oTAgo goLD aLLUVIAL mInINg

  • Alluvial gold mining in Otago, Gold in Otago, Department ...

    2021-12-29 · Alluvial mining is technically simpler than hard-rock mining, so alluvial mining dominated Otago's gold mining history. Alluvial gold occurs as loose particles in the gravel, and is therefore easy to separate because of the high

  • Patearoa gold: Alluvial ... - University of Otago

    2021-11-28 · Erosion of the gold-bearing schist may have contributed to the rich alluvial gold of the region. Patearoa is an historic gold mining area on the southern edge of the Maniototo Basin. The goldfield lies on the northern slopes of the

  • 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 rocks, which were threaded with quartz veins containing gold,

  • Environmental aspects of mining gold in Otago, Gold in ...

    2021-12-24 · Environmental standards of Otago's pioneering Europeans were low, and mining activity was essentially unconstrained. The scars still remain from this era because revegetation in Central Otago is slow, especially where the thin soil

  • Hard-rock gold mining in Otago, Gold in Otago,

    The gold content of quartz veins was 10-50 grams per tonne of ore. Mining hard-rock gold requires considerabley more technological input than alluvial gold. Historically, hard-rock mining was a minor part of the gold mining industry in

  • Gold Mining Techniques - Uniquely New Zealand

    2020-7-20 · In the Otago most of the Gold is Alluvial Gold - that is Gold is contained in alluvial gravels, deposited by the action of water and ice. The gravel does not need to be crushed and the separation is by various techniques of "washing" to separate the Gold which is very dense (density 19) from the much less dense rocks and sand.

  • Placer gold and associated supergene mineralogy at

    2018-11-8 · 2016). By contrast, alluvial gold in placers at Macraes Flat, like alluvial gold elsewhere in the Otago goldfield, is relatively coarse, with typical particle size ranging between 50 µm and 1 mm (Youngson & Craw 1993, 1999). The contrast in gold particle size between base-ment sources and placer deposits results mainly from

  • Hamiltons, Ranfurly, Central Otago District, Otago Region ...

    Hamiltons, Ranfurly, Central Otago District, Otago Region, New Zealand : Gold. Hamiltons was named after the pastoral station owner, who controlled the land at the time of the gold discovery in 1863. It was a rich field, with 4000 alluvial miners at the site by 1864, ...

  • Goldrush Online - kaelewis

    2021-10-22 · Otago Mining Records (1861 - 1866) West Coast Mining Records (1865 - 1871) ... Gold dust and nuggets from alluvial mining was melted down and turned into gold/silver (bullion) bars. Digging For Quartz Gold. Quartz gold is found underground in the main reefs or veins in the living rock walls. In Thames, New Zealand in 1868, a few rare reefs were ...

  • NAE Mining - NAE Mining - New Age Exploration Limited

    NAE has rapidly assembled a large 1,863km 2 tenement package in the highly competitive Central Pilbara district of Western Australia located ~50km from De Grey Mining's exciting Hemi gold discovery through a combination of NAE Exploitation Licence applications and acquisition of granted Exploration Licences from Monterey Minerals Inc. READ MORE >

  • Gold Mining Techniques - Uniquely New Zealand

    2020-7-20 · In the Otago most of the Gold is Alluvial Gold - that is Gold is contained in alluvial gravels, deposited by the action of water and ice. The gravel does not need to be crushed and the separation is by various techniques of "washing" to separate the Gold which is very dense (density 19) from the much less dense rocks and sand.

  • Alluvial gold mine approved | Otago Daily Times Online

    2016-8-23 · There's no need to travel to Rio to win gold, as a large-scale alluvial mining operation near Roxburgh has got resource consent. However, opposing neighbours may appeal. Independent commissioners yesterday released a decision allowing Kokiri Lime Company Ltd to mine on 163ha of land at Coal Creek Flat now used for pastoral farming and horticulture.

  • GOLD RUSH AND GOLD MINING: A ... - University of Otago

    2015-2-5 · gold rushing with gold mining is sometimes evident and another misconception entrenches corporate structure with the level of capitalisation and mixes the mining of alluvial and quartz reef gold. On May’s lines, this thesis argues that

  • Recent mining – Te Ara Encyclopedia of New Zealand

    Diggers revealed gold-bearing layers that previously had been too deep to mine. In the 1990s, large-scale alluvial opencast mining was carried out at Arahura and Ross on the West Coast, Nokomai in northern Southland, and near Millers Flat and the Tokomairiro River in Otago.

  • Placer gold and associated supergene mineralogy at

    2018-11-8 · 2016). By contrast, alluvial gold in placers at Macraes Flat, like alluvial gold elsewhere in the Otago goldfield, is relatively coarse, with typical particle size ranging between 50 µm and 1 mm (Youngson & Craw 1993, 1999). The contrast in gold particle size between base-ment sources and placer deposits results mainly from

  • Other goldfields – Te Ara Encyclopedia of New Zealand

    Payable alluvial gold was dug from Coal Island in Preservation Inlet, Fiordland, in the 1880s. In the 1890s two small towns, Cromarty and Te Oneroa, were cut out of the bush as quartz reefs were found and hard-rock mines were used to excavate them. But the gold did not last, and by 1904 few miners remained.

  • Gold mine would set benchmark | Otago Daily Times

    2016-6-17 · A large-scale gold mine proposed near Roxburgh will not only be economically viable, it will set the benchmark for best-practice environmental mining and rehabilitation, its developer says. The first day of a hearing into the resource consents for an alluvial gold mine at Coal Creek was held in Alexandra yesterday Kokiri Lime Co Ltd owner Mack ...

  • Hamiltons, Ranfurly, Central Otago District, Otago Region ...

    Hamiltons, Ranfurly, Central Otago District, Otago Region, New Zealand : Gold. Hamiltons was named after the pastoral station owner, who controlled the land at the time of the gold discovery in 1863. It was a rich field, with 4000 alluvial miners at the site by 1864, ...

  • Nevis Valley, Central Otago District, Otago Region, New ...

    Nevis Valley, Central Otago District, Otago Region, New Zealand : Gold, coal and shale oil. More information is needed on the origins of the uncommon species anapaite, listed against Nevis Valley. The Nevis Valley is an approximately 50 kilometre long ...

  • 'Disgraceful outcome': Councillor challenges government ...

    2021-7-12 · "You have to excavate a decent area to work out what's going on with new alluvial sites, and see if mining is feasible," Morrison said. His crew of three, plus contractors, had excavated a deep pit to explore the structure of the site, assess the volumes that would need to be stripped and had been testing different types of equipment ...

  • Alluvial gold mine approved | Otago Daily Times Online

    2016-8-23 · There's no need to travel to Rio to win gold, as a large-scale alluvial mining operation near Roxburgh has got resource consent. However, opposing neighbours may appeal. Independent commissioners yesterday released a decision allowing Kokiri Lime Company Ltd to mine on 163ha of land at Coal Creek Flat now used for pastoral farming and horticulture.

  • Central Otago Gold Story

    Otago’s alluvial gold comes from its schist mountains. During the ice ages, huge glaciers crushed and spread the schist through the valleys. Since then, the mighty Clutha Mata-au has acted like a huge sluice, leaving behind fine particles of gold where its waters flowed.

  • The Otago Schist, New Zealand and the Klondike Schist ...

    of gold exploration and mining. The Otago Schist historically produced over 8 Moz (>240 tonnes) of alluvial gold and 330,000 oz (10 tonnes) of gold from hard rock sources (Williams, 1974 ...

  • Gold and gold mining – Te Ara Encyclopedia of New Zealand

    The gold can be mined from the rocks through tunnelling, but it is difficult. Machines called stamper batteries were used to crush the rock, and the chemical cyanide helped to separate out the gold. Alluvial gold comes from the rocks once they

  • Golden Progress Mine, Idaburn, Central Otago District ...

    Golden Progress Mine, Idaburn, Central Otago District, Otago Region, New Zealand : The site was probably discovered around 1864, however the gold was found in quartz lodes, rather than alluvial gravels common to the district. As such it needed to wait for companies with capital to ...

  • Search the List | Otago Pioneer Quartz Mine Complex ...

    2015-7-1 · The beginnings of quartz mining. Gold mining is one of the major themes in New Zealand’s history and has had a ‘great impact on New Zealand landscape.’ Central Otago and Tuapeka were two of the principal areas of mining (along with the West Coast and the Coromandel). Mining took two forms – working alluvial gravels and quartz bedrock ...

  • Other goldfields – Te Ara Encyclopedia of New Zealand

    Payable alluvial gold was dug from Coal Island in Preservation Inlet, Fiordland, in the 1880s. In the 1890s two small towns, Cromarty and Te Oneroa, were cut out of the bush as quartz reefs were found and hard-rock mines were used to excavate them. But the gold did not last, and by 1904 few miners remained.

  • Hamiltons, Ranfurly, Central Otago District, Otago Region ...

    Hamiltons, Ranfurly, Central Otago District, Otago Region, New Zealand : Gold. Hamiltons was named after the pastoral station owner, who controlled the land at the time of the gold discovery in 1863. It was a rich field, with 4000 alluvial miners at the site by 1864, ...

  • Vigilance urged after theft from gold mine | Otago Daily ...

    2014-4-22 · Central Otago Police say that gold mining companies need to be vigilant about the risk of staff members stealing alluvial gold, following the sentencing of an Alexandra husband and wife for stealing and selling gold worth $24,000. The police summary of facts stated Jarad Tickle was employed by Glass Earth Mining Ltd between May 14 and November ...

  • 'Disgraceful outcome': Councillor challenges government ...

    2021-7-12 · "You have to excavate a decent area to work out what's going on with new alluvial sites, and see if mining is feasible," Morrison said. His crew of three, plus contractors, had excavated a deep pit to explore the structure of the site, assess the volumes that would need to be stripped and had been testing different types of equipment ...