Antinuclear

Australian news, and some related international items

An Olympic sized earthquake danger

the EIS Study Team is not competent to evaluate seismic risk. The EIS Study Team did not include any geophysicists – it is essential that the EIS be approved by seismologists,

EARTHQUAKE WARNINGS – SOUTH AUSTRALIANS WAITING FOR THE BIG ONE April 18, 2010 by Coober Pedy Regional Times“.……in 2004 Sandra Kanck, Leader of the South Australian Democrats and Member of the Legislative Council warned that the earthquake risk was too high for the proposed nuclear waste dump at Woomera in South Australia’s Far North……

OLYMPIC DAM: Mashers Fault Mashers Fault and the Seismicity Anticipated to be Stimulated by the Proposed Open Pit Mine at Olympic Dam, By: Edward Cranswick, Geophysicist,


Abstract: The proposed excavation at Olympic Dam of one of the largest open pit mines on Earth, 4.1 km long, 3.5 km wide, 1 km deep, at a bend in the steeply dipping, 35-km-long Mashers Fault, and the associated perturbation of the local groundwater pore pressures in a region of horizontal compressive stress would most likely stimulate local seismicity.
Faulting, perhaps related to variations of pore pressure, has occurred intermittently on structures in Australia that are difficult to recognise, and open pit mines have caused earthquakes in other countries.

Removing 1 km of rock at Olympic Dam would reduce the vertical stress by ~25 MPa, increase the deviatoric stress and facilitate thrust-type faulting in the vicinity of the open pit, and possibly stimulate strike-slip failure on the Mashers Fault, triggered by the extensive pumping and disposal of ground water.

Relatively small (magnitude <6), local earthquakes might damage the Tailings Storage Facilities and release their radioactive tailings to contaminate ground and surface waters and be transported throughout Australia by dust storms. ……

Most critically, the misunderstanding concerning AS 1170.4-1993 indicates that the EIS Study Team is not competent to evaluate seismic risk. The EIS Study Team did not include any geophysicists – it is essential that the EIS be approved by seismologists,

EARTHQUAKE WARNINGS – SOUTH AUSTRALIANS WAITING FOR THE BIG ONE «

April 21, 2010 - Posted by | safety, South Australia, uranium | , , , , , ,

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