Supergene gold mobility in orogenic gold deposits, Otago Schist, New Zealand

About this item

Title

Supergene gold mobility in orogenic gold deposits, Otago Schist, New Zealand

Content partner

University of Otago

Collection

Otago University Research Archive

Description

Gold has been chemically mobilised by groundwater from host sulphide minerals in orogenic gold deposits of Otago. Mobilisation occurred near the Cenozoic Otago Schist erosional surface beneath a sedimentary cover. Initial Au mobilisation, on a scale of micrometres, occurred when solid solution and microparticulate gold in pyrite and arsenopyrite grains were liberated by sulphide oxidation to iron oxyhydroxide pseudomorphs. Larger-scale mobilisation involved leaching of gold from up to 100-m-t...

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Format

Research paper

Research format

Scholarly text / Journal article

Thesis level

Article

Date created

2015-04-03

Creator

Craw, D / MacKenzie, D / Grieve, P

URL

https://hdl.handle.net/10523/31690

Related subjects

crystal / enrichment / gold / oxidation / thiosulphate / vein

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