149 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...

Southeastern Atlantic deep-sea warmth across two early Eocene transient global warming events

Tobias Agterhuis, Martin Ziegler & Lucas J. Lourens
Paleoclimate Biogeology, Earth Sciences Department, Utrecht University, The Netherlands The early Eocene (56–48 Ma) can provide important constraints on the near-future warm climate state (Zachos et al., 2008; Burke et al., 2018) because it is a greenhouse period of highly-elevated CO2 levels and the occurrence of multiple transient global warming events (hyperthermals) (e.g. Lourens et al., 2005; Sluijs et al., 2006; Bijl et al., 2009; Anagnostou et al., 2016; Cramwinckel et al., 2018; Lauretano et...

Giant growth in insular fossil dormice

Jesse James Hennekam , Roger J. Benson , Victoria L. Herridge , Nathan Jeffery , Enric Torres-Roig , Josep Antoni Alcover & Philip G. Cox
(1)Hull York Medical School, University of York, United Kingdom; (2) Department of Earth Sciences, University of Oxford, United Kingdom; (3)Natural History Museum, London, United Kingdom; (4) Department of Musculoskeletal Ageing Science, Institute of Life Course Medical Sciences, University of Liverpool, United Kingdom; (5)Departament de Dinàmica de la Terra i de l’Oceà, Facultat de Ciències de la Terra, Universitat de Barcelona, Barcelona, Spain; (6)Departament de Biodiversitat i Conservació, Institut Mediterrani d’Estudis Avançats (CSIC-UIB), Esporles, Mallorca, Spain;...

Fractures, fluids and hypogenic karsts: key features in carbonate reservoirs and aquifers

Giovanni Bertotti & Stephan de Hoop
Delft University of Technology, The Netherlands (1); Federal University of Rio Grande do Norte, Brasil (2)

Karsts have been documented in a large number of hydrocarbon reservoirs but their origin has generally been attributed to meteoric processes. In the last years, however, it has been increasingly recognized that many of them have a hypogenic origin which implies that the CO2 and/or H2S responsible for carbonate dissolution come from deep sources transport being favoured...

The closure of the Neotethys in two episodes: first. as a result of Jurassic to Early Cretaceous obduction and second, as a result of Early Palaeocene collision; a comparison of surface geology and tomography (Central Internal Hellenides, Greece)

Rudolph Scherreiks & Camille BouDagher-Fadel
This contribution concerns Neotethys palaeogeography in the Central Internal Hellenides. Neotethys oceanic crust is represented in the Vardar zone of the Hellenides by the ophiolites of the Almopias sub-zone. Contrary to numerous tectonic models in the literature, we show that the Almopias ocean closed in two episodes.

A 5.3-million-year history of monsoonal precipitation in northwestern Australia

Jan-Berend Willem Stuut , Patrick De Deckker , Mariem Saavedra-Pellitero , Franck Bassinot , Anna Joy Drury , Maureen Walczak & Kana Nagashima
NIOZ - Royal Netherlands Institute for Sea Research, and Utrecht University, Texel, the Netherlands (1); MARUM – Center for Marine Environmental Sciences, Bremen University, Bremen, Germany (2); Department of Earth Sciences, Faculty of Science, Vrije Universiteit Amsterdam, The Netherlands (3); ANU – Australian National University, Research School of Earth Sciences, Canberra, Australia (4); School of Geography, Earth and Environmental Sciences at University of Birmingham, Edgbaston Birmingham, United Kingdom (5); LSCE - Laboratoire des Sciences du...

Studying glacial/interglacial cycles from downhole logging data: an application to the ICDP drilling project Lake Junín, Peru

Simona Pierdominici, Christian Zeeden , Jochem Kück , Donald Rodbell & Marc Abbott
Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum - GFZ, Germany (1); Leibniz Institute for Applied Geophysics, Hannover, Germany (2); Union College, Schenectady, NY 12308, USA (3); Dep. Of Geology and Planetary Science, University of Pittsburg, USA (4)

Can the history of the lake records covering the glacial-interglacial cycles be reconstructed from downhole logging data without the high-resolution data derived from core analysis? To answer this question, we present a study reconstructing glacial-interglacial sediment variability and an estimate...

Mandibular morphology of Middle Pleistocene cave bears (Ursus deningeri) from Santa Isabel de Ranero-Bear sector

Anneke H. van Heteren, Mónica Villalba de Alvarado , Mikel Arlegi & Asier Gómez-Olivencia
Sektion Mammalogie, Zoologische Staatssammlung München, Germany (1); GeoBio-Center, Ludwig-Maximilians-Universität München, Germany (2); Department Biologie II, Ludwig-Maximilians-Universität München, Germany (3); Dept. Prehistoria, Historia Antigua y Arqueología, Universidad Complutense, Spain (4); Centro UCM-ISCIII de Investigación sobre Evolución y Comportamiento Humanos, Spain (5); Dept. Estratigrafía y Paleontología, Universidad del País Vasco-Euskal Herriko Unibertsitatea, Spain (6); PACEA UMR 5199, Université de Bordeaux, France (7); Sociedad de Ciencias Aranzadi, Spain (8)

The cave of Santa Isabel (301 m above...

The Utrecht Companion to the Earth: Making the Field an Even Richer Learning Environment

João P. Trabucho Alexandre, Hans de Bresser, Andrea Cuesta Cano & Yorick P. Veenma
Department of Earth Sciences, Universiteit Utrecht

The ultimate aim of field courses should be to enable students to work autonomously in the field. Student- and problem-centered approaches to learning in the field afford students much autonomy, but unlike in the more traditional show-and-tell approach, independent projects have so far required that students spend a significant amount of time working in the field without access to supervision. Unless students are competent enough to experience...

Crust and upper mantle structure of the Ligurian Sea revealed by ambient noise tomography and receiver function analysis

Felix Noah Wolf , Dietrich Lange , Heidrun Kopp , Anke Dannowski , Ingo Grevemeyer , Wayne Crawford , Martin Thorwart , Anne Paul &
GEOMAR Helmholtz Centre for Ocean Research Kiel, Germany (1); Kiel University (2); Institut de physique du globe de Paris, Paris, France (3); ISTerre - Institut des Sciences de la Terre, Grenoble, France (4); AlpArray Working Group: http://www.alparray.ethz.ch (5);

The Liguro-Provencal-basin was formed as a back-arc basin of the retreating Calabrian-Apennines subduction zone during the Oligocene and Miocene. The resulting rotation of the Corsica-Sardinia block is associated with rifting, shaping the Ligurian Sea. It...

Balancing the oceans alkalinity budget by physical weathering of carbonate rocks

Gerrit Müller, Jack Middelburg & Appy Sluijs
Department of Earth Sciences, Utrecht University, The Netherlands

Alkalinity, the excess of bases over acids, is a frequently used conservative variable in Biogeochemistry and Oceanography to calculate carbonate system parameters and estimate the oceans susceptibility to acidification. On timescales smaller than the residence time of the bicarbonate ion, the major contributor to ocean alkalinity, this budget should be at steady state, implying input and output to be balanced. Despite its importance and incorporation into...

Next step 'become a geologist'? Practical approach to senior high school education in geosciences

Andreas Nikolaus Küppers
The Potsdam Conventus, Germany

Attracting young students with high capabilities to a tertiary education in geosciences is of paramount importance for the future progress of Earth sciences and constitutes a central goal in geo-education. A set of six thematic ‘school-lab days’ has been developed aiming at senior high school students aged 14 to 18, preferably with a background of advanced courses in natural sciences, mathematics or informatics. Lab days were available in German...

Stratigraphic gaps and durations of the carbon isotope events during the Middle-Late Ordovician in Yichang, South China

Chuan Zhen Ren, Qiang Fang & Huaichun Wu
State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing, China (1); School of Ocean Sciences, China University of Geosciences, Beijing, China (2)

The Middle-Late Ordovician transition is one of the most important periods of the environmental changes and biotic turnovers throughout the earth's history. Here, we used magnetic susceptibility as the paleoclimate proxy to conduct cyclostratigraphic analysis on the Zhenjin and Puxihe sections in Yichang, South China, to understand...

Quantifying grain-contact and grain-volume stress-strain fields in simulated sandstone: a high-resolution FEM approach

Takahiro Shinohara, Cedric A.P. Thieulot & Suzanne J.T. Hangx
Department of Earth Sciences, Faculty of Geosciences, Utrecht University, Utrecht, Netherlands.

Fluid extraction from subsurface reservoir sandstones frequently results in surface subsidence and induced seismicity, such as observed in the Groningen Gas field (the Netherlands). The cause lies in reservoir compaction driven by the increase in effective overburden stress. Deformation mechanisms in sandstone include instantaneous elastic deformation, inelastic, time-independent processes, such as critical grain breakage and/or compaction of intergranular clay rims, and/or creep...

Numeric calculation of the arithmetic mean for the particle size - its advantage over the phi scale

Ludwig Biermanns
Universität Tübingen, Germany

Calculating the arithmetic mean in particle (grain) size, am, with the phi scale (Folk, 1964: 81), is quite complicated. Its calculation, therefore, should be done in the numeric, or arithmetic way, where the sizes for the percentiles are directly given: - - For the sizes, with the greatest frequencies, the values of 25; 50 and of 75 weight %, are included in the calculation. - - 5 and 95 wt. %...

A numerical sensitivity study of how permeability, porosity, geological structure, and background hydraulic gradient control the lifetime of a geothermal reservoir

Johanna Frederike Bauer , Michael Krumbholz & Elco Luijendijk
Leibniz Institute for Applied Geophysics (1); Federal Institute for Geosciences and Natural Resources, Germany (2); Georg-August-University Göttingen (3)

The utilization of geothermal energy comes with a high economic risk. Many of the parameters that control the quality of a geothermal reservoir are heterogeneously distributed and therefore difficult to predict in a rock volume. We carried out a numerical sensitivity study using a large number (1027) of 4D numerical models of a geothermal doublet. We...

Critical Raw Materials (CRM) potential of Slovenian historical mining sites

Klemen Teran
Geological survey of Slovenia, Slovenia

Of the more than 200 metal ore occurrences and deposits discovered on Slovenian territory, several have been developed into significant mines (e.g. the Idrija Hg mine or the Mežica Pb-Zn-Mo mine). After 1995, however, all metal mines in Slovenia were closed, which also led to an interruption in mining exploration. The potential of the Slovenian ore deposits to supply Critical Raw Materials (CRM) remained largely unknown, as the historical...

A Late Glacial surface rupturing earthquake at the Peel Boundary faultzone, Roer Valley Rift System, and its morhologic response by the Meuse river

Ronald Van Balen , Marcel Bakker, Kees Kasse, Jakob Wallinga & Hessel Woolderink (1)
Vrije Universiteit Amsterdam, Netherlands (1); TNO-Geological Survey of the Netherlands (2); Netherlands Centre for LuminescenceDating Soil Geography and Landscape Group, Wageningen University Research (3).

In a trench along the central part of the Peel Boundary fault zone (PBFZ), Roer Valley Rift System (RVRS), southeastern Netherlands, evidence was found for a large faulting event that occurred around 14 ka. The event caused a fault scarp in unconsolidated sediments of ~1 meter. A colluvial wedge...

Registration Year

  • 2021

Resource Types

  • Text


  • Utrecht University
  • National Laboratory of Energy and Geology
  • Instituto Geológico y Minero de España
  • Federal Institute for Geosciences and Natural Resources
  • Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences
  • TU Darmstadt
  • Netherlands Organisation for Applied Scientific Research
  • Royal Netherlands Institute for Sea Research
  • University College London
  • Norwegian Geological Survey