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  • 1
    Digitale Medien
    Digitale Medien
    Dip angle determination of fault planes from gravity data (1989)
    Springer
    Pure and applied geophysics 130 (1989), S. 735-742 
    Details
    ISSN: 1420-9136
    Schlagwort(e): Gravity modeling ; dip angle of faulted structures ; dimensionless amplitudes
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract This paper illustrates an approach for determining uniquely the dip angle of a faulted structure, approximated by two semi-infinite horizontal slabs, displaced vertically from each other, by making use of the maximum positive and the maximum negative gravity amplitudes. The method is simple and rapid, and it does not necessarily require computing facilities. Two field examples from Aberdeenshire, Scotland and from the Northern Eastern Desert of Egypt are presented in which the angles of dip of two geological contacts are estimated at 45 and 40 degrees, respectively, and verified from surface geology, gravity modeling, and seismic data.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00881608
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Least-squares optimum-order regional geothermal gradient determination from deep borehole temperature data with application to the Western Desert of Egypt (1993)
    Springer
    Studia geophysica et geodaetica 37 (1993), S. 302-314 
    Details
    ISSN: 1573-1626
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Architektur, Bauingenieurwesen, Vermessung , Geologie und Paläontologie , Physik
    Notizen: Summary This paper discusses an approach to determining the least-squares optimum order of a polynomial fit to temperature-gradient data. The optimum is reached when two successive least-squares regional maps are sufficiently similar. This similarity is measured by the correlation factor between the polynomials. The approach was applied to the available deep bore-hole temperature data in the central part of the Northern Western Desert of Egypt. The fitting polynomial was found to be of the second degree. Assuming the thermal conductivity to be uniformly 2·2 Wm−1K−1 for the stratigraphic section in the Western Desert, the heat-flow density ranges between 35 and 70 mW/m2.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01624603
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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    Artikel (Nationallizenzen)
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