47 Works

Additional file 1 of The impact of hydrothermal alteration on the physiochemical characteristics of reservoir rocks: the case of the Los Humeros geothermal field (Mexico)

Leandra M. Weydt, Federico Lucci, Alicja Lacinska, Dirk Scheuvens, Gerardo Carrasco-Núñez, Guido Giordano, Christopher A. Rochelle, Stefanie Schmidt, Kristian Bär & Ingo Sass
Additional file 1: Table S1. Major (wt%) and trace element (ppm) concentrations of the outcrop and reservoir samples. Table S2. Chemical indices of the outcrop and reservoir samples. Table S3. Cross-correlations of selected major, trace, and rare-earth elements. Table S4. Concentration changes in % of major and trace elements of the reservoir samples. Table S5. P-values obtained during Kruskal–Wallis tests.

Climate, volcanoes, and tectonic activity - Their influence on the lower to middle Eocene paleoenvironment on the Sprendlinger Horst (Southwest Germany)

Maryam Moshayedi , Olaf K. Lenz , Jürgen Mutzl , Volker Wilde & Matthias Hinderer
The Werra-Fulda mining district located in Central Germany hosts a world-class deposit of sulfate bearing potash salts. The Permian (Zechstein, ca. 255 Ma) evaporite sequence was intruded by mafic melts in the Neogene resulting in magmatic dykes as well as sill structures frequently observed in the subsurface mining galleries. Furthermore, volcanic rocks intersect the overlaying strata (mainly Buntsandstein and Muschelkalk) at localized spots forming distinct mountains. In this study, samples from subsurface mafic dykes 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...

Additional file 3 of Perceived environmental barriers and facilitators of refugee children’s physical activity in/around refugee accommodation: a qualitative case study in Berlin

Siqi Chen & Martin Knöll
Additional file 3. (a) playable clock poll example for children in stage I; (b) environmental scale paper example for children’s drawing in A3 paper.

Additional file 2 of Perceived environmental barriers and facilitators of refugee children’s physical activity in/around refugee accommodation: a qualitative case study in Berlin

Siqi Chen & Martin Knöll
Additional file 2. Questionnaire for children in stage I (English version).

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...

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...

SpannEnD - The crustal stress state of Germany

Steffen Ahlers , Andreas Henk , Tobias Hergert , Karsten Reiter , Birgit Müller , Luisa Röckel , Oliver Heidbach , Sophia Morawietz , Magdalena Scheck-Wenderoth & Denis Anikiev
Information about the recent stress state of the upper crust is important for understanding tectonic processes and for the use of the underground in general. A currently important topic, the search for a radioactive waste deposit, illustrates this relevance, as the crustal stress state is decisive for the short and long-term safety of a possible repository. For example, the integrity of the host rock due to the activation or reactivation of faults and associated fluid...

Additional file 3 of Perceived environmental barriers and facilitators of refugee children’s physical activity in/around refugee accommodation: a qualitative case study in Berlin

Siqi Chen & Martin Knöll
Additional file 3. (a) playable clock poll example for children in stage I; (b) environmental scale paper example for children’s drawing in A3 paper.

Additional file 1 of Perceived environmental barriers and facilitators of refugee children’s physical activity in/around refugee accommodation: a qualitative case study in Berlin

Siqi Chen & Martin Knöll
Additional file 1. Questionnaire for parents of their children’s daily playing (English version)*.

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...

Additional file 1 of SAFit2 reduces neuroinflammation and ameliorates nerve injury-induced neuropathic pain

Saskia Wedel, Praveen Mathoor, Oliver Rauh, Tim Heymann, Cosmin I. Ciotu, Dominik C. Fuhrmann, Michael J. M. Fischer, Andreas Weigert, Natasja de Bruin, Felix Hausch, Gerd Geisslinger & Marco Sisignano
Additional file 1: Figure S1. Gene expression of neuronal stress and oxidative stress markers in lumbar DRGs and spinal cord of SAFit2 treated mice 21 days after SNI. Figure S2. Cytokine and chemokine levels in lumbar DRGs and spinal cord of SAFit2 treated SNI mice after 21 days. Figure S3. Synthesis of ddSAFit 12 and competitive fluorescence assay (FPA) of SAFit2 and ddSAFit2. Figure S4. Cytotoxic and metabolic influence of SAFit2 on primary bone marrow...

Work-Based Learning in Manufacturing Industry. A Sector-Based Meta-Analysis

Steffen Nixdorf, Fazel Ansari, Sebastian Schlund, Matthias Wolf, Maria Hulla, Maximilian Papa, Sebastian Bardy, Antonio Kress & Jannik Rosemeyer
This Whitepaper has been put forward by the Working Group of Work-Based Learning of the International Association of Learning Factories (IALF). It discusses a meta analysis of work-based learning approaches in manufacturing.

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...

Wie ›Der Mann auf dem Hochrad‹ den Protagonisten des ›Schlangenbaums‹ auf Abwege führte. Hypothesengeleitete stilometrische Untersuchung zweier Romane Uwe Timms

Mareike Schumacher
Gegenstand dieses Artikels ist die Verknüpfung einer hypothesengeleiteten literaturwissenschaftlichen Fallstudie mit der Anwendung von Digital-Humanities-Verfahren. Primärtexte der Analyse sind dreizehn längere Erzähltexte des deutschsprachigen Gegenwartsautors Uwe Timm (Romane und Novellen, eine »Legende«). Aus einer seiner Selbstaussagen zum Werk leite ich Thesen ab, die ich mittels computergestützter stilometrischer Verfahren analysiere. Ziel ist es, eine Brücke zwischen einer computationellen Analyse und menschlichen Lesarten zu schlagen, um so zu neuen Einsichten über das literarische Werk des Autors zu...

Additional file 4 of Perceived environmental barriers and facilitators of refugee children’s physical activity in/around refugee accommodation: a qualitative case study in Berlin

Siqi Chen & Martin Knöll
Additional file 4. A1 poster example for unstructured interviews in stage II (process material).

Additional file 1 of Perceived environmental barriers and facilitators of refugee children’s physical activity in/around refugee accommodation: a qualitative case study in Berlin

Siqi Chen & Martin Knöll
Additional file 1. Questionnaire for parents of their children’s daily playing (English version)*.

The SpannEnD project – Towards a robust prediction of the 3D stress state in the upper crust of Germany

Karsten Reiter , Steffen Ahlers , Sophia Morawietz , Luisa Röckel , Tobias Hergert , Andreas Henk , Birgit Müller & Oliver Heidbach
The assessment of the long-term stability of geological units in the context of subsurface use is a complex topic in which various geoscientific and technical aspects play an important role. For example, the geomechanical stability of radioactive waste repositories due to endogenous, exogenous and engineering processes is an important aspect in the long term. For a stability prognosis, an estimation of the recent stress state as well as an assessment of realistic future stress changes...

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...

Registration Year

  • 2022
    47

Resource Types

  • Text
    47

Affiliations

  • Technical University of Darmstadt
    26
  • TU Darmstadt
    20
  • Tianjin University
    8
  • Sun Yat-sen Memorial Hospital
    8
  • Southern Medical University
    8
  • Shenzhen University
    8
  • Nantong University
    8
  • China Medical University
    8
  • Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences
    7
  • Karlsruhe Institute of Technology
    6