Group members: Tyler, Jamie
History
Gold is the main purpose of the mine as it is one of the richest gold deposits discovered in the world.
The mine opened in 1893. There were many attempts to get this gold deposit, (in the form of smaller mines) but none of them were successful, so they all merged together to make the super pit in 1989 owned by the Northern Star Resources.
The super pit gold mine is located in Kalgoorlie-boulder, this is one of the largest open pit gold mines in Australia. The size of the pit is currently 3.5km long, 1.5 km wide, and 600m deep (it's so big you can see it from space!).
Mineral Formation
The gold formed in the Super Pit gold mine was originally created from ancient shears within a massive underground rock called the Golden Mile Dolerite, which is 5 km long, 2 km wide, and 1 km deep. These deposits exist from hot fluids flowing through rock, depositing amounts of gold into the rock from the fluid.
The gold mined at the pit is pure gold (Au). This gold is sent out and used for jewellery, medical equipment, and electronics such as phones, laptops and more. This gold equates to 8% of all Australian mined gold.
The Super Pit is a standard rectangular open pit gold mine. An open pit mine works by extracting minerals from an open mine in the ground and relocating all the waste off-site. This method is only used when the mineral ore body being mined is close to the surface. If an ore body is too deep then often a tunnel mine method will be used instead. Most pits are mined to have steps on the sides to prevent avalanches on site and to help the excavation trucks out of the pit.
Effects of the Mine
The Super Pit gold mine currently makes 800,000 ounces of gold a year which is equivalent to $2,480,944,000 AUD. This creates many jobs at the site including dump truck operators, project geologists, mining supervisors, mining geologists etc. Neighbouring towns would feel the most impact when this mine shuts down, as most people in the area would lose their jobs and main income.
Open pit mining comes with a few risk which includes sudden and unexpected collapse of the floor/ walls of the mine, the risk of crushing/ being buried, poor air conditions and lost explosives. One incident at the super mine was the fire caused by an equipment malfunction which caused $500,000 to $700,000 of damage.
The Wangkatja people are currently living in Kalgoorlie and have been for over 50,000 years. Most land was restricted or taken from the Aboriginals due to the gold rush conditions and some were never given back, this issue still hasn't been resolved to this day.
Open pit mining is the most destructive type of mining because it displaces large areas of land, it releases different pollutants into the water and air depending on which mineral is being mined. It can also be very dangerous because of the long depths to the bottom.
Some of the negative effects include:
Land clearing
Loss of animal diversity
Soil or water contamination
Releases dangerous gasses like carbon monoxide, hydrogen sulphide, methane, or carbon dioxide
The super pit mine affects all the air quality around the area. This is because of all the drilling and blasting of the ore body releases dust all around the sight, all the loading and unloading of the ore, and the crushing and conveying.
The mining company responsible for the super pit gold mine is KCGM and so far they have put a greenbelt over 730 hectares and 210,000 trees in between the mine and the city to protect from dust problems and increase air quality. The KCGM plans until 2034 to add in new noise bunds to the boundary of the super pit gold mine to reduce noise pollution across the city.
Kalgoorlie Super Pit | Institution of Civil Engineers (ICE)
20 Fun Facts about the Kalgoorlie Gold Mine, the Super Pit
Can gold be created from other elements?
Golden Mile & Super Pit: Kalgoorlie-Boulder
Kalgoorlie Super Pit | Institution of Civil Engineers (ICE)
Mining and your Community: Know your Environmental Rights
https://www.theguardian.com/australia-news/2018/apr/03/kalgoorlies-indigenous-youth-33-feel-high-psychological-distress-study
Acoustic Bunds - Geosynthetics