361 Works

Barite precipitation was associated with low temperature hydrothermal venting in the 3.2 Ga Mapepe Formation, Barberton Greenstone Belt

Paul Mason, Desiree Roerdink & Dylan Wylmeth
Utrecht University, The Netherlands (1); University of Bergen, Norway (2); Institut de Physique du Globe de Paris, CNRS, France (3)

Sulfate minerals are rare in the geological record prior to 2.2 Ga. This is consistent with prevalent anoxic conditions in the Earth’s surface environment prior to the great oxidation event, and correspondingly low levels of sulfate in the Archean ocean. In contrast to this general scarcity, extensive barite (BaSO4) deposits are found in...

Energy storage in salt caverns: Technical, regulatory and societal challenges from an energy and mining perspective

Serge van Gessel, Isis van Wetten, Gregor Schneider & Ingrid Kroon
TNO - Geological Survey of the Netherlands, Utrecht, Netherlands (1); DEEP-KBB GmbH, Hannover, Germany (2)

Rock salt is an abundant mineral typically applied in chemical industry, food industry and road de-icing. Besides extraction from seawater and surface occurrences, subsurface mining is common practice in several European countries (e.g. Netherlands, Germany, UK, Poland, France, Portugal, Denmark) and accounts for ca. 60% of all salt produced. The northern parts of Germany and the Netherlands have...

Not only beautiful crystals - Alpine-type fissures in the light of quartz fluid inclusion, structural and monazite age data

Christian A. Bergemann, Edwin Gnos , Joseph Mullis, Emmanuelle Ricchi , Emilie Janots & Alfons Berger
Heidelberg University, Germany (1); Natural History Museum of Geneva, Switzerland (2); University of Basel, Switzerland (3); University of Geneva, Switzerland (4); University of Grenoble, France (5); University of Bern, Switzerland (6)

The retrograde evolution of an orogen is characterized by a variety of processes like tectonic activity in the form of doming, brittle-ductile shearing and a general decrease in temperature conditions. These processes are accompanied by hydrothermal activity along shear zones and cracks in...

Petrophysical Evaluation of Nubian Sandstone Reservoir Sarir Field - Southeast Sirt Basin

Omar Mohammed Reema
Ajdabiya University, Libya

The work was carried out to evaluate the petrophysical characteristics of Nubian sandstone in Sarir field. The data used in this study were mainly wire-line logs from three wells (D11-BLK9, D13-BLK9 and D14-BLK9). The aim of this study is to do the formation evaluation using petrophysical parameters from wire-line logs in order to determine lithology, porosity, permeability and fluid saturation and to understand the importance of the analysis and distribution of...

Drillcore GT1 of the ICDP Oman Drilling Project: insights into magmatic processes beneath fast-spreading mid-ocean ridges

Dominik Mock, Benoit Ildefonse, Dieter Garbe-Schönberg, Samuel Müller, David Axford-Neave, Jürgen Koepke & Diverse Science Team
The Samail ophiolite in Oman provides an ideal field laboratory for investigating the processes taking place beneath fast-spreading mid-ocean ridges (MORs). Drill site GT1, which was sampled by the Oman Drilling Project in the frame of the International Continental Scientific Drilling Program (ICDP), is located in Wadi Gideah (Wadi Tayin massif). Here, a reference profile through the entire Oman paleocrust was established [1] such that GT1 can be embedded into the surface profile. The core...

Subsurface data availability: benchmarking data access arrangements in several Western European countries

Eline Van Malderen & Guido Hoetz
KU Leuven, Belgium (1); EBN, Netherlands, The (2)

During the current energy transition, understanding our deep subsurface appears more important than ever. Traditional energy resources such as oil and gas might remain dominant in coming years but are also becoming more controversial and more difficult to exploit. With the rising trend of geothermal energy, our geological resources remain pivotal in supplying tomorrows clean energy. With a treasure of subsurface data being gathered in past...

The StraboSpot data system for geological information: An overview

Basil Tikoff, Julie Newman, J Douglas Walker, Randy Williams & Vasileios Chatzaras
StraboSpot is a geologic data system that is designed to allow researchers to digitally collect, store, and share both field and laboratory data (Walker, J.D., et al., 2019, StraboSpot data system for Structural Geology, Geosphere). It was designed originally for structural geology data, but has been extended to field-based sedimentology and petrology, experimental deformation, and microanalysis. The data system uses two main concepts - spots and tags - to organize data. A spot characterizes a...

Prospectivity mapping of phosphor in Europe; a part of the GEOERA-FRAME project

Martiya Sadeghi, Guillaume Bertrand, Sophie Decree & Daniel P. S. de Oliveira
SGU: Geological Survey of Sweden, Uppsala, Sweden (1); BRGM: French geological survey, Orléans Cedex, France (2); GSB: Royal Belgian Institute of Natural Sciences – Geological Survey of Belgium (3); LNEG: Laboratório Nacional de Energia e Geologia, Amadora, Portugal(4) The prime aim of WP 3 in the FRAME project is to produce a map of Strategic and Critical Raw Materials (SCRM) for Europe. Another main objective is the predictive targeting based on GIS exploration tools and...

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...

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