The region of Geyer in the Ore Mountains (Erzgebirge) of Germany, situated approximately 110 kilometres south of Leipzig, has a long history of ore mining. The region is known for its deposits of tin, zinc, tungsten, molybdenum, copper, iron, silver, and indium. Due to this long history and known reservoir potential, this area was selected as a test site for the Innovative, Non-invasive and Fully Acceptable Exploration Technologies (INFACT) project. INFACT is a EU funded project aiming to foster new and innovative non-invasive methods for the exploration of new mineral deposits and is coordinated by the Helmholtz Institute Freiberg for Resource Technology (HIF) at Helmholtz-Zentrum Dresden-Rossendorf (HZDR). Within the framework of this project, the GFZ - German Research Centre for Geosciences, Potsdam, Germany, acquired magnetotelluric (MT) and radiomagnetotelluric (RMT) data near Geyer. The main objectives of these measurements were to map the shallow subsurface for mineral deposits and to evaluate the potential of these methods in densely populated areas with high levels of anthropogenic noise. This data publication (10.5880/GIPP-MT.201933.1) encompasses a detailed report in pdf format with a description of the project, information on the experimental setup, data collection, instrumentation used, recording configuration and data quality. The folder structure and content of the data repository are described in detail in Ritter et al. (2019). Time-series data are provided in EMERALD format (Ritter et al., 2015).
New magnetotelluric (MT) data were collected in the Spremberg area (Brandeburg, eastern Germany) at 22 sites along 2 perpendicular profiles. All sites were equipped with five-component broad-band MT stations recording three magnetic field components and two horizontal electric field components. The main objective of the study was to assess the utility of MT techniques for mineral exploration at depth in sedimentary basins and for a region which is affected by strong electromagnetic noise from various sources. In particular, we aim to quantify the electrical conductivity distribution of the top 0.1–5 km of the Earth’s crust to determine electrically conductive zones and their possible correlation with sulfide mineralization. <default:br/> Interestingly, the MT data were recorded during a series of very powerful geomagnetic storms (Kp index 5-9). During the storms (from 10-13 May 2024), the quality of the derived MT transfer functions was generally much higher than for the geomagnetically quiet periods.<default:br/> This data publication (10.5880/GIPP-MT.202403.1) encompasses a detailed report in pdf format with a description of the project, information on the experimental setup, data collection, instrumentation used, recording configuration and data quality. The folder structure and content of the data repository are described in detail in Ritter et al. (2019). Time-series data are provided in EMERALD format (Ritter et al., 2015).
Multidisziplinäre Untersuchungen am Standort ermöglichen es uns, die Lage und Struktur des Reservoirs sowie die ablaufenden Prozesse zu identifizieren. Über den Aufbau eines integrierten Standortmodells kann beispielshaft die Entstehung eines geothermischen Reservoirs in Chile nachempfunden werden. So kann einen fundamentalen Beitrag zur zukünftigen Exploration weiterer geoth. Reservoire in Chile geleistet werden. Darüber hinaus liefert der Wissenstransfer aus in Chile gewonnenen Erkenntnissen besonders auf dem Gebiet der Magnetotellurik und Thermalwasserchemie das Prozessverständnis in dt. Geothermiesystemen zu verstehen. Geophysik: Die gravimetrische Messkampagne ist für den Zeitraum November/Dezember 2014 angesetzt. Die eigentlichen Messungen werden 4 Wochen benötigen. Darüber hinaus wird eine Vorbereitungszeit von 2 Wochen benötigt. Im Anschluss an die Messkampagne müssen die Daten über einen Zeitraum von mehreren Monaten bearbeitet und interpretiert werden. Geochemie: Erste Vorversuche zur hydrothermalen Alteration wurden schon im Vorfeld des Projektes begonnen, sodass die 2-3 monatigen Autoklav Versuche gleich mit Projektstart im August begonnen werden können. Die analytische und numerische Aufbereitung der geochemischen Versuche erfolgt im Zeitraum November - Juni '15. Kombination: Nachdem die Einzeldaten aus Geochemie, Geologie und Geophysik aufgenommen, prozessiert und interpretiert sind, wird im Sommer 2015 begonnen das geologische und numerische 3D Modell zu erstellen.
Das Verbundprojekt 'GeoEnergie (GeoEn)' wurde im Rahmen des BMBF Programms 'Spitzenforschung und Innovation in den Neuen Ländern' nach länderinternen Wettbewerben am 5. Mai 2008 für eine Förderung ausgewählt. Es stehen drei Kernthemen im Mittelpunkt der Untersuchungen: (1) Kohlendioxid-Verfahrenskette, (2) Shale Gas (unkonventionelle Georessourcen) und (3) Geothermie. Die zweite Phase des Verbundprojektes startete im Januar 2010 mit den folgenden Forschungsarbeiten. Die Laboruntersuchungen organisch-reicher Tone vom Nordrand des Rheinischen Schiefergebirges werden fortgesetzt. Im Zuge der geplanten Arbeiten soll das Shale-Gas Potential bewertet und Empfehlungen zur umweltschonenden Shale-Gas Förderung ausgearbeitet werden. Im Arbeitspaket 'Regionalthermische Exploration' wird die systematische Bestimmung thermischer Parameter der bis mehrere Kilometer mächtigen Schichtenfolge des Norddeutschen Beckens zum Abschluss gebracht. Es sollen weitere Messungen zur Wärmeleitfähigkeit ganzer Bohrprofile durchgeführt werden, um die Modellierung zur Kartierung von Temperaturzuständen in Norddeutschland weiter zu führen. In der zweiten Förderphase stehen weiterhin die Prozesse der Kohlendioxidabscheidung und des Kohlendioxidtransports im Fokus der Forschungen. Techniken, Verfahren und Prozessmodellierungen insbesondere im Bereich des Sauerstoff/Kohlendioxid Verbrennungsprozesses (Oxyfuel-Prozess) sollen weiterentwickelt werden. In der ersten Phase wurde das Kohlendioxid-Labor an der BTU Cottbus aufgebaut und Versuche in großem Maßstab durchgeführt. Die Messstrecke soll in der zweiten Phase insbesondere am Oxyfuel-Verbrennungsversuchsstand erweitert werden, um die Energieeffizienz von Oxyfuel-Brennkammern zu quantifizieren und zu simulieren. Ein weiterer wesentlicher Prozess, der im Kohlendioxid-Labor untersucht werden soll, ist die Umwandlung von Kohlendioxid mittels neuartiger Katalysatormaterialien zu Methan- und Methanol. In der zweiten Förderphase der Universität Potsdam wird die Auswertung der Bohrlochdaten fortgesetzt mit dem Ziel, die 3D Sedimentfüllungsmodellierung für das Zentraleuropäische Beckensystem zum Abschluss zu bringen. Im Bereich Geomikrobiologie werden in der zweiten Phase die Wechselwirkungen zwischen Mikroorganismen, Fluid und Gestein untersucht. In enger Zusammenarbeit mit den Projektpartnern wird untersucht, inwieweit die Umlagerungsvorgänge von Mineralen durch mikrobielle Stoffwechselvorgänge beeinflusst werden. Die Universität Potsdam ist weiterhin federführend bei dem Ausbau der Masterstudiengänge 'Geoenergie' und 'Geomikrobiologie'. Während der ersten Phase des Projektes wurde an der Universität Potsdam die Infrastruktur für die neue Fachrichtung Geomikrobiologie aufgebaut, so dass in der zweiten Phase die Nachwuchsgruppe weiter aufgebaut und eingearbeitet werden kann.
Das Verbundprojekt Brine ist ein wissenschaftliches Begleitprogramm zu den geplanten Erkundungsmaßnahmen für die projektierte CO2-Speicherung in salinaren Aquiferen Ostbrandenburgs (Beeskow-Birkholz und Neutrebbin). Die Projektziele sind die Entwicklung eines integrierten Frühwarnsystems zur Erkennung einer Salzwassermigration in süßwasserführende Aquifere und die Untersuchung von Techniken zur Druckentlastung in der CO2-Speicherformation bei gleichzeitiger geothermischer Nutzung der salinaren Wässern. An dem Verbund sind das Helmholtz-Zentrum Potsdam - Deutsches GeoForschungsZentrum (GFZ) und die Brandenburgisch Technische Universität Cottbus (BTU) beteiligt. Das GFZ Potsdam ist für die Entwicklung eines strukturgeologischen Modells zuständig. Im Rahmen des Reservoir Managements sind Untersuchungen zur optimierten Druckhaltung im CO2-Speicherhorizont und zum geothermischen Potential geplant. Weiterhin wird das GFZ Potsdam mit Hilfe numerischer Simulationen der Salzwassermigration die Möglichkeit einer Grundwasserversalzung bewerten. Durch kombinierten Einsatz von Magnetotellurik und Widerstandstomographie soll die Leitfähigkeitsverteilung des Untergrundes erfasst und die Eignung dieser Methoden für das geplante Frühwarnsystem geprüft werden.
Magnetotellurics (MT) is a passive geophysical method which uses natural variations of electromagnetic fields generated by global lightning discharges and ionospheric current systems. Since it is impossible to control these source fields, signal-to-noise ratios can be poor, particularly in presence of cultural electromagnetic noise such as power lines, railways, anti-corrosion currents in gas pipelines, etc. The Remote Reference (RR) technique is an effective way to improve magnetotelluric data quality by referencing the locally recorded electromagnetic fields to simultaneously collected, undisturbed fields at a remote reference site. Finding and maintaining such a reference site during a field campaign is expensive and time consuming. The permanent reference site in Wittstock is operated by the Geo-Electromagnetics working group of the GFZ within the framework of the Geophysical Instrument Pool Potsdam and offers high quality magnetic field recordings for RR processing free of charge for the EM community.A permanent magnetotelluric (MT) remote reference station is located in an urban forest near the city of Wittstock, in north-eastern Germany (Eydam and Muñoz, 2011). It is equipped with two S.P.A.M. Mk IV data loggers and three sets of magnetometers working in different frequency ranges. The highest frequency data is recorded using Metronix MFS07 induction coils with a sampling frequency of 6.25 kHz. The high frequency data is recorded in quasi-continuous segments, with intervals of data being collected for 10 minutes at every hour. The intermediate, broad band magnetic field data are recorded continuously using Metronix MFS06 induction coils at 250 Hz sampling frequency. Finally, long period data is recorded using a 3-component Geomagnet Fluxgate magnetometer with 5 Hz sampling rate. For completeness, electric fields are also recorded continuously at the highest frequency.The data are organized and available as daily folders. Data files are in EMERALD format (Ritter et al., 1998), which is also described in this document. We also provide computer code and example data demonstrating how to read these data files. The tools are provided as FORTRAN, C and C++ source codes and MATLAB scripts.
To meet the objectives of the European Green Deal, Europe requires an increase in the supply of raw materials. To extract these materials responsibly and sustainably the complex social, environmental and technical challenges and how they interact need to be understood. The EU funded project VECTOR aims to assess these challenges and integrate them to produce human centred solutions. In this framework, minimally disruptive geological and geophysical studies have been carried out at three different locations across Europe. Stonepark is one of these locations located in the Irish Midlands in the Limerick Basin. The area includes potentially economic ore pods within Carboniferous carbonates and volcanic rocks. In Stonepark, new MT data were collected at a total of 108 sites in an area of 1.2 km x 5 km, of which 33 sites were equipped with five-component broad-band MT stations in concert with 75 two-component stations recording only the electric fields. The novel experimental layout using mobile electric field only stations sped up fieldwork while still allowing the use of local and remote reference techniques. Major goal of the study is to assess the utility MT techniques for mineral exploration at depth in sedimentary basins. In particular, we aim to quantify the 3D electrical conductivity distribution of the top 1–5 km of the crust from new MT data, in order to determine the location of electrically conductive ore mineralization. This data publication (https://doi.org/10.5880/GIPP-MT.202223.1) encompasses a detailed report in pdf format with a description of the project, information on the experimental setup, data collection, instrumentation used, recording configuration and data quality. The folder structure and content of the data repository are described in detail in Ritter et al. (2019). Time-series data are provided in EMERALD format (Ritter et al., 2015).
The South African Karoo Basin, which is known for its potentially shale gas bearing formations, was the target of an extensive research programme launched by the Nelson Mandela University, South Africa. The aim of this project was to obtain a fundamental understanding of the geology, petrology and hydrology of the sedimentary layers. In 2014, Magnetotelluric (MT) measurements were conducted in the Eastern Karoo Basin to image the electrical conductivity structure of the shallow subsurface and to develop a three-dimensional (3D) model. Previous studies by Weckmann et al. (2007a, b) and Branch et al. (2007) identified the potentially shale gas bearing Whitehill Formation as an electrically conductive sub-horizontal layer, which covers large parts of the Karoo Basin. The increased interest in future shale gas exploration raised concerns regarding the potential impact on aquifers in this water scarce and fragile environment. Since the electrical conductivity is sensitive to fluids, imaging both, the black shale horizon and the deep aquifer system in this region was the ultimate goal of the MT study. Our field experiment is designed to serve as a baseline study before any activity regarding shale gas exploitation commenced. With high resolution 2D and regional 3D inversion and forward models several aquifers, the Whitehill formation and the possible source region of the Beattie Magnetic Anomaly could be mapped.This data publication (10.5880/GIPP-MT.201423.1) encompasses a detailed report in pdf format with a description of the project, information on the experimental setup, data collection, instrumentation used, recording configuration and data quality. The folder structure and content of the data repository are described in detail in Ritter et al. (2019). Time-series data are provided in EMERALD format (Ritter et al., 2015).
The West Bohemian Massif as part of the geodynamically active European Cenozoic Rift System is characterised by ongoing magmatic processes in the intra-continental lithospheric mantle. A series of phenomena such as massive degassing of CO2 and repeated earthquake swarms make the Eger Rift a unique target area for European intra-continental geo-scientific research. The ICDP project "Drilling the Eger Rift" was funded to study the field of earthquake-fluid-rock-biosphere interaction. In the framework of this ICDP project, magnetotelluric (MT) experiments have been conducted to image the subsurface distribution of the electrical conductivity down to depths of several tens of kilometres as the electrical conductivity is particularly sensitive to the presence of high-conductive phases such as aqueous fluids, partial melts or metallic compounds. Based on recent MT experiments in 2015/2016, Munoz et al. (2018) presented 2D images of the electrical conductivity structure along a NS profile across the Eger Rift. It reveals a conductive channel at the earthquake swarm region that extend from the lower crust to the surface forming a pathway for fluids up to the region of the mofettes. A second conductive channel is present in the south of the model. Due to the given station setup along a profile, the resulting 2D inversion allows ambiguous interpretations of this feature. As 3D inversion is required to distinguish between the different interpretations, we conducted another MT field experiment at the end of 2018. This data publication (10.5880/GIPP-MT. 201810 .1) encompasses a detailed report in pdf format with a description of the project, information on the experimental setup, data collection, instrumentation used, recording configuration and data quality. The folder structure and content of the data repository are described in detail in Ritter et al. (2019). Time-series data are provided in EMERALD format (Ritter et al., 2015).
Magnetotellurics (MT) is a geophysical deep sounding tool that can help decipher the deep hydrology and geology of Antarctica, in concert with more established and already applied geophysical methods, such as seismology, gravity, and magnetics. Electrical conductivity is an important physical parameter to identify properties of rocks and, perhaps more importantly, constituents within, such as fluids or mineralisation.The unique conditions of Antarctica, which is largely covered with ice cause technical issues, particularly with the electric field recordings, as highly resistive snow and ice at surface of Antarctica hampers contact of the E-field sensors (telluric electrodes) with the ground. The project was a feasibility study to address this principal problem and to test modified MT equipment of the Geophysical Instrument Pool Potsdam (GIPP) in the vicinity of the Neumayer Station III (NMIII) on the Ekström Ice Shelfon.This data publication encompasses a detailed report in .pdf format with a description of the project, information on the experimental setup, data collection, instrumentation used, recording configuration and data quality. The folder structure and content of the data repository are described in detail in Ritter et al. (2019). Time-series data are provided in EMERALD format (Ritter et al., 2015).
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