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  • 1
    Electronic Resource
    Electronic Resource
    SOME OBSERVATIONS ON SEISMIC WEATHERING CORRECTIONS (1954)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 2 (1954), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: When a rather extensive network of short distance refraction profiles was shot the following two observations were made. Firstly, the wave velocity in the weathered layer showed a quite considerable fluctuation in horizontal direction, the extreme values being of the order of 300 and 700 m/sec. A practical result of this scattering of the velocities is that an uncertainty of about 10% is introduced in the computation of the weathering corrections. The second observation is that, in the majority of cases, the travel time curve does not pass through the origin. It could be ascertained that this observation was not caused by errors in the method of observation. A probable explanation of the phenomenon is found in a theory that has been developed by Gassmann, who derived the velocity distribution for a hexagonal packing of spherical solid bodies. According to this theory extremely low velocities would occur in the first few centimeters of the crust of the earth. Qualitatively, our observations are in agreement with the theory of Gassmann.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1954.tb01292.x
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  • 2
    Electronic Resource
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    BRITISH SEISMIC EXPLOSIVES–THEIR STORAGE AND USE IN THE FIELD WITH SPECIAL REFERENCE TO SAFETY IN HANDLING (1954)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 2 (1954), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1954.tb01286.x
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  • 3
    Electronic Resource
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    A TEST ON ELASTIC ANISOTROPY MEASUREMENT AT BERRIANE (North Sahara) (1954)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 2 (1954), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The geophysicists who attempted to evaluate elastic anisotropy of some bedded formations most often gave but little information about recording and interpretating the measurements.May be they did not lay enough stress on the fact that any determination of the anisotropy factor is a critical operation and that, to have some certainty. it must be made under good conditions and then discussed.Due to the very favourable conditions offered: undisturbed tectonics and topography, relatively regular series the Berriane district in Northern Sahara, is rather well suited to accurate measurements and to an anisotropy study down to 1,250 meters. Since measurements have been carried out in the wildcat drilled at Berriane by S. N. Repal, it seems interesting to communicate the results obtained and to discuss them according to the influence of high velocity layers.It can be noted that in the clay and sand series which have been investigated, anisotropy coefficient amounts to 1.09 or so.To conclude, it seems desirable that determinations made by numerous operators should allow a more accurate knowledge of the anisotropy factor in the main types of rocks.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1954.tb01289.x
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  • 4
    Electronic Resource
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    A COMPARISON OF THE SECOND DERIVATIVE METHOD OF GRAVITY INTERPRETATION WITH REFLECTION SEISMICS AND GEOLOGICAL FINDINGS IN THE OFFENBURG AREA (1954)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 2 (1954), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The aim of the present investigation is to examine the significance of the second derivative for the purpose of the prospective determination of the geological properties of the district of Offenburg, which are relatively wellknown as a result of both reflection seismic and bore profile findings.The calculation of the second derivative is carried out by means of three approximation formulae, which are compared with each other. In contrast to the isogam map the second derivative shows some additional characteristics, whose structural significance illuminates the comparison with the results of reflection seismics.A geological profile constructed on the basis of 6 wells completely confirms the geophysical findings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1954.tb01276.x
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  • 5
    Electronic Resource
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    THE INITIAL ADJUSTMENTS OF VERTICAL VARIOMETERS (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: Using a comprehensive theory of the vertical force variometer, it is shown that the mean of the two readings taken in azimuths 180 degrees apart only eliminates the error of misorientation and of inclination of the knife edge if these factors are sufficiently small. The necessary accuracy in the 180 degree rotation and in the readjustment of the levels are investigated and a practical test is developed to allow the initial adjustments to be determined. Finally, a brief description of a new variometer tripod is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01146.x
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  • 6
    Electronic Resource
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    CALCUL DU GRADIENT VERTICAL DU CHAMP DE GRAVITE ou DU CHAMP MAGNETIQUE MESURE A LA SURFACE DU SOL (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: It is known that good use can be made of calculating the second vertical derivative of gravitational and magnetic fields. The first derivative, or Vertical Gradient, has the same properties, Like the second derivative, it does not depend on the locally linear regional anomaly. Moreover, the gradient is less affected by experimental errors.The report gives a practical method of calculating the vertical gradient. Its application is identical to that in general use for calculating the second derivative, except that the numerical coefficients are different. The method also allows the establishment of formulae for downward extension of the field and its derivatives.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01139.x
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  • 7
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    ON THE INTERPRETATION OF GRAVITY DATA (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01133.x
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  • 8
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    SOME PRACTICAL EXAMPLES OF INTERPRETATION OF TELLURIC METHODS IN LANGUEDOC (SOUTH-EASTERN FRANCE) (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: In the region covered by the paper, electrical methods have been applied in four different zones:〈list xml:id="l1" style="custom"〉a) Ales-Maruejols Basin (resistive lower Oligocene blanketed by conductive Upper Oligocene);b) Ledignan and Vaunage-Lunel anticlines (faulted structures in the marly and limy Cretaceous, with different resistivities;c) Camargue (thick series of conductive sediments);d) Beziers Basin (highly complicated structures in the Mesozoic, widely blanketed by conductive Miocene).It may be assumed that electrical methods can yield valuable information enabling one to define the rugged subsurface topography of resistive strata burried under a reasonably thick cover of conductive sediments especially when a part of the lower formation outcrops even if the part exposed be small. Faults may be delineated and much, more information is obtainable than can be expected from gravity meter survey at a price not very much higher.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01143.x
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  • 9
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    BEITRAG ZUR INTERPRETATION VON SCHWEREBILDERN MIT HILFE HöHERER ABLEITUNGEN (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: For the treatment of the problems involved in the interpretation of gravity pictures this paper gives a formula that holds generally for any potential function. It provides an extended applicability of the relation used by Elkins for the computation of the second derivative, and also yields an analogous relation to derivatives of higher order of the gravity field.This relation has not been utilized to determine in details the course of the derivatives of higher order in a plane, but is merely applied to points of comparatively extreme curvature of the isogams where the differential values present a ratio favourable to the “noise level”. By this method the values of the derivatives of higher order will not be determined themselves but only the ratio's responsible for the depth of divergence in comparison with the course of an anomaly of masses replaced by points.It is shown by examples of intercalated masses that the divergence points are important and by law related to the form and position of the density contrasts themselves.An analysis of the total gravity picture is made possible by progressing from elements close to the surface to deeper ones. In this way the fundamental features of the earth's crust will be obtained. The application of the analysis process to a gravity anomaly actually measured in Northwest Germany is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01145.x
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  • 10
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    A DEVICE FOR OVERCOMING THE EFFECTS OF STATIC ON SEISMIC SHOT SIGNALS (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: When refraction time signals are transmitted over a radio link between shooter and observer there is a serious risk of interference from electrical storms. This risk can be minimised by sending a series of signals at fixed time intervals and the paper describes a simple device which will do this with the required accuracy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01140.x
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  • 11
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    APPLICATION OF VERTICAL GRADIENTS AND COMPARISON OF DIFFERENT GEOPHYSICAL METHODS IN A DIFFICULT AREA (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: Seismic reflection, telluric and gravity results are given for the lifted area of Ferrara, in Northern Italy. The agreement is shown between the available shallow seismic data and the gravity evidences. For a portion of the above area where seismic results are particularly poor the vertical gradients method gives a resolution of a gravity anomaly and confirms the telluric information. The residual gravity values, the vertical gradients and the telluric data along a seismic line crossing the zone are compared with seismic results and with evidences from adjacent wells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01142.x
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  • 12
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    POSSIBILITIES OF CONSTRUCTING TRUE RAY PATHS IN REFLECTION SEISMIC INTERPRETATION (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: Investigations into reflection seismic on the salt structure of Heide raised the following questions:〈list xml:id="l1" style="custom"〉1) How can the different directions of trend of a series of layers be established?2) How are the contour maps of reflecting horizons to be constructed if there is no general trend of the layers?To answer these questions, the case of the subsoil consisting of a series of layers with plane reflecting beds and constant layer-velocities is treated strictly. The strike lines of the reflecting planes may be at any angle whatever. However, formulas for constructing contour maps of the reflecting planes have been derived. With these formulas, the problem quoted under 1) has also been solved.The construction of contour maps is given.For special cases, formulas are obtained which have already been proved by others.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01136.x
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  • 13
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    SUR LE CALCUL DE L'INFLUENCE GRAVIMETRIQUE DES STRUCTURES DEFINIES PAR LES ISOBATHES (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The triple integral for the attraction of a mass on a point is transformed in a double sum. This double sum serves to construct a graph for the rapid determination of the gravimetric influence of structures given by depth contours. The influence of topography can also be computed with this graph.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01130.x
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  • 14
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    EXTENSION TO THREEDIMENSIONAL PROBLEMS CONCERNING AN APPROXIMATE CORRECTION METHOD FOR REFRACTION IN REFLECTION SEISMIC PROSPECTING (1954)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 2 (1954), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The formulas derived by the author in a preliminary paper for taking into consideration refraction when dealing with the problem of a vertical plane are extended to the three-dimensional case. Vector analysis is extensively applied. Among others it is shown that in the general case the 3 horizontal twodimensional vectors, i.e.〈list xml:id="l1" style="custom"〉1) the gradient of the time of reflection2) the direction of true dip3) the vector from the shot point to the projection of the reflecting point, point into 3 different directions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1954.tb01280.x
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  • 15
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    DIE ABHÄNGIGKEIT DES SCHEINBAREN WIDERSTANDES VOM SONDENABSTAND BEI DER VIERPUNKT-METHODE (1954)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 2 (1954), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The dependence of the apparent resistivity on the distance between the potential electrodes is examined and a numerical method is described permitting quantitative calculations. Such a numerical relation is also established for the transformation of Wenner graphs into Schlumberger graphs.In addition it is shown, in which manner the jumps in observed Schlumberger curves, that result from changing the probe spacing, must be smoothed out.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1954.tb01291.x
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  • 16
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    ROLE JOUÉ PAR LA CORRECTION LUNI-SOLAIRE EN PROSPECTION GRAVIMETRIQUE (1954)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 2 (1954), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The luni-solar corrections are considered under the three following aspects:Quality of results: the application of tidal corrections to all stations is pointless as long as the operations do not substantially exceed two hours.Working conditions: it seems possible to increase the duration of programs without any loss of precision, but operating in such a way requires particular care.Behaviour of gravity meters: the introduction of tidal corrections allows to separate three kinds of instrumental drifts; a good knowledge of the mean operational drift enables to appreciate the quality of a given set of measurements.An example is given to show the possibility in some cases to detect small errors which are close to the limit of precision of the instrument.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1954.tb01295.x
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  • 17
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    HYDROLOGICAL SURVEYS IN THE CATANIA AREA BY MEANS OF ELECTRICAL SOUNDINGS (1954)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 2 (1954), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: Exploration of the Catania region was carried out for over a year by means of electrical soundings. The thickness of the overburden (lava and alluvium) was thus computed and the contour map of the blue clays basement shows the existence of several buried channels where new wells were drilled, all of them successful.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1954.tb01288.x
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  • 18
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    A RESISTIVITY INVESTIGATION INTO A WASHOUT FEATURE IN COAL MEASURE STRATA (1954)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 2 (1954), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The paper consists of an account of a resistivity investigation into an old river valley in Coal Measure strata. This valley denuded several of the upper coal seams leaving behind unconsolidated material and it was the purpose of the work to be described to investigate how far the extent and nature of this material could be determined by resistivity methods conducted at the surface.As such the survey fits into a wider programme of research instigated by the National Coal Board.The feature, which is quite well known geologically, was surveyed by conventional methods and the results obtained are discussed in relation to the above project.Thus, the investigations succeeded in tracing the approximate centre line of the feature and in yielding some information on the nature and order of thickness of the deposits. Limitations of the method and its future application are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1954.tb01277.x
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  • 19
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    THE PREPARATION OF PAPERS FOR “GEOPHYSICAL PROSPECTING” AND THEIR PRESENTATION AT TECHNICAL MEETINGS (1954)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 2 (1954), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The efficient production of “Geophysical Prospecting” depends upon the co-operation of the individual authors and this paper serves as a guide for them. Some suggestions are also made on the presentation of papers at meetings in the hope of promoting successful discussions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1954.tb01290.x
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  • 20
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    WHAT IS OUR CONTRIBUTION? (1954)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 2 (1954), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1954.tb01285.x
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  • 21
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    A PROCESS OF SEISMIC REFLECTION INTERPRETATION (1954)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 2 (1954), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: A process is described whereby the interpretation of seismic reflection data is carried out by a preliminary two-dimensional plotting procedure followed by a three-dimensional migration. The concept of a surface of maximum convexity is introduced as an integral part of the process of migration. The procedures for deriving the necessary charts of curves are considered and a number of serviceable charts presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1954.tb01281.x
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  • 22
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    QUANTITATIVE STUDIES CONCERNING THE VERTICAL GRADIENT AND SECOND DERIVATIVE METHODS OF GRAVITY INTERPRETATION (1954)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 2 (1954), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: In the first part of the present paper we shall investigate the possibility of localising highly situated inclined faults with the aid of the vertical gradient and the second derivative in the direction of the vertical. Since these quantities have been computed from gravity values by means of formulae of approximation we shall have to study the question as to their applicability for possible quantitative interpretation. Particular caution should be exercised when making the usual comparison with theoretical test examples. For three effects have to be taken into account which result from the application of the formulae of approximation:〈list xml:id="l1" style="custom"〉1) The extreme values appear more or less smoothed out2) Extremal abscissae are being displaced3) The results are influenced by the orientation of the grid which forms the basis of the calculation.For a practical instance it was possible to locate a well under troublesome circumstances. This well is situated on the downthrown side of an inclined fault, the depth of the upthrown side being known as a result of another well.We shall show in the second part of the present paper how small, deeply situated structures may be recognised in the diagrams of the vertical gradient and of the second derivative. In the case of two practical instances the effect of these structures is rendered unrecognisable in the isogam map in view of regional influences. The results according to the formulae of Baranov, Elkins and Rosenbach are contrasted with each other.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1954.tb01282.x
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  • 23
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    A REMARK CONCERNING THE PROBLEM OF HOW TO PLACE THE REFERENCE PLANE (DATUM LEVEL) IN REFLECTION SEISMIC PROSPECTING (1954)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 2 (1954), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: It has been shown in a paper by L. Y. Faust that the wave velocity in rock depends on the depth below the ground surface according to a specified equation. It follows that the attitude of the planes of equal velocity is influenced by the topographic relief. Under these conditions the problem arises of how to place the reference plane in such a manner, that the fluctuations of the planes of equal velocity, that result from the fluctuations in the topography, shall not affect the results of the depth computations. In the present paper an analytical solution of this problem is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1954.tb01293.x
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  • 24
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    SOME REMARKS ON THE ERRORS IN THE CALCULATION OF THE VERTICAL GRADIENT OF GRAVITY (1954)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 2 (1954), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: In a previous paper by the first author a method has been presented for computing the first vertical derivative of the gravity field or of the magnetic field. In the present paper an analysis is given of the errors in the first vertical derivative that result when the latter is computed by the above method. Two sorts of errors are considered. Firstly, the error in the first vertical derivative that results from the errors in interpolating between isogam lines on the Bouguer anomaly map. Secondly, the error in the first vertical derivative that results from the approximations upon which the computation method is based. The conclusion is reached that both sorts of error are only of minor importance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1954.tb01294.x
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  • 25
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    SUR UNE METHODE ANALYTIQUE DE CALCUL DE L'ANOMALIE REGIONALE (1954)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 2 (1954), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The common notion, that the regional anomaly must be as regular as possible, can be translated into mathematical language by requiring that the regional anomaly shall be represented, over a not too large area, by a surface of the second or of the third degree. The residual anomaly is commonly defined by the requirement that its horizontal dimensions must be as small as possible. This implies that also its amplitude should be small. This requirement may be moulded into a mathematical form by stating that the square of the difference between the Bouguer anomaly and the regional anomaly, integrated over a certain area, must be a minimum. On these two definitions an analytic method is based for deriving the regional anomaly. Practical computation procedures are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1954.tb01287.x
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  • 26
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    ON THE PROPAGATION OF SEISMIC WAVES IN A SOLID BODY WITH ELASTIC AFTERWORKING (1954)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 2 (1954), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The different equations of elasticity concerning the departure of the behaviour of rocks from perfect elasticity are discussed. The theory of elastic afterworking and its significance for the propagation of elastic waves is studied in detail. It is found that this theory does not explain the observations on seismic waves in exploration geophysics so well as the theory of viscoelasticity suggested by Ricker.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1954.tb01283.x
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    ZUR BESTIMMUNG VON WELLENGESCHWINDIGKEITEN AUS REFLEXIONSSEISMISCHEN MESSUNGEN (1954)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 2 (1954), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1954.tb01284.x
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    CERTITUDE DES RÉSULTATS DE LA PROSPECTION GÉOPHYSIQUE (1954)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 2 (1954), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The writer classifies problems of geophysical interpretation. He distinguishes four fundamental problems and indicates the methods of solving them. Among these methods he refers to classical methods and methods based on the writer's theoretical work.The geophysical examples are developed, as well as the very simple numerical examples. Methods of enumeration are also referred to. The whole object is to show that the practical application of the geophysical methods suggested will not give prospectors any difficulty.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1954.tb01278.x
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    A PRACTICAL EXAMPLE OF AN ANISOTROPIC VELOCITY-LAYER (1954)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 2 (1954), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The results obtained from a number of seismic velocity well-logging surveys and adjacent refraction sections are compared. The velocities derived by these two methods for a certain layer are found to differ appreciably. This is shown by presenting the time-depth relations of the well-surveys and the time-d stance relations of the refraction sections at three locations, plotted on graphs with sloping depth- and distance axes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1954.tb01279.x
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    LAUFZEITMESSUNGEN AN BOHRKERNEN UND GESTEINSPROBEN MIT ELEKTRONISCHEN MITTELN (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: Supersonic pulses are transmitted into rock samples and cylindrical drill cores of about 10 cm to about 100 cm in length by a magnetostrictive driver attached to one end. The pulses are received at any chosen distance along the core by a small crystal geophone resting on the specimen. The beginning of the supersonic pulse and the wave form of the received disturbance, together with the marks of an accurate timer by a quartz clock, are made visual and stationary on the screen of a cathode-ray oscillograph and the travel-time is measured. Thus the core is picked up at different distances and a travel-time curve is drawn from which the velocity of the waves is determined.The method is interpreted and the measuring device described. Graphs give several travel-time curves of different rock samples, drill cores, metal rods and rods of other solid materials. The elastic moduli E of the samples are communicated, and an example is given for determining Poisson's ratio S from longitudinal and transversal velocities on two cores of sandstone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01135.x
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    SOME REMARKS ON THE INTERPRETATION OF GRAVITATIONAL AND MAGNETIC ANOMALIES (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: Two geometric methods are given: one for estimating the position of mass distributions from the gravity anomalies, the other for determining the position of a thin plate of magnetized material from the magnetic anomalies. Finally a computational form of Nettleton's method for the determination of density is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01129.x
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    GEO-ELECTRICAL PROBLEMS OF THE HYDROLOGY OF WEST GERMAN AREAS (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The supply of drinking water and water for general use in the towns and communities of Western Germany is in many cases insufficient. In order to eliminate the difficulties in the supply of water, geophysical methods have been applied to a large extent since the end of the war.The most important hydrological problems, which were solved successfully by geo-electrical measurements, are as follows:〈list xml:id="l1" style="custom"〉1Search for, and delimitation of, areas with salty ground water.2Investigation of the geological situation in catchment areas for large waterworks, and the finding of suitable places for the establishment of new plants, and in particular.3Search for and determination of the thickness and nature of water-bearing sands and gravels and of the relief of the underlying impervious strata.Some typical examples are presented herewith.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01144.x
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    AN ATTEMPT TO INTERPRET THE GRAVIMETRIC MAP OF THE NORTHERN PART OF THE MOROCCAN BASIN OF GHARB. MAPS OF RESIDUAL ANOMALY AND FIRST DERIVATIVE (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The main features of the gravimetric map of the Gharb can be related to the shape of the basement, covered by cretaceous and miocene layers, with a total maximum thickness of 13,000 feet. For the interpretation of local features, in the northern part of the basin, first a regional anomaly has been drawn, then the map of the first derivative has been established.Both maps are compared with geological maps and seismic and electrical surveys. The results are the following:As for method, the advantages and limitations of both processes are outlined.As for geological interpretation, it is suggested that most of the local features of the gravimetric map are due to the preriffan tectonics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01148.x
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    THE APPLICATION OF RESISTIVITY METHODS IN ESTABLISHING THE BASE OF THE WATER-BEARING ROCKS IN THE CANNOCK CHASE COALFIELD (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: In the Cannock Chase Coalfield the rocks of the overburden are heavily waterlogged, thus constituting a source of difficulty and even danger to the miner. In order to ensure maximum safety with the maximum use of reserves, the area has been investigated by boreholes and by resistivity surveys.In this paper a short summary of the resistivity work is given, with especial reference to electrode arrangement and methods of interpretation used. Where applicable, comparison between resistivity evidence and borehole data is shown.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01141.x
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    ERRATA (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01137.x
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    THE DESIGN OF ELECTROMAGNETIC GEOPHONES (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: This paper summarizes and extends the published information on the theoretical design of electromagnetic geophones. Both moving-coil and moving-armature instruments are considered, their behaviour compared and various design criteria established.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01128.x
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    REFLEXIONS MULTIPLES OBLIQUES (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: After a short introduction, some examples of obliques multiple reflexions are treated and possible solutions given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01132.x
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    LAUFZEITANOMALIEN IM BEREICH EINER STöRUNG (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The measurement of well velocity data in the well of Scheibenhardt I has shown that it is possible to observe a well noticeable measurable increase of the travel time of seismic waves when approaching a disturbance. The tectonic event of the disturbance is combined in this case with a disorder (shattering) of the layers without subsequent cementation.The significance of these anomalies for reflection seismics is discussed. When existing they will then overlap the diffraction, treated by Th. Krey.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01147.x
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    A STUDY OF WELL VELOCITY DATA IN NORTH WEST GERMANY (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The article is based on data from 74 seismic well velocity surveys in N.W. Germany.The effect of overburden is illustrated by means of diagrams representing interval velocities against depth. To eliminate observational errors and lithological variations from well to well, interval velocities from about the same depth are averaged. Thus, relatively uniform curves are obtained for lower Tertiary, Upper Cretaceous, and Lower Cretaceous (Albian), making the effect of overburden better evident than from individual observations. The vertical gradient of velocity for these geological sections are given. Furthermore, they are compared with curves for Lower Tertiary and Cretaceous obtained in N. America. Due to its high lime content, the Upper Cretaceous of N.W. Germany has a much higher velocity than that observed in the Cretaceous of N. America. The curves for shales of the Lower Tertiary and Lower Cretaceous (Albian), however, are similar in both countries. In older formations, on the other hand, e.g. Jurassic and Triassic, lithologic character has the dominant influence and the effect of overburden is rather small and often scarcely noticeable.The data considered cover a depth range down to 2,700 meters. The interval velocities are generally based on the use of various equal intervals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01138.x
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    GRAVITY EFFECT OF EARTH TIDES (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
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    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The gravity effect of earth tides was measured simultaneously at 26 stations, with 2 instruments at 3 of the stations. After a description of the stations, the corrections on the measurements are described. The results for the separate measurements are given and it can be stated that, within the accuracy of the measurements 〈inlineGraphic alt="inline image" href="urn:x-wiley:00168025:GPR82:GPR_82_mu1" location="equation/GPR_82_mu1.gif"/〉 is very probably constant and has a value of 1.22. If this value is combined with Nishimura's value 0.66 for (1 − h + k), it can be shown that Takeuchi's earth models fit these values provided a value of 2.7 is taken for the surface density of the earth. The importance of a constant value for 〈inlineGraphic alt="inline image" href="urn:x-wiley:00168025:GPR82:GPR_82_mu1" location="equation/GPR_82_mu1.gif"/〉 in gravity surveys is pointed out.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01134.x
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    FOREWORD (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01127.x
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    UNE REGLE POUR LES CALCULS DE SISMIQUE-REFRACTION (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 1 (1953), S. 0 
    Details
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: A ruler has been constructed to solve seismic refraction problems with horizontal or slightly inclined layers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2478.1953.tb01131.x
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