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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/3684

Title: Source mechanisms of mining-related seismic events in the Far West Rand, South Africa
Authors: Kassa, BB
Julia, J
Nyblade, AA
Durrheim, RJ
Keywords: Seismics
Far West Rand
South Africa
Mines
Source mechanisms
Tensor inversion
Witwatersrand basin
Savuka mine
Geophysics
Tautona mine
Mponeng mine
Issue Date: Sep-2009
Publisher: South African Geophysical Association
Citation: Kassa, BB, Julia, J, Nyblade, AA and Durrheim, RJ. 2009. Source mechanisms of mining-related seismic events in the Far West Rand, South Africa. 11th South African Geophysical Association Biennial Technical Meeting and Exhibition, Swaziland, 16-18 September 2009, pp 69-72
Abstract: The Far West Rand mining district is known for its deep gold mines and the associated high levels of seismic activity. Thousands of tremors are recorded every day by geophones installed in the mine workings. These events range in total magnitude ML from -1 to 4. Some of the biggest events (ML>3) are external to the network deployed on a single mine. Researchers combine data from three mines (Savuke, Tautona and Mponeng) to improve the location of these events. Source mechanisms were calculated by minimizing the L2 norm of the difference between the observed and predicted P, SV and SH spectral amplitudes, with visually assigned polarities. The preliminary results from the Savuka mine show that the major principal stress is compressional, oriented near to the vertical, and with a significant isotropic component in the moment tensor solution.
Description: 11th South African Geophysical Association Biennial Technical Meeting and Exhibition, Swaziland, 16-18 September 2009
URI: http://hdl.handle.net/10204/3684
ISBN: 9780620446020
Appears in Collections:Mining and geoscience
General science, engineering & technology

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