Alluvial gold mining in Otago, Gold in Otago, Department ...
Alluvial mining is technically simpler than hard-rock mining, so alluvial mining dominated Otagos gold mining history. Alluvial gold occurs as loose particles in the gravel, and is therefore easy to separate because of the high density of the gold. Many of the earliest alluvial mines …
Otago Gold Rush - Wikipedia
Gold is still mined by OceanaGold in commercial quantities in Otago at one site - Macraes Mine inland from Palmerston, which started operations in 1990. Macraes Mine, an opencast hard rock mining operation, processes more than 5 million tonnes of ore per year and from 1990 through 2014, gold …
Otago (Gold) - NAE Mining
The regional geology is dominated by the Otago Schist belt, a high-grade metamorphic schist, which has a long history of both hard rock and alluvial gold mining. The Otago Schist is divided into structural …
Environmental aspects of mining gold in Otago, Gold in ...
Home. Research. Gold. Gold in Otago. 1. Island Block alluvial gold mine (near Roxburgh) after rehabilitation. The mine was developed in an old channel of the Clutha River (flats in foreground) which was abandoned thousands of years ago. During the mining operation, a hole more than 20 metres deep was dug progressively downstream, and the excavated gravel was used to backfill the hole after the gold …
Patearoa gold: Alluvial ... - University of Otago
The gold at Patearoa has been concentrated in gravel deposits (=alluvial gold) that accumulated in alluvial fans on the slopes of the actively rising Rock and Pillar Range. The on-going uplift over the past million years caused erosion of early-formed gravels, and the gold has been recycled into progressively younger gravel deposits, and into modern streams. The ultimate source of the gold. The Macraes gold …
Gold miner hopeful mining will be ... - Otago Daily Times
Jun 19, 2020 · Alluvial deposits are loose materials in rivers and waterways, like rocks, gravel and silt - which can contain gold in areas the heavy metal is naturally found. Proponents argue it is the most environmentally friendly way of extracting gold.
Gold in Otago, Department of Geology, University of Otago ...
Gold-bearing quartz veins are exposed at the surface on the hills in the distance, and alluvial gold workings are scattered in the streams in the foreground. Historically, the Geology Department grew out of the Otago School of Mines which was an important part of the University of Otago during the gold rushes and subsequent gold mining …
Gold, Department of Geology, University of Otago, New Zealand
The accumulation of gold in Otago involved a wide range of processes beginning with the formation of the Otago Schist basement. Progressive uplift and erosion of the schist released the gold into the sedimentary environment where it was further concentrated by physical and stone processes. Geological Evolution of Otago …
gold mining otagos - fumorestaurant.com.au
Alluvial gold mining in Otago, Gold in Otago, Gold mining in Otago required lots of water for sluicing techniques. Older Alluvial gold in Otago is usually very fine gold. This gold has been reworked into …
Bannockburn, New Zealand - Wikipedia
Bannockburn is a small historic gold mining town located outside of Cromwell in Central Otago, New Zealand. The area was first made known as a rich alluvial gold field and was mined extensively in the …
Gold fossicking - New Zealand Petroleum and Minerals
20 rows · Gold mining normally requires a permit from NZP&M, however 19 areas in historic South …
Public Gold Fossicking Areas - New Zealand Gold ...
Alluvial gold is present within all these gold fossicking areas, although the concentrations are often low. All these areas are suitable for gold panning and sluice boxing, mining being restricted to hand-held …
Otago – Te Ara Encyclopedia of New Zealand
Historically in Otago the majority of recovered gold was alluvial – less than 10% came from hard rock. Otago’s gold is linked to its schist rocks. Over the past 100,000 years glaciers ground away at the …
Gold and gold mining - teara.govt.nz
The early mining of the 1860s in Otago and on the West Coast was mainly undertaken by individuals working alluvial deposits (river gravels). In three separate years in the late 1860s and early 1870s the …