We running out of silver? - Truth or Fiction?
Posted: Mon Apr 02, 2012 4:59 pm
If you're like me you have probably read at one time or another the following statement:
The United States Geological Survey (USGS) has stated that we will run out of silver from Earth's surface around 2020.
Source: http://goldnews.bullionvault.com/peak_silver_060420096
I often wondered is this statement truth or fiction? Does this mean silver will have to come from recycling and as a by product of other mining operations or what? So I decided to go to the source and ask directly the USGS and below was their response:
Thanks for coming to the US Geological Survey with your questions on silver. I get this question frequently and am happy to respond. This information, from the Appendix C of Mineral Commodity Summaries 2011, addresses your concerns:
“Reserves data are dynamic. They may be reduced as ore is mined and/or the extraction feasibility diminishes, or more commonly, they may continue to increase as additional deposits (known or recently discovered) are developed, or currently exploited deposits are more thoroughly explored and/or new technology or economic variables improve their economic feasibility. Reserves may be considered a working inventory of mining companies’ supply of an economically extractable mineral commodity. As such, magnitude of that inventory is necessarily limited by many considerations, including cost of drilling, taxes, price of the mineral commodity being mined, and the demand for it. Reserves will be developed to the point of business needs and geologic limitations of economic ore grade and tonnage. For example, in 1970, identified and undiscovered world copper resources were estimated to contain 1.6 billion metric tons of copper, with reserves of about 280 million metric tons of copper. Since then, about 400 million metric tons of copper have been produced worldwide, but world copper reserves in 2010 were estimated to be 630 million metric tons of copper, more than double those in 1970, despite the depletion by mining of more than the original reserves estimate.
Future supplies of minerals will come from reserves and other identified resources, currently undiscovered resources in deposits that will be discovered in the future, and material that will be recycled from current in-use-stocks of mineral or from minerals in waste disposal sites. Undiscovered deposits of minerals constitute an important consideration in assessing future supplies. USGS reports provide estimates of undiscovered mineral resources using a three-part assessment methodology (Singer and Menzie, 2010). Mineral-resource assessments have been carried out for small parcels of land being evaluated for land reclassification, for the Nation, and for the world.”
There are few mines in the United States that produce only silver. For 22 of the 25 leading silver-producing mines in the United States in 2009, the source of silver was not silver ore. A report in the December 2007 issue of Platts Metals Week noted that a vice president of Hecla Mining Co. (Coeur d’Alene, ID) pointed out that the company’s Lucky Friday Mine has operated for 50 years, rarely with a projected mine life of more that 4 or 5 years based on proven and probable reserves, because of the way exploration is conducted from underground. In addition, even though silver is extracted, more silver is discovered indirectly through gold, copper, lead-zinc, and molybdenum exploration that may or may not offset the quantity that is extracted.
Reference Cited
Singer, D.A., and Menzie, W.D., 2010, Quantitative mineral resource assessments—An integrated approach: Oxford, United Kingdom, Oxford University Press, 219 p
George Bedinger
Arsenic, Mercury, and Silver
Mineral Commodity Specialist
National Minerals Information Center
US Geological Survey
989 National Center
Reston, Virginia 20192
voice: 703-648-7791
fax: 703-648-7975
e-mail: gbedinger@usgs.gov
internet: http://minerals.usgs.gov/minerals
The United States Geological Survey (USGS) has stated that we will run out of silver from Earth's surface around 2020.
Source: http://goldnews.bullionvault.com/peak_silver_060420096
I often wondered is this statement truth or fiction? Does this mean silver will have to come from recycling and as a by product of other mining operations or what? So I decided to go to the source and ask directly the USGS and below was their response:
Thanks for coming to the US Geological Survey with your questions on silver. I get this question frequently and am happy to respond. This information, from the Appendix C of Mineral Commodity Summaries 2011, addresses your concerns:
“Reserves data are dynamic. They may be reduced as ore is mined and/or the extraction feasibility diminishes, or more commonly, they may continue to increase as additional deposits (known or recently discovered) are developed, or currently exploited deposits are more thoroughly explored and/or new technology or economic variables improve their economic feasibility. Reserves may be considered a working inventory of mining companies’ supply of an economically extractable mineral commodity. As such, magnitude of that inventory is necessarily limited by many considerations, including cost of drilling, taxes, price of the mineral commodity being mined, and the demand for it. Reserves will be developed to the point of business needs and geologic limitations of economic ore grade and tonnage. For example, in 1970, identified and undiscovered world copper resources were estimated to contain 1.6 billion metric tons of copper, with reserves of about 280 million metric tons of copper. Since then, about 400 million metric tons of copper have been produced worldwide, but world copper reserves in 2010 were estimated to be 630 million metric tons of copper, more than double those in 1970, despite the depletion by mining of more than the original reserves estimate.
Future supplies of minerals will come from reserves and other identified resources, currently undiscovered resources in deposits that will be discovered in the future, and material that will be recycled from current in-use-stocks of mineral or from minerals in waste disposal sites. Undiscovered deposits of minerals constitute an important consideration in assessing future supplies. USGS reports provide estimates of undiscovered mineral resources using a three-part assessment methodology (Singer and Menzie, 2010). Mineral-resource assessments have been carried out for small parcels of land being evaluated for land reclassification, for the Nation, and for the world.”
There are few mines in the United States that produce only silver. For 22 of the 25 leading silver-producing mines in the United States in 2009, the source of silver was not silver ore. A report in the December 2007 issue of Platts Metals Week noted that a vice president of Hecla Mining Co. (Coeur d’Alene, ID) pointed out that the company’s Lucky Friday Mine has operated for 50 years, rarely with a projected mine life of more that 4 or 5 years based on proven and probable reserves, because of the way exploration is conducted from underground. In addition, even though silver is extracted, more silver is discovered indirectly through gold, copper, lead-zinc, and molybdenum exploration that may or may not offset the quantity that is extracted.
Reference Cited
Singer, D.A., and Menzie, W.D., 2010, Quantitative mineral resource assessments—An integrated approach: Oxford, United Kingdom, Oxford University Press, 219 p
George Bedinger
Arsenic, Mercury, and Silver
Mineral Commodity Specialist
National Minerals Information Center
US Geological Survey
989 National Center
Reston, Virginia 20192
voice: 703-648-7791
fax: 703-648-7975
e-mail: gbedinger@usgs.gov
internet: http://minerals.usgs.gov/minerals