These plants, which were conceived of, and perfected, in New Zealand, were highly successful and are now in use throughout the world.Īn 8-inch production dredge in New Zealand. New technology was introduced and during the 1980s most alluvial gold was produced by the use of hydraulic excavators, which fed skid mounted or floating rotary screens.
Gold mining activity remained at a low level until there was a renewed interest in prospecting and mining due to the rise in the price of gold in 1979. Then, following the First World War, gold production declined with only a few hard rock mines remaining in production and a small number of the largest bucket dredges continuing. In the North Island, rich quartz reefs were discovered in the late 1800s, which greatly boosted the country's already considerable production of alluvial gold from the South Island. Later, with the arrival of great numbers of experienced miners from the then declining goldfields of California and Australia, mining methods rapidly progressed, and by the turn of the century bucket dredging was being carried out in the South Island on a scale greater than in any country. In the early years of the rush, mining almost entirely consisted of simple hand sluicing in the gravels of rivers and streams. Gold was first discovered in New Zealand during the early 1840s, but it was only when prospectors located rich alluvial deposits of easily won gold in the South Island in 1861 that the country experienced its first true gold rush. The climate is temperate with moderate to abundant rainfall. It's a prosperous country with a population of 4 million. New Zealand is located in the southwest Pacific Ocean and is made up of two main islands, North and South, as well as the much smaller Stewart Island to the south and a number of minor islands.
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