459 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...

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,...

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...

Millennial variability, hydrological and limnological changes during MIS3-2 in Lake Petén Itzá, Guatemala

Rodrigo Martinez-Abarca, Michelle Abstein , Philipp Hoelzmann , Thorsten Bauersachs , Liseth Pérez , Mona Stockhecke , Sergio Cohuo Duran & Antje Schwalb
Heinrich Stadials and Greenland Interstadials are abrupt climate variations that are observed in the Northern Hemisphere throughout Marine Isotopic Stages (MIS) 3-2. Lake Petén Itzá, northern Guatemala, is a key site for paleoclimate investigations due to its sensitivity to changes in climate forcing such as the Intertropical Convergence Zone (ITCZ) and the Atlantic Meridional Overturning Circulation (AMOC). In this study, we reconstructed the hydrology and limnology of Lake Petén Itzá during MIS3-2 based on geochemical...

Paleoclimate reconstruction using Pleistocene paleosols along the middle Atbara River in Eastern Sudan

M. Mohammednoor, Robert Bussert , S. Tsukamoto , M. Richter , O. El Bedri , B. Kraatz , K. Salih , J. Müller , A. Eisawi & F. Bibi
Along the middle Atbara River, Pleistocene alluvial sediments dated to ~200 to 20 ka are exposed in eastern Sudan over a length of about 200 km with a maximum thickness of 50 m. The Atbara River today has its headwaters in the northern Ethiopian Plateau and is the last major tributary of the Nile before it flows through the Sahara. Previous studies and our fieldwork since 2018 have resulted in extensive finds of fossil terrestrial...

Deposition of Subglacial Lake Sediments underneath the Laurentide Ice Sheet? – Sediment Cores from Lake Melville, Canada, provide first Evidence

Sophie Kowalski, Christian Ohlendorf, Jens Matthiessen & Andrea Catalina Gebhardt
Lake Melville is a fjord-type lake located in Labrador, Eastern Canada, as part of the Hamilton Inlet System. It is significantly characterised by its eastern connection to the Labrador Sea through a shallow sill at the entrance to the Rigolet Narrows. In contrast, the western part of the lake receives freshwater input from several major rivers. Previous studies assumed that Lake Melville was fully excavated by the Laurentide Ice Sheet (LIS) during the last glacial....

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...

Carbonate microfacies and transgressive-regressive cycles of Oxfordian shallow-water limestones (Korallenoolith, Lower Saxony Basin)

Deyan Zhang , Stefan Huck & Ulrich Heimhofer
During the Oxfordian stage, the Lower Saxony Basin (LSB) was covered by a shallow epicontinental sea (Ziegler 1990), in which a thick succession of marine limestones and marls was deposited. Unfortunately, the scarcity of open marine marker fossils and numerous sedimentary gaps make it diffcult to correlate strata from the LSB with Oxfordian deposits elsewhere in the world (Betzler et al. 2007; Zuo et al. 2017). In a first step, this study therefore aims at...

Levelized costs and economic impacts of geothermal district heating networks: a decision tree analysis

Astu Sam Pratiwi & Evelina Trutnevyte
Geothermal district heating networks are among the key options to decarbonize the heating sector in the State of Geneva in Switzerland. But the development of geothermal district heating requires high capital costs and involves risk of not finding sufficient geothermal resources, which make these systems less competitive. On the other hand, building geothermal district heating creates a wider impact on the economy, domestically and overall. But such impact has rarely been evaluated. Our study aims...

Parametric optimization and comparative study of an organic Rankine cycle power plant for two-phase geothermal sources

Chaofan Chen , Francesco Witte , Ilja Tuschy , Olaf Kolditz & Haibing Shao
For two-phase geothermal resource, Organic Rankine Cycle (ORC) based binary plant is often applied for power production. In this work, a network topology was built with the Thermal Engineering Systems in Python (TESPy) software to simulate the stationary operation of the ORC plant. With this topology, the performance of nine different working fluids are compared. From the thermodynamic perspective, the gross and net power output is optimized respectively. Results show that R600 has the highest...

Geothermal potential and opportunities in Vietnam

Viet Cao
Located between the Pacific Ring of Fire and Alpide Belt, Vietnam possesses significant potential geothermal resources, with more than 300 hot spring sites with temperatures from 40oC to 100oC have been detected in the territory. Based on available data, Vietnam is estimated to have a geothermal potential of up to 400 MW power generation. A pilot 25MW power plant was constructed in 2013 in Đakrông - Quảng Tri Province, central of Vietnam. From geothermal measurements...

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...

Simulation of flow through a single fracture calibrated with air permeameter measurements

Marco Fuchs , Sina Hale , Gabriel C. Rau , Kathrin Menberg & Philipp Blum
Determining fluid flow through natural fractures is an important task in many geoscience-related fields, such as geothermics. In order to estimate crucial parameters of single fractures controlling the flow and flow distribution, for example hydraulic apertures, hydro-mechanical numerical models have been established in recent years in addition to experimental methods. Although models enable a greater variety of analyses, they still require time-consuming processing before and after the simulation. This study presents a novel workflow for...

Seismic Monitoring of DeepStor: Using low-cost sensors for ambient noise correlation methods and Citizen Science

Johannes Käufl , Eva Schill & Thomas Kohl
DeepStor is an experimental facility with the goal to investigate High Temperature Aquifer Thermal Energy Storage (HT-ATES) systems at KIT Campus North. The operational seismic monitoring of DeepStor includes a network of five broadband and one borehole seismometer. In addition, we plan to install a scientific monitoring network with low-cost seismometers (such as the Raspberry Shake and the Quakesaver Hidra) to test innovative monitoring methods and for a Citizen Science project. Ambient noise tomography and...

CDGP- a gateway to geothermal data in Alsace

Marc Schaming , Mathieu Turlure , Marc Grunberg & Jean Schmittbuhl
The CDGP [https://cdgp.u-strasbg.fr], Data Center for Deep Geothermal Energy, was created in 2016 by the LabEx G-Eau-Thermie Profonde (continuing now in ITI GeoT) [https://geot.unistra.fr/], to archive the high-quality data collected in the Upper Rhine Graben geothermal sites and to distribute them to the scientific community for R activities, taking Intellectual Property Rights into account. It manages seismological (catalogues, waveforms, focal mechanisms), seismic, hydraulic, geological, and other data related to anthropogenic hazard from different phases of...

Exploration of the geologic and hydrogeologic conditions for a medium deep borehole high-temperature thermal energy storage system at TU Darmstadt, Germany

Lukas Seib , Bastian Welsch , Matthis Frey , Claire Bossennec , Kristian Bär & Ingo Sass
Solutions for seasonal energy storage systems are an essential component for the reliable use of fluctuating renewable energy sources and to bridge the gap between abundant heat availability from renewable sources in summer and an increased heat demand in winter. As a part of the research project ’solar crystalline borehole thermal energy storage system‘ – ‘SKEWS’, a field-scale demonstrator for a medium deep borehole thermal energy storage (BTES) system with a maximum depth of 750...

Gravity survey in delineating geologic features of interest for deep geothermal use at Campus North of KIT.

Maximiliano Pavez , Natalia Cornejo , Florian Bauer & Eva Schill
The seasonal mismatch of the thermal energy demand can be addressed by thermal energy storage systems of high capacity (e.g. Lee 2013). In this scenario, High-temperatures aquifer thermal energy storage systems (HT-ATES), which commonly supply domestic needs could expand to meet heating or industrial processes demands by storing excess heat. DeepStor is a planned scientific infrastructure that address the demonstration the concept of HT-ATES in former hydrocarbon reservoirs of deep sedimentary rocks. Specifically, the concept...

Large hydraulic diffusivity of a single fault

Qinglin Deng , Guido Blöcher , Jean Schmittbuhl & Mauro Cacace
We provided an approach to estimate hydraulic diffusivity of a single fault by solving the linear diffusion equation in a partly open rough fracture under drained conditions when applying small pressure drop fluctuations (10^-5 Pa) along the fault. In contrast to the traditional calculation for the fracture hydraulic diffusivity using parameters such as hydraulic aperture, fluid compressibility, fluid viscosity, we here directly used time-dependent pressure profile p(x, y, t) to match the analytical solution for...

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