361 Works

Assessing the potential impact of fractures on heat extraction from tight Triassic reservoirs in the West Netherlands Basin

Quinten Diede Boersma , Pierre Olivier Bruna , Stephan de Hoop , Francesco Vinci, Ali Moradi Tehrani & Giovanni Bertotti
Delft University of Technology, The Netherlands (1); PanTerra Geoconsultans (2); CGG The Hague (3)

Heat production from low permeability reservoirs is believed to be significantly aided by the presence of open natural fractures (e.g. Upper Rhine Graben). However, in hot sedimentary aquifer studies these structural features are rarely included when estimating their economic viability. Therefore, we present a case study which assesses the impact of natural fractures on heat extraction from the tight Main...

Digital fieldtrip into the Vulkaneifel Unesco Global Geopark (Germany)

Sabine Kummer, Andreas Schüller & Gösta Hoffmann
Bonn University, Germany (1); RWTH Aachen University, Germany (2); Natur und Geopark Vulkaneifel, Germany (3)

This virtual fieldtrip will lead the participants into the geopark „Vulkaneifel“. The aim of the fieldtrip is a) to introduce the geopark; b) to highlight the abilities of the smartphone app OutcropWizard and c) to show the most spectacular landforms and outcrops within the geopark. The UNESCO global geopark „Vulkaneifel“ is located in western Germany. The Eifel mountains...

New insights in the Late Pliocene and Early Pleistocene vegetation and climate stratigraphy of NW Europe

Timme Henrik Donders, Alexander Houben, Cohen Kim , Ding Hao, Krom Lisanne, Busschers Freek, Dearing Crampton-Flood Emily, Verreussel Roel & Peterse Francien
Faculty of Geosciences, Utrecht University, The Netherlands (1); Geological Survey of the Netherlands, Utrecht, The Netherlands (2); The University of Manchester, Manchester, UK (3)

The chronostratigraphy and climate record of the Late Pliocene and Early Pleistocene in Northwest Europe was spurred by pioneering work in the 1960’s by Waldo Zagwijn. This period is particularly important because of the inception of ice sheets in the Northern Hemisphere. However, the classic stratigraphic framework based on...

Parameters for the design of HDD installed power cables in soil and rock

Ingo Sass, Maximilian Eckhardt & Markus Schedel
Technical University of Darmstadt, Geothermal Science and Technology, Darmstadt, Germany (1); Darmstadt Graduate School of Excellence Energy Science and Engineering, Darmstadt, Germany (2).

When operating buried power cables, the mechanical and thermal properties of the cable bedding need to meet certain requirements. On the one hand, positioning and protection of the cable and protection pipe from mechanical stress demand mechanical stability. On the other hand, electric losses during transmission result in thermal energy...


Meije Sibbel, Ernst Willingshofer, Meije Sibbel, Richard Wessels & Oliver Plümper
Faculty of Geosciences, Utrecht University, The Netherlands

In this virtual fieldtrip we will review and discuss three case studies carried out at Utrecht University utilizing virtual reality (VR) and virtual field observations (VFO) across a range of scales for the study of geologic features such as fold and fault or shear zone structures. At the laboratory scale, state-of the art Virtual Reality (VR) provides an unprecedented level of detail for the observation of the...

Raw materials - you can’t do well without them

Antje Wittenberg, Daniel P. S. de Oliveira , Lisbeth Flindt Jorgensen , F. Javier Gonzalez, Henrike Sievers, Lídia Quental , Aurete Pereira , Tom Heldal & David Whitehead
Federal Institute for Geosciences and Natural Resources (BGR), Germany (1); National Laboratory of Energy and Geology (LNEG), Portugal (2); Geological Survey of Denmark and Greenland (GEUS), Denmark (3); Geological Survey of Spain (IGME), Spain (4); Geological Survey of Norway (NGU), Norway (5)

“Raw materials, you can’t do well without them”. This statement echoes the needs for a reliable raw materials supply chain. Awareness of raw materials is an essential element for the manufacturing industry,...

Astronomically forced sphalerite growth and groundwater circulation in the Upper Mississippi Valley District, USA

Mingsong Li & Hubert Barnes
Pennsylvania State University, United States of America

Groundwater plays an essential role in global water cycles via feedback between groundwater and climate systems. However, the geologic history of groundwater activity remains unclear due to limited data. Sphalerite color banding in the Upper Mississippi Valley District (USA) is apparently caused by variation in oxidation state during sulfide precipitation which is controlled by the penetration of deeply circulating groundwater. Here, time series analysis of the...

Reconstruction of high-resolution lake level and its astronomical forcing during the Paleogene

Meng Wang & Mingsong Li (2)
School of Earth Resources, China University of Geosciences, Wuhan, China (1); Department of Geosciences, Pennsylvania State University, USA (2)

Challenges in continental sequence stratigraphy and typically limited resolution in geochronology hinder the understanding of paleolake evolution and hydrocarbon exploration in terrestrial basins. The Dongpu Depression in North China is a lacustrine basin with abundant hydrocarbon resources. An accurate geochronology for the Paleogene stratigraphy in the Dongpu Depression is lacking, and the mechanism of...

The potential of detrital garnet in UHP research as exemplified by the central Saxonian Erzgebirge

Jan Schönig, Guido Meinhold & Keno Lünsdorf
Georg-August-University Göttingen, Geosciences Center, Germany (1); Keele University, School of Geography, Geology and the Environment, UK (2) Understanding the occurrence, extent, and lithological variability of UHP metamorphic domains is fundamental to plate tectonics and its evolution through geologic time. In the central Saxonian Erzgebirge (Germany), the highest metamorphic conditions are recorded in the “Gneiss-Eclogite Unit”, a heterogeneous nappe comprising MP to UHP rocks. Although extensively investigated, UHP rocks were only locally confirmed by the occurrence...

Dislocation creep flow laws of wet quartzite: the significance of pressure and slip systems

Lucy Lu & Dazhi Jiang
Western University, Canada (1); State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an, China (2) An accurate flow law for dislocation creep of quartzite is critical for the understanding of continental rheology and geodynamic models. Despite many years of effort, existing creep experiments have yielded very different quartz flow law parameters. We demonstrate that the difference can be explained by considering the pressure effect on the activation enthalpy and the slip system...

Mineralogical characterization of podiform chromitite deposit in the Eastern Mirdita Ophiolite, Albania

Malte Junge, Ann-Christin Kolb, Antje Wittenberg , Henrike Sievers, Dashamir Gega & Kujitim Onuzi
Mineralogical State Collection Munich (SNSB), Germany (1); Institute of Earth and Environmental Sciences, University Freiburg, Germany (2); Federal Institute for Geosciences and Natural Resources (BGR), Germany (3); Albanian Geological Survey – AGS, Albania (4); Institute of Geosciences, Energy, Water and Environment, Tirana, Albania (5)

The Mirdita ophiolite in Albania is part of an ophiolite belt occurring between the Apulian and Pelagonian subcontinents in the Balkan Peninsula. Within the Eastern Mirdita Ophiolite major chromite deposits...

A multiscale numerical modelling investigation of quartz CPO variation due to flow partitioning

Ankit Bhandari & Dazhi Jiang
University of Western Ontario, Canada

Quartz crystallographic preferred orientations (CPOs) in natural mylonites can vary to such an extent that they apparently give opposite senses of shear within a single thin section. Many qualitative explanations have been proposed. Here, we take a multiscale numerical approach to investigate the variation of quartz CPOs resulting from flow partitioning in a ductile shear zone environment. We couple our self-consistent Eshelby formalism for power-law viscous composite materials...

How scarce is our water? An analysis of the present and future world water situation

Randolf Rausch
Technische Universität Darmstadt, Germany

If you look at the media, you come across new horror stories about water almost every day. Experts warn of a life-threatening global water crisis. Reports of droughts, wars for water, poisoned water and the end of our water resources are fuelling fears to die of thirst or of running out of water. How realistic is this news? Is this the truth or is this information the typical hype...


Shrawani Shagun Jha
Mody University of Science and Technology, India

Geological hazards or Geohazards, natural or human-induced disruptions of the earth surface that may trigger landslides, sinkholes, or earthquakes, present serious threats to communities, cost extensive damage to infrastructure and can bring traffic and services to a standstill. Recent climatic changes have increased the intensity of rainfall and raised mean temperature, increasing hydrological hazards, such as debris or earth flows, erosion, and floods. India has 2%...

Earth science education: How to narrow the gap between Earth science education potential and its low profile in schools?

Nir Orion & Clara Vasconcelos
Weizmann Institute of Science, Israel (1); Porto University, Portugal (2);

During the past 30 years, Earth science education (ESE) research has established a solid theoretical foundation, as well as practical strategies and techniques, for meaningful teaching of Earth science from K-12. From articles focusing on inquiry-based teaching to research in environmental education and sustainable development, a holistic view of planet Earth has been promoted. Nevertheless, the quality of this research, and the growing...

Reducing exhumation uncertainties in basin modelling: Source rock maturation history of the Southern Chotts Basin, Central Tunisia

Jos Kwakman, Pierre-Olivier Bruna & Giovanni Bertotti
Department of Geoscience and Engineering, Delft University of Technology, Delft, The Netherlands

The primary reservoirs present in the Southern Chotts Basin, Central Tunisia, are located within Triassic-, Permian- and Ordovician units. They are mainly sourced by the Silurian - Lower Devonian Fegaguira Fm. and its Hot Shale member. The Hercynian Orogeny has reworked the Palaeozoic package, removing the Devonian - Carboniferous and most of the Permian deposits in the Southern Chotts Basin. This...

The European continental crust through detrital zircons from modern rivers: biasing effects in the detrital zircon record

Paula Castillo , Heinrich Bahlburg , Rodrigo Fernández , Mark Fanning & Jasper Berndt
We present U-Pb, Lu-Hf, and O isotopic data, as well as size-shape data for approximately 3700 detrital zircons from 15 European rivers. In combination with geomorphological information for each river basin (area, drainage length, and hypsometric curves), we evaluate the representativeness and biases affecting such datasets. The new data allow us to demonstrate that the detrital zircon record from major rivers represents all relevant geological events in Europe at the continental scale, with detrital zircon...

Crystallisation sequence of a REE-rich carbonate melt: an experimental approach

Valentin Mollé , Fabrice Gaillard, Zineb Nabyl , Johann Tuduri , Ida Di Carlo & Saskia Erdmann
Carbonatites host the main REE deposits in the world, with bastnaesite being the main REE-bearing mineral of interest. However, the nature of the enrichment process, magmatic vs hydrothermal, is still debated. This study aims to experimentally determine the behaviour of REE elements during carbonatite crystallisation, and if bastnaesite can be directly crystallised from a carbonate melt. Crystallisation experiments have been done from 900 to 600°C at 1 kbar on a REE-rich calciocarbonatitic composition. Calcite (Ca,REE)CO3...

Spatial and temporal patterns of rare earth elements in the seaweed Saccarina latissima along the Norwegian coast

Stefania Piarulli , Tomasz Ciesielski , Silje Forbord , Achilleas Zevros , Bjørn Henrik Hansen , Bjørn Munro Jenssen & Julia Farkas
Rising rare earth elements (comprising the 15 lanthanoids plus yttrium (REY)) processing and use can lead to increased anthropogenic REY release into the environment, representing a potential environmental concern. Seaweeds due to their key ecological role as primary producers, habitat forming organisms and their tendency to accumulate metals have been largely used for monitoring anthropogenic pollution in coastal areas. In this study we assessed REY contents in Saccarina latissima seaweed to identify potential anthropogenic REY...

Modelling with the Geowindow

Dominik Conrad , Tom Klaus , Gregor C. Falk & Matthias Faller
The Geowindow offers an infrastructure to create analog models in geographic contexts, it is a “test tube” for visualization; not only of static images but also to display processes in the Earth system. Thus, it is an interactive teaching and learning device for all Earth Sciences. Due to their enormous temporal and spatial dimensions, most of the complex structures and processes in the context of the earth´s systems and cycles cannot be observed directly. In...

The Australian AuScope Virtual Research Environments (AVRE): a Flexible, Service-Oriented Geoscience Platform to Empower Researchers for the Global Challenges of Today and Those of the Future

Jens Klump , Tim Rawling , Carsten Friedrich , Ulrich Engelke , Vincent Fazio & Lesley Wyborn
AuScope is Australia’s National Geoscience Research Infrastructure Program and seeks to provide a world-class research physical and digital infrastructure to help tackle Australia's key geoscience challenges. Launched in 2007, AuScope’s data-generating infrastructures range from VLBI telescopes to geochemistry/geochronology laboratories and geophysical data acquisitions. To utilise data collected by these infrastructures and equivalents elsewhere, the Australian Geoscience Research and Government communities have collaborated on building a suite of data portals, tools, software and virtual laboratories that...

An archive of many hats: speleothems for coupled climate and ecosystem reconstructions

Franziska Anna Lechleitner
Speleothems are secondary cave carbonate deposits and an established terrestrial paleoclimate archive. Moreover, they have the potential to record conditions in the ecosystem overlying the cave, particularly the vegetation and soil. Coupled records of paleoclimate and -ecological information from a single speleothem would be an invaluable source of information to understand the past and future sensitivity of terrestrial ecosystems to climate change, particularly under the lens of anthropogenic forcing. In order to develop proxies that...

Characterization of pore space in sandstone using the anisotropy of magnetic susceptibility

Julius Schenk , Agnes Kontny , Benjamin Busch , Ilner Khasanov & Hagen Steger
The pore space in siliciclastic rocks is one of the most important petrophysical properties in reservoir rock characterization. Of particular interest is the 3D distribution of pore space and permeability for the purpose of reservoir model development. We used a magnetic technique to determine the preferred orientation of the pore space. The approach is based on the injection of a magnetic ferrofluid, which is a stable colloidal suspension of approx. 10 nm-sized magnetite particles, into...

China’s future as a low carbon economy: The Chinese hard coal industry & renewable energies in perspective

Julia Tiganj
With the recently announced climate neutrality for the year 2060, there are plenty of questions in China about the future and the existence of the hard coal mining industry. With an annual production of 4 billion tons of hard coal, China remains the biggest producer of this resource. The consequences for the environment are tremendous. Climate neutrality poses new challenges for this country with its abundance of resources: hard coal is still the easiest and...

Carbonatites do not exist in vacuum: carbonatite–rock interactions from experiment and nature, and implications for REE mineralisation

Michael Anenburg
The igneous nature of carbonatites has been controversial for decades until experimental work in the 1960s and 1970s conclusively showed that carbonatite melts can exist in geologically reasonable conditions. The observation of natrocarbonatite eruptions at Ol Doinyo Lengai further confirmed their igneous nature. However, these lines of evidence for igneous carbonatites have been a red herring: many ideas, processes, and terms deriving from silicate magma systems were inaccurately projected into carbonatite systems. Instead, carbonatites should...

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  • 2022
  • 2021
  • 2020

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  • Karlsruhe Institute of Technology
  • Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences
  • Federal Institute for Geosciences and Natural Resources
  • University of Bremen
  • RWTH Aachen University
  • Technical University of Darmstadt
  • University of Strasbourg
  • TU Darmstadt
  • Australian National University
  • Utrecht University