Everything You Need to Know About Copper Porphyries
Presented by Entrée Gold
What is a Porphyry?
Porphyry deposits are very large, polymetallic systems that typically contain copper along with other important metals. Much of today’s mineral production depends on porphyries: 60% of copper, 95% of molbdenum, and 20% of gold comes from this deposit type.
Where and How are Porphyries Formed?
Porphyries are most commonly found along the west coast of North and South America, as well as in the Southwest Pacific.
Porphyries are formed in tectonic plate convergent zones where oceanic crust has subducted beneath the continental crust, and in some cases the oceanic crust. As the plate subducts, the overlying upper mantle partially melts and the liquid magma rises to the surface. Hot fluids rise to the surface by flowing through cracks and fissures. Metals precipitate out of the solution as fluid cools and moves away from the heat source and pressure.
In porphyry mineralization, there are many economic minerals that can be found: copper, gold, molybdenum, silver, lead, zinc, tin, and tungsten. There are also associated mineral deposits that can form that depend on the host rock and the distance from the heat source. These include skarn, epithermal, and breccia type deposits.
Four Things to Know on Porphyries
- Polymetallic nature – Each porphyry is unique and holds different concentrations of minerals. Some deposits have such high concentrations of gold that they may be considered gold deposits rather than copper deposits. Others have barely any gold at all but may have plenty of molybdenum.
- Large Size, Low Grade – Porphyries typically have 100 million to 5 billion tonnes of ore with a lower grade (0.2% to >1% copper). It is the size of these deposits that allow for bulk mining and economies of scale.
- Long Mine Life – The size of porphyry systems usually mean that the life of the mine can be multi-decades long. This means that these deposits last through multiple market cycles, and are thus not as vulnerable to challenging market environments compared to other smaller mines.
- Infrastructure is Key – In order to process large amounts of ore, infrastructure can be a large part of initial capital expenditures (CAPEX). Access to power and water are key issues as large amounts of both are needed to process ore. The footprint of the mine and volume of tailings disposal can also make porphyries more challenging to permit.
Each year the Bingham Canyon Mine, located in Utah and owned by Rio Tinto and in production since 1906, produces approximately:
- 300,000 tons of copper
- 400,000 oz of gold
- 4,000,000 oz of silver
- 30,000,000 lbs of molybdenum
The value of the resources extracted to date from the Bingham Canyon Mine is greater than the Comstock Lode, Klondike, and California gold rush mining regions combined.
An Investor’s Guide to Copper in 3 Charts
Explore three key insights into the future of the copper market, from soaring demand to potential supply constraints.
An Investor’s Guide to Copper
Copper is the world’s third-most utilized industrial metal and the linchpin of many clean energy technologies. It forms the vital connections in our electricity networks, grid storage systems, and electric vehicles.
In the above infographic, iShares digs into the forces that are set to shape the future of the copper landscape.
How Much Copper Do We Need?
Copper is poised to experience a remarkable 54% surge in demand from 2022 to 2050.
Here’s a breakdown of the expected demand for copper across clean energy technologies.
|Technology||2022 (kt)||2050P (kt)|
|Other low emissions power generation||93.7||142.2|
|Grid battery storage||24.6||665.2|
Copper is vital in renewable energy systems such as wind turbines, solar panels, and electric vehicle batteries because of its high electrical conductivity and durability.
It ensures the effective transmission of electricity and heat, enhancing the overall performance and sustainability of these technologies.
The rising demand for copper in the clean energy sector underscores its critical role in the transition to a greener and more sustainable future.
When Will Copper Demand Exceed Supply?
The burgeoning demand for copper has set the stage for looming supply challenges with a 22% gap predicted by 2031.
Given this metal’s pivotal role in clean energy and technological advancements, innovative mining and processing technologies could hold the key to boosting copper production and meeting the needs of a net-zero future.
Investing in Copper for a Prosperous Future
Investors looking for copper exposure may want to consider an ETF that tracks an index that offers access to companies focused on the exploration and mining of copper.
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