Kōrero: Mining and underground resources

Copper staining, Kawau Island (1 o 2)

Copper staining, Kawau Island

Weathering of copper-bearing minerals produces a wide halo of staining (called a gossan) by secondary copper minerals – often blue-green malachite as in this rock on Kawau Island. The presence of such copper staining is a useful exploration tool, but the presence of economic amounts of ore can only be tested by drilling down into unweathered rock.

Te whakamahi i tēnei tūemi

Private collection
Photograph by Eric Coppard

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Ngā whakaahua me ngā rauemi katoa o tēnei kōrero

Te tuhi tohutoro mō tēnei whārangi:

Simon Nathan, 'Mining and underground resources - Metals known but not mined', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/photograph/9241/copper-staining-kawau-island (accessed 27 January 2020)

He kōrero nā Simon Nathan, i tāngia i te 12 Jun 2006