Browsing by Subject "Geophysics"
Now showing items 1-20 of 22
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Accurate RMS velocity determinations from CGP data by measuring residual NMO with an adaptive method (Texas A&M University. Libraries, 1976)Accurate root-mean-square (RMS) velocities are needed to stack a common-ground-point (CGP) gather properly, to calculate interval velocities, thickness, and dips of subsurface layers accurately, and to infer correct ...
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(Texas A&M University. Libraries, 1983)Using radar altimeter data from the GEOS-3 satellite, a characteristic geoid anomaly has been identified which occurs over all major deep-sea trenches. As one approaches the trench from the seaward side, the altimeter geoid ...
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(2018-05-04)Electromagnetic induction (EMI) methods have long been used to explore and analyze near-surface geological and hydrological components of coastal systems. However, there have been few studies that use EMI to analyze the ...
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(Texas A&M University. Libraries, 1984)Detection of geologic discontinuities ahead of the mining process has been attempted by both electromagnetic and acoustic methods. Rock salt is an ideal medium for the propagation of electromagnetic waves. However, in cases ...
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(Texas A&M University. Libraries, 1975)The corrective gradient projection (CGP) method is described for the problem of optimizing a non-linear function (called the objective function) of multiple parameters subject to a system of linear constraint equations. ...
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(Texas A&M University. Libraries, 1977)Although a qualitative understanding of the fracture of rocks has been acquired, quantitative models are still inadequate. The construction of a predictive model of the brittle deformation of crystalline rocks requires ...
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(Texas A&M University. Libraries, 1978)The major thrust of this dissertation is the development, field testing, and theoretical evaluation of a high frequency (HF) radar system for use in probing rock salt where very-high frequency (VHF) radars have failed. The ...
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(Texas A&M University. Libraries, 1962)A series of copper-exchanged Y zeolites with exchange levels of 2.9, 4.3, 17, 25, 41, 55 and 75% have been examined using electron paramagnetic resonance (epr) and infrared (ir) spectroscopy. In the dehydrated CuY - 2.9, ...
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(Texas A&M University. Libraries, 1976)I have reexamined the treatise by Gilbert (1877) on laccoliths, using an interplay between current geophysical methods of investigating geologic structures, and presently available finite element methods of modeling ...
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(2016-08-04)Understanding how an individual cognizes and processes geophysical information pertinent to natural hazards can further enhance geophysical imaging in becoming more reliable and beneficial to the public. It has long been ...
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(2014-08-11)Sandstone facies are good reservoirs for the accumulation of hydrocarbons in conventional exploration due to high porosity and permeability. Grain size variations within a sandstone reservoir can range from pebbles to ...
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(Texas A&M University. Libraries, 1985)The influence of material anisotropy (transverse isotropy) on half-plane surface tilt and displacement fields induced by a near-surface crack under uniform pressure or shear is investigated by solving a series of boundary ...
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(Texas A&M University. Libraries, 1970)The temperature and pressure regime at the Mohorovicic discontinuity is developed for four specific geographic areas in the Central Stable Region of the United States by detailed geophysical crustal modeling in these areas. ...
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(2013-09-30)ABSTRACT Multisensor Geophysical Fusion for Improved Sub-surface Imaging at Camptown Cemetery, Brenham, Texas. (May 2014) Tate Gregory Meehan Department of Geology and Geophysics Texas A&M University Research Advisor: ...
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(2015-09-22)The Henry Mountains in Utah are home to several small igneous intrusions from the Late Oligocene to Early Miocene. One of the most critical small satellite bodies to the main intrusions of the Henry Mountains is the Trachyte ...
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(2013-04-24)Shatsky Rise is oceanic plateau in the northwest part of the Pacific Ocean, and the formation of Shatsky Rise is poorly known. To get a better understanding of the formation Integrated Ocean Drilling Program (IODP) Expedition ...
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(Texas A&M University. Libraries, 1976)Previous experimental folding of single beams of Indiana limestone provides stress-strain curves ana evidence of buckling instability. These experimental results provide the general information needed to make incremental ...
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(Texas A&M University. Libraries, 1981)Accurate estimates of the range-of-error of root-mean-square velocities (VRMS) and interval velocities (VINT) derived from conventional CDP seismic data acquired in deep-water ocean basins can be obtained routinely, provided ...
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(Texas A&M University. Libraries, 1975)The major thrust of this dissertation was to test an original method for resolving the current system associated with polar magnetic substorms from ground based magnetic observations. This method is based on a general ...
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(2017-07-21)From its discovery in 1921, the Odessa Meteorite Crater has interested researchers and mining companies who had initially hoped to locate a buried mass of meteoric iron. To find the impactor, a major geologic study of the ...