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  • 1
    Online Resource
    Online Resource
    Model calculations on the spreading of submarine lava flows (1995)
    Kiel
    Details Availability
    Keywords: Dissertation ; Hochschulschrift
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource ( 104Seiten = 11MB) , Ill., graph. Darst
    URL: https://oceanrep.geomar.de/id/eprint/25978
    Language: English
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    GEOMAR CATALOGUE
    Link to Library Catalog
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  • 2
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    Unknown
    The KTB Deep Crustal Laboratory and the western Eger Graben (2005)
    In:  EPIC3In: GeoErlangen 2005 : Exkursionsführer, Ed.: Koch, R.; Röhling, H.-G., GeoErlangen 2005: System Earth - Biosphere Coupling/Regional Geology of Central Europe (Erlangen 2005), 2005. 37-107 p., Schriftenreihe der Deutschen Gesellschaft für Geowissenschafte
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , notRev
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    PAPER (OA)
  • 3
    Electronic Resource
    Electronic Resource
    3D FD resistivity modelling and sensitivity analyses applied to a highly resistive phonolitic body[Paper pres] (1997)
    Oxford, UK : Blackwell Science Ltd
    Geophysical prospecting 45 (1997), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: A highly resistive phonolitic body near Sainerholz / Westerwald in Germany has been investigated for geological mapping using vertical electrical soundings in a Schlumberger configuration. Because of its explicitly three-dimensional shape, conventional 1D and 2D interpretation techniques are not applicable. Therefore, a new 3D finite-difference forward modelling algorithm has been applied to acquire information about its subsurface structure and to explain the observed data. This investigation focuses on two exposed soundings: one located near the centre of the body and the other close to its rim. For the interpretation, data from electromagnetic measurements on the lateral extension of the body are additionally taken into account as well as geological a priori information. A possible 3D conductivity model is presented and evidence for its validity is discussed using model studies and sensitivity analyses. The latter are carried out using a newly developed 3D FD sensitivity modelling code with which the total subsurface response can be decomposed. This permits the determination of the resolution of model parameters, indicating the contribution of different parts of the model to the overall response. The results emphasize the feasibility of 3D forward modelling in practice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2478.1997.710306.x
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Poroelasticity: parameters reviewed (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 105 (1991), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Deformation of porous rocks is investigated by experts of various fields. This is probably the reason why poroelastic parameters are neither uniformly defined nor represented by standard symbols in the literature, and why inconsistencies have appeared in some publications. This paper is intended to clarify the use of material properties in order to facilitate application of poroelasticity theory. The key parameters referenced from a selection of mostly recent papers are: drained and undrained moduli and Poisson ratios, grain and pore compressibilities, the coefficient of effective stress, the Skemption ratio (pore pressure parameter), storage parameters, the Darcy conductivity, and the hydraulic diffusivity. The latter parameter governs the diffusional behaviour of poroelastic processes, as has been demonstrated by Rice & Cleary (1976). Herein, their formulation of the theory is used. References to Biot's (1941) parameters, which may be more familiar to some researchers, are given for completeness. A variety of extensions of the theory that have been elaborated by others is outlined in the last section.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1991.tb00813.x
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Scaling behaviour of vertical magnetic susceptibility and its fractal characterization: an example from the German continental deep drilling project (KTB) (1996)
    Springer
    International journal of earth sciences 85 (1996), S. 50-57 
    Details
    ISSN: 1437-3262
    Keywords: Magnetic susceptibility ; Crustal inhomogeneities ; Fractal dimension ; Spectral analysis ; Rescaled-range analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The variations of rock magnetism reflect the geological inhomogeneities of the earth's crust, i.e. its petrological-mineralogical and structural organization. The present state of the crust bears meaningful information of its past dynamic processes and evolution. We analysed magnetic susceptibility data series from the boreholes of the German Continental Deep Drilling Project (KTB). By means of spectral and rescaled-range (R/S) analyses we could detect a scaling behaviour of magnetic data series and quantify it in fractal terms. In particular, the R/S method yields more precise results than the Fourier analysis and leads to Hurst coefficients H 〉 0.5, which means that the magnetic variations exhibit some persistence with depth. Because of the relation between rock magnetism and crustal features, we suggest that the magnetic vertical inhomogeneities in the KTB area can be described by a self-affine model with H ≌ 0.8, corresponding to a fractal dimension D ≌ 1.2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00192060
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Book reviews (1996)
    Springer
    GeoJournal 39 (1996), S. 413-419 
    Details
    ISSN: 1572-9893
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02428505
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    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Scaling behaviour of vertical magnetic susceptibility and its fractal characterization: an example from the German Continental Deep Drilling Project (KTB) (1996)
    Springer
    Geologische Rundschau 85 (1996), S. 50-57 
    Details
    ISSN: 0016-7835
    Keywords: Key words Magnetic susceptibility ; Crustal inhomogeneities ; Fractal dimension ; Spectral analysis ; Rescaled-range analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  The variations of rock magnetism reflect the geological inhomogeneities of the earth's crust, i.e. its petrological-mineralogical and structural organization. The present state of the crust bears meaningful information of its past dynamic processes and evolution. We analysed magnetic susceptibility data series from the boreholes of the German Continental Deep Drilling Project (KTB). By means of spectral and rescaled-range (R/S) analyses we could detect a scaling behaviour of magnetic data series and quantify it in fractal terms. In particular, the R/S method yields more precise results than the Fourier analysis and leads to Hurst coefficients H〉0.5, which means that the magnetic variations exhibit some persistence with depth. Because of the relation between rock magnetism and crustal features, we suggest that the magnetic vertical inhomogeneities in the KTB area can be described by a self-affine model with H≅0.8, corresponding to a fractal dimension D≅1.2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00192060
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    Paper (German National Licenses)
    Fulltext
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