398 Works

Feasibility Study of Monitoring Delft Geothermal Project Using Land Controlled-Source Electromagnetic Method

Mahmoud Eltayieb , Dieter Werthmüller , Guy Drijkoningen & Evert Slob
Delft geothermal project (DAPwell) is a planned geothermal well doublet, where relatively cold water is going to be injected through one well into a low enthalpy geothermal reservoir to produce hot water from the other well. The volume of the cold water around the injection well will increase over time and, in the end, result in a thermal breakthrough. Thus, it is essential to trace the time-lapse change in the volume of the cold water...

Design and application of messenger nanoparticle tracers for multi-parameter reservoir exploration

Laura Spitzmüller , Jonathan Berson , Bastian Rudolph , Fabian Nitschke , Thomas Schimmel & Thomas Kohl
The inaccessibility of geothermal reservoirs makes the accurate determination and monitoring of reservoir properties and conditions difficult and is a major problem in reservoir engineering. We present an approach for the development of messenger nanoparticle tracers for the simultaneous determination of flow paths ("tracer") and reservoir properties ("messenger"), with a proof-of-concept example of flow-through experiments and temperature detection under controlled laboratory conditions. For this, silica particles are synthesized with a two-layer architecture, an inner closed...

CDGP- a gateway to geothermal data in Alsace

Marc Schaming , Mathieu Turlure , Marc Grunberg & Jean Schmittbuhl
The CDGP [https://cdgp.u-strasbg.fr], Data Center for Deep Geothermal Energy, was created in 2016 by the LabEx G-Eau-Thermie Profonde (continuing now in ITI GeoT) [https://geot.unistra.fr/], to archive the high-quality data collected in the Upper Rhine Graben geothermal sites and to distribute them to the scientific community for R activities, taking Intellectual Property Rights into account. It manages seismological (catalogues, waveforms, focal mechanisms), seismic, hydraulic, geological, and other data related to anthropogenic hazard from different phases of...

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...

Large hydraulic diffusivity of a single fault

Qinglin Deng , Guido Blöcher , Jean Schmittbuhl & Mauro Cacace
We provided an approach to estimate hydraulic diffusivity of a single fault by solving the linear diffusion equation in a partly open rough fracture under drained conditions when applying small pressure drop fluctuations (10^-5 Pa) along the fault. In contrast to the traditional calculation for the fracture hydraulic diffusivity using parameters such as hydraulic aperture, fluid compressibility, fluid viscosity, we here directly used time-dependent pressure profile p(x, y, t) to match the analytical solution for...

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....

Seismic Monitoring of DeepStor: Using low-cost sensors for ambient noise correlation methods and Citizen Science

Johannes Käufl , Eva Schill & Thomas Kohl
DeepStor is an experimental facility with the goal to investigate High Temperature Aquifer Thermal Energy Storage (HT-ATES) systems at KIT Campus North. The operational seismic monitoring of DeepStor includes a network of five broadband and one borehole seismometer. In addition, we plan to install a scientific monitoring network with low-cost seismometers (such as the Raspberry Shake and the Quakesaver Hidra) to test innovative monitoring methods and for a Citizen Science project. Ambient noise tomography and...

Simulation of flow through a single fracture calibrated with air permeameter measurements

Marco Fuchs , Sina Hale , Gabriel C. Rau , Kathrin Menberg & Philipp Blum
Determining fluid flow through natural fractures is an important task in many geoscience-related fields, such as geothermics. In order to estimate crucial parameters of single fractures controlling the flow and flow distribution, for example hydraulic apertures, hydro-mechanical numerical models have been established in recent years in addition to experimental methods. Although models enable a greater variety of analyses, they still require time-consuming processing before and after the simulation. This study presents a novel workflow for...

Carbonate microfacies and transgressive-regressive cycles of Oxfordian shallow-water limestones (Korallenoolith, Lower Saxony Basin)

Deyan Zhang , Stefan Huck & Ulrich Heimhofer
During the Oxfordian stage, the Lower Saxony Basin (LSB) was covered by a shallow epicontinental sea (Ziegler 1990), in which a thick succession of marine limestones and marls was deposited. Unfortunately, the scarcity of open marine marker fossils and numerous sedimentary gaps make it diffcult to correlate strata from the LSB with Oxfordian deposits elsewhere in the world (Betzler et al. 2007; Zuo et al. 2017). In a first step, this study therefore aims at...

Cementation rates of detrital platform carbonates and sequence stratigraphic implications

Thomas Mann & Hildegard Westphal
Different views exist on the prevalent processes that control transport and deposition of detrital platform carbonates in a sequence stratigraphic framework. While some models indicate that meteoric cementation during sea-level lowstands retards sediment transport into deeper basins, others imply marine cementation during highstands as dominant process affecting the architecture of carbonate depositional sequences. These opposing views are based on observations from the Bahamian archipelago, an isolated carbonate platform with a significantly higher carbonate saturations state...

Deposition of Subglacial Lake Sediments underneath the Laurentide Ice Sheet? – Sediment Cores from Lake Melville, Canada, provide first Evidence

Sophie Kowalski, Christian Ohlendorf, Jens Matthiessen & Andrea Catalina Gebhardt
Lake Melville is a fjord-type lake located in Labrador, Eastern Canada, as part of the Hamilton Inlet System. It is significantly characterised by its eastern connection to the Labrador Sea through a shallow sill at the entrance to the Rigolet Narrows. In contrast, the western part of the lake receives freshwater input from several major rivers. Previous studies assumed that Lake Melville was fully excavated by the Laurentide Ice Sheet (LIS) during the last glacial....

Millennial variability, hydrological and limnological changes during MIS3-2 in Lake Petén Itzá, Guatemala

Rodrigo Martinez-Abarca, Michelle Abstein , Philipp Hoelzmann , Thorsten Bauersachs , Liseth Pérez , Mona Stockhecke , Sergio Cohuo Duran & Antje Schwalb
Heinrich Stadials and Greenland Interstadials are abrupt climate variations that are observed in the Northern Hemisphere throughout Marine Isotopic Stages (MIS) 3-2. Lake Petén Itzá, northern Guatemala, is a key site for paleoclimate investigations due to its sensitivity to changes in climate forcing such as the Intertropical Convergence Zone (ITCZ) and the Atlantic Meridional Overturning Circulation (AMOC). In this study, we reconstructed the hydrology and limnology of Lake Petén Itzá during MIS3-2 based on geochemical...

Paleoclimate reconstruction using Pleistocene paleosols along the middle Atbara River in Eastern Sudan

M. Mohammednoor, Robert Bussert , S. Tsukamoto , M. Richter , O. El Bedri , B. Kraatz , K. Salih , J. Müller , A. Eisawi & F. Bibi
Along the middle Atbara River, Pleistocene alluvial sediments dated to ~200 to 20 ka are exposed in eastern Sudan over a length of about 200 km with a maximum thickness of 50 m. The Atbara River today has its headwaters in the northern Ethiopian Plateau and is the last major tributary of the Nile before it flows through the Sahara. Previous studies and our fieldwork since 2018 have resulted in extensive finds of fossil terrestrial...

Numerical modeling of the stress state around the Enguri power tunnel

Thomas Niederhuber , Birgit Müller , Thomas Röckel, Mirian Kalabegishvili & Frank Schilling
The Enguri Dam in NW Georgia is one of the highest arch dams in the world. The 15 km power tunnel was initially flooded in 1978. During the rehabilitation project from January - April 2021, an 40 m long open construction-joint was observed. The construction-joints are located on both sides in the lower third of the tunnel, but only the construction-joint on the valley side showed an opening character. The research question of the paper...

Challenges and approach to a geological 3-D modeling workflow to identify potential areas for a repository for high-level radioactive waste.

Julia Rienäcker-Burschil , Christian Buxbaum-Conradi & Standortauswahl Team
In 2020, the Bundesgesellschaft für Endlagerung mbH (BGE) published the Sub-areas Interim Report, identifying areas with favorable geological conditions for a deep repository site for storage of high-level radioactive waste in Germany. One key step was the identification of geological settings, where potential host rock formations (claystone, rock salt and crystalline rock) fulfil legally defined minimum requirements, e.g. depth (> 300 m), areal extension (varying between host rocks), and vertical thickness (> 100 m). Therefore,...

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...

Ecotoxicological effects of rare earth elements on early life stages of fish

Stefania Piarulli , Bjørn Henrik Hansen , Frida Fossum , Florence Kermen , Bjarne Kvæstad , Pål A. Olsvik & Julia Farkas
Rare earth elements, comprising the 15 lanthanoids (LN; IIIb in the Periodic Table) plus yttrium are critical elements for a wide range of applications, including new and traditional industries as renewable energy, automotive industries, metallurgy as well as agriculture and medical diagnostics. Rising REY production and use can lead to an increased release into the environment and represents a potential environmental concern. However, the bioavailability and effects of REY and anthropogenic REY-chemical complexes (ACC-REY) remain...

Hydrogen and organic molecules generation from water radiolysis: from grave to cradle

Johan Vandenborre & Laurent Truche
Water radiolysis is a key process for hydrogen (H2) and abiotic organic molecules generation in the Earth’s crust. The aim of this presentation is to provide some insight into this process from a radiochemist viewpoint. We will transpose the knowledge we gain from water radiolysis in the context of radioactive waste disposal to natural geological settings and draw important conclusions for deep microbial ecosystems development and abiotic organic synthesis. Some examples will be given about:...

Data Journals - Bridging the worlds of data and research

David Carlson , Kirsten Elger , Jens Klump , Ge Peng & Johannes Wagner
In less than one decade the open-access data journal Earth System Science Data (ESSD, a member of the Copernicus Open Access Publisher family) grew from a start-up venture into one of the highest-rated journals in global environmental science. Stimulated by data needs of the International Polar Year 2007-2008, ESSD now serves a very broad community of data providers and users, ensuring that users get free and easy access to quality data products and that providers...

The ICDP Oman Drilling Project – Implications from drill core GT1 on magmatic processes beneath fast-spreading mid-ocean ridges

Dominik Mock , David Axford Neave , Samuel Müller , Dieter Garbe-Schönberg , Benoit Ildefonse , Jürgen Koepke & Oman Drilling Project Science Team
A key aim of the ICDP Oman Drilling Project is to constrain magmatic processes beneath fast-spreading mid-ocean ridges. Several drill cores from the Samail ophiolite (Oman), which is regarded as the best-preserved piece of ancient oceanic lithosphere on land, were obtained. Drill core GT1 covers about 400 m from the layered gabbro section between ~1200 and 800 m above the mantle transition zone (maM). The vast majority of the samples recovered are (olivine-) gabbros with...

The EXCITE-network: providing access to leading-edge electron and X-ray microscopy facilities for geo-materials research

Oliver Plümper , Veerl Cnudde , Geertje ter Maat , Sylvia Walter , Richard Wessels & the EXCITE network
Understanding earth materials is critical to creating a sustainable, carbon-neutral society due to their involvement in many vital processes. Earth materials control the feasibility of subsurface energy storage, geothermal energy extraction, and are a source of critical elements. However, perturbations to geological systems can also result in hazards, such as human-induced earthquakes. If we want to tackle current, pressing scientific questions related to sustainable development for a circular economy, there is an urgent need to...

Soil gas monitoring for identifying potential ground movements and earthquakes in the frame of mine flooding - Requirements, methods and developments

Olaf Ukelis , Roman Zorn & Detlev Rettenmaier
European Institute for Energy Research, Germany(1);Soil gas surveys (e.g. 222Rn, CO2, O2 etc.) are very well known in diverse backgrounds such as the detection of geological faults, prediction of earthquakes or monitoring of gas contamination risks at building sites. Risk monitoring using soil gases in the frame of mine flooding is a quite new field of application currently investigated in the frame of the German BMBF funded project FloodRisk. Analogies to some of the classical...

Nephelinites from the Gregory Rift

Michael Marks, Michelle Siegel , Mika Henzler , Thomas Binder , Simon Braunger, Thomas Wenzel , Anatoly Zaitsev , Andrei Arzamastsev & Gregor Markl
Nephelinites are strongly SiO2-undersaturated volcanic rocks that are often associated with phonolites and carbonatites. In the Gregory Rift in East Africa several major nephelinitic-phonolitic volcanoes occur, with some of them being associated with carbonatitic rocks (e.g., Oldoinyo Lengai, Kerimas, Mosonik, Shombole, Meru), while others lack carbonatites (e.g, Sadiman, Essimingor, Burko). We characterize the magmatic evolution of the Burko volcano and compare our results with published data from spatially associated nephelinite-phonolite±carbonatite associations in the Gregory Rift...

Cyclic loading of magnetite bearing rocks: modifications of structure, magnetic and elastic properties

Helena Fuchs , Boris Reznik , Agnes Kontny & Frank Schilling
Repeated seismic activity can cause progressive failure of rock masses due to material fatigue [1]. To simulate induced seismic loading, an iron ore with alternating quartz- and magnetite-rich layers from the Sydvaranger mine (Finnmark/Norway) was subjected to laboratory uniaxial compressional cyclic loading at low stresses in the range of elastic deformation (about 6 MPa static ±3 MPa dynamic pressure) and frequencies related to induced seismicity (10 – 100 Hz) [2]. Some of the experiments were...

Registration Year

  • 2022
    398

Resource Types

  • Text
    396
  • Conference Paper
    1
  • Other
    1

Affiliations

  • Karlsruhe Institute of Technology
    52
  • Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences
    36
  • Federal Institute for Geosciences and Natural Resources
    27
  • Technical University of Darmstadt
    19
  • University of Bremen
    17
  • University of Tübingen
    14
  • RWTH Aachen University
    14
  • Leibniz University Hannover
    12
  • University of Bern
    9
  • Technische Hochschule Georg Agricola
    9