Geophysics
Dr James Cull
12 points * 10 hours per week * Second semester * Clayton * Prerequisites: GPS3011 and 8 to 16 points of second-year mathematics
Consists of the units exploration geophysics (electrical) and exploration geophysics (seismic). A third-year geology unit may be substituted for one of these units, unless such a substitution has previously been made in GPS3011.
Assessment
Examinations (3 hours): 65% * Practical work: 35%
Course units
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Global geophysics
First semester
This unit examines the Earth's physical properties and our methods of measuring them on a global scale. Topics covered include global seismology and the internal structure of the Earth, earthquakes, thermal evolution of the Earth, plate tectonics and the physical properties of lithosphere and mantle, elastic flexure of the lithosphere, post-glacial uplift and earth rotation.
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Regional geophysics
First semester
Methods for gathering, processing and interpreting gravity; magnetic and radiometric data are presented with geological constraints for regional mapping and ground selection. This subject is completed with an introduction to image processing techniques for anomaly recognition and trend analysis.
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Geophysical exploration (electrical)
Normally second semester
Mineral exploration techniques are presented based on the conductive and inductive behaviour of buried ore bodies, as revealed by resistivity, spontaneous and induced polarisation, as well as time domain and frequency domain electromagnetic response. This unit will include basic theory, field techniques, computer-aided interpretation, and petrophysical properties of mineral bearing zones.
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Geophysical exploration (seismic)
Second semester * Melbourne University
This unit contains an introduction to applied seismology, including a physical and mathematical treatment of seismic wave propagation, the seismic refraction method, well logging and seismic reflection imaging. Variations in structure and evolution of sedimentary basins will be described as an aid to interpretation.
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Field excursion
A compulsory week-long field excursion will take place either during the mid-year vacation or the mid-semester break in second semester. Students should check dates at enrolment to avoid clashes. A range of field equipment will be used to carry out an integrated geophysical survey in northern Victoria. Students will also carry out a detailed interpretation of data gathered in the field using Earth Sciences computer facilities.