26 Works

TRIM4Post-Mining: an integrated planning tool for the transition from coal extraction to re-vitalized post-mining landscape

Hernan Flores , Diego Restrepo , Natalie Merkel , Stefan Möllerherm & Jörg Benndorf
Forschungszentrum Nachbergbau, Technische Hochschule Georg Agricola, Bochum(1);Technische Universität Bergakademie Freiberg, Freiberg(2);The TRIM4Post-Mining project aims to develop an integrated information modeling system to support decision-making and planning during the transition from coal exploitation to a re-vitalized post-mining landscape, enabling infrastructure development for agricultural and industrial uses and contributing to the recovery of energy and materials from coal mining dumps. This modeling system will be composed of a high-resolution spatiotemporal database founded on state-of-the-art multi-scale and multi-sensor...

3D geological modeling of graben structures in northern Hesse – concept, methods and first results

Ina Lewin, Rouwen Lehné & Heiner Heggemann
For some years now, the Hessian Agency for Nature Conservation, Environment and Geology (HLNUG) is focusing its 3D-modeling activities on urban areas, aiming to contribute to both integrated modeling and urban planning (e.g., Lehné et al. 2017, Lehné et al. 2013, Budde et al. 2017). Experiences gained in the frame of the project “Darmstadt_3D”, which is delivering the urban subsurface including the technical infrastructure (sewage system, foundations, etc.), now are adopted for a working area...

Tectonic and environmental perturbations at the Permian-Triassic boundary: insights from the Blue Nile River Basin in central Ethiopia

Maryam Mansouri , Matthias Hinderer , Laura Stutenbecker , Guido Meinhold , Enkurie L. Dawit , Jasper Berndt & Robert Bussert
The Blue Nile River Basin contains a thick fluvio-lacustrine sediment succession of Permian to Jurassic age. Its evolution is linked to extensional tectonics during break-up of Pangea in the aftermath of the Carboniferous-Permian glaciation. We collected sandstone samples from several sections in order to study the tectonic evolution and possible impacts of environmental perturbation around the Permian-Triassic boundary. Based on thin-section petrography, bulk-rock geochemistry, heavy mineral spectra, and detrital zircon U-Pb ages we are able...

Reconstruction of Miocene geodynamics in the Central Alps using detrital garnet geochemistry in sandstones of the Swiss foreland basin

Daniela Krieg & Laura Stutenbecker
The geodynamics in the Central Alps during the Miocene were majorly characterized by the exhumation of crystalline basement, the so-called external crystalline massifs. Their exhumation had a major impact on the evolution of relief, distribution of drainage networks and sediment-generation. The timing of their first surficial exposure and their total thickness still remains debated. The Swiss Molasse Basin contains ~35 to 13 Ma old clastic deposits that were mostly derived from the immediate hinterland and...

Hydro-thermal modeling of geothermal energy extraction from Soultz-sous-Forêts, France using supercritical CO2

Mrityunjay Singh , Saeed Mahmoodpour , Kristian Bär & Claire Bossennec
Climate change requires immediate action, and for sustainable development, and uninterrupted energy supply is necessary. Since anthropogenic emission of CO2 in the atmosphere has a major role in climate change, carbon negative energy solutions are the necessity of the time. Geothermal energy is one such renewable source that can assist in achieving an economic solution to low carbon energy. Engineered geothermal systems or enhanced geothermal systems (EGS) are more suitable from an industrial perspective and...

GeoLaB - Geothermal Laboratory in the Crystalline Basement

Thomas Kohl , Eva Schill , Judith Bremer , Günter Zimmermann , Olaf Kolditz & Ingo Sass
In Central Europe, the largest geothermal potential resides in the crystalline basement rock with important hotspots in tectonically stressed areas. To better harvest this energy form under sustainable, predictable and efficient conditions, new focused, scientific driven strategies are needed. Similar to other geo-technologies, the complex processes in the subsurface need to be investigated in large-scale facilities to ensure environmental sustainability. The proposed new underground research laboratory GeoLaB (Geothermal Laboratory in the Crystalline Basement) will address...

Granulometric and lithologic control on heavy mineral distribution in Alpine fluvial sediment

Ariane Djahansouzi, Laura Stutenbecker, Daniela Krieg & Christoph Glotzbach
Heavy mineral studies are dependent on many variables that should be considered in order to avoid erroneous provenance interpretations. Firstly, sediment transported and deposited by larger rivers is the result of the erosion of several lithological units present in the catchment with potentially differing mineral fertilities. Secondly, possible bias arises from the narrow sand-size window that is typically considered for single-grain analysis in sedimentary provenance studies. Quantifying and understanding the resulting bias is crucial for...

The temporal variability of sediment composition in modern rivers: provenance or grain size signal?

Laura Stutenbecker
The first step in any provenance study is sampling the sediment of interest, which is subject to many potential sources of error. It is nevertheless commonly assumed that one sample of sediment is enough to provide a somewhat “basin-averaged” compositional signal. Spatial or temporal variability of this signal is often not considered. In this study, we test the temporal variability of sediment composition in modern fluvial deposits in four German rivers: the Gersprenz, Modau and...

Pre-Variscan (Lower Devonian) deformation of the Silurian magmatic arc of the East Odenwald (Mid-German Crystalline Zone, Variscides)

Henri Paul Meinaß , Wolfgang Dörr & Eckardt Stein
The Böllstein Odenwald is forming a large anticline of mainly pre-Devonian rock in the Mid-German Crystalline Zone (MCGZ). The contact between core and schist envelope of the anticline is well exposed at Weichberg quarry. Metasedimentary rocks of the schist envelope are intruded by granodioritic sills of a Silurian magmatic arc, showing at least two folding phases: Recumbent tight isoclinal folds are overprinted by upright gentle folds. A pegmatite dike, intruding at 411 ±2 Ma (U-Pb...

Light at the end of the well: A compact and low-cost DIY water level meter

Nils Michelsen
Goundwater level data are a crucial element of water resources assessments. Corresponding measurements are often carried out with electric water level tapes, which are – despite their simple concept – relatively expensive. Here, I present a low-cost alternative, consisting of an ordinary measuring tape and an off-the-shelf “LED bait” (actually used for fishing). The latter is simply attached to the tape with a binder clip and starts flashing upon water contact. At reasonable depth-to-water conditions...

Digging into Eocene hothouse climate variability: Linking X-ray fluorescence (XRF) scanning and palynology of Messel sediment cores

Stefanie Kaboth-Bahr , André Bahr , Olaf Lenz , Volker Wilde , Sonja Wedmann & Jörg Pross
The late early to early middle Eocene (~48 Ma) maar lake sediments of the famous Messel fossil-pit, located near Darmstadt, SW Germany, represent a prime archive for climate dynamics operating during the geologically most recent greenhouse period of the Earth. In this study, we investigate the potential of geochemical data obtained via high-resolution XRF core scanning to decipher hydrologic variability from the Messel sediments. Such data have the potential to yield insight into the paleoenvironmental...

3D Basin modelling of the northern Upper Rhine Graben : insights on geothermal fluid pathways

Gillian Bethune , Adriana Lemgruber-Traby , Claire Bossennec , Kristian Bär , Jeroen van der Vaart , Christine Souque & Renaud Divies
The area of the Upper Rhine Graben (URG) is known for its geothermal potential. However, the recent interest for lithium co-production from geothermal brines raises questions about the quantification and dynamics of fluid flow paths in the geothermal system at the basin scale. This study aims to better understand the impact of the fluid circulation on the temperature field evolution and on the fluid recharge by performing a 3D thermal basin modeling. The Buntsandstein group...

Approach for the development of a radon potential map for the Darmstadt area

Anastasia Vogelbacher, Rouwen Lehné & Eric Petermann
Hessian Agency for Nature Conservation, Environment and Geology, Rheingaustraße 186, 65203 Wiesbaden, Germany(2);Federal Office for Radiation Protection, Radon und NORM, Köpenicker Allee 120 - 130, 10318 Berlin, Germany(3);Radon (Rn)is a naturally occurring, radioactive gas that is considered an indoor air pollutant. Due to its negative effects on human health, a Germany-wide "Radon Potential Action Plan" was implemented based on the European Directive for Radiation Protection (2013/59/Euratom). As part of this action plan, areas with high...

Exploration of the geologic and hydrogeologic conditions for a medium deep borehole high-temperature thermal energy storage system at TU Darmstadt, Germany

Lukas Seib , Bastian Welsch , Matthis Frey , Claire Bossennec , Kristian Bär & Ingo Sass
Solutions for seasonal energy storage systems are an essential component for the reliable use of fluctuating renewable energy sources and to bridge the gap between abundant heat availability from renewable sources in summer and an increased heat demand in winter. As a part of the research project ’solar crystalline borehole thermal energy storage system‘ – ‘SKEWS’, a field-scale demonstrator for a medium deep borehole thermal energy storage (BTES) system with a maximum depth of 750...

Gravity survey in delineating geologic features of interest for deep geothermal use at Campus North of KIT.

Maximiliano Pavez , Natalia Cornejo , Florian Bauer & Eva Schill
The seasonal mismatch of the thermal energy demand can be addressed by thermal energy storage systems of high capacity (e.g. Lee 2013). In this scenario, High-temperatures aquifer thermal energy storage systems (HT-ATES), which commonly supply domestic needs could expand to meet heating or industrial processes demands by storing excess heat. DeepStor is a planned scientific infrastructure that address the demonstration the concept of HT-ATES in former hydrocarbon reservoirs of deep sedimentary rocks. Specifically, the concept...

Transition from hydrocarbon production to geothermal heat storage in the Upper Rhine Graben – the DeepStor project

Eva Schill , Jens Grimmer , Katharina Schätzler , Kai Stricker , Judith Bremer & Thomas Kohl
The subsurface conditions of the Upper Rhine Graben are favorable for the development of novel geothermal utilization concepts. In particular, they allow optimization of energy use with flexible heat production and storage scenarios. A first potential analysis revealed an enormous storage potential of formerly used and well-explored oil fields. The involvement of former hydrocarbon reservoirs as components of geothermal concepts perfectly symbolizes the transition from the fossil-fuel age to the use of carbon-neutral renewable energies....

Granulometric and lithologic control on apatite and zircon concentrations in Alpine fluvial sediment

Daniela Krieg, Laura Stutenbecker , Ariane Djahansouzi & Christoph Glotzbach
Detrital heavy mineral compositions are controlled by many factors such as mineral fertility in the source rocks and hydraulic sorting. Quantifying and understanding the resulting bias is crucial especially for the correct interpretation of single-grain analyses such as apatite or zircon geochronology in provenance studies. In this study, an inter- and intrasample comparison of apatite and zircon concentrations is conducted on modern Alpine fluvial sands from five mono-lithological catchments draining granitoid, ophiolitic, metamorphic and sedimentary...

Sediment production under semi-arid climatic conditions using heavy mineral and petrographical data – a case study from the recent Kunene river system, northern Namibia

Jonas Kraus, Ali Abbas Wajid, Laura Stutenbecker & Matthias Hinderer
Provenance techniques are widely applied in resolving the origin of ancient sediment successions. Petrographic signatures, however, are controlled by a complex interplay of rock type, weathering mode as well as sediment transport, thus making the interpretation of data often ambiguous. One way to improve our understanding on these mechanisms is to study modern drainage systems. We selected the Kunene River in northern Namibia as a case study. This river system is well suited for such...

Insights from surface analogues of the Odenwald into the structural architecture of crystalline units in the Northern Upper Rhine Graben

Claire Bossennec , Matthis Frey , Lukas Seib , Jeroen van der Vaart , Kristian Bär & Ingo Sass
The Upper Rhine Graben (URG) is a target area for deep geothermal and heat storage projects, as petrophysical and hydraulic properties of the faulted crystalline basement rocks, and the temperature field comprise a high geothermal potential (Soultz-sous-Forêts, Landau, Insheim, Rittershoffen). However, there is a lack of knowledge on the multi-scale structural architecture of such rock units in fault zones. Therefore, a multi-scale structural analysis is performed on surface analogues to improve the conceptual crystalline reservoir...

Reasons and implications of fossil hydraulic gradients in large-scale aquifer systems

Stephan Schulz , Hyekyeng Jung , Marc Walther , Nils Michelsen , Randolf Rausch & Christoph Schüth
Due to limited availability of surface water, many arid and semi-arid countries have to rely on their groundwater resources. Despite the quasi-absence of present-day replenishment, some of these aquifers contain large amounts of water that was recharged during wetter periods in the past. Although these recharge events often occurred several thousand years ago, some of these so-called fossil aquifer systems exhibit considerable hydraulic gradients and flow towards their discharge areas, even without pumping. As a...

Rock alteration at the post-Variscan nonconformity: implications for Permo-Carboniferous surface weathering versus burial diagenesis

Fei Liang , Adrian Linsel , Matthias Hinderer , Jens Hornung , Dirk Scheuvens & Rainer Petschick
Nonconformity surfaces are key features to understand the relations among climate, lithosphere and tectonic movements in Earth history. One of the most prominent stratigraphic surfaces in Central European is the post-Variscan nonconformity separating the metamorphic Variscan basement from non-metamorphic platform deposits starting in the Upper Carboniferous, but more widely distributed since the Permian. This study aimed to analyze and distinguish the physical and chemical processes happening during exposure of the surface as well as during...

Stormwater harvesting in ephemeral streams: how to effectively bypass clogging layers and thick vadose zones

Jose David Henao Casas , Fritz Kalwa , Marc Walther & Randolf Rausch
In drylands, stormwater is often collected in surface basins and subsequently stored in shallow aquifers via infiltration to cope with water scarcity. These groundwater recharge schemes are often accompanied by high evaporation rates and hygiene problems due to low infiltration rates, which are a consequence of clogging layers on the topsoil and the presence of a thick vadose zone. The present study aims to develop a conceptual solution to increase groundwater recharge rates in stormwater...

Structural and Geophysical Characterisation of the Crystalline Basement in the Northern Upper Rhine Graben

Matthis Frey , Claire Bossennec , Lukas Seib , Kristian Bär & Ingo Sass
In the northern Upper Rhine Graben (URG), the crystalline basement constitutes an attractive target for deep geothermal exploitation due to the favourable reservoir temperatures and abundance of natural fractures and large-scale faults. Consequently, especially the upper, hydrothermally altered part is already successfully used for heat and power generation at several locations (Insheim, Landau, Rittershoffen and Soultz-sous-Forêts). Nevertheless, because of the small number of very deep boreholes drilled into the crystalline basement, little is known about...

Effect of the fracture aperture distribution on the heat extraction performance from the fractured geothermal systems

Saeed Mahmoodpour , Mrityunjay Singh , Kristian Bär & Ingo Sass
Fractures are main flow paths for heat extraction from fractured geothermal systems. The process of injecting cold water to extract hot water from a fractured reservoir results in thermal and poroelastic stresses in the rock matrix. Therefore, these thermo-hydro-mechanical (THM) mechanisms govern the efficiency of an enhanced geothermal system (EGS) operation. Fractures’ aperture is a controlling factor for the heat extraction efficiency. Due to the lack of field and experimental works, a constant aperture is...

Hydro-mechanical parameters of Cornubian and Odenwald reservoir granitoids with focus on fracture stiffness testing

Lena Muhl , Guido Blöcher , Ingo Sass , Christian Kluge & Tanja Ballerstedt
For the resource development, geothermal systems need to be improved to increase the profitability of the investment. One aspect to support this aim is the reservoir productivity, a key parameter, which depends on the hydraulic and mechanical properties of the reservoir formation. In order to develop possible improvement strategies for the profitability enhancement of geothermal reservoirs and/or nuclear waste repositories, hydraulic and mechanical properties of artificial generated fractures were investigated. The importance of the fracture...

Registration Year

  • 2022
    26

Resource Types

  • Text
    26

Affiliations

  • Technical University of Darmstadt
    20
  • TU Darmstadt
    5
  • Karlsruhe Institute of Technology
    4
  • Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences
    3
  • Helmholtz Centre for Environmental Research
    2
  • Hessian Agency for Nature Conservation, Environment and Geology
    2
  • TU Dresden
    2
  • Goethe University Frankfurt
    2
  • //ror.org/031vc2293:TU Bergakademie Freiberg
    1
  • Keele University
    1