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Mesure in-situ des modalités de propagation des ondes longitudinales ultra-sonores dans les sédiments marins: application à la détermination des paramètres mécaniques et physiques de ces sédiments
OLR(1979)26(12)
775
C. SUBMARINE GEOLOGY AND GEOPHYSICS
1. Apparatus and methods 79:5964 Lambeck, Kurt, 1979. Methods and geophysical applications of satellite geodesy, (Review.) Repts Prog. Phys., 42(4): 547-628. Satellite tracking methods and geodetic procedures are reviewed with an emphasis on solid Earth geophysical applications. Determinations of lateral density variations, stress state and dynamic mantle processes can be derived from the inferred gravity field; global elastic and anelastic parameters can be estimated from reconstruction of tidal forces: global measures of mass and momentum shifts in the oceans, atmosphere and whole Earth can be derived from precise rotational information. Potential future developments in satellite techniques are considered as well as the use of other space techniques. Includes ca. 175 references. Research School of Earth Sciences, Australian National University, Canberra, Australia. (rio) 79:5965 Longuemard, J. P., 1978. Mesure in-situ des modalit,s de propagation des ondes Iongitudinales ultra-sonores dans les s~diments marins: application a la d~termination des parametres m~caniques et physiques de ces s~diments. [ln-situ measurements of the modes of propagation of ultrasonic longitudinal waves in marine sediments: determining the mechanical and physical properties of sediments.] Annls hydrogr., (5)6(2)(749): 3-17. A very accurate celerimeter yields in-situ acoustic data such as velocities, attenuation and frequencies. Correlations between ultrasonic results and geophysical characteristics of sediments are considered. Centre de Recherches de S~dimentologie Marine, Centre Universitaire de Perpignan, Perpignan, France. (rio) 79:5966 Morris, W. A., P. W. Schmidt and J. L. Roy, 1979. A graphical approach to polar paths: paleomagnetic cycles and global tectonics. Phys. Earth planet. Interiors, 19(1): 85-99. An alternative to the 'minimum polar distance' method of reconstructing Precambrian pole paths is presented. The new technique takes a less restrictive approach by including all available Precambrian and
Paleozoic data. Cycles of pole motion are empiricallv defined for the Cambrian-Devonian and 750-1000 Ma periods, with similar 250 Ma cycles traced back to 2500 Ma. Possible geological implications of the cyclical pole motions are considered. Geomagnetic Laboratory, Earth Physics Branch, E.M.R., Ottawa, Ontario, Canada. (rio)
79:5967 Shaub, Yu. B., 1978. Study of the structure of the ocean bottom by the long cable method. Phys. solid Earth (a translation of Fiz. Zemli), 14(3): 231-234. The feasibility of using active electromagnetic techniques, with frequencies of a few Hertz or less, to study ocean bottom structure is demonstrated bv calculations. Energy transfer over the relatively highresistance layer of oceanic crustal rocks is the major factor in obtaining data on the geoelectrical cross section. (rio)
79:5968 Wintle, A. G. and D. J. Huntley, 1979. Thermoluminescenee dating of a deep-sea sediment core. Nature, Lond., 279(5715): 710-712. Last exposure to sunlight can provide the necessarv reference point in dating deep-sea core sediments bv thermoluminescence. This method yields dates that are in agreement with those obtained by other dating techniques. Physics Department, Simon Fraser University, Burnaby, British Columbia, Canada V5A 156. (rio)
2. Areas phology
of
characteristic
geomor-
79:5969 Selley, R. C., 1979. Dipmeter and log motifs in North Sea submarine-fan sands. Am. Ass. Petrol. Geol. Bull., 63(6): 905-917. Submarine-fan deposits can be characterized by a series of dipmeter and other wireline log motifs, and reservoir geometries and orientations can be predicted. P.O. Box 12, Dorking, Surrey RH4 3BW, United Kingdom. (dme)
775
C. SUBMARINE GEOLOGY AND GEOPHYSICS
1. Apparatus and methods 79:5964 Lambeck, Kurt, 1979. Methods and geophysical applications of satellite geodesy, (Review.) Repts Prog. Phys., 42(4): 547-628. Satellite tracking methods and geodetic procedures are reviewed with an emphasis on solid Earth geophysical applications. Determinations of lateral density variations, stress state and dynamic mantle processes can be derived from the inferred gravity field; global elastic and anelastic parameters can be estimated from reconstruction of tidal forces: global measures of mass and momentum shifts in the oceans, atmosphere and whole Earth can be derived from precise rotational information. Potential future developments in satellite techniques are considered as well as the use of other space techniques. Includes ca. 175 references. Research School of Earth Sciences, Australian National University, Canberra, Australia. (rio) 79:5965 Longuemard, J. P., 1978. Mesure in-situ des modalit,s de propagation des ondes Iongitudinales ultra-sonores dans les s~diments marins: application a la d~termination des parametres m~caniques et physiques de ces s~diments. [ln-situ measurements of the modes of propagation of ultrasonic longitudinal waves in marine sediments: determining the mechanical and physical properties of sediments.] Annls hydrogr., (5)6(2)(749): 3-17. A very accurate celerimeter yields in-situ acoustic data such as velocities, attenuation and frequencies. Correlations between ultrasonic results and geophysical characteristics of sediments are considered. Centre de Recherches de S~dimentologie Marine, Centre Universitaire de Perpignan, Perpignan, France. (rio) 79:5966 Morris, W. A., P. W. Schmidt and J. L. Roy, 1979. A graphical approach to polar paths: paleomagnetic cycles and global tectonics. Phys. Earth planet. Interiors, 19(1): 85-99. An alternative to the 'minimum polar distance' method of reconstructing Precambrian pole paths is presented. The new technique takes a less restrictive approach by including all available Precambrian and
Paleozoic data. Cycles of pole motion are empiricallv defined for the Cambrian-Devonian and 750-1000 Ma periods, with similar 250 Ma cycles traced back to 2500 Ma. Possible geological implications of the cyclical pole motions are considered. Geomagnetic Laboratory, Earth Physics Branch, E.M.R., Ottawa, Ontario, Canada. (rio)
79:5967 Shaub, Yu. B., 1978. Study of the structure of the ocean bottom by the long cable method. Phys. solid Earth (a translation of Fiz. Zemli), 14(3): 231-234. The feasibility of using active electromagnetic techniques, with frequencies of a few Hertz or less, to study ocean bottom structure is demonstrated bv calculations. Energy transfer over the relatively highresistance layer of oceanic crustal rocks is the major factor in obtaining data on the geoelectrical cross section. (rio)
79:5968 Wintle, A. G. and D. J. Huntley, 1979. Thermoluminescenee dating of a deep-sea sediment core. Nature, Lond., 279(5715): 710-712. Last exposure to sunlight can provide the necessarv reference point in dating deep-sea core sediments bv thermoluminescence. This method yields dates that are in agreement with those obtained by other dating techniques. Physics Department, Simon Fraser University, Burnaby, British Columbia, Canada V5A 156. (rio)
2. Areas phology
of
characteristic
geomor-
79:5969 Selley, R. C., 1979. Dipmeter and log motifs in North Sea submarine-fan sands. Am. Ass. Petrol. Geol. Bull., 63(6): 905-917. Submarine-fan deposits can be characterized by a series of dipmeter and other wireline log motifs, and reservoir geometries and orientations can be predicted. P.O. Box 12, Dorking, Surrey RH4 3BW, United Kingdom. (dme)