Alluvial gold mining in Otago, Gold in Otago, Department

2021-9-29  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 density of the gold.

Alluvial gold along the northeast Otago margin, Geology

2021-10-7  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

Patearoa gold: Alluvial University of Otago

2021-9-15  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 actively rising Rock &

Environmental aspects of mining gold in Otago, Gold in

2021-9-30  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 has been sluiced

Alluvial gold Gold and gold mining Te Ara

2 天前  Alluvial gold. These gold nuggets have been mined from river gravels in Otago. The gold has been beaten by boulders in flood waters, then folded back over countless times to give these flattened shapes. Dark impurities visible in the larger nuggets are

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

2021-10-3  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 Otago

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.

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

2021-10-6  Modern mining is at a much larger scale and can therefore work ground economically at very low grades. Modern alluvial mines such as Nokomai, Cromwell, Scotland Point, Island Block and Glenore (all closed) can work profitably where there

Alluvial Gold in Eastern Southland: Origin of the Gold and

Middle and Late Cenozoic fluvial conglomerates and gravel in northeastern Southland record the transport of alluvial gold from Central Otago into Southland, and subsequent reworking and concentration of this gold into economic placer deposits. A corridor of geochemically distinctive, Hg-free gold derived ultimately from veins in Torlesse Terrane schist in Otago extends through the Caples

Goldrush Online kaelewis

2021-8-26  Otago Mining Records (1861 1866) Thames Mining Records (1867 1872) 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 on

Alluvial Gold in Eastern Southland: Origin of the Gold and

Middle and Late Cenozoic fluvial conglomerates and gravel in northeastern Southland record the transport of alluvial gold from Central Otago into Southland, and subsequent reworking and concentration of this gold into economic placer deposits. A corridor of geochemically distinctive, Hg-free gold derived ultimately from veins in Torlesse Terrane schist in Otago extends through the Caples

Alluvial gold Gold and gold mining Te Ara

2 天前  Alluvial gold. These gold nuggets have been mined from river gravels in Otago. The gold has been beaten by boulders in flood waters, then folded back over countless times to give these flattened shapes. Dark impurities visible in the larger nuggets are

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 TECHNOLOGICAL

2016-12-5  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 technology lies at the heart of all gold rushes and

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

Archaeological survey of the Arrow River and Macetown,

2018-5-25  the focus for alluvial gold mining operations as well as the site of the town of Macetown (Figs 3 and 4). Extensive alluvial workings were also located on the hillsides above the township, and in many places along the bed and banks of the river. The insides of

Seeking to mine gold in Winding Creek Valley Otago

2021-7-30  A South Island mining company is seeking to renew extraction of gold from a Northern Southland area that has a long history with the prized mineral. Bromoore Gold Limited has lodged resource consent applications to establish an alluvial gold mine in Winding Creek Valley, to the east of Waikaia. The operation would involve excavation of two

Early Water Races in Central Otago

Otago are introduced. 2. MT IDA WATER RACE 2.1 Mining and construction Alluvial gold mining began in Naseby in 1863 (Hamel), using water from the Hogburn and a number of other races from the East Eweburn and the Kyeburn. The disposal of tailings was difficult, because of the lack of flushing water and the relatively flat grade from the

Goldrush Online kaelewis

2021-8-26  Otago Mining Records (1861 1866) Thames Mining Records (1867 1872) 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 on

Gold New Zealand Geographic

2 天前  This is certainly true of industrial gold-mining, though here the scale, complexity and microscopic precision of extraction can be staggering. If my nugget-detecting was a needle-in-the-haystack kind of quest, at Macraes Flat, in coastal Otago, the gold

Archaeological survey of the Arrow River and Macetown,

2018-5-25  the focus for alluvial gold mining operations as well as the site of the town of Macetown (Figs 3 and 4). Extensive alluvial workings were also located on the hillsides above the township, and in many places along the bed and banks of the river. The insides of

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.

One submission received on gold mining application

2021-9-9  A South Island mining company has moved to the next step of its resource consent application to establish an alluvial gold mine in Winding Creek Valley, to the east of Waikaia. Bromoore Gold Ltd lodged an application with Southland District Council when it

Seeking to mine gold in Winding Creek Valley Otago

2021-7-30  A South Island mining company is seeking to renew extraction of gold from a Northern Southland area that has a long history with the prized mineral. Bromoore Gold Limited has lodged resource consent applications to establish an alluvial gold mine in Winding Creek Valley, to the east of Waikaia. The operation would involve excavation of two

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

Early Water Races in Central Otago

Otago are introduced. 2. MT IDA WATER RACE 2.1 Mining and construction Alluvial gold mining began in Naseby in 1863 (Hamel), using water from the Hogburn and a number of other races from the East Eweburn and the Kyeburn. The disposal of tailings was difficult, because of the lack of flushing water and the relatively flat grade from the

Gold New Zealand Geographic

2 天前  This is certainly true of industrial gold-mining, though here the scale, complexity and microscopic precision of extraction can be staggering. If my nugget-detecting was a needle-in-the-haystack kind of quest, at Macraes Flat, in coastal Otago, the gold

Goldrush Online kaelewis

2021-8-26  Otago Mining Records (1861 1866) Thames Mining Records (1867 1872) 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 on

Mine For Gold

All these areas are historic gold mining areas and alluvial gold is still commonly found. The concentration of gold does not justify commercial mining today. However, as discussed already, the ability to recover 100% of the gold you recover combined with the high prices of gold today can make it a viable prospect for the hobby gold miner to

'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