Geophysical data processing and interpretation in an area of complex structure — the southern Taranaki Boundary Fault Zone

J. I. Montalbetti; D. J. Norris

doi:10.1071/EG991271

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

Geophysical data processing and interpretation in an area of complex structure — the southern Taranaki Boundary Fault Zone
Authors J. I. Montalbetti^a and D. J. Norris^a
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^a TCPL Resources Ltd, 4th Floor, 495 Victoria Avenue Chatswood, , NSW, 2067
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 22, Issue 2, Jun 1991, p. 271 - 276
DOI: https://doi.org/10.1071/EG991271
- Published online: 01 Jun 1991

Abstract

During 1989, a closely spaced offshore seismic grid was acquired over an area of thrust faulting along the Taranaki Boundary Fault Zone, New Zealand, and complemented by simultaneous gravity recording along a number of profiles.

Production seismic data processing included DMO and steep dip migration. Subsequent reprocessing of selected lines with full prestack time migration improved the imaging in the zone of complex structuring.

Integrated interpretation of the seismic and gravity data developed a model for the geometry of the Taranaki Boundary Fault in this region. From north to south, the structural style is shown to change from low to high angle overthrusting of Mesozoic basement with truncation of the (younger) sediments against the basement.

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References

Bulte, G. A., (1988). ‘Styles of compressional wrench faulting Taranaki Basin, New Zealand’. J. S. Am. Earth Sci, 1/3, 79-91.
Deregowski, S. M., (1990). ‘Common-offset migrations and velocity analysis’. First Break, 25, 225-259.
Gazdag, J., and Sguazzero, P., (1984). ‘Migration of seismic data by phase shift plus interpolation’. Geophysics, 49, 124-131.
Knox, G. J., (1982). ‘Taranaki Basin, structural style and setting’. NZ J. Geol. Geophys., 25, 125-140.
Schmidt, D. S., and Robinson, P. H., (in press). ‘The structural setting and depositional history for the Kupe South field, Taranaki Basin’. 1989 New Zealand Oil Exploration Conference, September 1989.
Stern, T A., and Davey F. J., (1989). ‘Crustal structure and origin of basins formed behind the Hikurangi subduction zone, New Zealand’. Am. Geophys. Union, Geophysical Monograph 48, 73-85.

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Article Type: Research Article

Keyword(s): gravity; interpretation; New Zealand; seismic data processing; Taranaki Fault Zone

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Geophysical data processing and interpretation in an area of complex structure — the southern Taranaki Boundary Fault Zone

Abstract

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