308 Works

Hyperspectral analysis of lacquer peel profiles as quasi-in-situ analysis for tailings exploration

Wilhelm Nikonow & Dieter Rammlmair
Three lacquer peel profiles were prepared from a copper tailings deposit in Central Chile. The peels were taken from two sides at varying depths of the tailings heap. Parallel to that, samples were taken from each layer within the peels for bulk XRF analysis and particle size analysis. The peels were analysed by Hyperspectral Imaging (HSI, VNIR- SWIR, 400 – 2500 nm wavelength) with the Specim SisuRock system and µXRF mapping using M4 Tornado Plus...

Sustainability in energy storages - How modern geoscience concepts can improve underground storage monitoring

Benjamin Haske , Tobias Rudolph & Bodo Bernsdorf
Technische Hochschule Georg Agricola, Germany(1);Re-using of large-volume salt caverns for the intermediate storage of liquid and gaseous energy carriers is an indispensable step on the way to a sustainable energy economy. Continuous development of methods for monitoring these facilities is a crucial part of the social license to operate. In the research project "Monitoring system for the safety of cavern storage facilities using satellite and unmanned aerial system (UAS) data" (KaMonSys), safety solutions for critical...

Behaviour of metals in the geothermal fluid system of the Upper Rhine Graben: Lithium

Michèle Jungmann , Benjamin Walter , Elisabeth Eiche , Tobias Kluge , Dominik Gudelius & Jochen Kolb
Karlsruhe Institute of Technology, Germany(1);In order to increase the economic potential of geothermal power plants in view of environmental protection and sustainability, there are considerations to extract critical raw materials (CRM), such as lithium, from the geothermal fluids. The Upper Rhine Graben (URG) in southern Germany is of particular interest as it represents a hydrothermal fluid reservoir with large CRM potential. Apart from the sedimentary strata with different reservoir rocks and associated fluids, their Variscan...

The Paleozoic supercontinent cycle and regional tectonics

Uwe Kroner , Tobias Stephan & Rolf L. Romer
TU Bergakademie Freiberg(1);GFZ Potsdam, Germany(2);University of Calgary, Canada(3);Ancient plate boundary processes define the first order architecture of consolidated continental crust. Therefore, regional tectonic features allow for the reconstruction of plate tectonic processes. Here we explain the Paleozoic tectonics of various orogens of Europe and both Americas in terms of the Pannotia – Pangea supercontinent cycle. Early Paleozoic separation of Gondwana and Siberia from the eastern and western edges of North America, respectively, is compensated by...

Probabilistic Machine Learning for improved Decision-making with 3-D Geological Models

Florian Wellmann , Miguel de la Varga , Nilgün Güdük , Jan von Harten , Fabian Stamm , Zhouji Liang & s.Mohammad Moulaeifard
Geological models, as 3-D representations of subsurface structures, can be combined with gravity inversions to obtain geometric representations of geological objects with similar porperty distributions. These models are built on prior assumptions and imperfect information, and they often result from an integration of geological and geophysical data types with varying quality. These aspects result in uncertainties about the predicted subsurface structures and property distributions, which will affect the subsequent decision process. We discuss approaches to...

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...

Reconstruct sedimentation rate and time from downhole logging data at Lake Chalco, Central México

Mehrdad Sardar Abadi , Christian Zeeden & Thomas Wonik
Leibniz Institute for applied Geophysics, Germany(1);Understanding the evolution of lower latitude climate from the most recent glacial periods to post-glacial warmth in the continental tropical regions has been obstructed by a lack of continuous geological records. Here we present results from a lacustrine record from tropical North America. Specifically, we examine sediments from Lake Chalco, located in the Valley of Mexico, central Mexico (19°30’N, 99°W). The basin represents a hydrological closed system surrounded by the...

Short-term terrestrial climate variability through MIS 3 and Termination 1

Daniel. Veres
Marine Isotope Stage (MIS) 3 represents a critical interval for understading the response of terretrial environments to rapid climate change driven by orbital focring. As the primary constituent of loess and a major driver in global climate forcing, mineral dust serves as a proxy that allows for direct comparison of loess data with chronologically better resolved ice and lake records. Motivated by the recent emergence of high-resolution magnetic and sedimentological data on European loess-paleosol profiles,...

Hydrocarbon Migration and its Implications for Hydrocarbon Exploration and Charge Risk Assessment: Case Studies from the Persian Gulf, Iran

Alireza Baniasad & Ralf Littke
Historically, basin and petroleum system modeling has mainly focused on understanding the burial and thermal history of sedimentary rocks as well as related hydrocarbon generation from kerogen (sedimentary organic matter) in source rocks; much less studies treated hydrocarbon migration and accumulation in great detail, although it is of uttermost importance for petroleum exploration and production. New 2D and 3D basin models in different parts of the Persian Gulf indicate the variable complexity of hydrocarbon migration...

Recent headwall deglaciation and retreat from cosmogenic 10Be in medial moraine debris of a Swiss valley glacier

Katharina Wetterauer, Dirk Scherler , Leif S. Anderson & Hella Wittmann
Debris-covered glaciers are fed from steep bedrock hillslopes that tower above the ice, so-called headwalls. Recent observations in high-alpine glacial environments suggest that rock walls are increasingly destabilized due to climate warming. An increase in debris delivery to glacier surfaces will modify glacial mass balances, as surface debris cover impacts on the melt behavior of the ice underneath. Consequently, we expect that the response of debris-covered glaciers to climate change is likely linked to how...

Linking Laser-Ablation ICP-MS analysis and sulfide textures in identifying gold remobilization and enrichment processes in modern seafloor massive sulfides, Kolumbo arc volcano, Greece

Stephanos P. Kilias , Evangelia Zygouri , Nikolaos Zegkinoglou , Manuel Keith , Thomas Zack , Daniel J. Smith , Paraskevi Nomikou & Paraskevi Polymenakou
Target settings to secure sustainable access to raw materials include seafloor massive sulphide (SMS) resources. Gold-rich SMS deposits, are often the result of complex interplay of multiple Au enrichment events. Recent studies have shown that high-grade Au ores result from Au remobilization from preexisting mineralization, driven by fluid-induced coupled dissolution-reprecipitation (CDR) reactions; however investigations into this process in modern Au-rich SMS, are lacking. To tackle this issue, Au-rich [AuBULK≤32ppm; Au/(Cu+Zn+Pb)=1.9], polymetallic (Sb, Tl, Hg, Ag,...

Raw materials for our everyday life in the context of museum education

Maryam Junge , Melanie Kaliwoda & Wolfgang W. Schmahl
The need of raw materials for our society and our everyday life steadily increased during the last decades. In particular, the technological development demands for a secure supply as well as increasingly more metals. Therefore, a secured supply of raw materials is crucial for the economy worldwide. The supply risks of metals due to limited availability from only few countries became a political debate during the last decade, .i.e. defining the term critical raw materials....

Tectonic accretion controls erosional cyclicity in the Himalaya

Dirk Scherler , Sanjay Kumar Mandal & Hella Wittmann
Indian Institute of Science Education and Research Kolkata, Mohanpur, India(3);The evolution of Earth’s climate over geological timescales is linked to surface erosion by weathering of silicate minerals and burial of organic carbon. However, methodological difficulties in reconstructing erosion rates through time and feedbacks among tectonics, climate, and erosion spurred an ongoing debate on mountain erosion sensitivity to tectonic and climate forcing. A key question is whether late Cenozoic climate cooling has increased global erosion rates...

Underground Hydrogen Storage (UHS) – status quo and perspectives in Germany

Matthias Warnecke & Simone Röhling
Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), Germany(1);Recently, politics and industry has discussed green hydrogen as one of the carbon-zero energy sources of the future. Besides many other countries, Germany formulates clear goals for the energy transition from fossil to hydrogen energy in its "National Hydrogen Strategy". In order to ensure steady supply of hydrogen and to secure national reserves the underground storage of hydrogen (UHS) is increasingly coming into focus. Germany already has extensive experience...

Automated heavy mineral analysis of silt-sized sediment by artificial-intelligence guided Raman Spectroscopy

Nils Keno Lünsdorf , Jan Ontje Lünsdorf , Gábor Újvári & Hilmar von Eynatten
Compositional data on heavy minerals is fundamental in sedimentary provenance analysis. Typically, this data is gathered by optical microscopy and more recently, by mineral chemical analysis (MLA, QEMSCAN) or Raman micro-spectroscopy. In silt-sized sediments optical microscopy is unfeasible. We introduce a systematic and highly efficient approach to assess the heavy mineral composition in fine grain-size fractions (10-30 µm and 30-62 µm) by Raman micro-spectroscopy. The approach starts with a web-application that creates and visualizes large...

Ultramafic-hosted volcanogenic massive sulfide deposits: an overlooked sub-class of VMS deposits forming in complex tectonic environments?

Clifford Patten , Rémi Coltat , Malte Junge , Alexandre Peillod , Marc Ulrich , Gianreto Manatschal & Jochen Kolb
Institute of applied geochemistry, KIT, Germany;Laboratoire de Géologie, CNRS-UMR 8538, Ecole Nationale Supérieure de Paris, France;Mineralogical State Collection Munich, Germany;Department of Geological Sciences, Stockholm University, Sweden;Institut Terre et Environnement de Strasbourg, CNRS-UMR 7063, Université de Strasbourg, France;Volcanogenic massive sulphide (VMS) deposits have been recognized both in fossil and present-day settings (e.g. mid-ocean ridges (MORs), back-arcs, island-arcs, fore-arcs) and are associated with different lithologies leading to variable metal enrichments. More recently, a sub-type of VMS associated...

The value of heat interconnection pipelines in the use of deep geothermal energy

Markus Loewer , Maximilian Keim , Anahi Molar-Cruz & Christopher Schifflechner
Over the past fifteen years, Bavaria has become a hotspot for deep geothermal utilization in Europe. There are now 24 plants operating in the Molasse Basin that provide climate-friendly heat, electricity and cooling. For example, the state capital plans to cover its district heating supply in a climate-neutral manner and largely from deep geothermal energy by 2040. However, the use of deep geothermal energy is not limited to Munich. The demand for space heating and...

Levelized costs and economic impacts of geothermal district heating networks: a decision tree analysis

Astu Sam Pratiwi & Evelina Trutnevyte
Geothermal district heating networks are among the key options to decarbonize the heating sector in the State of Geneva in Switzerland. But the development of geothermal district heating requires high capital costs and involves risk of not finding sufficient geothermal resources, which make these systems less competitive. On the other hand, building geothermal district heating creates a wider impact on the economy, domestically and overall. But such impact has rarely been evaluated. Our study aims...

Geothermal potential and opportunities in Vietnam

Viet Cao
Located between the Pacific Ring of Fire and Alpide Belt, Vietnam possesses significant potential geothermal resources, with more than 300 hot spring sites with temperatures from 40oC to 100oC have been detected in the territory. Based on available data, Vietnam is estimated to have a geothermal potential of up to 400 MW power generation. A pilot 25MW power plant was constructed in 2013 in Đakrông - Quảng Tri Province, central of Vietnam. From geothermal measurements...

Parametric optimization and comparative study of an organic Rankine cycle power plant for two-phase geothermal sources

Chaofan Chen , Francesco Witte , Ilja Tuschy , Olaf Kolditz & Haibing Shao
For two-phase geothermal resource, Organic Rankine Cycle (ORC) based binary plant is often applied for power production. In this work, a network topology was built with the Thermal Engineering Systems in Python (TESPy) software to simulate the stationary operation of the ORC plant. With this topology, the performance of nine different working fluids are compared. From the thermodynamic perspective, the gross and net power output is optimized respectively. Results show that R600 has the highest...

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...

Registration Year

  • 2022

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  • Karlsruhe Institute of Technology
  • Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences
  • Federal Institute for Geosciences and Natural Resources
  • Technical University of Darmstadt
  • University of Bremen
  • RWTH Aachen University
  • University of Tübingen
  • Ludwig-Maximilians-Universität München
  • University of Strasbourg
  • ETH Zurich