Papers by Wolfgang Rabbel
Quantitative archaeology and archaeological modelling, 2024
Can similar patterns or even simultaneous socio-environmental transformations be identified in di... more Can similar patterns or even simultaneous socio-environmental transformations be identified in different European regions? In order to answer such a question, the forms of analysis and interpretation described in Chap. 2 can be brought together, at least to some extent. We discuss some results from the CRC 1266's regional transformation studies together with historically supra-regional transformation phases so far identified. As a reminder: we define transformation as processes leading to a substantial and enduring re-organisation of socio-environmental interaction patterns that occur on different temporal, spatial and social scales (Müller & Kirleis, 2019; see also Chap. 1). The aim is to identify an imprint of the important transformation phases in European prehistory in the period 10,000-1 BCE. With this concluding chapter we shall bring together threads from the previous chapters and begin to weave them together into such an imprint. Structural comparisons have already been made by comparing different parameters in relation to the political economy of some case studies from different periods and different areas (Chap. 9). "The results (Fig. 9.6) indicate that certain parameters are crucial for the formation of clusters. Particularly clear is the relevance of community size, network configuration (especially concerning mobility aspects), resource distribution or accessibility, conformity/non-conformity and aspects of
Journal of geophysics, Mar 1, 1985
Secondary gravity: g, =-0,17 ft-0.08 (p-ft) Total gravity: g = gP+g,, with u=radial displacement ... more Secondary gravity: g, =-0,17 ft-0.08 (p-ft) Total gravity: g = gP+g,, with u=radial displacement in mm, gP, g,, g=primary, secondary and total gravity, respectively, in µgal, p=local pressure variation in mbar, ft= average of the pressure variation in a surrounding area of 2,000 km (in mbar) and ft the same average, except for setting the pressure values equal to zero over ocean areas. These corrections have been tested for seasonal air pressure variations and they have proved to be highly precise.
Understanding the driving mechanisms of continental breakup is still a key question in global geo... more Understanding the driving mechanisms of continental breakup is still a key question in global geodynamics. The Namibian continental margin and Walvis Ridge offer an ideal area for related studies, because it accumulates on-and offshore magmatic features, associated with crustal stretching, a potential plume impact, and continental breakup.
The EGU General Assembly, 2006
SEG Technical Program Expanded Abstracts 2014, 2014
Summary Injected compressed air energy storage (CAES) and brine may seep from deep reservoirs alo... more Summary Injected compressed air energy storage (CAES) and brine may seep from deep reservoirs along weak zones upwards into shallow groundwater aquifers. These CAES and fluid phase leakages cause changes in the electrical resistivity, density and elastic moduli of the aquifers, and justify applications of various geophysical techniques. Applied geophysical techniques can resolve and monitor these brine and CAES anomalies of a sufficient size and contrast inside the aquifer. Our sensitivity study shows that an investigation depth of conductive brine anomalies is at least twice that of resistive CAES anomalies. Based on sensitivity contrasts, seismic and gravity techniques are more sensitive to CAES leakages whereas electric and electromagnetic to brine intrusions.
Sustainable earth sciences 2013 proceedings, 2013
ABSTRACT
Under the roof of the collaborative research centre SFB 574, the Central American subduction zone... more Under the roof of the collaborative research centre SFB 574, the Central American subduction zone is being investigated in a seismological research project conducted by Costa Rican and German partners. The general goal of the SFB574 project is to study the origin and influence of volatiles and fluids in subduction zones. The seismological subproject serves to defining the structural and seismo-tectonical frame work of these investigations. In early 2005 two seismic arrays have been installed: (a) A teleseismic transsect across the Talamanca mountain range consisting of 20 broadband sensors with about 10 km station spacing. The primary goal of this array is to image crustal structure, the Moho and the structure of the subducted slab and mantle wedge. Variations in Vp/Vs ratio are expected to provide information on fluids at deep lithospheric levels. (b) An array of six 1Hz-borehole seismometers has been permanently installed in 100 m deep boreholes on Nicoya peninsula. The borehole i...
pure and applied geophysics, 1999
Reflectivity of the continental crust displays many different patterns. The DEKORP lines are used... more Reflectivity of the continental crust displays many different patterns. The DEKORP lines are used as a basis for comparing and reviewing reflectivity in different tectonic units. The (brittle) upper crust generally exhibits only two types of reflectivity. It is either rather "transparent," preferably in some extensional provinces, or/and it shows traces of thrust and shear zones of former or present ruptures. As these zones have a low impedance interior (with few exceptions), their first reflection onsets have a negative polarity and evince strong, but short signals, which sometimes can be correlated over several kilometers. The (generally ductile) lower crust displays a completely different reflectivity. In warm, extensional and thin crusts the lower part is full of reflecting lamellae. It is suggested that this type of reflectivity has a thermo-rheological origin. The creation of lamellae must take place in a ductile material with contrasting impedance under extensional stresses. It can be associated with mineral alignment and corresponding seismic anisotropy. Destruction of lamellae may take place by a cooling process, transforming parts of the lower crust into a brittle regime. Small stresses might deform or break the lamellae and leave a certain dispersed reflectivity like that in some old (and cold) shields. There are no observations of reflecting lamellae in the upper crust or in the upper mantle. In all areas the Moho is the last reflecting band (reflection Moho), which most often is identical with the classical refraction Moho. There are isolated, mostly dipping, reflections in the uppermost mantle in zones where the last tectonic event, a delamination or subduction, was not succeeded by a heating process. The uppermost mantle is brittle again in most areas and may keep the memory of a (cold) collision over billions of years.
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1994
TESTING is a function of both source type and of formation velocities. Axial stress sources are l... more TESTING is a function of both source type and of formation velocities. Axial stress sources are less affected by the casing than either radial stress or volume-injection sources, and as formation velocity decreases, the effect of the casing becomes more significant. The new generalized stationaryphase solution also shows that as frequency approaches 1000 Hz, the results obtained by low-frequency approximations for stress sources can be inaccurate and that the energy radiated from the source becomes more highly directed in the horizontal directions.-from Author 945127 Hydrological aspects of geophysical borehole measurements in crystalline rocks of the Black Forest
ArchéoSciences, 2021
Highlights: • Applicability of seismic FWI to archaeological targets with strong topography. • Re... more Highlights: • Applicability of seismic FWI to archaeological targets with strong topography. • Reconstruction of building phases and state of preservation using seismic FWI.
AGU Fall Meeting Abstracts, Dec 1, 2019
Universitätsverlag Kiel | Kiel University Publishing eBooks, 2023
DOAJ (DOAJ: Directory of Open Access Journals), 2015
PLOS ONE
We performed geophysical and geoarchaeological investigations in the Wadden Sea off North Frisia ... more We performed geophysical and geoarchaeological investigations in the Wadden Sea off North Frisia (Schleswig-Holstein, Germany) to map the remains and to determine the state of preservation of the medieval settlement of Rungholt, especially its southern dyke segment, called theNiedamdyke. Based on archaeological finds and historical maps, Rungholt is assumed to be located in the wadden sea area around the island Hallig Südfall. During medieval and early modern times, extreme storm events caused major land losses, turning cultivated marshland into tidal flats. Especially the 1stGrote Mandrenke (or St. Marcellus’ flood), an extreme storm surge event in 1362 AD, is addressed as the major event that flooded and destroyed most of the Rungholt cultural landscape. Cultural traces like remains of dykes, drainage ditches, tidal gates, dwelling mounds or even plough marks were randomly surveyed and mapped in the tidal flats by several authors at the beginning of the 20thcentury. Due to the tid...
The work of the Pergamon excavation in 2017 concentrated on the exploration of the Hellenistic re... more The work of the Pergamon excavation in 2017 concentrated on the exploration of the Hellenistic residence city and its surroundings within the framework of the current research programme, whose field work could be completed. The focus was on geophysical prospections and stratigraphic trenches on the burial mound Yığma Tepe. To test hypotheses on the development of the settlement history of the city hill of Pergamon, Bau X on the western slope was examined. The survey of the Kane-peninsula was finished; it provided unexpected insights into the importance of the site for traffic and trade in the microregion. The extensive monument preservation measures at Pergamon concentrated on the Gymnasion and the Red Hall. A detailed preliminary report, which contains also information about other fields of activity such as the study of elite burial practises, will be published in "Archäologischer Anzeiger" 2018/2.
The activities of the Pergamon-excavation in 2015 were part of the continuing research program on... more The activities of the Pergamon-excavation in 2015 were part of the continuing research program on the urban organism of the Hellenistic residential city and on Pergamon´s countryside. The program also includes studies of the ancient necropolis and the natural sanctuaries as integral elements within the presentation of suburbs and hinterland. The campaign focused on (1) geophysical prospection and archaeological sondages at the monumental tumulus Yiğma Tepe, (2) the completion of the excavation within the alleged banquet-building at the northern east-slope, (3) the archaeological and architectural study of the Lower Agora, (4) the continuation and almost completion of the Kane-Peninsula (Kara Dağ) regional harbor survey, (5) the extensive conservation and restoration works at the Red Hall and the Gymnasion of Pergamon. A detailed preliminary report, which contains also information about other fields of activity such as palaeo-anthropology or dendrochronology, will be published in &qu...
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Papers by Wolfgang Rabbel