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Sulphate in the environment at Macraes Gold Mine

Water percolating through waste rock stacks generates an ongoing source of major ions in ground and surface waters at Macraes Gold Mine. Routine monitoring by the mine keeps a close eye on dissolved loads and spatio-temporal variations in ion concentrations occur regularly.

Time-series trends have shown a strong increase in sulphate in Macraes mine waters, to a point where compliance regulations from local governing bodies have stepped in. Is sulphate a pollutant in the local environment?

Recent work has determined pathways of sulphate at the mine, from source to discharging waters. Using this geological data, we will show that understanding environmental processes is arguably more important for local water quality than reacting to concentrations of certain elements, which management strategies can leverage off.

Presented by Erin Weightman, Cathy Rufaut, and Gavin Lee.

Date Tuesday, 28 July 2020
Time 1:00pm - 1:50pm
Audience All University
Event Category Sciences
Event Type Departmental Seminar
CampusDunedin
DepartmentGeology
LocationBenson Common Room (Gn9), Department of Geology, Dunedin Campus
CostFree
Contact Emailcathy.rufaut@otago.ac.nz

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