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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/6139

Title: Application of 3D seismic techniques to evaluate ore resources in the West Wits Line goldfield and portions of the West Rand goldfield, South Africa
Authors: Manzi, MSD
Gibson, MAS
Hein, KAA
King, N
Durrheim, RJ
Keywords: 3D seismic techniques
Mining techniques
Goldfield mines
Ore resources
3D seismic data
Issue Date: Sep-2012
Publisher: GeoScienceWorld
Citation: Manzi, MSD. Gibson, MAS, Hein, KAA, King, N and Durrheim, RJ. 2012. Application of 3D seismic techniques to evaluate ore resources in the West Wits Line goldfield and portions of the West Rand goldfield, South Africa. Geophysics, vol. 77(5), WC163-WC171, DOI: 10.1190/GEO2012-0133.1
Series/Report no.: Workflow;9516
Abstract: As expensive as 3D seismic reflection surveys are, their high cost is justified by improved imaging of certain ore horizons in some of the Witwatersrand basin gold mines. The merged historical 3D seismic reflection data acquired for Kloof and South Deep mines forms an integral part of their Ventersdorp Contact Reef mine planning and development programme. The recent advances in 3D seismic technology have motivated the reprocessing and reinterpretation of the old data sets using the latest algorithms, therefore significantly increasing the signal-to-noise ratio of the data. In particular, the prestack time migration technique has provided better stratigraphic and structural imaging in complex faulted areas, such as the Witwatersrand basin, relative to older poststack migration methods. Interpretation tools such as seismic attributes have been used to identify a number of subtle geologic structures that have direct impact on ore resource evaluation. Other improvements include more accurate mapping of the depths, dip, and strike of the key seismic horizons and auriferous reefs, yielding a better understanding of the interrelationship between fault activity and reef distribution, and the relative chronology of tectonic events. The 3D seismic data, when integrated with underground mapping and borehole data, provide better imaging and modeling of critical major fault systems and zones of reef loss. Many faults resolve as multifault segments that bound unmined blocks leading to the discovery and delineation of resources in faulted areas of the mines.
Description: Copyright: 2012 Society of Exploration Geophysicists
URI: http://geophysics.geoscienceworld.org/content/77/5/WC163.full
http://hdl.handle.net/10204/6139
ISSN: 0016-8033
Appears in Collections:Mining and geoscience
General science, engineering & technology

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