459 Works

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....

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...

Industrial revolution 4.1 - Critical raw materials and their role in the shift towards renewable energy generation and e-mobility

Ernst Bernhard Teigler , Stephan Peters & Torsten Gorka
Most countries are by now committed to the Paris Agreement, which deals mainly with the reduction of greenhouse gas emissions and financing thereof. Crucial pillars driving this greenhouse gas diminution are renewable energies and e-mobility. As in any industrial revolution, this fundamental shift from “fossil energy” towards renewable energies and e-mobility, requires new technologies and associated new suite of raw materials, without which this shift will not be possible or at least significantly delayed. Energy...

Reassessing evidence of Moon-Earth dynamics: No evidence of shorter lunar months from tidal bundles at 3.2 Ga (Moodies Group, Barberton Greenstone Belt)

Christoph E. Heubeck & Tom Eulenfeld
The sole Archean data point to reconstruct past orbital parameters of the Earth’s moon is from the Moodies Group (ca. 3.22 Ga) of the Barberton Greenstone Belt. From time-series analysis of tidal bundles of a subaqueous sand wave, Eriksson and Simpson (2000) suggested that the Moon’s anomalistic month at 3.2 Ga was closer to 20 days than the present 27.5 days. This is in apparent accordance with models of orbital mechanics which place the Archean...

Source of metals in ultramafic-hosted VMS deposits: insight from the Troodos ophiolite and ODP Hole 735B

Clifford Patten , Malte Junge & Alexandre Peillod
Volcanogenic massive sulfide (VMS) deposits associated with mafic-ultramafic rocks show strong structural control and are located at or in the vicinity of low angle detachment faults such as oceanic core complexes (OCC) in mid-ocean ridge environments. These ultramafic VMS deposits are variably enriched in precious (Au-Ag) critical (Co) and the base metals Cu, Zn, and Ni but the source of the metals remains poorly known. The Troodos ophiolite, Cyprus, and the ODP Hole 735B on...

The data publication chain of the EPOS Multi-scale Laboratories

Geertje ter Maat & the MSL Team
EPOS (the European Plate Observing System) is a pan-European e-infrastructure framework with the goal of improving and facilitating the access, use, and re-use of Solid Earth science data. The EPOS Thematic Core Service Multi-scale Laboratories (TCS MSL) represents a community of European Solid Earth sciences laboratories including rock and magma high-temperature and high-pressure experimental facilities, electron microscopy, micro-beam analysis, analogue modelling of tectonic, geodynamic, and volcanological processes, paleomagnetism, and analytical laboratories. Experimental data from these...

Sequence stratigraphy of the Moodies Group (3.2 Ga), Barberton Greenstone Belt, South Africa

Deon J. Janse van Rensburg , Christoph Heubeck & Sebastian Reimann
The Moodies Group (~3.2 Ga) of the Barberton Greenstone Belt is one of the oldest and best-preserved shallow-water siliciclastic sequences. It also harbors one of the largest occurrences of Paleoarchean microbial mats and the oldest record of early Earth-Moon dynamics. The extent (ca. 40 km * 70 km), lithologic and alluvial-to-prodeltaic facies diversity (incl. paleosols, pedogenic concretions and microbial mats etc.) , good outcrop, and excellent preservation of Moodies strata allows the recognition of mappable...

Depletion, Density, and Deposits through the mantle transition zone (MTZ)

Thorsten Joachim Nagel , Anders Vesterholt & Christian Schiffer
We present phase diagrams of variously enriched and depleted mantle rocks down to 800 kilometers depth and explore density as the parameter governing convection and compositional stratification. Some results are surprising and not all are included in present concepts and models: (1) Primitive and enriched mantle compositions are buoyant in the uppermost lower mantle compared to depleted mantle, especially, when they are warmer, but also at identical temperatures. Hence, if the upper mantle is depleted...

Systematic analysis of precision, long-term stability and data processing of MC-ICP-MS 230Th/U-dating of secondary carbonates

Inga Kristina Kerber , Fabian Kontor , Jennifer Arps , René Eichstädter , Sophie Warken & Norbert Frank
MC-ICP-MS has become the clearly dominant technology in 230Th/U-dating over the last 20 years. The ongoing increase in measurement performance allows for ε-precision by now (Andersen et al., 2004; Cheng et al., 2013) and enabled the production of a large amount of datasets and insights covering a broad range of fields. Despite this large database, systematic studies on the impact of individual corrections on the raw data, long-term instrumental stability and on data processing routines...

A virtual field tour of the Wren's Nest National Nature Reserve, part of the Black Country Unesco Geopark, UK

David Hodgetts
The Wren's Nest National Nature Reserve, situated in the West Midlands, UK, is well known for its exposures of Silurian (Wenlock and Ludlow Series) carbonates. The Wren’s Nest was first recognised as a nature reserve in 1965, and in 2020 it became recognised as part of the part of the Black Country Unesco Geopark. The area has significant geological importance due to the superb preservation of its fossils, with more than 700 macro fossil species...

Icelandia

Gillian R. Foulger
The potential for the extraordinary island of Iceland to resolve seemingly intransigent problems in Earth Science has long been recognized. Alfred Wegener correctly surmised that his theory of continental drift could be tested there, and the necessary geodetic measurements were started as early as 1938. This, and other geophysical work often produced unexpected results. For example, observations reported before the acceptance of Wegener's hypothesis apparently supported it, while observations reported after its widespread acceptance seemed...

A profile through ancient fast-spreading oceanic crust in the Wadi Gideah, Oman ophiolite – reference frame for the crustal drillings within the ICDP Oman Drilling Project

Jürgen Koepke , Dieter Garbe-Schönberg , Dominik Mock & Samuel Müller
The Oman Ophiolite is the largest and best-investigated piece of ancient oceanic lithosphere on our planet. This ophiolite was target of the Oman Drilling Project (OmanDP) within the frame of ICDP (International Continental Scientific Drilling Program) which aimed to establish a comprehensive drilling program in order to understand essential processes related to the geodynamics of mid-ocean ridges, as magmatic formation, cooling/alteration by seawater-derived fluids, and the weathering with focus on the carbonatisation of peridotites. Over...

Molybdenum isotope evidence for forearc mantle recycling at the Tongan subduction zone

Qasid Ahmad , Martin Wille , Stephan König , Carolina Rosca , Angela Hensel , Thomas Pettke & Jörg Hermann
Molybdenum isotope ratios (δ98/95Mo) of marine sediments constitute an important tracer for paleoredox reconstructions of the ancient ocean. Due to its redox-sensitivity, significant mass-dependent Mo isotope fractionation is induced in present-day low temperature environments leading to distinct Mo concentrations and isotope compositions in different marine lithologies. Subduction and recycling of such fractionated material can thus be potentially traced in arc magmas. Indeed, Mo isotope variations are observed in mafic arc lavas that are attributed to...

Relict permafrost features identification in landscape and deposits of Borisoglebsk Upland, Central European Russia

Ekaterina V. Garankina , Vasily A. Lobkov , Ilya G. Shorkunov & Vladimir R. Belyaev
Relict permafrost features (RPF) indicated by specific patterns of soil, sedimentary and landform structure are characteristic of Central Russian Plain watersheds. Paleocryogenic polygonal networks appear in a pattern of semi-regular spots, blocks and polygons on the surface usually associated with pseudomorphs of ice wedges or sand casts in correlated deposits. This research aimed at distinguishing RPF in sedimentary structure and its correlation with the modern and paleolandscape structure of 3 ha watershed area exposed in...

Occurrences and mineralogy of lithium pegmatite in eastern Canada and for example the Georgia Lake pegmatite in more detail

Stephan Peters , Florian Lowicki , Ernst-Bernhard Teigler , Torsten Gorka , Florian Beier & Jana Rechner
Eastern Canada hosts several occurrences of lithium pegmatite, which have recently come into the focus of exploration activities and detailed studies. Driven by the current and expected future demand for Li, the mineral occurrences are targeted by exploration companies. This area in Canada is currently in the focus for targeting the mineral occurrences of lithium pegmatite. The majority of the pegmatite are hosted in metasediments or biotite-rich granite. In the more northern part the host...

Cliff coast collapses driven by nested biological, astronomical and meteorological activity cycles

Michael Dietze , Kristen L. Cook , Luc Illien , Oliver Rach & Niels Hovius
Cliffs line many erosional coastlines. Localized failures can cause land loss and hazard, and impact ecosystems and sediment routing. Links between cliff erosion and forcing mechanisms are poorly constrained, due to limitations of classic approaches. Combining multi-seasonal seismic and drone surveys, wave, precipitation and groundwater data we study drivers and triggers of 81 failures along the chalk cliffs on Germany’s largest island, Rügen. We have found that marine processes are negligible in triggering failures but...

Geothermal Reservoir Characterisation and Probability Analysis of Fractured Media at Grimsel Test Site, Switzerland

Selvican Türkdogan & Peter Achtziger
Exploitation of deep geothermal energy is considered as one of the most efficient renewable energy applications. In this sense, reservoir stimulation is established to extract geothermal energy from EGS (Enhanced Geothermal System) which is highly dependent on its in-situ structural properties: damage/shear zones, faults, fractures, its statistics and characteristics. In more detail, damage zones may behave like a conduit providing preferential pathways for fluid flow in otherwise impermeable rock such as granite or gneiss. To...

Virtual field trip to Late Jurassic Hanifa Formation of the Central Saudi Arabia

Pankaj Khanna , Ahmad Ihsan Ramdani , Teyyuba Adigozalova , Gaurav Gariola & Volker Vahrenkamp
Tuwaiq Mountain Escarpment in the Central Saudi Arabia exposes the Late Jurassic carbonates, which are one of the world’s most prolific oil-producing strata in the subsurface. The outcrops provide a window of opportunity to study the architecture of these strata that is found usually complex due to heterogeneous lateral and vertical facies. These heterogeneities are sub-seismic in scale, thus, the information from outcrops bridge the gap between seismic and core data. This virtual field trip...

Cenozoic evolution of the Icelandic Plume and its influence upon the topographic evolution of Northwest Europe

Nicky White
The Icelandic mantle plume is probably the largest convective upwelling on Earth. It is generally agreed that its growth and evolution have had a significant influence on the geologic and oceanographic evolution of both the North Atlantic Ocean and Northwest Europe during Cenozoic times. At the present day, three significant observations testify to the existence and size of this plume. First, residual depth anomalies prevail in the oceanic lithosphere surrounding Iceland. These anomalies show that...

Redox conditions during deserpentinization in western Elba Island, Italy.

Malte Kalter & Wolfgang Bach
The observation of oxidized arc melts has led to a discussion about the redox conditions during the dehydration reactions of serpentinites in subduction zones. The discussed range of oxygen fugacities (fO2) between+5 and -2 log units relatively to the QFM buffer allows sulfur to be present either as oxidized or reduced species. This work investigates the development of the fO2 with serpentines form the western part of the island Elba in Italy. We compared observations...

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...

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:...

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...

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...

Registration Year

  • 2022
    307
  • 2021
    149
  • 2020
    3

Resource Types

  • Text
    459

Affiliations

  • Karlsruhe Institute of Technology
    46
  • Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences
    34
  • Federal Institute for Geosciences and Natural Resources
    20
  • Technical University of Darmstadt
    13
  • University of Bremen
    12
  • RWTH Aachen University
    11
  • University of Tübingen
    9
  • Utrecht University
    9
  • Ludwig-Maximilians-Universität München
    8
  • GEOMAR Helmholtz Centre for Ocean Research Kiel
    7