Typescript / 141 leaves : ill., appendix in end pocket / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Experimental determination of the dispersion of Rayleigh waves across Australia has provided information about the earth's crust in this region. This technique is particularly useful in Australia, where in many areas the low level of natural seismicity prohibits the use of more conventional methods of investigation of the crust. / Thesis (Ph.D.)--University of Adelaide, Dept. of Physics, 1967

"September 2002" / Includes bibliographical references (leaves 200-209) / xi, 209, [51] leaves : ill. (chiefly col.), maps, plates (chiefly col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Outlines an evaluation procedure for stratigraphic trap exploration by employing sequence stratigraphy, 3D seismic data visualisation and quantitative risk analysis with case studies in an actual exploration basin. / Thesis (Ph.D.)--University of Adelaide, National Centre for Petroleum Geology and Geophysics, 2002

The southeastern United States and southeastern Australia are both intraplate regions. They are characterized topographically and geologically by low relief, Paleozoic mountain belts that parallel continental margins formed by rifting. Interestingly, there are also remarkable similarities in the seismicity of the two areas. To characterize the temporal aspects of seismicity, the recurrence relationship, log N (number of earthquakes per year) versus I_o (maximum intensity), for southeastern Australia was determined to be: log N = 3.28 - 0.61 I_o; III ≤ I_o ≤ VII Comparison with a similar relationship for the southeastern United States, log N = 3.01 - 0.59 I_o; V ≤ I_o ≤ VIII. (Bollinger, G. A., 1973) indicates that both the level of seismic activity and the distribution of earthquakes by size are comparable in the two regions. Additionally, strain release studies for the two regions, while subject to considerable uncertainty, do support that similarity. Note that the intensity X, 1886 Charleston, South Carolina, earthquake was not included in either the recurrence or strain studies. Comparison of the spatial patterns of earthquake epicenters in both regions reveals only weak correlations of the seismicity with topography or with regional geology. There is, however, no apparent correlation with major igneous outcrops or with most major through-going faults. Both regions have seismic zones that are transverse or parallel to the regional geologic trends or tectonic fabrics. The parallel zones are usually associated spatially with severely-faulted regions, suggesting a possible causal relationship. For southeastern Australia, such zones exhibit northeast-trending normal faults of Jurassic age while for the southeastern United States, there are northeast-trending Pennsylvanian-Permian thrust faults. However, no such fault concentrations are found in the transverse seismic zones. Thus, the severely-faulted Source region hypothesis does apply uniformly. Indeed, it may be that, in portions of both of these widely separated geographic regions, the seismic activity is associated with deep crustal features that have no obvious surface expression. / Master of Science

"September 2002" Includes bibliographical references (leaves 200-209) Outlines an evaluation procedure for stratigraphic trap exploration by employing sequence stratigraphy, 3D seismic data visualisation and quantitative risk analysis with case studies in an actual exploration basin.