Hydrologist and geoscientist Terry Widdowson will be speaker at the Christchurch AusIMM Discussion Group later this month.
He will talk about the remediation of arsenic and zinc at the historic Alexander gold mine near Reefton.
The AusIMM said in its lifetime there were high arsenic content in concentrates in a roaster at the mine and in tailings stockpiles, and the objective was to make the site safe for human access while retaining heritage structures.
This was achieved by burying the contaminated soil and tailings in an on-site engineered containment cell.
Widdowson has worked in both the private and public sector on environmental issues and worked initially on underground nuclear waste repositories in the United Kingdom before moving to New Zealand about a decade ago.
The presentation will be on the evening of June 28 at Golder Associates’ Regent Meeting Room, level 1, 214 Durham St, Christchurch Central.