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  • Other Sources  (27)
  • 1975-1979  (18)
  • 1970-1974  (9)
  • 1
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    An event-recording system for monitoring small earthquakes (1974)
    In:  Bull. Seism. Soc. Am., Luxembourg, EGS-Gauthier-Villars, vol. 64, no. 3-4, pp. 1181-1188, pp. 2214
    Details
    Publication Date: 1974
    Keywords: Detectors ; BSSA
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Tectonic stress in the plates (1979)
    In:  Rev. Geophys. Space Phys., Luxembourg, National Academy of Sciences of the USA, vol. 17, no. 6, pp. 981-1019, pp. B05311, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Stress ; Plate tectonics ; Review article ; Tectonics
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    Vertical movement in mare basins: Relation to mare emplacement, basin tectonics, and lunar thermal history (1979)
    In:  J. Geophys. Res., Warszawa, Polish Geothermal Association, vol. 84, no. 7, pp. 1667-1682, pp. B05406, (ISSN: 1340-4202)
    Details
    Publication Date: 1979
    Keywords: Stress ; Elasticity ; Planetology ; Tectonics ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 4
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    North America-Eurasian plate boundary in northeast Asia (1976)
    In:  J. Geophys. Res., Warszawa, Conseil de l'Europe, vol. 81, no. 2, pp. 921-930, pp. L19608, (ISBN: 0-12-018847-3)
    Details
    Publication Date: 1976
    Keywords: Plate tectonics ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 5
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    Apparent stress and stress drop for intraplate earthquakes and tectonic stress in the plates (1977)
    In:  Pageoph, Luxembourg, National Academy of Sciences of the USA, vol. 115, no. 6, pp. 317-332, pp. B05311, (ISSN: 1340-4202)
    Details
    Publication Date: 1977
    Keywords: Seismology ; Stress ; Stress drop ; Tectonics
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    BIBLIOGRAPHY SEISMOLOGY
  • 6
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    Thermal history and evolution of the moon. (1973)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: In this work, theoretical lunar temperature models are computed taking into account different initial conditions to represent possible accretion models and various abundances of heat sources to correspond to different compositions. Differentiation and convection are simulated in the numerical computational scheme. Models of the thermal evolution of the moon that fit the chronology of igneous activity on the lunar surface, the stress history of the lunar lithosphere implied by the presence of mascons, and the surface concentrations of radioactive elements, involve extensive differentiation early in lunar history. This differentiation may be the result of rapid accretion and large-scale melting or of primary chemical layering during accretion. Differences in present-day temperatures for these two possibilities are significant only in the inner 1000 km of the moon and are not resolvable with presently available data.
    Keywords: SPACE SCIENCES
    Type: The Moon; 7; May-June
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    NASA TECHNICAL REPORTS
  • 7
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    Thermal evolution of the moon. (1972)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: The thermal history and current state of the lunar interior are investigated using constraints imposed by recent geological and physical data. Theoretical temperature models are computed taking into account different initial conditions, heat sources, differentiation and simulated convection. To account for the early formation of the lunar highlands, the time duration of magmatism and present-day temperatures estimated from lunar electrical conductivity profiles, it is necessary to restrict initial temperatures and abundances of radioactive elements. Successful models require that the outer half of the moon initially heated to melting temperatures, probably due to rapid accretion. Differentiation of radioactive heat sources toward the lunar surface occurred during the first 1.6 billion years. Temperatures in the outer 500 km are currently low, while the deep interior (radius less than 700 to 1000 km) is warmer than 1000 C, and is of primordial material.
    Keywords: SPACE SCIENCES
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    NASA TECHNICAL REPORTS
  • 8
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    The relationship between crustal tectonics and internal evolution in the moon and Mercury (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The relationship between crustal tectonics and thermal evolution is discussed in terms of the moon and Mercury. Finite strain theory and depth and temperature-dependent thermal expansion are used to evaluate previous conclusions about early lunar history. Factors bringing about core differentiation in the first 0.6 b.y. of Mercurian evolution are described. The influence of concentrating radioactive heat sources located in Mercury's crust on the predicted contraction is outlined. The predicted planetary volume change is explored with regard to quantitative limits on the extent of Mercurian core solidification. Lunar and Mercurian thermal stresses involved in thermal evolution are reviewed, noting the history of surface volcanism. It is concluded that surface faulting and volcanism are closely associated with the thermal evolution of the whole planetary volume. As the planet cools or is heated, several types of tectonic and volcanic effects may be produced by thermal stress occurring in the lithosphere.
    Keywords: LUNAR AND PLANETARY EXPLORATION
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    NASA TECHNICAL REPORTS
  • 9
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    Structure of the moon (1974)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: Seismic data fron the four stations of the Apollo passive seismic network have been analyzed to obtain the velocity structure of the moon. Analysis of body wave phases from artificial impacts of known impact time and position yields a crustal section. In the Mare Cognitum region the crust is about 60 km thick and is layered. In the 20-km-thick upper layer, velocity gradients are high and microcracks may play an important role. The 40-km-thick lower layer has a nearly constant 6.8-km/sec velocity. There may be a thin high-velocity layer present beneath the crust. The determination of seismic velocities in the lunar mantle is attempted by using natural impacts and deep moonquakes. The simplest model that can be proposed for the mantle consists of a 'lithosphere' overlying an 'asthenosphere'.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Reviews of Geophysics and Space Physics; 12; Nov. 197
    Format: text
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  • 10
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    Mercury - Internal structure and thermal evolution (1974)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: Mercury's thermal evolution and internal structure are modeled based on the planet's gross physical properties (which imply a high metallic iron content) and predictions for its chemistry made from the Lewis-Cameron model of condensation of the primitive solar nebula (which implies that Mercury may be composed only of those materials that condensed at temperatures near that of metallic iron condensation in the cooling nebula). Various heat sources, initial temperatures, and thermal conductivities are considered for a homogeneous model and a differentiated two-layer model. Density distributions are calculated from the mean density and estimates of the present-day temperature. The moment of inertia and the hydrostatic value of the second degree harmonic coefficient of Mercury's gravity field are found for the differentiated and undifferentiated models. These results should be useful for preliminary interpretation of the Mariner 10 measurements of Mercury's gravitational field.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Icarus; 23; Oct. 197
    Format: text
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