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  • 1
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    Stress accumulation and release on the San Andreas fault (1977)
    In:  Pageoph, Taipei, EGS, vol. 115, no. 2, pp. 413-427, pp. 8039, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1977
    Schlagwort(e): Fault zone ; Stress ; Geothermics ; Inelastic ; Seismicity ; Dislocation
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    BIBLIOGRAFIE SEISMOLOGIE
  • 2
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    Stress accumulation in the lithosphere (1976)
    In:  Tectonophys., Taipei, EGS, vol. 35, no. 2, pp. 183-199, pp. 8039, (ISSN: 1340-4202)
    Details
    Publikationsdatum: 1976
    Schlagwort(e): Stress ; Geothermics ; Tectonics
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    BIBLIOGRAFIE SEISMOLOGIE
  • 3
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    Models for the distribution of stress and strain adjacent to the San Andreas fault (1978)
    USGS
    In:  Proc. Conf. III, Fault Mechanics and its Relation to Earthquake Prediction, Nat. Earthq. Hazard Reduction Program, 1-3.12.1977, Los Angeles, USGS, vol. 10, no. 91-N-FA07-7-4, pp. 589-618, (ISBN 0 08 042822 3)
    Details
    Publikationsdatum: 1978
    Schlagwort(e): Fault zone ; Dislocation ; Earthquake precursor: prediction research ; Stress ; Earthquake precursor: deformation or strain ; Earthquake precursor: models ; Review article ; FROTH, ; FRUMMEL
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    BIBLIOGRAFIE SEISMOLOGIE
  • 4
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    Lithospheric instabilities (1977)
    In:  Other Sources
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    Publikationsdatum: 2019-06-27
    Beschreibung: In this paper we define a mantle geoid. This is the height that hot solid mantle rock from the asthenosphere would attain if it were not confined by the lithosphere. The mantle geoid lies 3.25 km below the hydrogeoid (sea level). Hot mantle rock cannot entirely penetrate the continental lithosphere. One consequence of this partial penetration is rifting; as a result of rifting an accreting plate margin may be created. Hot mantle rock from the asthenosphere can penetrate through the oceanic lithosphere if the sea floor lies below the mantle geoid. Penetration of the oceanic lithosphere by this solid mantle rock is a necessary condition for the initiation of subduction. We argue that the same processes that are associated with rifting in continental lithosphere will be associated with behind arc spreading and the initiation of subduction in the oceanic lithosphere.
    Schlagwort(e): GEOPHYSICS
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
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    Geoid Anomalies and the Near-Surface Dipole Distribution of Mass (1978)
    In:  CASI
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    Publikationsdatum: 2019-06-27
    Beschreibung: Although geoid or surface gravity anomalies cannot be uniquely related to an interior distribution of mass, they can be related to a surface mass distribution. However, over horizontal distances greater than about 100 km, the condition of isostatic equilibrium above the asthenosphere is a good approximation and the total mass per unit column is zero. Thus the surface distribution of mass is also zero. For this case we show that the surface gravitational potential anomaly can be uniquely related to a surface dipole distribution of mass. Variations in the thickness of the crust and lithosphere can be expected to produce undulations in the geoid.
    Schlagwort(e): GEOPHYSICS
    Materialart: Ohio State Univ. Appl. of Geodesy to Geodyn., an Intern. Symp.; p 257-260
    Format: application/pdf
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  • 6
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    Geoid anomalies and the thickness of the lithosphere (1979)
    In:  Other Sources
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    Publikationsdatum: 2019-06-27
    Beschreibung: By using accepted crustal density distributions and either error function or linear temperature distributions the difference in geoid height between stable continental areas and deep ocean basins has been determined as a function of the continental lithospheric thickness. If the continental lithosphere were greater than 200 km thick, the geoid anomaly over the continents would be systematically negative in relation to that over the ocean basins. By using the GEM 9 satellite geoid the mean geoid anomalies over ocean basins and stable continental areas have been obtained. No systematic difference between continental and oceanic geoids is observed. It is concluded that the thickness of the continental lithosphere is near 180 km. This is in good agreement with various interpretations of the surface heat flow observations.
    Schlagwort(e): GEOPHYSICS
    Materialart: Journal of Geophysical Research; 84; May 10
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
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    On isostatic geoid anomalies (1978)
    In:  Other Sources
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    Publikationsdatum: 2019-06-27
    Beschreibung: In regions of slowly varying lateral density changes, the gravity and geoid anomalies may be expressed as power series expansions in topography. Geoid anomalies in isostatically compensated regions can be directly related to the local dipole moment of the density-depth distribution. This relationship is used to obtain theoretical geoid anomalies for different models of isostatic compensation. The classical Pratt and Airy models give geoid height-elevation relationships differing in functional form but predicting geoid anomalies of comparable magnitude. The thermal cooling model explaining ocean floor subsidence away from mid-ocean ridges predicts a linear age-geoid height relationship of 0.16 m/m.y. Geos 3 altimetry profiles were examined to test these theoretical relationships. A profile over the mid-Atlantic ridge is closely matched by the geoid curve derived from the thermal cooling model. The observed geoid anomaly over the Atlantic margin of North America can be explained by Airy compensation. The relation between geoid anomaly and bathymetry across the Bermuda Swell is consistent with Pratt compensation with a 100-km depth of compensation.
    Schlagwort(e): GEOPHYSICS
    Materialart: Journal of Geophysical Research; 83; Nov. 10
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
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    On the gravitational potential and field anomalies due to thin mass layers (1977)
    In:  Other Sources
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    Publikationsdatum: 2019-06-27
    Beschreibung: The gravitational potential and field anomalies for thin mass layers are derived using the technique of matched asymptotic expansions. An inner solution is obtained using an expansion in powers of the thickness and it is shown that the outer solution is given by a surface distribution of mass sources and dipoles. Coefficients are evaluated by matching the inner expansion of the outer solution with the outer expansion of the inner solution. The leading term in the inner expansion for the normal gravitational field gives the Bouguer formula. The leading term in the expansion for the gravitational potential gives an expression for the perturbation to the geoid. The predictions given by this term are compared with measurements by satellite altimetry. The second-order terms in the expansion for the gravitational field are required to predict the gravity anomaly at a continental margin. The results are compared with observations.
    Schlagwort(e): GEOPHYSICS
    Materialart: Geophysical Journal; 48; 3, Ma; Mar. 197
    Format: text
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  • 9
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    An elastic-perfectly plastic analysis of the bending of the lithosphere at a trench (1978)
    In:  Other Sources
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    Publikationsdatum: 2019-06-27
    Beschreibung: A number of authors have modeled the flexure of the lithosphere at an oceanic trench using a thin elastic plate with a hydrostatic restoring force. In some cases good agreement with observed topography is obtained but in other cases the slope of the lithosphere within the trench is greater than that predicted by the elastic theory. In this paper the bending of a thin plate is considered using an elastic-perfectly plastic rheology. It is found that the lithosphere behaves elastically seaward of the trench, but that plasticity decreases the radius of curvature within the trench. The results are compared with a number of observed trench profiles. The elastic-perfectly plastic profiles are in excellent agreement with those profiles that deviate from elastic behavior.
    Schlagwort(e): GEOPHYSICS
    Materialart: Tectonophysics; 47; 1978
    Format: text
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