Bayerisches Landesamt fur Umwelt


Bayerisches Landesamt fur Umwelt

Time filter
Source Type

Agency: European Commission | Branch: H2020 | Program: ERA-NET-Cofund | Phase: LCE-26-2016 | Award Amount: 31.30M | Year: 2017

The GeoERA proposal is put forward by the national and regional Geological Survey Organisations (GSO) of Europe. Its overall goal is to integrate the GSOs information and knowledge on subsurface energy, water and raw material resources, to support sustainable use of the subsurface in addressing Europes grand challenges. The GeoERA consortium will organise and co-fund together with the EC a joint call for transnational research projects that address the development of 1) interoperable, pan-European data and information services on the distribution of geo-energy, groundwater and raw material resources; 2) common assessment frameworks and methodologies supporting better understanding and management of the water-energy-raw materials nexus and potential impacts and risks of subsurface use; 3) knowledge and services aimed at European, national and regional policy makers, industry and other stakeholders to support a more integrated and efficient management and more responsible and publicly accepted exploitation and use of the subsurface. The transnational projects selected in the call will be implemented by the consortium partners themselves, who provide their co-funding in-kind. GeoERA will contribute to the overall EU objective of building the ERA through enhanced cooperation and coordination of national and regional Geological Survey research programmes. GeoERA will also include forward looking activities, including the creation of opportunities for future collaborative research, and the feasibility assessment of an Article 185 initiative in Applied Geoscience as follow-up to the GeoERA ERA-NET towards the development of the ultimate goal of delivering a Geological Service for Europe.

Vamvaka A.,Aristotle University of Thessaloniki | Siebel W.,University of Tübingen | Chen F.,Hefei University of Technology | Rohrmuller J.,Bayerisches Landesamt fur Umwelt
International Journal of Earth Sciences | Year: 2014

Apatite fission-track (AFT) dating applied to uplifted Variscan basement blocks of the Bavarian Forest is employed to unravel the low-temperature history of this segment of the Bohemian Massif. Twenty samples were dated and confined track lengths of four samples were measured. Most samples define Cretaceous APT ages between 110 and 82 Ma (Albian to Campanian) and three samples give older ~148-140 Ma (Jurassic-Cretaceous boundary) ages. No discernible regional age variations exist between the areas north-east and south-west of the Pfahl shear zone, but >500 m post-Jurassic and post-Cretaceous vertical offsets along this and other faults can be inferred from elevation profile analyses. The AFT ages clearly postdate the Variscan exhumation history of the Bavarian Forest. Thermal modeling reveals that the ages are best explained by a slight reheating of the basement rocks to temperatures within the apatite partial annealing zone during the middle and late Jurassic and/or by late Cretaceous marine transgression causing burial heating, which affected marginal low-lying areas of the Bohemian Massif and the Bavarian Forest. Late Jurassic period was followed by enhanced cooling through the 120-60 °C temperature interval during the subsequent exhumation phase for which denudation rates of ~100 m myr-1 were calculated. On a regional scale, Jurassic-Cretaceous AFT ages are ubiquitous in marginal structural blocks of the Bohemian Massif and seem to reflect the exhumation of these zones more distinctly compared to central parts. © 2013 Springer-Verlag Berlin Heidelberg.

Auerswald K.,TU Munich | Fiener P.,University of Augsburg | Martin W.,Bayerisches Landesamt fur Umwelt | Elhaus D.,Geologischer Dienst Nordrhein Westfalen
Catena | Year: 2014

The K factor of the Universal Soil Loss Equation is the most important measure of soil erodibility that was adopted in many erosion models. The K factor can be estimated from simple soil properties by a nomograph. Later, the classical K factor equation was published to assist the calculation of K. This equation, however, does not fully agree with the nomograph, which still has to be used in these deviating cases. Here we show for a large soil data set from Central Europe (approximately 20,000 soil analyses) that the equation fails in considerably more than 50% of all cases. The failure can be large and may amount to half of the K factor. To facilitate the K factor calculation, we developed a set of equations that fully emulates the nomograph and supersedes the cumbersome reading of the nomograph. © 2014 Elsevier B.V.

Wilmsen M.,Senckenberg Naturhistorische Sammlungen Dresden | Niebuhr B.,Senckenberg Naturhistorische Sammlungen Dresden | Chellouche P.,Friedrich - Alexander - University, Erlangen - Nuremberg | Purner T.,Bayerisches Landesamt fur Umwelt | Kling M.,Ulmer Str. 204
Facies | Year: 2010

The facies development and onlap pattern of the lower Danubian Cretaceous Group (Bavaria, southern Germany) have been evaluated based on detailed logging, subdivision, and correlation of four key sections using an integrated stratigraphic approach as well as litho-, bio-, and microfacies analyses. Contrary to statements in the literature, the transgressive onlap of the Regensburg Formation started in the Regensburg-Kelheim area already in the early Early Cenomanian Mantelliceras mantelli ammonite Zone and not in the Late Cenomanian. In the Early Cenomanian, nearshore glauconitic-bioclastic sandstones prevailed (Saal Member), followed by Middle to lower Upper Cenomanian mid-shelf siliceous carbonates intercalated with fine-sandy to silty marls (Bad Abbach Member). Starting in the mid-Late Cenomanian (Metoicoceras geslinianum ammonite Zone), a considerable deepening pulse during the Cenomanian-Turonian Boundary Event (CTBE) initiated the deposition of the deeper shelf silty marls of the Eibrunn Formation, which range into the early Early Turonian. During the CTBE transgression, also the proximal Bodenwöhrer Senke (ca. 40 km NE of Regensburg) was flooded, indicated by the onlap of the Regensburg Formation onto Variscan granites of the Bohemian Massif, overlain by a thin tongue of lowermost Turonian Eibrunn Formation. A detailed record of the positive δ13C excursion of the global Oceanic Anoxic Event (OAE) 2 has been retrieved from this shallow-water setting. An integrated approach of bio-, event-, carbon stable isotope and sequence stratigraphy was applied to correlate the sections and to decipher the dynamics of this overall transgressive depositional system. The Cenomanian successions show five prominent unconformities, which correlate with those being known from basins in Europe and elsewhere, indicating their eustatic origin. The rate of sea-level rise during the CTBE suggests glacio-eustasy as a driving mechanism for Late Cenomanian sea-level changes. The Regensburg and Eibrunn formations of the lower Danubian Cretaceous Group are highly diachronous lithostratigraphic units. Their regional distribution and northeast-directed onlap pattern onto the southwestern margin of the Bohemian Massif can readily be explained by the lateral movements of roughly coast-parallel (i.e., NW/SE-trending) facies belts of a graded shelf system transgressing on a northeastwardrising substrate. It took the Cenomanian coastline ca. 6 Ma to transgress from southwest of Regensburg to the topographically elevated granite cliffs southeast of Roding in the Bodenwöhrer Senke (=60 km distance). © 2010 Springer-Verlag.

Richardt N.,Senckenberg Naturhistorische Sammlungen Dresden | Wilmsen M.,Senckenberg Naturhistorische Sammlungen Dresden | Niebuhr B.,Bayerisches Landesamt fur Umwelt
Facies | Year: 2013

The Upper Cenomanian-Lower Turonian litho-stratigraphic units of the Danubian Cretaceous Group of the proximal Bodenwöhrer Senke (Regensburg, Eibrunn and Winzerberg formations, the latter consisting of a lower Reinhausen Member and an upper Knollensand Member), have been investigated with a focus on facies analysis and sequence stratigraphy. Analyses of litho-, bio-, and microfacies resulted in the recognition of 12 predominantly marine facies types for the Eibrunn and Winzerberg formations. Petrographic and paleontological properties as well as gradual transitions in the sections suggest that their depositional environment was a texturally graded, predominantly siliciclastic, storm-dominated shelf. The muddy-siliceous facies types FT 1-3 have been deposited below the storm wave-base in an outer shelf setting. Mid-shelf deposits are represented by fine- to medium-grained, bioturbated, partly glauconitic sandstones (FT 4-6). Coarse-grained, gravelly and/or shell-bearing sandstones (FT 7-10) developed in the inner shelf zone. Highly immature, arkosic coarse-grained sandstones and conglomerates (FT 11 and 12) characterize an incised, high-gradient braided river system. The Winzerberg Formation with its general coarsening- and thickening-upward trend reflects a regressive cycle culminating in a subaerial unconformity associated with a coarse-grained, gravelly unit of marine to fluvial origin known as the "Hornsand" which is demonstrably diachronous. The overlying Altenkreith Member of the Roding Formation signifies the onset of a new transgressive cycle in the early Middle Turonian. The sequence stratigraphic analysis suggests that the deposition of the Upper Cenomanian and Lower Turonian strata of the Bodenwöhrer Senke took place in a single cycle of third-order eustatic sea-level change between the major sequence boundaries SB Ce 5 (mid-Late Cenomanian) and SB Tu 1 (Early-Middle Turonian boundary interval). The southeastern part of the Bodenwöhrer Senke was flooded in the mid-Late Cenomanian (Praeactinocamax plenus transgression) and a second transgressive event occurred in the earliest Turonian. In the central and northwestern parts of the Bodenwöhrer Senke, however, the initial transgression occurred during the earliest Turonian, related to pre-transgression topography. Thus, the Regensburg and Eibrunn formations are increasingly condensed here and cannot be separated anymore. Following an earliest Turonian maximum flooding, the Lower Turonian Winzerberg Formation filled the available accommodation space, explaining its constant thickness of 35-40 m across the Bodenwöhrer Senke and excluding tectonic activity during this interval. Rapid sea-level fall at SB Tu 1 terminated this depositional sequence. This study shows that Late Cenomanian-Early Turonian deposition in the Bodenwöhrer Senke was governed by eustatic sea-level changes. © 2012 Springer-Verlag Berlin Heidelberg.

Niebuhr B.,Bayerisches Landesamt fur Umwelt | Richardt N.,Senckenberg Naturhistorische Sammlungen Dresden | Wilmsen M.,Senckenberg Naturhistorische Sammlungen Dresden
Acta Geologica Polonica | Year: 2012

The Upper Turonian Großberg Formation of the Regensburg area (Danubian Cretaceous Group, Bavaria, southern Germany) has a mean thickness of 20-25 m and consists of sandy bioclastic calcarenites and calcareous sandstones which are rich in bryozoans, serpulids and bivalves (oysters, rudists, inoceramids). Eight facies types have been recognized that characterize deposition on a southward dipping homoclinal ramp: the inner ramp sub-environment was characterized by high-energy sandwave deposits (sandy bioclastic rud- and grainstones, bioclastic sandstones) with sheltered inter-shoal areas. In mid-ramp settings, bioturbated, glauconitic, calcareous sand- and siltstones as well as bioturbated, bioclastic wacke- and packstones predominate. The carbonate grain association of the Großberg Formation describes a temperate bryomol facies with indicators of warm-water influences. An inferred surplus of land-derived nutrients resulted in eutrophic conditions and favoured the heterozoan communities of the Großberg Ramp. Carbon stable isotope geochemistry cannot significantly contribute to the stratigraphic calibration of the Großberg Formation due to the depleted and trendless bulk-rock δ13C values, probably resulting from a shallow-water aquafacies with depleted δ13CDIC values and low δ13C values of syndepositional and early diagenetic carbonate phases. However, strongly enriched skeletal calcite δ13C values support a correlation of the Großberg Formation with the mid-Late Turonian positive Hitch Wood isotope event (Hyphantoceras Event of northern Germany). This interpretation is supported by biostratigraphic data and a range from the Mytiloides striatoconcentricus Zone into the lower My. scupini Zone is indicated by inoceramid bivalves. Both the base and top of the Großberg Formation are characterized by unconformities. Sequence boundary SB Tu 4 at the base is a major regional erosion surface (erosional truncation of the underlying Kagerhöh Formation in the Regensburg area, fluvial incision at the base of the Seugast Member of the Roding Formation in the Bodenwöhr area towards the north and northeast). It is suggested that this unconformity corresponds to a major sea-level drop recognized in many other Cretaceous basins below the Hitch Wood or Hyphantoceras Event. The transgression and highstand of the Großberg Formation is concomitant to the deposition of the fluvial Seugast Member and the onlap of the marginal-marine "Veldensteiner Sandstein" onto the Fränkische Alb. The unconformity at the top of the Großberg Formation (late Late Turonian SB Tu 5) is indicated by a ferruginous firm-/ hardground and an underlying zone of strongly depleted δ13C values. The abrupt superposition by deeper marine marls of the lower Hellkofen Formation (uppermost Turonian-Lower Coniacian) may be connected with inversion tectonics at the southwestern margin of the Bohemian Massif.

This paper presents petrographic, geochemical and geochronological data for distinct, leucocratic, garnet bearing gneisses from the eastern Bavarian Forest (Aubach, Passauer Wald), which are considered as possible analogues of the Moldanubian HP-HT granulites of the Gföhl Unit in Bohemia. This lithological correlation is supported by several lines of evidence: (1) Although the gneisses from Aubach are strongly overprinted by the late Variscan LP-HT metamorphism of the Bavarian orogenic phase, relics of the typical HP-HT mineral paragenesis garnet-kyanite-ternary feldspar can be identified. Distinctive rutile exsolutions can be observed in garnet, similar to the HP-HT granulites of the Gföhl Unit. (2) Major trace and rare earth elements, as well as Rb-Sr and Sm-Nd isotope data for the gneisses from Aubach are fully compatible to data published for the granulites of the Gföhl Unit. (3) Zircon crystals separated from the Aubach gneisses show the same anhedral morphologies and the same high-CL metamorphic overgrowth shells, which are reported for zircons of the HP-HT granulites of the Gföhl Unit. SHRIMP dating of these rims provides a metamorphic age of 340 ± 4 Ma, which is identical to the age of granulite metamorphism established in the Gföhl Unit and in other parts of the Bohemian Massif. © 2012 E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany.

Siebel W.,University of Tübingen | Shang C.K.,University of Tübingen | Thern E.,Curtin University Australia | Danisik M.,University of Waikato | Rohrmuller J.,Bayerisches Landesamt fur Umwelt
International Journal of Earth Sciences | Year: 2012

Correct interpretation of zircon ages from high-grade metamorphic terrains poses a major challenge because of the differential response of the U-Pb system to metamorphism, and many aspects like pressure-temperature conditions, metamorphic mineral transformations and textural properties of the zircon crystals have to be explored. A large (c. 450 km2) coherent migmatite complex was recently discovered in the Bohemian Massif, Central European Variscides. Rocks from this complex are characterized by granulite- and amphibolite-facies mineral assemblages and, based on compositional and isotopic trends, are identified as the remnants of a magma body derived from mixing between tonalite and supracrustal rocks. Zircon crystals from the migmatites are exclusively large (200-400 μm) and yield 207Pb/206Pb evaporation ages between 342-328 Ma and single-grain zircon fractions analysed by U-Pb ID-TIMS method plot along the concordia curve between 342 and 325 Ma. High-resolution U-Pb SHRIMP analyses substantiate the existence of a resolvable age variability and yield older 206Pb/238U ages (342-330 Ma, weighted mean age = 333.6 ± 3.1 Ma) for inner zone domains without relict cores and younger 206Pb/238U ages (333-320 Ma, weighted mean age = 326.0 ± 2.8 Ma) for rim domains. Pre-metamorphic cores were identified only in one sample (206Pb/238U ages at 375.0 ± 3.9, 420.3 ± 4.4 and 426.2 ± 4.4 Ma). Most zircon ages bracket the time span between granulite-facies metamorphism in the Bohemian Massif (~345 Ma) and the late-Variscan anatectic overprint (Bavarian phase, ~325 Ma). It is argued that pre-existing zircon was variously affected by these metamorphic events and that primary magmatic growth zones were replaced by secondary textures as a result of diffusion reaction processes and replacement of zircon by dissolution and recrystallization followed by new zircon rim growth. Collectively, the results show that the zircons equilibrated during high-grade metamorphism and record partial loss of radiogenic Pb during post-peak granulite events and new growth under subsequent anatectic conditions. © 2012 Springer-Verlag.

Korner W.,Bayerisches Landesamt fur Umwelt | Walker G.,Emden Leer University of Applied Sciences
Gefahrstoffe Reinhaltung der Luft | Year: 2013

The various methods for sampling and sample processing of house dust for analysis of semi volatile organic compounds (SVOC) were summarized in the German guideline VDI 4300-8 "Measurement of indoor air pollution - sampling of house dust" in 2001. However, this guideline was withdrawn in 2012 because of an increasing number of cases in which analyses of house dust were performed inadequately and results misinterpretated although referring to this guideline. Some cases even ended up in wrong recommendations for rehabilitation of buildings. This paper summarizes the different applications of house dust analyses. Frequently occurring errors of sampling and interpretation of results are described.

Franz C.,Bayerisches Landesamt fur Umwelt | Schulze M.,Bayerisches Landesamt fur Umwelt
Grundwasser | Year: 2016

For accurate planning of vertical borehole heat exchanger systems, knowledge of thermo-physical ground parameters is critical. This study reports laboratory-measured thermal conductivity and diffusivity values of Mesozoic sandstones (Lower and Middle Buntsandstein) from four wells. The measurements were made on drill core using an optical scanning method. The mean thermal conductivities of the sandstones range between 2.6 ± 0.3 W / (m · K) and 3.1 ± 0.4 W / (m · K) for dry conditions and between 3.6 ± 0.3 W / (m · K) and 4.1 ± 0.6 W / (m · K) after saturation with water. The mean thermal diffusivity values range between (1.6 ± 0.2) · 10− 6 m2 / s for dry and (2.0 ± 0.6) · 10− 6 m2 / s for water-saturated sandstones. Thermal properties are closely related to the petrography and lithostratigraphy of the sandstones. Additionally, three temperature correction methods were applied for the purpose of evaluating the comparative accuracy and the correction schemes with respect to local in-situ conditions. The results show that the temperature corrections proposed by Somerton (Thermal properties on temperature-related behavior of rock/fluid systems, Elsevier, New York, S 257, 1992) and Sass et al. (J Geophys Res, 97:5017–5030, 1992) are most suited for the respective sandstone data set. © 2016, Springer-Verlag Berlin Heidelberg.

Loading Bayerisches Landesamt fur Umwelt collaborators
Loading Bayerisches Landesamt fur Umwelt collaborators