Mining
Everything You Need to Know on VMS Deposits
Everything You Need to Know about VMS Deposits
People are often not aware of where their most prized devices really come from.
Phones, cars, and computers might not seem like the most natural objects. But the metals that make them come from natural processes deep in the earth’s crust – processes that have been going on for 3.4 billion years, and continue to this day.
Today’s visualization comes to us from Foran Mining Corp. and goes in depth to show how one type of mineral deposit, Volcanogenic Massive Sulphide or “VMS”, forms and is the primary source for many of the materials that make the modern world.
What is a VMS Deposit?
Volcanogenic Massive Sulphide (VMS) deposits are one of the richest sources of metals such as copper, lead, and zinc globally. VMS deposits can also produce economic amounts of gold and silver as byproducts of mining these deposits.
Currently, global metal production from VMS deposits account for 22% of zinc, 9.7% of lead, 6% of copper, 8.7% of silver and 2.2% of gold.
Where are VMS deposits found?
VMS deposits occur around the globe and often form in clusters or camps, following the tectonic plate boundaries in areas of ancient underwater volcanic activity.
Natural processes underway today are forming the VMS deposits of tomorrow. This gives scientists an incredible advantage in witnessing how VMS deposits form and gives a special advantage to geologists for what to look for.
Mineralization and Formation
The geological processes that form VMS deposits occur at the depths of the ocean and are associated with volcanic and/or sedimentary rocks.
At sections where the Earth’s crust is thin due to faulting or separation of tectonic plates, the magma heats up the ocean floor.
As the Earth’s crust heats up, the ground softens and allows heated magma to escape towards the ocean or crust contact, the early beginning of a volcano and the deposition of minerals into the ocean floor from magma. Also, the heated ground cracks and begins a process that draws in sea water into the crust which becomes super-heated and imbued with minerals. Black and white smokers expel this seawater back to the surface.
Black and white smokers exhale a mineral rich-plume that spreads out over the ocean floor. As it moves farther and farther away from its heat source, the plume precipitates minerals onto the ocean floor. Over time, the continual activity of the smokers and their mineral rich plumes create mineralized beds that become VMS deposits.
With the movement of the Earth’s tectonic plates, these mineral rich beds are transposed and can be found on land that was once underwater.
How Big Can VMS Deposits Get?
Current resource and historical production figures from 904 VMS deposits around the world average roughly 17 million tonnes (“Mt”), of which is approximately 1.7% copper, 3.1% zinc, and 0.7% lead.
A few giant mineral deposits (greater than 30 Mt) and several copper-rich and zinc-rich deposits of median tonnage (~2 Mt) skew the averages.
Several large VMS camps are known in Canada, including the Flin Flon, Bathurst and Noranda camps. The high-grade deposits within these camps are often in the range of five to 20 million tonnes of ore and can be much larger.
Meanwhile, approximately 90 VMS deposits have been discovered in the Iberian Pyrite Belt which runs through Portugal and Spain. Several of these are larger than 100 million tonnes, making this region one of the most significant hosts to VMS deposits in the world.
Energy
Visualizing U.S. Consumption of Fuel and Materials per Capita
Wealthy countries consume large amounts of natural resources per capita, and the U.S. is no exception. See how much is used per person.

Visualizing U.S. Consumption of Fuel and Materials per Capita
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Wealthy countries consume massive amounts of natural resources per capita, and the United States is no exception.
According to data from the National Mining Association, each American needs more than 39,000 pounds (17,700 kg) of minerals and fossil fuels annually to maintain their standard of living.
Materials We Need to Build
Every building around us and every sidewalk we walk on is made of sand, steel, and cement.
As a result, these materials lead consumption per capita in the United States. On average, each person in America drives the demand of over 10,000 lbs of stone and around 7,000 lbs of sand and gravel per year.
Material/Fossil Fuel | Pounds Per Person |
---|---|
Stone | 10,643 |
Natural Gas | 9,456 |
Sand, Gravel | 7,088 |
Petroleum Products | 6,527 |
Coal | 3,290 |
Cement | 724 |
Other Nonmetals | 569 |
Salt | 359 |
Iron Ore | 239 |
Phosphate Rock | 166 |
Sulfur | 66 |
Potash | 49 |
Soda Ash | 36 |
Bauxite (Aluminum) | 24 |
Other Metals | 21 |
Copper | 13 |
Lead | 11 |
Zinc | 6 |
Manganese | 4 |
Total | 39,291 |
The construction industry is a major contributor to the U.S. economy.
Crushed stone, sand, gravel, and other construction aggregates represent half of the industrial minerals produced in the country, resulting in $29 billion in revenue per year.
Also on the list are crucial hard metals such as copper, aluminum, iron ore, and of course many rarer metals used in smaller quantities each year. These rarer metals can make a big economic difference even when their uses are more concentrated and isolated—for example, palladium (primarily used in catalytic converters) costs $54 million per tonne.
Fuels Powering our Lives
Despite ongoing efforts to fight climate change and reduce carbon emissions, each person in the U.S. uses over 19,000 lbs of fossil fuels per year.
Gasoline is the most consumed petroleum product in the United States.
In 2021, finished motor gasoline consumption averaged about 369 million gallons per day, equal to about 44% of total U.S. petroleum use. Distillate fuel oil (20%), hydrocarbon gas liquids (17%), and jet fuel (7%) were the next most important uses.
Reliance on Other Countries
Over the past three decades, the United States has become reliant on foreign sources to meet domestic demand for minerals and fossil fuels. Today, the country is 100% import-reliant for 17 mineral commodities and at least 50% for 30 others.
In order to reduce the dependency on other countries, namely China, the Biden administration has been working to diversify supply chains in critical minerals. This includes strengthening alliances with other countries such as Australia, India, and Japan.
However, questions still remain about how soon these policies can make an impact, and the degree to which they can ultimately help localize and diversify supply chains.
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