A Long-Offset Seismic Reflection and Refraction Study of the Gippsland and Bass Basins from Onshore Recording of a Marine Air-Gun Source

C. D. N. Collins; J. P. Cull; J. P. Willcox; J. P. Colwell

doi:10.1071/EG989293

ISSN: 0812-3985
E-ISSN: 1834-7533

A Long-Offset Seismic Reflection and Refraction Study of the Gippsland and Bass Basins from Onshore Recording of a Marine Air-Gun Source
Authors C. D. N. Collins^a, J. P. Cull^b, J. P. Willcox^c and J. P. Colwell^c
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^a Bureau of Mineral Resources, P.O. Box 378 Canberra City, ACT, 2601 ^b Dept. of Earth Sciences Monash Universit, , y Clayton, VIC, . 3168 ^c Bureau of Mineral Resources, RO. Box 378 Canberra City, ACT, 2601
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 20, Issue 1-2, Mar 1989, p. 293 - 295
DOI: https://doi.org/10.1071/EG989293
- Published online: 01 Mar 1989

Abstract

Seismic refraction data were obtained for the Bass and Gippsland Basins during the 1988 cruise of the BMR research vessell“Rig Seismic”. Seismic recorders were deployed on land by BMR and Monash University to record long-offset wide-angle reflection and refraction data using the ship’s air-guns as the energy source. Preliminary results have now been obtained from these data providing information on deep crustal structure related to the basin formation. Two crustal layers have been detected with velocities of 4.5 km/s increasing to 7.4 km/s (unreversed) at depths exceeding 20 km.

Additional data have now been obtained over a traverse length of 170 km to provide constraints on the deep structure of Bass Strait and the Lachlan Fold Belt in Victoria and Tasmania.

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References

Etheridge, M. A., Branson, J. C, and Stuart-Smith, P. G. (1985), ‘Extensional basin-forming structures in the Bass Strait and their importance for hydrocarbon exploration’, J.Aust.Petrol.Explor. Assoc, 25, 344-361.
Finlayson, D. M., and McCracken, H. M. (1981), ‘Crustal structure under the Sydney Basin and Lachlan Fold Belt determined from explosion seismic studies’, J.Geol.Soc.Aust., 28, 177-190.
Gibson, G., Wesson, V., and Cuthbertson, R. (1981), ‘Seismicity of Victoria to 1980’, J.Geol.Soc.Aust., 28, 341-356.
Jokat, W., and Flueh, E. R. (1987), ‘On the use of air-gun arrays for seismic refraction investigations of the crust’, First Break, 5, 440-447.
McKenzie, D. P. (1978), ‘Some remarks on the development of sedimentary basins’, Earth and Planetary Science Letters, 40, 25-32.
Underwood, R. (1969), ‘A seismic refraction study of the crust and upper mantle in the vicinity of Bass Strait’, Aust.J.Phys., 22, 573-587.
Wernicke, B. (1985), ‘Uniform-sense normal simple shear of the continental lithosphere’, Can.J.Earth Sci., 22, 108-125.

/content/journals/10.1071/EG989293

Article Type: Research Article

Keyword(s): air-gun arrays; Bass/Gippsland basins; Detachment models; refraction; seismic reflection

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A Long-Offset Seismic Reflection and Refraction Study of the Gippsland and Bass Basins from Onshore Recording of a Marine Air-Gun Source

Abstract

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