otago gold alluvial mining

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

    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 density of the gold.

  • Alluvial gold along the northeast Otago margin, Geology

    The Blue Lake alluvial gold mine, St Bathans, Central Otago. The Blue Lake Fault passes through this area, but is diffuse as it has caused shearing at several different rock boundaries. Gold was enriched near the boundary between the white quartz gravels (centre) and the greywacke basement that forms the hills to the right and in the background.

  • Environmental aspects of mining gold in Otago, Gold in

    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

  • Patearoa gold: Alluvial University of Otago

    The Macraes deposit contains at least 9 million ounces of gold, more than the historical alluvial gold production from Otago. Erosion of the Macraes deposit, and other similar deposits, released gold grains into rivers that transported the gold all over Otago.

  • Economies of Scale (gold in Otago), Gold in Otago

    The total reported historical alluvial gold production from Otago was about 240 tonnes but undeclared gold could make this a very much higher figure. Hard-rock mining was on a small scale only, and most mines consisted of a few hundred metres of tunnels and a stamping battery.

  • Alluvial gold along the northeast Otago margin, Geology

    The Blue Lake alluvial gold mine, St Bathans, Central Otago. The Blue Lake Fault passes through this area, but is diffuse as it has caused shearing at several different rock boundaries. Gold was enriched near the boundary between the white quartz gravels

  • Economies of Scale (gold in Otago), Gold in Otago

    The total reported historical alluvial gold production from Otago was about 240 tonnes but undeclared gold could make this a very much higher figure. Hard-rock mining was on a small scale only, and most mines consisted of a few hundred metres of tunnels and

  • 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 amount of gold won exceeded 20,000 kilograms.

  • Blue Lake and how the gold got there University of Otago

    Blue Lake, at the foot of Mt St Bathans in Central Otago, is one of several important historical gold mines in the area. Mt St Bathans is made up of 200 million year old greywacke and that continues deep under the Blue Lake area. It is unusual to find gold associated with greywacke

  • 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 1860s.. Its uniquely warm, dry climate earned it the name 'The heart of the desert', as climatic conditions and human activity have combined to strip the area of most of the original native

  • GOLD RUSH AND GOLD MINING: A University of Otago

    This thesis is an attempt to marry my experience as a mining engineer in alluvial gold led by the Gabriel's Gully or Tuapeka gold rush in Otago in 1861. An alluvial diamond rush in South Africa in 1870 presaged a corporate scramble for quartz reefs, not a rush,

  • II. The Otago Gold Rush fergusmurraysculpture

    Otago's total reported alluvial gold production was 240 tonnes but does not take account of undeclared gold. Hard-rock mining was on a small scale and produced less than 20 tonnes of gold (University of Otago).

  • Otago Gold Rush Wikipedia

    The Otago Gold Rush (often called the Central Otago Gold Rush) was a gold rush that occurred during the 1860s in Central Otago, New Zealand.This was the country's biggest gold strike, and led to a rapid influx of foreign miners to the area many of them veterans of other hunts for the precious metal in California and Victoria, Australia.. The rush started at Gabriel's Gully but spread

  • Queenstown man selling Central Otago gold mine claim for

    Oct 27, 2016· A map of a gold mine claim up for sale in the Nevis Valley, Central Otago. Thomas has mined other claims on the West Coast and in the Nevis but,

  • Alluvial Gold Explained To Help You Find Gold

    Alluvial Gold: Eluvial Gold: Relationship to primary source of gold: Fine gold and small nuggets Can be transported many kilometers from source of gold. Can be ancient alluvial gold deposits in ground lifted high above current stream levels. Large nuggets, may be closer to primary gold source. How is this type of gold transported

  • 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, and rivers washed and sorted the gravels.

  • Gold and the economy Te Ara Encyclopedia of New Zealand

    Gold-mining economics relies on the price of gold if the price rises sharply even low-grade deposits (if they are large enough) become economic to mine. If it drops then only the richer areas of the mine will be worth mining. There is a lot of gold in the ground, but it is mixed with worthless rocks.

  • 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,

  • Otago again going for gold Otago Daily Times Online News

    Jul 18, 2012· Otago is in the midst of a modern-day gold rush. About 150 years after Hartley and Reilly's discovery of gold in Central Otago, the industry that created the region is going strong, although largely out of the public eye. These days you would be hard-pressed to find signs of current gold-mining unless you took a drive down the back roads.

  • GOLD RUSH AND GOLD MINING: A University of Otago

    This thesis is an attempt to marry my experience as a mining engineer in alluvial gold led by the Gabriel's Gully or Tuapeka gold rush in Otago in 1861. An alluvial diamond rush in South Africa in 1870 presaged a corporate scramble for quartz reefs, not a rush,

  • 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 1860s.. Its uniquely warm, dry climate earned it the name 'The heart of the desert', as climatic conditions and human activity have combined to strip the area of most of the original native

  • II. The Otago Gold Rush fergusmurraysculpture

    Otago's total reported alluvial gold production was 240 tonnes but does not take account of undeclared gold. Hard-rock mining was on a small scale and produced less than 20 tonnes of gold (University of Otago).

  • Otago Gold Rush Wikipedia

    The Otago Gold Rush (often called the Central Otago Gold Rush) was a gold rush that occurred during the 1860s in Central Otago, New Zealand.This was the country's biggest gold strike, and led to a rapid influx of foreign miners to the area many of them veterans of other hunts for the precious metal in California and Victoria, Australia.

  • Mining gold: New Zealand historic heritage conservation

    Then came the big Otago rush of 1861 and ended when Waiuta closed in 1953. The principal New Zealand goldfields were Coromandel, Nelson/Marlborough, Central Otago and West Coast. The two main types of gold mine were: 'hard rock' quartz mines, and; alluvial mining which included panning and cradling, sluicing and dredging.

  • Lammerlaw Gold Exploration Project 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 blocks or zones of increasing metamorphic grade known as; Sub-Greenschist Facies, Lower Greenschist Facies, Upper Greenschist Facies and

  • Gold and the economy Te Ara Encyclopedia of New Zealand

    Up to 2003, about 538,640 kilograms of alluvial and 368,544 kilograms of hard-rock gold had been produced in New Zealand. The total value (in 2003 terms) was US$116.32 billion. A few large operations were responsible for most of the hard-rock gold. The Waiuta mine near Reefton produced 62,369 kilograms of gold between 1870 and 1951.

  • 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,

  • Queenstown man selling Central Otago gold mine claim for

    Oct 27, 2016· A map of a gold mine claim up for sale in the Nevis Valley, Central Otago. Thomas has mined other claims on the West Coast and in the Nevis but,

  • Alluvial Gold Explained To Help You Find Gold

    Fine gold and small nuggets Can be transported many kilometers from source of gold. Can be ancient alluvial gold deposits in ground lifted high above current stream levels. Large nuggets, may be closer to primary gold source. How is this type of gold transported. Moved by water through gullies, streams, creeks and rivers.

  • Otago again going for gold Otago Daily Times Online News

    Jul 18, 2012· Otago is in the midst of a modern-day gold rush. About 150 years after Hartley and Reilly's discovery of gold in Central Otago, the industry that created the region is going strong, although largely out of the public eye. These days you would be hard-pressed to find signs of current gold-mining unless you took a drive down the back roads.

  • Gold and gold mining Te Ara Encyclopedia of New Zealand

    Mining today. Gold helped make New Zealand’s economy successful because it attracted people, investments and shipping. Because the price of gold was fixed, gold mining declined in the mid-20th century, but revived in the 1980s when the price was allowed to float. Today, gold still earns the country millions of dollars each year.

  • 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 non-motorised methods within the active stream bed. Nelson-Marlborough and the West Coast

  • Alluvial gold mine approved Otago Daily Times Online News

    Aug 23, 2016· 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.

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