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cut off grade copper ore 2012

THE IMPORTANCE OF DILUTION FACTOR FOR OPEN PIT

tonne of ore with 0.3g/t can be sent to the mill and be expected to generate a small amount of profit. Ten percent dilution in this mine will reduce the grade of ore from 0.3g/t to 0.28g/t which is below cutoff grade and will not be able to return a profit. This block will be considered as waste after 10% dilution. Table 1 – Effect of

Get price

HEAP LEACHING TECHNIQUE in MINING Euromines

Figure 1 – Relationship Between Excavation Quantity and Average Grade of Mined Ore as a function of "cutoff grade" (modified from McNab, B., 2006) In response to global increases in metal commodity prices, the low grade base metal and precious metal ores (<1% copper, <1g/ton gold, < 0.5% nickel) previously considered uneconomical,

Get price

mining part ii d32ogoqmya1dw8.cloudfront.net

The cutoff grade of an ore is essentially the lowest grade of an ore that is worth mining. If the ore grade is less than the cutoff grade, then a mining company will not make money mining that ore. According to Fellows (2010), the cutoff grade of an ore is one of the main factors in determining the economics of the mine.

Get price

Porphyry Copper & Grade MarketCapMarketCap

Mar 22, 2011 · So: would you rather have Escondida, or a few million tonnes of 5% copper, perhaps with a bit of zinc and other metallurgically annoying stuff? This leads to a second benefit, porphyry mineralisation is typically evenly distributed and best defined by a cutoff grade rather than a vein margin, footwall or similar in other types of copper deposits.

Get price

Making the grade: understanding exploration results

Mar 24, 2017 · COPPER: 10% copper would be very highgrade, but very often copper occurs with other base and precious metals, so I would consider a value of 5% copper

Get price

Decreasing Ore Grades in Global Metallic Mining: A

Decreasing Ore Grades in Global Metallic Mining: A Theoretical Issue or a Global Reality? Guiomar Calvo 1,*, Gavin Mudd 2, the study has shown that the average copper ore grade is decreasing over time, while the Copper is currently mined using both underground and open cut

Get price

Chino mine Wikipedia

The Chino Mine ("Chino" is Spanish for the "Chinaman"), also known as the Santa Rita mine, is an openpit copper mine loed in the town of Santa Rita, New Mexico 15 miles (24 km) east of Silver City.The mine was started as the Chino Copper Company in 1909 by mining engineer John M. Sully and Spencer Penrose, and is currently owned and operated by FreeportMcMoRan Inc. subsidiaries.

Get price

Resource and Ore Reserve Statements panaust.com.au

2014 Mineral Resource and Ore Reserve Statements 2012 is the appliion of a higher copper cut‐off grade. The increase in copper cut‐off grade from. Page 3 compared with the Phu Kham Mineral Resource as at 31 December 2012 and contained copper

Get price

Mining Valuation Lesson: CutOff Grade Theory and Practice

That means that the higher the cutoff grade, there is even a possibility that the NPV would be negative as the mine life and recoverable ore becomes too small. The important factor is selecting the cutoff grade that yields the highest NPV. In our table, that means selecting the 2.5 grams per tonne cutoff grade.

Get price

In mining, what do you mean when you say "cutoff grade

Sep 05, 2006 · Best Answer: Assay results are the actual results of analysis of ''ore'' samples that will tell you, for instance if you have ONE ounce of Gold per Ton of ore, or onehalf oz. of silver, or 2% copper. These tests are reliable, reproducible, and determine if a given ''ore'' is actually commercially viable to mine or not. ''cutoff'' grade is the grade at which it is not feasible or economical to mine

Get price

Large Low Grade CopperGold Deposits: How Low Can Grade Go

Mar 05, 2013 · The lowest cutoff grade for milling is 0.18% copper equivalent, for crushed leach 0.12% and for ROM leach 0.05%. In 2012 the Parau mine, operated by Kinross Gold Corporation in Brazil, treated around 58 million tonnes of ore at a grade of around 0.4grams per tonne ("g/t") to produce 466,709 ounces of gold.

Get price

HEAP LEACHING TECHNIQUE in MINING Euromines

Figure 1 – Relationship Between Excavation Quantity and Average Grade of Mined Ore as a function of "cutoff grade" (modified from McNab, B., 2006) In response to global increases in metal commodity prices, the low grade base metal and precious metal ores (<1% copper, <1g/ton gold, < 0.5% nickel) previously considered uneconomical,

Get price

THE IMPORTANCE OF DILUTION FACTOR FOR OPEN PIT

tonne of ore with 0.3g/t can be sent to the mill and be expected to generate a small amount of profit. Ten percent dilution in this mine will reduce the grade of ore from 0.3g/t to 0.28g/t which is below cutoff grade and will not be able to return a profit. This block will be considered as waste after 10% dilution. Table 1 – Effect of

Get price

Learning Goals: What is an ore deposit? geo.arizona.edu

Learning Goals: What is an ore deposit? Copper grade is the concentration of copper in the ore rock. To calculate the grade of copper for the sample, geologists use the equation: The average price of copper in March 2012 was $3.60 per lb. Will the deposits be profitable? To

Get price

Porphyry Copper & Grade MarketCapMarketCap

Mar 22, 2011 · So: would you rather have Escondida, or a few million tonnes of 5% copper, perhaps with a bit of zinc and other metallurgically annoying stuff? This leads to a second benefit, porphyry mineralisation is typically evenly distributed and best defined by a cutoff grade rather than a vein margin, footwall or similar in other types of copper deposits.

Get price

Types of Copper Deposits in the World Investing News Network

For example, 1,000 kilograms of copper ore containing 300 kilograms of copper metal has a grade of 30 percent. When metal is at a much lower concentration, it may be described in terms of parts

Get price

Mining Valuation Lesson: CutOff Grade Theory And Practice

Dec 05, 2011 · Cutoff Grade Theory and Practice While we have reduced the tonnage above the cutoff by removing the uneconomical 6% of ore, the remaining average grade will have increased as the lower grade

Get price

CutOff Grades For Mineral Resource Reporting SRK

A cutoff grade (COG) is an industryaccepted standard expression used to determine what part of a mineral deposit to include in a mineral resource estimate (MRE). For MRE reporting, COGs tend to be rounded down to ensure that material of no economic significance is excluded from the resource.

Get price

Determination of optimum cutoff grades of multiple metal

In open pit mines, cutoff grade is used to discriminate ore from waste. It is one of the most crucial decisions that must be faced by mine engineers. If the mineral grade is equal to or above cutoff grade, the material is classified as ore and if the grade of mineral is less than the cutoff grade, the material is classified as waste.

Get price

Porphyry Copper & Grade MarketCapMarketCap

Mar 22, 2011 · So: would you rather have Escondida, or a few million tonnes of 5% copper, perhaps with a bit of zinc and other metallurgically annoying stuff? This leads to a second benefit, porphyry mineralisation is typically evenly distributed and best defined by a cutoff grade rather than a vein margin, footwall or similar in other types of copper deposits.

Get price

The key drivers behind resource growth: an analysis of the

The key drivers behind resource growth: an analysis of the copper industry over the last 100 years Richard Schodde Managing Director, MinEx Consulting 2010 MEMS Conference Mineral and Metal Markets over the Long Term Joint Program with the SME annual meeting in Phoenix, March 3 2010

Get price

The world''s top 10 highestgrade copper mines – MINING.COM

First Quantum''s CLC copper deposit is exceptionally rich, and with ore reserves grading 5% copper it is believed to be the highestgrade openpit active copper mine worldwide.

Get price

Geology for Investors Make sense of mining company

Geology for Investors. Make Sense of Mining Company Investments. Exclusive evaluations and opinion of junior mining company projects, important and emerging mining and exploration districts. We provide reviews of current exploration and mining projects as well

Get price

Part Three Resources and Technology Princeton University

geology of copper–the kinds of copper minerals, how they formed, and where they are found. The chapter then discusses current world copper resources, and the copper content (or ore grade) of current mine production. The relations between ore grades, tonnages, and production costs are discussed in chapter 9. I Brian j.

Get price

CutOff Grades For Mineral Resource Reporting SRK

A cutoff grade (COG) is an industryaccepted standard expression used to determine what part of a mineral deposit to include in a mineral resource estimate (MRE). For MRE reporting, COGs tend to be rounded down to ensure that material of no economic significance is excluded from the resource.

Get price

Grade Tonnage Curve: How Far Can It Be Relied Upon?

Grade Tonnage Curve: How Far Can It Be Relied Upon? FRANCISCO SILVA 1 and AMÍLCAR SOARES 2 1 Somincor face of variations of the cutoff grade. The main economic metal present in the ore is copper and the mineralization can be

Get price

What is cutoff grade? An introduction to overlooked yet

A cutoff grade is proposed, and then the parameters of the deposit are calculated, and tested against economic scenarios. If it fails the process is started again with a different cutoff grade. In some cases it may never work. In summary, cutoff grade is one of the most important, yet least understood variables for making an investment decision.

Get price

A heuristic approach to stochastic cutoff grade

A heuristic approach to stochastic cutoff grade optimization for open pit mining complexes with multiple processing streams. and highgrade copper ore shows a difference of 13.83% between the minimum and maximum NPV generated through a set of fifteen (15) equally probable grade–tonnage curves. A. NietoDetermination of optimal cutoff

Get price

CODELCO: RECENT DEVELOPMENTS AND PERSPECTIVES

Copper price c/lb *: Year 2016 until February 15th. 50 100 150 200 250 300 350 400 450 500 2004 2006 2008 2010 2012 2014 2016 COPPER PRICE: 20042016* Since 2011, the price of copper has shown a downward trend, which has intensified in recent times •Increasing in world copper production has temporary turned the market into a

Get price

The key drivers behind resource growth: an analysis of the

The key drivers behind resource growth: an analysis of the copper industry over the last 100 years Richard Schodde Managing Director, MinEx Consulting 2010 MEMS Conference Mineral and Metal Markets over the Long Term Joint Program with the SME annual meeting in Phoenix, March 3 2010

Get price

Extractive Metallurgy of Copper 5th Edition

This multiauthor new edition revises and updates the classic reference by William G. Davenport et al (winner of, among other awards, the 2003 AIME Mineral Industry Eduor of the Year Award "for inspiring students in the pursuit of clarity"), providing fully updated coverage of the copper production process, encompassing topics as diverse as environmental technology for wind and solar energy

Get price

mining part ii d32ogoqmya1dw8.cloudfront.net

The cutoff grade of an ore is essentially the lowest grade of an ore that is worth mining. If the ore grade is less than the cutoff grade, then a mining company will not make money mining that ore. According to Fellows (2010), the cutoff grade of an ore is one of the main factors in determining the economics of the mine.

Get price

pdfs.semanticscholar.org

pdfs.semanticscholar.org

Get price

Part Four Competitiveness Princeton University

Part Four Competitiveness ore than the net tonnage of copper in the ore.5 A tonne of lean ore requires no more capital, energy, labor, and supplies to mine than a tonne change the cutoff grade (the lowest grade that is mined and treated). These are

Get price

(PDF) Stripping Ratios, Pit Limits & Cutoff Grade

CHAPTER 8 Stripping Ratios, Pit Limits & Cutoff Grade Optimization Dr. Teuku Andika R Putra USM 2014 Stripping Ratios The stripping ratio (SR) refers to the amount of waste that must be removed for a given quantity of ore in open pit mining.

Get price

THE IMPORTANCE OF DILUTION FACTOR FOR OPEN PIT

tonne of ore with 0.3g/t can be sent to the mill and be expected to generate a small amount of profit. Ten percent dilution in this mine will reduce the grade of ore from 0.3g/t to 0.28g/t which is below cutoff grade and will not be able to return a profit. This block will be considered as waste after 10% dilution. Table 1 – Effect of

Get price

HEAP LEACHING TECHNIQUE in MINING Euromines

Figure 1 – Relationship Between Excavation Quantity and Average Grade of Mined Ore as a function of "cutoff grade" (modified from McNab, B., 2006) In response to global increases in metal commodity prices, the low grade base metal and precious metal ores (<1% copper, <1g/ton gold, < 0.5% nickel) previously considered uneconomical,

Get price

mining part ii d32ogoqmya1dw8.cloudfront

The cutoff grade of an ore is essentially the lowest grade of an ore that is worth mining. If the ore grade is less than the cutoff grade, then a mining company will not make money mining that ore. According to Fellows (2010), the cutoff grade of an ore is one of the main factors in determining the economics of the mine.

Get price

Porphyry Copper & Grade MarketCapMarketCap

Mar 22, 2011 · So: would you rather have Escondida, or a few million tonnes of 5% copper, perhaps with a bit of zinc and other metallurgically annoying stuff? This leads to a second benefit, porphyry mineralisation is typically evenly distributed and best defined by a cutoff grade rather than a vein margin, footwall or similar in other types of copper deposits.

Get price

Making the grade: understanding exploration results

Mar 24, 2017 · COPPER: 10% copper would be very highgrade, but very often copper occurs with other base and precious metals, so I would consider a value of 5% copper

Get price

Decreasing Ore Grades in Global Metallic Mining: A

Decreasing Ore Grades in Global Metallic Mining: A Theoretical Issue or a Global Reality? Guiomar Calvo 1,*, Gavin Mudd 2, the study has shown that the average copper ore grade is decreasing over time, while the Copper is currently mined using both underground and open cut

Get price

Chino mine Wikipedia

The Chino Mine ("Chino" is Spanish for the "Chinaman"), also known as the Santa Rita mine, is an openpit copper mine loed in the town of Santa Rita, New Mexico 15 miles (24 km) east of Silver City.The mine was started as the Chino Copper Company in 1909 by mining engineer John M. Sully and Spencer Penrose, and is currently owned and operated by FreeportMcMoRan Inc. subsidiaries.

Get price

Resource and Ore Reserve Statements panaust .au

2014 Mineral Resource and Ore Reserve Statements 2012 is the appliion of a higher copper cut‐off grade. The increase in copper cut‐off grade from. Page 3 compared with the Phu Kham Mineral Resource as at 31 December 2012 and contained copper

Get price

Mining Valuation Lesson: CutOff Grade Theory and Practice

That means that the higher the cutoff grade, there is even a possibility that the NPV would be negative as the mine life and recoverable ore becomes too small. The important factor is selecting the cutoff grade that yields the highest NPV. In our table, that means selecting the 2.5 grams per tonne cutoff grade.

Get price

In mining, what do you mean when you say "cutoff grade

Sep 05, 2006 · Best Answer: Assay results are the actual results of analysis of ''ore'' samples that will tell you, for instance if you have ONE ounce of Gold per Ton of ore, or onehalf oz. of silver, or 2% copper. These tests are reliable, reproducible, and determine if a given ''ore'' is actually commercially viable to mine or not. ''cutoff'' grade is the grade at which it is not feasible or economical to mine

Get price

Large Low Grade CopperGold Deposits: How Low Can Grade Go

Mar 05, 2013 · The lowest cutoff grade for milling is 0.18% copper equivalent, for crushed leach 0.12% and for ROM leach 0.05%. In 2012 the Parau mine, operated by Kinross Gold Corporation in Brazil, treated around 58 million tonnes of ore at a grade of around 0.4grams per tonne ("g/t") to produce 466,709 ounces of gold.

Get price

HEAP LEACHING TECHNIQUE in MINING Euromines

Figure 1 – Relationship Between Excavation Quantity and Average Grade of Mined Ore as a function of "cutoff grade" (modified from McNab, B., 2006) In response to global increases in metal commodity prices, the low grade base metal and precious metal ores (<1% copper, <1g/ton gold, < 0.5% nickel) previously considered uneconomical,

Get price

THE IMPORTANCE OF DILUTION FACTOR FOR OPEN PIT

tonne of ore with 0.3g/t can be sent to the mill and be expected to generate a small amount of profit. Ten percent dilution in this mine will reduce the grade of ore from 0.3g/t to 0.28g/t which is below cutoff grade and will not be able to return a profit. This block will be considered as waste after 10% dilution. Table 1 – Effect of

Get price

Learning Goals: What is an ore deposit? geo.arizona.edu

Learning Goals: What is an ore deposit? Copper grade is the concentration of copper in the ore rock. To calculate the grade of copper for the sample, geologists use the equation: The average price of copper in March 2012 was $3.60 per lb. Will the deposits be profitable? To

Get price

Porphyry Copper & Grade MarketCapMarketCap

Mar 22, 2011 · So: would you rather have Escondida, or a few million tonnes of 5% copper, perhaps with a bit of zinc and other metallurgically annoying stuff? This leads to a second benefit, porphyry mineralisation is typically evenly distributed and best defined by a cutoff grade rather than a vein margin, footwall or similar in other types of copper deposits.

Get price

Types of Copper Deposits in the World Investing News Network

For example, 1,000 kilograms of copper ore containing 300 kilograms of copper metal has a grade of 30 percent. When metal is at a much lower concentration, it may be described in terms of parts

Get price

Mining Valuation Lesson: CutOff Grade Theory And Practice

Dec 05, 2011 · Cutoff Grade Theory and Practice While we have reduced the tonnage above the cutoff by removing the uneconomical 6% of ore, the remaining average grade will have increased as the lower grade

Get price

CutOff Grades For Mineral Resource Reporting SRK

A cutoff grade (COG) is an industryaccepted standard expression used to determine what part of a mineral deposit to include in a mineral resource estimate (MRE). For MRE reporting, COGs tend to be rounded down to ensure that material of no economic significance is excluded from the resource.

Get price

Determination of optimum cutoff grades of multiple metal

In open pit mines, cutoff grade is used to discriminate ore from waste. It is one of the most crucial decisions that must be faced by mine engineers. If the mineral grade is equal to or above cutoff grade, the material is classified as ore and if the grade of mineral is less than the cutoff grade, the material is classified as waste.

Get price

Porphyry Copper & Grade MarketCapMarketCap

Mar 22, 2011 · So: would you rather have Escondida, or a few million tonnes of 5% copper, perhaps with a bit of zinc and other metallurgically annoying stuff? This leads to a second benefit, porphyry mineralisation is typically evenly distributed and best defined by a cutoff grade rather than a vein margin, footwall or similar in other types of copper deposits.

Get price

The key drivers behind resource growth: an analysis of the

The key drivers behind resource growth: an analysis of the copper industry over the last 100 years Richard Schodde Managing Director, MinEx Consulting 2010 MEMS Conference Mineral and Metal Markets over the Long Term Joint Program with the SME annual meeting in Phoenix, March 3 2010

Get price

The world''s top 10 highestgrade copper mines – MINING

First Quantum''s CLC copper deposit is exceptionally rich, and with ore reserves grading 5% copper it is believed to be the highestgrade openpit active copper mine worldwide.

Get price

Geology for Investors Make sense of mining company

Geology for Investors. Make Sense of Mining Company Investments. Exclusive evaluations and opinion of junior mining company projects, important and emerging mining and exploration districts. We provide reviews of current exploration and mining projects as well

Get price

Part Three Resources and Technology Princeton University

geology of copper–the kinds of copper minerals, how they formed, and where they are found. The chapter then discusses current world copper resources, and the copper content (or ore grade) of current mine production. The relations between ore grades, tonnages, and production costs are discussed in chapter 9. I Brian j.

Get price

CutOff Grades For Mineral Resource Reporting SRK

A cutoff grade (COG) is an industryaccepted standard expression used to determine what part of a mineral deposit to include in a mineral resource estimate (MRE). For MRE reporting, COGs tend to be rounded down to ensure that material of no economic significance is excluded from the resource.

Get price

Grade Tonnage Curve: How Far Can It Be Relied Upon?

Grade Tonnage Curve: How Far Can It Be Relied Upon? FRANCISCO SILVA 1 and AMÍLCAR SOARES 2 1 Somincor face of variations of the cutoff grade. The main economic metal present in the ore is copper and the mineralization can be

Get price

What is cutoff grade? An introduction to overlooked yet

A cutoff grade is proposed, and then the parameters of the deposit are calculated, and tested against economic scenarios. If it fails the process is started again with a different cutoff grade. In some cases it may never work. In summary, cutoff grade is one of the most important, yet least understood variables for making an investment decision.

Get price

A heuristic approach to stochastic cutoff grade

A heuristic approach to stochastic cutoff grade optimization for open pit mining complexes with multiple processing streams. and highgrade copper ore shows a difference of 13.83% between the minimum and maximum NPV generated through a set of fifteen (15) equally probable grade–tonnage curves. A. NietoDetermination of optimal cutoff

Get price

CODELCO: RECENT DEVELOPMENTS AND PERSPECTIVES

Copper price c/lb *: Year 2016 until February 15th. 50 100 150 200 250 300 350 400 450 500 2004 2006 2008 2010 2012 2014 2016 COPPER PRICE: 20042016* Since 2011, the price of copper has shown a downward trend, which has intensified in recent times •Increasing in world copper production has temporary turned the market into a

Get price

The key drivers behind resource growth: an analysis of the

The key drivers behind resource growth: an analysis of the copper industry over the last 100 years Richard Schodde Managing Director, MinEx Consulting 2010 MEMS Conference Mineral and Metal Markets over the Long Term Joint Program with the SME annual meeting in Phoenix, March 3 2010

Get price

Extractive Metallurgy of Copper 5th Edition

This multiauthor new edition revises and updates the classic reference by William G. Davenport et al (winner of, among other awards, the 2003 AIME Mineral Industry Eduor of the Year Award "for inspiring students in the pursuit of clarity"), providing fully updated coverage of the copper production process, encompassing topics as diverse as environmental technology for wind and solar energy

Get price

mining part ii d32ogoqmya1dw8.cloudfront

The cutoff grade of an ore is essentially the lowest grade of an ore that is worth mining. If the ore grade is less than the cutoff grade, then a mining company will not make money mining that ore. According to Fellows (2010), the cutoff grade of an ore is one of the main factors in determining the economics of the mine.

Get price

pdfs.semanticscholar

pdfs.semanticscholar

Get price

Part Four Competitiveness Princeton University

Part Four Competitiveness ore than the net tonnage of copper in the ore.5 A tonne of lean ore requires no more capital, energy, labor, and supplies to mine than a tonne change the cutoff grade (the lowest grade that is mined and treated). These are

Get price

(PDF) Stripping Ratios, Pit Limits & Cutoff Grade

CHAPTER 8 Stripping Ratios, Pit Limits & Cutoff Grade Optimization Dr. Teuku Andika R Putra USM 2014 Stripping Ratios The stripping ratio (SR) refers to the amount of waste that must be removed for a given quantity of ore in open pit mining.

Get price