, the yields of potatoes and sugar beets were considerably increased by applying manure, while this had substantially smaller effects on winter wheat and summer barley. The humus contents decreased clearly on both sites. They were almost halved with omitted organic fertilization. With manure supply, the starting contents could not be kept upright, but they were, in relation to omitted organic fertilization, on a clearly higher level. The effect on humus content, resulting from the straw fertilization, was comparatively weak. Under these experimental conditions, high yields with slightly negative to slightly positive N-balance results, were realised. Before winter, the Nmin content increased with rising N supply and showed a significant dependence to the N-balances. In case of manure fertilization, they always were on a higher level. The long-term differentiated fertilization strongly affected the DL-soluble contents of phosphor and potassium of the soil. © 2013 Copyright Taylor and Francis Group, LLC.


This article gives a brief review of the present implementation process of flood risk management directive pariticular in Saxony. Eligible activities from the period before the floood risk mangement policy was valid are explained. Subsequently the paper presents challenges for the implementation of flood risk management directive for the next years.


In a meta study of the dominating forms of land use in Germany (farmland, pasture, forest), the balance criteria for each (total influx, removal, balance), the Nmin-contents in late autumn, the nitrate concentrations in seepage water and the eluviation for the nutrient nitrogen were registered. In this work, some summaries of the results of the study will be presented.


Kolbe H.,Sachsisches Landesamt fur Umwelt
Journal of Plant Nutrition and Soil Science | Year: 2010

Organic-matter (OM) balancing can provide useful information for sustainable arable farm management. However, the balance methods commonly used are rather inaccurate and fail to meet current requirements. Therefore, an improved, site-adjusted, semiquantitative technique based on the VDLUFA method developed by Körschens et al. (2004) in Germany was worked out for terrestrial soils for manual (i.e., not computer-based) use in agricultural practice and consulting. It was optimized using results from 39 long-term field trials to take into account site-specific effects in Central Europe. The climatic, geogenic, and soil-chemical influences on the process of OM decay were taken into consideration by adapting organic-carbon (OC) coefficients of the organic material and the cultivation effects of crop species divided into six site-specific groups. The balances calculated were adjusted to the soil organic-carbon (SOC) concentrations, and the evaluation system was developed for use in conventional and organic agriculture on sites in Central Europe. The statistical deviation between calculated and field data is ± 3.7 g kg-1 for the VDLUFA method and ± (2.1-2.3) g kg-1 SOC for the site-adjusted method, and the variance is reduced by 62%-68%. For use in farming, little information about soil and climatic characteristics, crop species, or organic material supply is needed, and the results can be used for in-depth farm analyses and regulative reasons. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


This paper shows instruments or initiatives to implement the EC Flood Risk Management Directive. The selected examples represent additional measures to reduce flood risks and to increase awareness of risk. The examples also illustrate the importance of integrating and reaching actors outside the water management with professional communication to achieve the EC Flood Risk Management Directive.


New PM 2.5 ambient air quality concentration limits and target values are recently defined in the 39th Ordinance on the implementation of the Federal Immission Control Act (39. BlmSchV). This paper examines legal ramification for the German State of Saxony and develops trends and forecast of the area-wide PM2.5 concentration. The ambient concentration forecast and trends were calculated using spatial interpolation dispersion model IMMIKART For the model input, the PM2.5 emissions inventory data and emission forecasts were developed and coupled with the State of Saxony PM 2.5 monitoring values. This study also includes recommendations for appropriate emissions reduction measures.

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