Brief description
An experimental seismic survey using both refraction and reflection techniques was carried out in April, 1958, near Morwell in the Latrobe Valley at the request of the State Electricity Commission of Victoria. The object of the survey was to find if the method was of value in mapping the structure of the coal measures of the Latrobe Valley and in providing information on the depth to and type of basement underlying the coal measures.Work was concentrated in an area south-west of Morwell on the southern limb of the Latrobe Syncline. The results obtained indicate that the seismic method may be applied successfully to geological problems of the Latrobe Valley and may provide useful control data for the interpretation of surface geological and gravity mapping. Various interpretations of the results are discussed and although some ambiguity exists, it might be overcome when more work is done, particularly if an accurate knowledge of the velocities of the coal easures is obtained. It has been possible by means of refraction work to map the extension of the basalt which crops out on the southern margin of the Latrobe Syncline beneath the coal measures with reasonable certainty.
Lineage
Maintenance and Update Frequency: asNeeded
Statement: Solution of the complex structural problems in the Brown Coal Measures of the Latrobe Valley by drilling is costly, particularly if it is desired to know the full extent of coal seams to, a possible depth of 3,000 feet. Gravity exploration
has been of great value in studying and drawing attention to the complexity of the geological structure. To develop a reliable interpretation of gravity results however, information about the density and thickness of the geological formations in several places throughout the basin is necessary. Drilling records have supplied a certain amount of information but no bore has penetrated the full section in the deeper parts of the basin and consequently information on the density and thickness of these does not exist.^Seismic work could possibly supply information on the depth to basement, the presence of basalt, and the thickness and structure of the coal measures, thereby saving in drilling costs and providing greater control data for the interpretation of the gravity results. The State Electricity Commission of Victoria therefore requested the Bureau to carry out the survey under discussion in this Report. The seismic survey was undertaken when it was thought advisable to delay a survey in Queensland where there had been heavy rain.^The duration of the survey was limited to three weeks, the time of the expected delay. Two traverses were planned, the
first in the Bennett's Creek area and the second between Tyers and Traralgon South.
has been of great value in studying and drawing attention to the complexity of the geological structure. To develop a reliable interpretation of gravity results however, information about the density and thickness of the geological formations in several places throughout the basin is necessary. Drilling records have supplied a certain amount of information but no bore has penetrated the full section in the deeper parts of the basin and consequently information on the density and thickness of these does not exist.^Seismic work could possibly supply information on the depth to basement, the presence of basalt, and the thickness and structure of the coal measures, thereby saving in drilling costs and providing greater control data for the interpretation of the gravity results. The State Electricity Commission of Victoria therefore requested the Bureau to carry out the survey under discussion in this Report. The seismic survey was undertaken when it was thought advisable to delay a survey in Queensland where there had been heavy rain.^The duration of the survey was limited to three weeks, the time of the expected delay. Two traverses were planned, the
first in the Bennett's Creek area and the second between Tyers and Traralgon South.
Issued: 1959
Modified: 08 04 2019
Data time period: 1956-11-01 to 1956-11-30
text: westlimit=145.5; southlimit=-39.0; eastlimit=147; northlimit=-38.0
Subjects
AU-VIC |
Earth Sciences |
Geophysics |
HVC_144637 |
Published_External |
Seismic Data seismic survey |
Seismology and Seismic Exploration |
geophysics |
geoscientificInformation |
seismic reflection |
seismic refraction |
seismic velocity |
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Identifiers
- URI : pid.geoscience.gov.au/dataset/ga/76392
- global : de769d6c-cc0e-436f-e044-00144fdd4fa6
