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  • 1970-1974  (6)
  • 1
    Electronic Resource
    Electronic Resource
    Preliminary results of an experimental study of the magnetic effects of shocking lunar soil (1974)
    Springer
    Earth, moon and planets 9 (1974), S. 57-61 
    Details
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Preliminary shock experiments at approximately 50 and 250 kb have been carried out with lunar soil and with a dispersion of iron in quartz. The lunar soils acquire remanent magnetization in the Earth's field of order of magnitude 10−3 G cm3 g−1. The remanence exhibited considerable stability against AF demagnetization. Remanence appears to be acquired both during the passage of the shock wave through the material and during post shock cool-down. The higher shock range gave rise to an increase in magnetic viscosity and in the saturation magnetization of the soil, which is most readily explained as due to the generation of fine grained iron.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00565392
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Preliminary results of an experimental study of the magnetic effects of shocking lunar soil (1974)
    Springer
    Details
    Publication Date: 1974-01-01
    Print ISSN: 0027-0903
    Topics: Geosciences , Physics
    Published by Springer
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    PAPER CURRENT
  • 3
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    Magnetic hysteresis in natural materials (1973)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Magnetic hysteresis loops and the derived hysteresis ratios R sub H and R sub I are used to classify the various natural dilute magnetic materials. R sub I is the ratio of saturation isothermal remanence (I sub R) to saturation (I sub S) magnetization, and R sub H is the ratio of remanent coercive force (H sub R) to coercive force (H sub C). The R sub H and R sub I values depend on grain size, the characteristics of separate size modes in mixtures of grains of high and low coercivity, and the packing characteristics. Both R sub H and R sub I are affected by thermochemical alterations of the ferromagnetic fraction. Hysteresis loop constriction is observed in lunar samples, chondrite meteorites, and thermochemically altered basaltic rocks, and is due to mixtures of components of high and low coercivity. Discrete ranges of R sub H and R sub I for terrestrial and lunar samples and for chondrite meteorites provide for a classification of these natural materials based on their hysteresis properties.
    Keywords: GEOPHYSICS
    Type: Earth and Planetary Science Letters; 20; 1, Se; Sept
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Shock remagnetization associated with meteorite impact at planetary surfaces (1973)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: The stages of a cratering event are considered together with four distinct magnetization volumes, taking into account the jetted material, the ejecta, the impact melt, and shock-compressed material which remains in situ. Shock classifications are discussed along with mineralogical aspects of shock remagnetization, the behavior of iron sulfides, defect cubic spinels, ilmenite-hematite series, the Fe-Ti-O system, alloys phases, and silicates. Remagnetization mechanisms considered include a first order reversible crystallographic transition in bcc iron-nickel, a second order Curie point transition in fcc iron-nickel, shock-induced anisotropy, and shock melting of iron containing silicates. Experimental results are reported together with a hypothetical crater model.
    Keywords: SPACE SCIENCES
    Type: The Moon; 6; Mar
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Impact processes and lunar magnetism (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Progress reports are presented of work related to the magnetic characterization of lunar samples, taking into account total iron ratios, questions of hysteresis classification, aspects of normalized remanence to remanent coercivity plots, and a comparison of NRM of lunar samples with hysteresis characterization. Shock experiments on lunar soil are also considered, giving attention to the effect of shock on the magnetic characteristics of lunar soil and the acquisition of remanence during shock. Preliminary measurements of individual soil particles and of samples from the Lunar Crater are discussed.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Lunar Science Conference; Mar 18, 1974 - Mar 22, 1974; Houston, TX
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Remanent magnetization and structural effects due to shock in natural and man-made iron-nickel alloys (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Explosive shock or meteorite impact are significant remagnetization processes. The mechanisms of remagnetization associated with the dynamic processes depend on the peak shock pressure, the nature of the shocked materials, and the behavior of the shock in the material. Magnetic measurements can be used to classify products formed during a shock process, and magnetic measurements can be used to investigate the process itself because of the special characteristics of the remanent magnetization vectors. The magnetic coercive force increases more rapidly in quenched and annealed iron-nickel alloys as nickel is added than it does in the alloys which have been shocked.
    Keywords: MATERIALS, METALLIC
    Type: Conference on Metallurgical effects at high strain rates; Feb 05, 1973 - Feb 08, 1973; Albuquerque, NM
    Format: text
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