71 |
Percolation characteristics of various sedimentsBiegler, Norman William January 2011 (has links)
Typescript, etc. / Digitized by Kansas State University Libraries
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72 |
Aspects of Pleistocene glaciomarine sequences in the North SeaBent, Alistair John Alexander January 1986 (has links)
No description available.
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73 |
Some aspects of optically stimulated luminescence for sediment datingShort, Michael Anthony. January 1993 (has links)
published_or_final_version / Radioisotope / Master / Master of Philosophy
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74 |
Shear wave attenuation in unconsolidated laboratory sedimentsBrunson, Burlie A. 23 June 1983 (has links)
Shear wave attenuation measurements were made
using ceramic bimorph transducers to excite transverse
vibrations in a cylindrical column of unconsolidated
sediment. Three different water-saturated
sediments were used in an attempt to determine the
effects of grain shape and sorting on the frequency
dependence of attenuation. The mean grain size of the
sediments was held constant while the grain shape and
size distributions were varied. The sediment assemblages
used in the attenuation measurements included
a moderately-sorted angular quartz sand, a well-sorted
angular quartz sand, and well-sorted spherical
glass beads. The moderately-sorted sand showed the
greatest attenuation over the measurement frequency
range of 1 to 20 kHz. The well-sorted sand and the
glass beads showed generally lower attenuation with
the beads being the least lossy propagation medium.
All three sediments showed evidence of viscous attenuation
due to fluid-to-grain relative motion. This
mechanism leads to a non-linear relationship between
attenuation and frequency.
Sediment physical properties were measured for
use as inputs to a theoretical attenuation model based
on the Biot theory of propagation of waves in porous
media. The model allowed attenuation versus frequency
predictions to be made for each of the three sediment
assemblages. The resultant comparisons between the
measured and predicted attenuations demonstrated the
importance of using measured model inputs obtained
under controlled laboratory conditions when theoretical
model capabilities are being evaluated. The model
comparison shed significant light on the ability of
this particular model to predict shear wave attenuation
in non-ideal sediments. / Graduation date: 1984
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75 |
Elemental distributions in the components of metalliferous sediments from the Bauer and Roggeveen Basins - Nazca PlateLopez, Carlos 19 September 1977 (has links)
Major and trace element analyses were made on biogenic carbonate,
silica, and fish debris and on authigenic philhipsite, micronodules, and
yellow and brown aggregates recovered from Bauer and Roggeveen Basin
metalliferous sediments. Phase components and the bulk samples were
analyzed by INAA and MS methods. Leachates and residues from ammonium
oxalate and mild HC1 leaches of bulk and fine sediment fractions were
also analyzed. The mild acid leach removed fish debris and carbonate,
and the oxalate leach dissolved the micronodule phase. Sediments of the
Bauer and Roggeveen Basins differ in bulk composition, yet respond to
various chemical treatments in similar manner. I interpret this as indicative
of a close similarity in the mineralogy of these two areas.
An iron-rich smectite, manganese micronodules, and fish debris
dominate the sediment compositions of both basins. The smectite phase
concentrates Fe, Si, and Al. Manganese, Co, Ni, Ce, and W are concentrated
in the micronodule phase and Ca, Sc, and the lanthanides predominantly
in the fish debris component. The trace elements Cu, Zn, As, and
Sb are distributed in a complex manner among the three principal phases.
Barium, and some Al and Fe, may be present in small quantities of barite,
feldspars, and goethite, respectively. Silica, carbonate, and phillipsite
phases exist in. such low concentrations that they do not contribute
significantly to the bulk composition of the sediments. The response of
the various size fractions leached indicates a uniformity of distribution
of sediment components from the coarse to the fine fractions. / Graduation date: 1978
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76 |
Gravel-bed stability and water quality variation in a lowland streamHarris, T. R. J. January 1993 (has links)
No description available.
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77 |
The evolution of coastal sand dunes in the southern isles of the Outer Hebrides of ScotlandSchwenninger, Jean-Luc January 1996 (has links)
No description available.
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78 |
Radionuclides as tracers of sediment mixing in natural and enclosed estuariesWilliams, Mark Steven January 2002 (has links)
No description available.
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79 |
An investigation of factors influencing the concentration of trace metals in the bottom sediments of the Forth estuaryKershaw, P. J. January 1980 (has links)
No description available.
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80 |
Oligocene and Miocene sedimentology in the southeastern part of the Malay Basin, offshore west MalaysiaRamli, N. January 1986 (has links)
No description available.
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