Imaging Steep Dips: Examples from Australian seismic surveys  

Authors / CoAuthors

Jones, L.E.A.

Abstract

Steeply dipping reflectors have been recognised on stack data for the Lachlan Fold Belt (up to 60º) and the Tanami Province (up to 70º), demonstrating that significant dip filtering does not occur during acquisition with regional parameters. DMO correction is essential during processing to correctly image such features. These events appear to be real reflections not reflected refractions or diffractions, as proved by analysis of amplitude, frequency and moveout on shot records. In the Tanami case, the reflection is related to a small circular feature in the potential field image, possibly the expression of a granite stock. Migration proved problematical, as most migration algorithms could not simultaneously migrate the steep dips and remain artefact free in other parts of the section, suggesting that interpretation must be done on multiple sections in such cases.

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nonGeographicDataset

eCat Id

64785

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Keywords

• External PublicationAbstract

( Theme )

• seismology

( Theme )

• seismic sections

• AU

Australian and New Zealand Standard Research Classification (ANZSRC)

• Earth Sciences

• Published_Internal

Publication Date

2006-01-01T00:00:00

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Australian Government Security ClassificationSystem    

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Creative Commons Attribution 4.0 International Licence    

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unknown

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geoscientificInformation

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Unknown

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[-35.0, -19.0, 127.0, 150.0]

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