Browsing by Subject "Major geophysics"
Now showing items 1-20 of 23
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(Texas A&M University. Libraries, 1974)Faulted drape-folds are produced experimentally at a confining pressure of 1.0 kb, room temperature, and an axial shortening-rate of 10⁻⁴/sec by forcing a block of essentially brittle sandstone (2 by 3 by 12.6 cm) along a ...
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(Texas A&M University. Libraries, 1980)Interference effects and dissipation produce frequency selective attenuation. In a one-dimensional stratified medium the observed attenuation is a composite of the apparent attenuation arising from interference effects and ...
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(Texas A&M University. Libraries, 1995)The polarization directions of the shear waves and the time differences between shear-wave arrivals of different polarizations contain important clues to the internal structure of the medium though which the shear-waves ...
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(Texas A&M University. Libraries, 1980)Small amounts of water can have a dramatic effect on the seismic quality factor, Q; this suggests the importance of controlling the environment in which Q measurements are made. Because the effect of moisture is so large, ...
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(Texas A&M University. Libraries, 1992)The effective-medium theory for complex conductivity is known to be a useful model for describing the conductive and dielectric properties of heterogeneous media. The validity of the theory for shaly sandstones is explored ...
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(Texas A&M University. Libraries, 1967)The objective of this study was to investigate the problems associated with determining the velocity of propagation of the direct compressional and shear wave in thin layers of highway building materials using a portable ...
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(Texas A&M University. Libraries, 1993)The electrical-impedance response of brine-saturated rocks is similar to the electrical-impedance responses of other ionically conducting solids in that they all exhibit small but constant phase angles at low frequencies. ...
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(Texas A&M University. Libraries, 1989)Seismic reflection data were collected in 1981 at the In-Situ Lignite-Gasification site located near Rockdale, Texas managed by the Petroleum Engineering Department at Texas A&M University. The three zero-offset-VSP data ...
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(Texas A&M University. Libraries, 1992)An analysis of the geological and geophysical character of the Rivera-Cocos plate boundary indicates that it consists of three distinct morphotectonic zones. The easternmost zone, delineated by the El Gordo Graben, is a ...
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(Texas A&M University. Libraries, 1993)Shatsky Plateau is probably the oldest extant oceanic plateau, and is of probable Late Jurassic or Early Cretaceous age. Like most such features, however, its origin is uncertain. The plateau has been thought to have been ...
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(Texas A&M University. Libraries, 1980)Over seventy percent of the oil and gas fields found in the delta region is associated with growth faults. Recognition of this type of fault system therefore will play an important role in future petroleum exploration and ...
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(Texas A&M University. Libraries, 1991)In this research, the equations of motion of an isotropic fluid-saturated sedimentary medium are developed from first principles. The equations are limited to the case where linear stress/strain relations are adequate for ...
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(Texas A&M University. Libraries, 1986)Conventional methods for determining Poisson's ratio from full-waveform acoustic logs rely on measurement of the shear velocity. This measurement is subject to error from contamination by multiply reflected P-waves and ...
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(Texas A&M University. Libraries, 1985)In a vertical seismic profile, the earth's response to a surface excitation is measured by geophones located in a borehole. The objective of this research has been to use the recorded up and downgoing waves to estimate ...
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(Texas A&M University. Libraries, 1986)The pattern recognition method is applied to the Andean seismic region that extends from southern latitudes 2° to 27° in the South American continent, to set a criterion for the prediction of the potential sites of strong ...
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(Texas A&M University. Libraries, 1994)Geological and geophysical data from SW Japan and the adjacent regions are analyzed to determine the nature of deformation in SW Japan, and the regional tectonic framework responsible for this deformation. The relationship ...
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(Texas A&M University. Libraries, 1991)To gain insight into the rheology of selected feldspar-bearing rocks from the continental lower crust (CLC), three compositionally-diverse assemblages from exposed PreCambrian lower crustal terrains and a microgabbro have ...
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(Texas A&M University. Libraries, 1993)
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(Texas A&M University. Libraries, 1990)The cause of the Cretaceous-Tertiary (K/T) transition remains one of the most controversial scientific topics in the geosciences. Paleontologic, mineralogic, geochemical, and geophysical evidence associated with the K/T ...
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(Texas A&M University. Libraries, 1975)The motion of a phase boundary inside the Earth, caused by the application of pressure and temperature perturbations at the surface, is determined under a linear approximation. The Laplace transform is used to determine ...