22 Works

Does regional geology help to assess earthquake hazard in continental interiors?

Tim Hahn, Jonas Kley, Diethelm Kaiser & Thomas Spies
Earthquake hazard assessment is crucial for different planning tasks, including the search for a German nuclear waste repository. Germany is located in an intraplate setting with a low level of seismicity and the seismically active faults are incompletely known. To solve this problem, seismotectonic regions (SR) of assumed uniform seismicity can be defined and used as a basis to define seismic area sources to be used in seismic hazard analyses. We have elaborated a new...

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,...

The effect of Co substitution and sample preparation on the Raman spectra of pyrite

Khulan Berkh & Dieter Rammlmair
Effect of Co substitution in pyrite was investigated using a Raman microprobe. Textural appearance of Co-bearing pyrite was visualized by mapping method. The revealed Raman map tightly correlates with a Co distribution map obtained by electron microprobe and µ-energy-dispersive X-ray fluorescence microscope. In addition, a strong influence on the pyrite spectra due to sample preparation was documented. The standard mechanical polishing caused highly broadened modes at upshifted frequencies, which could be avoided by analyzing of...

On the infrasound emission generated by wind turbines

Lars Ceranna , Peter Gaebler, Gernot Hartmann, Patrick Hupe, Christoph Pilger & Andreas Steinberg
Aerodynamic infrasonic signals generated by wind turbines can be detected by highly sensitive micro-barometers showing spectral peaks at the blade passing harmonics, which are above the background noise level. As infrasound is one of the four verification technologies for the compliances with the Comprehensive Nuclear-Test-Ban Treaty (CTBT), decreases in detection capability for dedicated infrasound arrays have to be avoided. Therefore, preventing such decrease is particularly important for the two German infrasound stations IS26 in the...

Unique islets in SE Asia: How Holocene climate and sea-level controlled growth of a coral reef island

Yannis Kappelmann, Hildegard Westphal, André Wizemann & Thomas Mann
Coral reef islands are unconsolidated landforms, composed of skeletal carbonate from surrounding reefs and related ecosystems. Facing the predicted rise of sea-level and a changing environment in the next decades, response of low-lying coral reef islands is of great scientific and public interest. To better estimate future behavior, it is necessary to know and classify the effects of past environmental changes on the sedimentary system. In SE Asia, sedimentological understanding of the development of these...

Groundwater resources in northern Namibia

Georg J. Houben
The transboundary Cuvelai-Etosha Basin (Namibia/ Angola) is a semi-arid region. Rising population and water demand increase the stress on already scarce water resources. The local aquifers, the perched KOH-0 and the deeper KOH-1 are of limited use, the former due to low yields and microbiological issues, the latter due to often brackish water. A previously unknown deep freshwater aquifer, KOH-2, with high yield and good water quality was discovered at the end of the 1990s....

Raw Material Potential from Historic Mine Sites

Henrike Sievers , Petr Rambousek , Monica Serra, Antje Wittenberg & Daniel Oliveira
Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), Hannover, Germany (1); Česká geologická služba, prac. Geologická 6, Praha 5–Barrandov, Czech Republic (2); ISPRA - Dipartimento per il Servizio Geologico d'Italia, Roma, Italy (3); Laboratório Nacional de Energia e Geologia, Amadora, Portugal (4)

The raw materials required by the European industry, especially metallic raw materials, are largely imported into the EU. Thus, Europe’s economic and social wellbeing relies on supplies from international sources and depends on secure...

µ-EDXRF based classification of chromites. A quick approach for testing hand specimen and drill cores.

Dieter Rammlmair & Wilhelm Nikonow
Chromites from ophiolites and layered intrusions show a wide variety in Cr#, Mg# and Cr/Fe ratios. These ratios provide information on the genesis of the chromite deposits e.g. the place of formation. By means of µ-EDXRF this information can be obtained in a very quick way from cut hand specimen. Unfortunately, chromites show a number of very intensive diffraction signals due to the polychromatic beam of the µ-EDXRF system, which even after calculating the minimum...

Geophysical borehole logging - using existing data for petrophysical and regional characterisation of claystone formations

Gesa Kuhlmann & Klaus Reinhold
BGR-Dienstbereich Berlin, Germany(1);Claystones in the deep subsurface have various barrier-effective properties for solute transport. Changes in the mineralogical composition (incl. fluids), the structure of claystones in the strict sense, as well for claystone formations in a broader sense, and their regionally different geological development cause a great variety of petrophysical, mineralogical and geochemical properties of claystone sequences. Therefore, sound knowledge of the characteristics of claystone formations is required for the different usage options of the...

Groundwater exploration and production in arid Jordan

Falk Lindenmaier , Gerhard Kapinos , Mark Gropius , Klaus Holzner , Florian Brückner , Daniel van Rooijen , Rebecca Bahls & Mathias Toll
The water providers of Jordan are constantly seeking to find new water resources to supply the public. Water table depths of up to 250 m, dry aquifers and saline waters make it increasingly difficult to successfully strike exploitable groundwater. We provided geoelectrical measurements for the exploration of a new well field area and set up a preliminary a-priori model for the interpretation of the geoelectrical results. Borehole geophysical logs, data on salinity content and subsurface...

The family of battery metals found in European seabed mineral deposits: The MINDeSEA perspective

Javier Gonzalez , Teresa Medialdea , Henrik Schiellerup , Irene Zananiri , Pedro Ferreira , Luis Somoza , Xavier Monteys , Trevor Alcorn , Egidio Marino , Ana Lobato , Thomas Kuhn , Johan Nyberg , Vitor Magalhaes , Rosario Lunar , Boris Malyuk , James Hein & Georgy Cherkashov
Covering 15,000,000 km2, the pan-European seas represent a promising new frontier for the exploration of mineral resources. The GeoERA-MINDeSEA consortium, a cooperative network of 12 Geological Surveys and Marine Institutes, is facing this exploration challenge. 688 seabed mineral occurrences are described in the MINDeSEA database, GIS cartographies and reports, containing valuable information on geology, metallogeny, critical raw materials prospectivity and mineral potential. Five types of mineral deposits are investigated, including seafloor massive sulphides, ferromanganese crusts,...

Dynamic as always – Sedimentary evolution of a coral reef island from the Spermonde Archipelago, Indonesia

Yannis Kappelmann , Hildegard Westphal , Dominik Kneer , André Wizemann & Thomas Mann
Leibniz Centre for Tropical Marine Research (ZMT), Fahrenheitstraße 6, Bremen, Germany(1);University of Bremen, Bibliothekstraße 1, Bremen, Germany(2);Bioplan GmbH, Strandstraße 32a, 18211 Ostseebad Nienhagen, Germany(3);Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), Stilleweg 2, Hannover, Germany(4);The effects of changing climate and environmental conditions on coral reef islands have received a lot of attention, and the findings are discussed broadly. The low elevation of such islands above mean sea level and the largely unconsolidated sediment is exposing them to...

Cementation rates of detrital platform carbonates and sequence stratigraphic implications

Thomas Mann & Hildegard Westphal
Different views exist on the prevalent processes that control transport and deposition of detrital platform carbonates in a sequence stratigraphic framework. While some models indicate that meteoric cementation during sea-level lowstands retards sediment transport into deeper basins, others imply marine cementation during highstands as dominant process affecting the architecture of carbonate depositional sequences. These opposing views are based on observations from the Bahamian archipelago, an isolated carbonate platform with a significantly higher carbonate saturations state...

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...

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...

FRAME and MINDeSEA: Where land meets sea in the research, prediction and prospectivity of metallic mineral critical raw materials

Daniel P. S. de Oliveira , F. Javier Gonzalez & Antje Wittenberg
(1)Laboratório Nacional de Energia e Geologia (LNEG), Portugal; (2) Instituto Geológico y Minero de España; (3) Federal Institute for Geosciences and Natural Resources;

Critical raw materials (CRM) made it back on the EU Commission’s (EC) agenda in 2008. To date three CRM lists have been published (2011, 2014, 2017) and a new list advised for 2020. Invited experts also from National Geological Surveys added their expertise to determine the lists underpinned by projects (e.g. ERECON,...

Long-term mechanical behavior of claystone

Sibylle Irene Mayr
For decades, claystone is investigated as a likely host rock material for the deep geological disposal of highly radioactive waste. To ensure safe operation, knowledge about the long-term (thermo-hydro-) mechanical behavior of clay rock is of significant relevance: How will the excavation induced differential stresses gradually dissipate while causing convergence? Laboratory triaxial tests on the mechanical behavior allow for the controlling of major and minor principal stress (differential stress), pore pressure (effective stress), saturation, temperature...

Latest Achievements with drill core scanning based on Laser Induced Breakdown Spectroscopy applied to 6 meter of drill core through Merensky Reef, Bushveld Complex, South Africa

Jeannet Meima , Dieter Rammlmair & Malte Junge
A 6-meter drill core from Merensky Reef, Bushveld Complex, South Africa, was scanned in detail with a drill core scanner based on Laser Induced Breakdown Spectroscopy. The purpose of the investigation was to visualize variations in the chemical composition along the core, and following a mineral classification of the LIBS data, of variations in the mineral chemical composition as well. The LIBS technology is based on atomic emission spectroscopy, in which the excitation of the...

Rock slope failures along the Forkastningsfjellet coastline, Svalbard: characteristics and implications for controlling and triggering factors.

Dirk Kuhn , Jewgenij Torizin , Michael Fuchs , Reginald Hermanns , Tim Redfield & Dirk Balzer
Climate warming and the related permafrost degradation are thought to influence slope stability, landscape evolution, and the natural hazard potential in polar- and high mountain regions. In this context, we investigate the coastal range of Forkastningsfjellet, Svalbard, which is affected by rock slope deformations of different magnitudes and age. Based on a detailed multidisciplinary investigation, we discuss the causes, kinematics and timing of rock slide activity. The distinct stair-stepped morphostructural relief of the Forkastningsfjellet ridge...

Why are fluid-rock reactions crucial for sustainably utilizing geotechnical potentials of the deep subsurface, and to tackle future energy challenges?

Sebastian Fischer
In recent years, the deep geological subsurface gained more and more attention as it offers various reservoirs potentially applicable for different geotechnical use options, e.g. deep geothermal energy, geological storage of CO2 and H2/energy. In this context, knowledge about the occurrence and the controlling processes of fluid-rock reactions in space and time is important to guarantee sustainable long-term reservoir utilization. While fluid-rock reactions occur at pore scale, they can significantly influence both reservoir-scale (transport) processes...

Mass movements in Germany - contributions to the landslide susceptibility modeling

Dirk Balzer , Michael Fuchs , Dirk Kuhn & Jewgenij Torizin
The presentation provides an overview about the project “Mass Movements in Germany (MBiD)” jointly implemented by six State Geological Surveys and the Federal Institute for Geosciences and Natural Resources in the period from 2018 to 2020. The objective pursued in this intervention was to review the practical feasibility of the spatial assessment (modeling) of the landslide susceptibility in Germany both at regional and nationwide level. The chosen approach took into consideration the specific framework conditions...

Shallow-marine carbonate cementation in Holocene segments of the calcifying green alga Halimeda

Thomas Mann , André Wizemann , Marleen Stuhr , Yannis Kappelamann , Alexander Janßen , Jamaluddin Jompa & Hildegard Westphal
Early-diagenetic cementation of tropical carbonates results from the combination of numerous physico-chemical and biological processes. In the marine phreatic environment it represents an essential mechanism for the development and stabilization of carbonate platforms. However, many early-diagenetic cements that developed in the marine phreatic environment are likely to become obliterated during later stages of meteoric or burial diagenesis. In this contribution, a petrographic microfacies analysis of Holocene Halimeda segments collected on a coral island in the...

Registration Year

  • 2022
  • 2021

Resource Types

  • Text


  • Federal Institute for Geosciences and Natural Resources
  • National Laboratory of Energy and Geology
  • Leibniz Centre for Tropical Marine Research
  • Norwegian Geological Survey
  • Instituto Geológico y Minero de España
  • University of Bremen
  • //ror.org/019w00969:Leibniz-Zentrum für Marine Tropenforschung (ZMT), Bremen, Germany
  • Hasanuddin University
  • Interuniversity Institute for Marine Sciences in Eilat
  • Leibniz Centre for Tropical Marine Research (ZMT)