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  • LUNAR AND PLANETARY EXPLORATION  (5)
  • Stress
  • 1990-1994  (6)
  • 1
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    The precursor of instability for nonlinear systems and its application to earthquake prediction - the load-unload response ratio theory (1994)
    American Geophysical Union
    In:  Professional Paper, Open-File Rept., Nonlinear Dynamics and Predictability of Geophysical Phenomena, Washington, American Geophysical Union, vol. 4, no. 2, pp. 55-60, (ISBN 0080419208)
    Details
    Publication Date: 1994
    Keywords: Earthquake precursor: prediction research ; Non-linear effects ; Earthquake precursor: stresses ; Modelling ; Stress
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    The spatial distribution of coronae on Venus (1992)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Coronae on Venus are large, generally circular surface features that have distinctive tectonic, volcanic, and topographic expressions. They range in diameter from less than 200 km to at least 1000 km. Data from the Magellan spacecraft have now allowed complete global mapping of the spatial distribution of coronae on the planet. Unlike impact craters, which show a random (i.e., Poisson) spatial distribution, the distribution of coronae appears to be nonrandom. We investigate the distribution here in detail, and explore its implications in terms of mantle convection and surface modification processes.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Lunar and Planetary Inst., Papers Presented to the International Colloquium on Venus; p 119-120
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Spectral study of Venus global topography and geoid from Magellan and PVO data (1993)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: An analysis of newly available global harmonic models for topography and geoid on Venus was conducted. It was found that the power spectral density for Venus topography has a power law dependence on wave-number characteristic of Brown Noise, similar to what is found for the Earth. However, the Venus topography spectrum presents a rollover at lower degree (l = 3) than is observed for the Earth spectrum and has smaller amplitudes than that of the Earth's. The Venus geoid also obeys a power law relationship, at least for small values of l, but with a smaller slope and more power (for l greater than 3) than the Earth geoid.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 2: G-M; p 831-832
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Origin and thermal evolution of Mars (1993)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The thermal evolution of Mars is governed by subsolidus mantle convection beneath a thick lithosphere. Models of the interior evolution are developed by parameterizing mantle convective heat transport in terms of mantle viscosity, the superadiabatic temperature rise across the mantle and mantle heat production. Geological, geophysical, and geochemical observations of the composition and structure of the interior and of the timing of major events in Martian evolution, such as global differentiation, atmospheric outgassing and the formation of the hemispherical dichotomy and Tharsis, are used to constrain the model computations. Isotope systematics of SNC meteorites suggest core formation essentially contemporaneously with the completion of accretion. Other aspects of this investigation are discussed.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: MIT, Tectonic History of the Terrestrial Planets; 19 p
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Origin and thermal evolution of Mars (1990)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The thermal evolution of Mars is governed by subsolidus mantle convection beneath a thick lithosphere. Models of the interior evolution are developed by parameterizing mantle convective heat transport in terms of mantle viscosity, the superadiabatic temperature rise across the mantle, and mantle heat production. Geological, geophysical, and geochemical observations of the compositon and structure of the interior and of the timing of major events in Martian evolution are used to constrain the model computations. Such evolutionary events include global differentiation, atmospheric outgassing, and the formation of the hemispherical dichotomy and Tharsis. Numerical calculations of fully three-dimensional, spherical convection in a shell the size of the Martian mantle are performed to explore plausible patterns of Martian mantel convection and to relate convective features, such as plumes, to surface features, such as Tharsis. The results from the model calculations are presented.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-CR-188095 , NAS 1.26:188095
    Format: application/pdf
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  • 6
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    Origin and thermal evolution of Mars (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The thermal evolution of Mars is governed by subsolidus mantle convection beneath a thick lithosphere. Models of the interior evolution are developed by parameterizing mantle convective heat transport in terms of mantle viscosity, the superadiabatic temperature rise across the mantle, and mantle heat production. Geological, geophysical, and geochemical observations of the composition and structure of the interior and of the timing of major events in Martian evolution are used to constrain the model computations. Such evolutionary events include global differentiation, atmospheric outgassing, and the formation of the hemispherical dichotomy and Tharsis. Numerical calculations of fully three-dimensional, spherical convection in a shell the size of the Martian mantle are performed to explore plausible patterns of Martian mantel convection and to relate convective features, such as plumes, to surface features, such as Tharsis. The results from the model calculations are presented.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: In: Mars (A93-27852 09-91); p. 147-183.
    Format: text
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