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Lehne R.J.,TU Darmstadt | Hoselmann C.,Hessisches Landesamt fur Umwelt und Geologie HLUG | Heggemann H.,Hessisches Landesamt fur Umwelt und Geologie HLUG | Budde H.,TU Darmstadt | Hoppe A.,TU Darmstadt
Zeitschrift der Deutschen Gesellschaft fur Geowissenschaften | Year: 2013

In cooperation with the Hessian Agency for the Environment and Geology (HLUG) a GIS and gOcad based 3D model of the Quaternary has been developed for the northern Upper Rhine Graben, which hosts the metropolitan region of Frankfurt/Rhine-Main. With 9798 quality checked wells and information from hydrocarbon exploration insights regarding the depth level of the Base Quaternary were derived, which required a modification of the up to now assumed geometry of the Quaternary sediment body. The base Quaternary is affected tectonically, leading to a differentiation of the study area into at least five homogeneity regions. Differentiation into several homogeneity regions is also supported by respective sequential consistency. Considering the tectonic inventory, the base Quaternary, especially in the southern part of the study area, is located significantly deeper than has been assumed up to now. In addition, in the western part of the study area, the base Quaternary shows stepwise offsets, which have been caused by tectonic faults. Up to now an assumed outcrop of the Quaternary in that area could not be verified. New knowledge about the geometry of the Quaternary has significant influence on current issues, particularly on groundwater and related modelling. All data and results of the ongoing project are available for the HLUG on several platforms (GeODin, ArcGIS, gOcad) as both vector and raster data and support daily decision making processes in order to address the increasing pressure related to the utilisation of natural resources - soils, groundwater, raw materials, geothermal energy, building area - and the resulting land use conflicts. © 2013 E. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, Germany.

Freymark J.,Helmholtz Center Potsdam | Freymark J.,RWTH Aachen | Sippel J.,Helmholtz Center Potsdam | Scheck-Wenderoth M.,Helmholtz Center Potsdam | And 5 more authors.
Energy Procedia | Year: 2015

We present a seismic- and 3D-gravity-constrained lithospheric-scale 3D structural model of Hessen that differentiates 7 sedimentary units, 5 Variscan upper crustal bodies, the lower crystalline crust and the lithospheric mantle. To predict the present- day subsurface temperatures, we solve the steady-state conductive heat equation by using a 3D FE method and assigning lithology-dependent thermal properties. We show that the thermal field is mainly controlled by the varying radiogenic heat production in the crystalline crust, which results in a colder NW and a warmer SE domain. Locally, this regional trend is superimposed by thermal blanketing of low-conductive sediments leading to higher temperatures. © 2015 The Authors.

Stuckrad S.,Cooperation Technology | Sabel K-J.,Hessisches Landesamt fur Umwelt und Geologie HLUG | Wilcke W.,University of Bern
European Journal of Soil Science | Year: 2010

Soils frequently develop from mixtures of different parent materials. We quantified the contributions of different parent materials to the substrate for recent soil development using trace metal concentrations and Pb isotope ratios as input data for end-member mixing analyses (EMMAs). We examined six transects (320-775 m) at two sites in the Rhenish Slate Mountains. Soil types ranged from acid Cambisols to stagnic Luvisols developed from periglacial cover-beds. Sixteen O, 11 A, 120 B and 10 C horizons were analysed for total trace metal concentrations and partly also 206Pb:207Pb ratios. Most metal concentrations in the B horizons were in the background range, except for Pb, which partly had elevated concentrations of up to 135 mg kg-1. The depth distribution of metal concentrations and 206Pb:207Pb ratios suggested that metals deposited from the atmosphere had hardly reached the B horizons. A principal component analysis (PCA) of the trace element concentrations in the 120 B horizons identified four main metal sources of the B horizons, which we interpreted as bedrock (slate), loess, Laacher See tephra (LST) resulting from the last volcanic eruption in the Eifel mountains and ore veins. The slate was characterized by Cr and Zn, the loess by Zr, the LST by Nb and the ore veins by Pb. Based on EMMAs with four end-members using two different sets of tracers (Set 1: concentration ratios of Zr:Cr, Nb:Cr, Pb:Cr, Set 2: Zr:Zn, Nb:Zn, and Pb:Zn), slate, loess and LST contributed, on average, 39-40, 22-24 and 37-38%, respectively, at Site 1 and 19-21, 53-63 and 18-26%, respectively, at Site 2. In contrast, the ore contribution was consistently estimated at 0%. An additional EMMA with two end-members based on the 206Pb:207Pb ratios estimated the contribution of the ore at 0.02%. We conclude that EMMAs based on trace element concentrations and isotope ratios provide a tool for determining the contribution of different parent materials to the substrate from which soils develop, at least at a small regional scale and if an appropriate tracer that distinguishes all the considered substrates is found. © 2010 The Authors. Journal compilation © 2010 British Society of Soil Science.

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