Inst. Angewandte Geowissenschaften

112 Items

Recent Submissions
High-resolution shear wave reflection seismics and borehole seismics as tools for the imaging and the characterization of near-surface subrosion structures

Wadas, Sonja Halina (2018)

Subrosion and the resulting structures, such as sinkholes and depressions, pose a great hazard risk. They can cause damage to buildings and infrastructure, and lead to life-threatening situations. But compared to other natural hazards, like earthquakes and tsunamis, very little is known about the generation processes or the possibilities of forecasting. Germany suffers from a widespread sinkhol...

On the frequency-dependence of electrical soil properties and their influence on ground-penetrating radar

Loewer, Markus (2018)

Ground-Penetrating Radar (GPR) is sensitive to changes of electrical soil properties. These properties can become strongly frequency-dependent, even so they are considered constant in many applications. Analysis of radargrams provided evidence that radar waves propagating in moist loamy and clayey soils underlie strong absorption and dispersion effects. The energy absorption together with the w...

Microbial signatures and quality assessment of Siberian permafrost organic matter for future biogenic greenhouse gas production

Stapel, Janina Gabriele (2018)

The Earth´s high latitude regions, where recent warming has been amplified, are of particular concern in the light of future climate change. Annual average temperatures in the Arctic have risen by 0.6 °C per decade over the last 30 years, and this warming trend resulted into the thaw of perennially frozen ground (permafrost), which exposes substantial amounts of previously frozen organic carbon...

Dissolution-precipitation reactions in the system Al2O3-SiO2-H2O and the formation of Al2SiO5

Schultze, Dina (2018)

The study of mineral replacement reactions can provide detailed insight into chemical processes, if experimental simulation and natural observation are combined. Among all chemical systems, the Al2O3-SiO2-H2O is one of the most intensely studied but some of our knowledge about it is still inconsistent. Especially problematic is the inhibited reaction of corundum and quartz to Al2SiO5 polymorphs...

A dataset of housing market and self-attitudestowards housing location choices in Alexandria, Egypt

Ibrahim, Mohamed R. (2017-03-09)

A survey, of sample size 224, is designed to include the different related-factors to housing location choice, such as; socioeconomic factors, housing characteristics, travel behavior, current self-selection factors, housing demand and future location preferences. It comprises 16 questions, categorized into three different sections; socioeconomic (5 Questions), current dwelling unit characteris...

Impact and mitigation of borehole related effects in permanent crosshole resistivity imaging: An example from the Ketzin CO2 storage site

Wagner, Florian M. ; Bergmann, Peter ; Rücker, Carsten ; Wiese, Bernd ; Labitzke, Tim ; Schmidt-Hattenberger, Cornelia ; Maurer, Hansruedi (2015)

Geoelectrical methods are particularly suited for CO2 injection monitoring due to their high sensitivity to fluid displacement processes in porous rock formations. The use of borehole electrodes is favorable for deep storage horizons. Yet data acquisition based on permanently installed borehole electrodes can be challenged by the finite extent of the electrodes, unintended borehole deviation an...

Near‐surface fault detection using high‐resolution shear wave reflection seismics at the CO2CRC Otway Project site, Australia

Beilecke, Thies ; Krawczyk, Charlotte M. ; Ziesch, Jennifer ; Tanner, David C. (2016-07-28)

High‐resolution, near‐surface, shear wave reflection seismic measurements were carried out in November 2013 at the CO2CRC Otway Project site, Victoria, Australia, with the aim to determine whether and, if so, where deeper faults reach the near subsurface. From a previous P wave 3‐D reflection seismic data set that was concentrated on a reservoir at 2 km depth, we can only interpret faults up to...

Copper precipitation as consequence of steel corrosion in a flow-through experiment mimicking a geothermal production well

Regenspurg, Simona ; Geigenmüller, Ives ; Milsch, Harald ; Kühn, Michael (2017)

Decreasing production rates and massive precipitation of native copper (Cu(0)) were observed in the production well at the geothermal research facility Groß Schönebeck (Germany). The Cu precipitates filling up the well are a product of an electrochemical corrosion reaction between dissolved copper (Cu2+, Cu+) in the brine and iron (Fe(0)) of the carbon steel liner. It was hypothesized that this...

Composition, properties, origin and evolutionary pathways of solid bitumens from SE Turkey

Hosseini Baghsangani, Seyed Hossein (2018)

The south-eastern region of Turkey is the most petroliferous region of the country and there are many surface and subsurface hydrocarbon occurrences. In particular, this region is noted for the widespread occurrence of solid bitumen veins and vugs, ostensibly generated from the same source but showing different physicochemical characteristics depending upon their geographic location. Although t...

3D‐Seismikinterpretation, Struktur‐ und Attributanalyse sowie Visualisierung submariner Canyons, Mud Volcanoes und Pockmarks am Kontinentalhang des Nigerdelta‐Beckens

Sehnert, Christian (2018)

In dieser Arbeit wurden mithilfe der 3D-Seismikinterpretation, der seismischen Struktur- sowie Attributanalyse geologische Strukturen im Bereich des zentralen submarinen Nigerdeltas untersucht. In dem 3.282 Quadratkilometer großen Untersuchungsgebiet wurden ein submariner Canyon, zwei Paläo-Canyons, 43 Mud Volcanoes, 17 Paläo-Mud Volcanoes und fünf große Pockmark-Felder identifiziert. Zudem...

Water resources management in the Atacama Desert

Scheihing, Konstantin W. (2018)

Different stakeholders depend on the depleting groundwater resources in the Atacama Desert of northern Chile. Endeavors in water resources management encounter the arduous task of balancing the often-opposing poles of societal, economic, political and environmental interests. Finding – at best – sustainable solutions to modern challenges is aggravated by a lack of understanding of hydrological ...

Development of numerical methods and approaches to simulate colloid transport and stream-aquifer interaction in heterogeneous natural soils

Zhou, Dan (2018)

Groundwater recharge and contamination are important aspects of groundwater resource management. Groundwater systems are typically constrained by the availability of field observations. Therefore, mathematical models are developed by hydrologists and hydrogeologists to provide a reliable description of the groundwater system for quantitative analysis and uncertainty forecast. However, many curr...

Roles of organic-inorganic interactions in the generation of petroleum as exemplified by Lower Palaeozoic petroleum systems, Europe

Yang, Shengyu (2017)

The clay-rich Lower Carboniferous Bowland Shale (England) and the uranium-rich Cambro-Ordovician Alum Shale (Northern Europe), both deposited in marine environments, are characterized by dominating gaseous and aromatic compounds in pyrolysates. Therefore, the kerogens in both of these shales can be classified as type III from classical perspectives, which is not consistent with the depositional...

The effect of tetrahedral boron in tourmaline on the boron isotope fractionation between tourmaline and fluid

Kutzschbach, Martin (2017)

Tourmaline is the most abundant borosilicate in the Earth’s crust and the ratio of its two B isotopes (¹¹B/¹⁰B) helps to unravel the source and evolution of fluids during metamorphic, magmatic and hydrothermal processes. For example, tourmaline is a common accessory mineral in the metasedimentary Pfitsch Formation located in the Pfitscher Joch area in the western TauernWindow (Alps). Here, tour...

Biogeochemical process studies on oil sand tailings used for land reclamation in Alberta, Canada

Noah, Mareike (2017)

The Canadian oil sand region, located in the northern part of the province Alberta, holds the third largest oil reserves in the world with an estimated volume of 173 billion barrels of heavily biodegraded petroleum. Surface mining of oil sand deposits which are situated in low depth, has a huge impact on the surrounding environment due to the removement of vegetation, surface soils, and subsurf...

Organic-inorganic interactions in siliciclastic oil reservoirs, North Sea

Mu, Nana (2017)

Sandstones are important reservoir rocks for a variety of fluids. Their properties, such as porosity and permeability, which are crucial factors for petroleum production, primarily depend on depositional environments. Additionally, subsequent geochemical alterations by depth-related reactions (“classic diagenesis”), organic-inorganic interactions, and mixing of basin fluids can also significant...

Oil retention and migration in the Barnett, Posidonia, and Niobrara shales

Han, Yuanjia (2017)

Given the current shale oil boom in U.S., the primary objective of this dissertation is to clarify the factors controlling retention and migration of oil in selected shale ”plays”. With reference to three TypeII marine shales namely the Barnett, Posidonia and Niobrara Shales, a suite of 694 samples ranging in age from Mississippian to Campanian, varying in maturity from immature to overmature, ...

Transport and attenuation of particulate matter together with organic micropollutants within karst aquifers

Schiperski, Ferry (2017)

Karst aquifers are intensively used for drinking water production around the world. In some European countries karst water contributes to about 50% of the drinking water supply. In contrast to porous aquifers, particulate matter like clay particles or bacteria is transported over long distances in these aquifers, which results in three main problems and questions related to the transport of...

Sedimentology and diagenesis of lower and upper carboniferous sediments in the North German Basin

Kerschke, Dorit Ines (2016)

158 samples from core material of thirteen former oil and gas exploration wells provided by the Federal Geological Surveys of Brandenburg (LBGR), Mecklenburg-Vorpommern (LUNG), Sachsen-Anhalt (LABG), Nordrhein-Westfalen (GD-NRW), and the Netherlands Organization for Applied Scientific Research (TNO). Additional samples were taken in outcrops along the northern margin of the Rhenish Slate Mounta...

Sedimentology and diagenesis of lower and upper carboniferous sediments in the North German Basin

Kerschke, Dorit Ines (2016)

Carboniferous organic-rich mudrocks are proven source rocks for conventional gas systems in Northwestern Europe and have sourced most of the gas found in the Rotliegend sandstones (di Primio et al., 2008). They are therefore considered as one of the stratigraphic horizons in the North German Basin that potentially could host unconventional gas occurrences. Recent gas-in-place (GIP) estimates of...