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Calculation of Ore Tonnage Grade from Drill hole

Jan 21, 2016  In Fig. 4, this method gives the trapezoid a content of 48,250.35 metric tons of copper, or an average grade of 1.535 per cent., an assay difference between the two of 0.095 per cent, as against a difference of 0.609 per cent, when the prisms were calculated by the standard method.Jan 21, 2016  In Fig. 4, this method gives the trapezoid a content of 48,250.35 metric tons of copper, or an average grade of 1.535 per cent., an assay difference between the two of 0.095 per cent, as against a difference of 0.609 per cent, when the prisms were calculated by the standard method.

Some observations on copper yields and ore grades ...

Mar 01, 2012  The clustering of mine openings in the 1990s helps explain why global average grades remained fairly stable during that period. By the mid 2000s, when there were relatively few new mine openings, the average grades of the previous decade's start-ups were declining.Mar 01, 2012  The clustering of mine openings in the 1990s helps explain why global average grades remained fairly stable during that period. By the mid 2000s, when there were relatively few new mine openings, the average grades of the previous decade's start-ups were declining.

Making the grade: understanding exploration results ...

Mar 24, 2017  The most well-known example of narrow high-grade is in Goldcorp’s Red Lake, Ontario mine where gold grades of 18-20 grams gold/tonne are being mined from its deep workings.Mar 24, 2017  The most well-known example of narrow high-grade is in Goldcorp’s Red Lake, Ontario mine where gold grades of 18-20 grams gold/tonne are being mined from its deep workings.

Copper extraction - Wikipedia

The average grade of copper ores in the 21st century is below 0.6% copper, with a proportion of economic ore minerals (including copper) being less than 2% of the total volume of the ore rock. A key objective in the metallurgical treatment of any ore is the separation of The average grade of copper ores in the 21st century is below 0.6% copper, with a proportion of economic ore minerals (including copper) being less than 2% of the total volume of the ore rock. A key objective in the metallurgical treatment of any ore is the separation of

The world’s top 10 highest-grade copper mines -

Feb 20, 2017  Antas is a high-grade, low-cost copper mine with gold byproduct credits and significant exploration potential. 2.5% copper grade in reserves puts this mine fifth on Feb 20, 2017  Antas is a high-grade, low-cost copper mine with gold byproduct credits and significant exploration potential. 2.5% copper grade in reserves puts this mine fifth on

Mineral Deposit Value - How to Calculate the Potential ...

Average Grade: The concentration of a mineral in the ore body (i.e. % or g/t) 2% copper and 1.5 gram per tonne gold: Strike Length: The length in which the mineralization is found in the ore body (horizontally) 500 meters: Depth: The depth in which the mineralization is found in the ore body (vertically) 200 meters: WidthAverage Grade: The concentration of a mineral in the ore body (i.e. % or g/t) 2% copper and 1.5 gram per tonne gold: Strike Length: The length in which the mineralization is found in the ore body (horizontally) 500 meters: Depth: The depth in which the mineralization is found in the ore body (vertically) 200 meters: Width

Ore Reserve Estimation Method

Mar 24, 2017  If, in this example, equal weight is given to the products (width times grade) for all the samples, including the raise samples, the tonnage (using a factor of 12 cubic feet per ton) will be 17,812, the average grade $7.98 per ton, and the total value of the ore in the block $142,140.Mar 24, 2017  If, in this example, equal weight is given to the products (width times grade) for all the samples, including the raise samples, the tonnage (using a factor of 12 cubic feet per ton) will be 17,812, the average grade $7.98 per ton, and the total value of the ore in the block $142,140.

Understanding Cut-Off Grade 4 (Tonnage, Grade, and Costs ...

Feb 17, 2018  The cut-off grade is therefore a minimum threshold and all blocks of material in your deposit or mine with a grade (value) above this threshold will generate some profit. ... Cu grade - Feb 17, 2018  The cut-off grade is therefore a minimum threshold and all blocks of material in your deposit or mine with a grade (value) above this threshold will generate some profit. ... Cu grade -

average abundance of copper in ores jordan

2009-3-17 Average Abundance of Ore Metals in Earth ’ s Crust 71 ppm Zinc (Zn) 5.5 ppm Tin (Sn) 20 ppm Lead (Pb) 20 ppm Nickel (Ni) 350000 ppm Iron (Fe) 25 ppm Copper (Cu).002 ppm Gold (Au).050 ppm Silver (Ag) Average Abundance in the Crust the Crust Metal ppm = parts per million = grams per tonne Types of Metals Base Metals Metals that ...2009-3-17 Average Abundance of Ore Metals in Earth ’ s Crust 71 ppm Zinc (Zn) 5.5 ppm Tin (Sn) 20 ppm Lead (Pb) 20 ppm Nickel (Ni) 350000 ppm Iron (Fe) 25 ppm Copper (Cu).002 ppm Gold (Au).050 ppm Silver (Ag) Average Abundance in the Crust the Crust Metal ppm = parts per million = grams per tonne Types of Metals Base Metals Metals that ...

Copper KGHM Corporate Website

With an average ore grade of 1.6% copper, KGHM produces approximately 700 thousand tonnes of red metal. The core products of KGHM are electrolytic copper cathodes with minimum 99.99% of copper content. What is more, the company processes ore to obtain concentrate and metallic copper in the form of wire rod, Cu-OFE and Cu-Ag wire and granules.With an average ore grade of 1.6% copper, KGHM produces approximately 700 thousand tonnes of red metal. The core products of KGHM are electrolytic copper cathodes with minimum 99.99% of copper content. What is more, the company processes ore to obtain concentrate and metallic copper in the form of wire rod, Cu-OFE and Cu-Ag wire and granules.

Copper extraction - Wikipedia

The average grade of copper ores in the 21st century is below 0.6% copper, with a proportion of economic ore minerals (including copper) being less than 2% of the total volume of the ore rock. A key objective in the metallurgical treatment of any ore is the separation of The average grade of copper ores in the 21st century is below 0.6% copper, with a proportion of economic ore minerals (including copper) being less than 2% of the total volume of the ore rock. A key objective in the metallurgical treatment of any ore is the separation of

Mineral Deposit Value - How to Calculate the Potential ...

Average Grade: The concentration of a mineral in the ore body (i.e. % or g/t) 2% copper and 1.5 gram per tonne gold: Strike Length: The length in which the mineralization is found in the ore body (horizontally) 500 meters: Depth: The depth in which the mineralization is found in the ore body (vertically) 200 meters: WidthAverage Grade: The concentration of a mineral in the ore body (i.e. % or g/t) 2% copper and 1.5 gram per tonne gold: Strike Length: The length in which the mineralization is found in the ore body (horizontally) 500 meters: Depth: The depth in which the mineralization is found in the ore body (vertically) 200 meters: Width

Copper Ore - an overview ScienceDirect Topics

Copper complexes that can be present in cyanide liquors include Cu (CN) 2 −, Cu (CN) 3 2 −, and Cu (CN) 4 3 − with the proportions dependent on the pH, copper concentration, and free cyanide concentration. The main issue facing the process engineer is the fact that minimization of cyanide consumption is favored by the formation of species with a low copper:cyanide mole ratio, e.g., Cu ...Copper complexes that can be present in cyanide liquors include Cu (CN) 2 −, Cu (CN) 3 2 −, and Cu (CN) 4 3 − with the proportions dependent on the pH, copper concentration, and free cyanide concentration. The main issue facing the process engineer is the fact that minimization of cyanide consumption is favored by the formation of species with a low copper:cyanide mole ratio, e.g., Cu ...

EXPLORATION AND DEVELOPMENT AT THE PAST

Ni-Cu Mine. 962 SHAKESPEARE HIGHLIGHTS 490,000 tonnes of ore was processed through a third-party mill at an average grade of 0.33% Ni, 0.38% Cu and 0.9 g/t PGM + Au between May 2010 and February 2012. Major permits are already in place for the construction of a 4,500 tpd openNi-Cu Mine. 962 SHAKESPEARE HIGHLIGHTS 490,000 tonnes of ore was processed through a third-party mill at an average grade of 0.33% Ni, 0.38% Cu and 0.9 g/t PGM + Au between May 2010 and February 2012. Major permits are already in place for the construction of a 4,500 tpd open

Break Even Analysis - How to Calculate the Cut Off Grade ...

Cut-Off Grade (percentage per tonne) $ 33. $ 3. ($ 33 / $ 3 =) 11 pounds / tonne. ( (11 / 22) x 1% =) 0.50 percentage /tonne. Note: When the cost price per tonne can not be found in the mining company’s feasibility study, I kindly ask the mining company’s management to give me their best estimate. In order to be extra conservative in my ...Cut-Off Grade (percentage per tonne) $ 33. $ 3. ($ 33 / $ 3 =) 11 pounds / tonne. ( (11 / 22) x 1% =) 0.50 percentage /tonne. Note: When the cost price per tonne can not be found in the mining company’s feasibility study, I kindly ask the mining company’s management to give me their best estimate. In order to be extra conservative in my ...

Bingham Canyon, Copper Mine, Utah, USA

As of December 2019, the mine had 612Mt of Cu, 612Mt of Au, 612Mt of Ag, 612Mt of Mo in the proven and probable reserves category totalled 524Mt grading 0.43% Cu, 0.16g/t Au, 2.04g/t Ag, and 0.03% Mo. Open-pit mining at Bingham Canyon. The Bingham Canyon pit is now 2.5 miles-wide and very deep.As of December 2019, the mine had 612Mt of Cu, 612Mt of Au, 612Mt of Ag, 612Mt of Mo in the proven and probable reserves category totalled 524Mt grading 0.43% Cu, 0.16g/t Au, 2.04g/t Ag, and 0.03% Mo. Open-pit mining at Bingham Canyon. The Bingham Canyon pit is now 2.5 miles-wide and very deep.

Common Basic Formulas for Mineral Processing Calculations

Mar 20, 2016  where R represents the ratio: % Pb in crude ore/% Cu in crude ore Formula (32) is very convenient for milling calculations on ores of this type. Example: An ore contains 5% lead and 1% copper. The ratio of perfect concentration for a concentrate of maximum grade and 100% recoveries of lead and copper would be:Mar 20, 2016  where R represents the ratio: % Pb in crude ore/% Cu in crude ore Formula (32) is very convenient for milling calculations on ores of this type. Example: An ore contains 5% lead and 1% copper. The ratio of perfect concentration for a concentrate of maximum grade and 100% recoveries of lead and copper would be:

The ten highest-grade copper mines in the world

Feb 01, 2019  Well, grade is just another way of talking about the weight of copper. For example, if you mine 1 000 kilograms of rock, and 30 kilograms is made up of copper, then the average grade would be 3%. The global average grade of copper ores today is about 0.6% (meaning for every 1 000 kilograms of rock mined six kilograms will be copper).Feb 01, 2019  Well, grade is just another way of talking about the weight of copper. For example, if you mine 1 000 kilograms of rock, and 30 kilograms is made up of copper, then the average grade would be 3%. The global average grade of copper ores today is about 0.6% (meaning for every 1 000 kilograms of rock mined six kilograms will be copper).

What is cut-off grade? An introduction to overlooked yet ...

May 15, 2018  If cut-off grade is set too low, then there is overcapacity and equipment meant for a 40,000 tonne a day mine, is expensively underused at 20,000 tonnes a day. Moreover, mines are expected to last a certain number of years, to pay off their capital costs, and return capital to May 15, 2018  If cut-off grade is set too low, then there is overcapacity and equipment meant for a 40,000 tonne a day mine, is expensively underused at 20,000 tonnes a day. Moreover, mines are expected to last a certain number of years, to pay off their capital costs, and return capital to

Cut-off grade estimation - QueensMineDesignWiki

Cut-Off grade is the minimum grade required in order for a mineral or metal to be economically mined (or processed). Material found to be above this grade is considered to be ore, while material below this grade is considered to be waste. Although in a variety of Cut-Off grade is the minimum grade required in order for a mineral or metal to be economically mined (or processed). Material found to be above this grade is considered to be ore, while material below this grade is considered to be waste. Although in a variety of

Impurities in Copper Raw Materials and Regulatory

Global average copper ore grade 0.45 % Cu in reserves reported and 0.65% Cu in 2015 mine production (ICSG-rmit.au 2018) Global weighted average of copper concentrate output, around 25 % Cu based on reported 2015 data (ICSG-RMIT 2018)Global average copper ore grade 0.45 % Cu in reserves reported and 0.65% Cu in 2015 mine production (ICSG-rmit.au 2018) Global weighted average of copper concentrate output, around 25 % Cu based on reported 2015 data (ICSG-RMIT 2018)

Copper Handbook - World Bank

Average Grade: Survey A2.... I - 6 I-4 Lifetime of Copper Reserves as of 1960 and 1976 .I - 7 II-1 Copper - Mine Production, by Economic Regions and Main Contries .I1 - 2 II-2 Copper - Mine, Smelter and Refinery Production in Developing Countries in 1965, and 199 .II - 4 II-3 Refined Copper Production by Economic RegionsAverage Grade: Survey A2.... I - 6 I-4 Lifetime of Copper Reserves as of 1960 and 1976 .I - 7 II-1 Copper - Mine Production, by Economic Regions and Main Contries .I1 - 2 II-2 Copper - Mine, Smelter and Refinery Production in Developing Countries in 1965, and 199 .II - 4 II-3 Refined Copper Production by Economic Regions

Some observations on copper yields and ore grades ...

Mar 01, 2012  The clustering of mine openings in the 1990s helps explain why global average grades remained fairly stable during that period. By the mid 2000s, when there were relatively few new mine openings, the average grades of the previous decade's start-ups were declining.Mar 01, 2012  The clustering of mine openings in the 1990s helps explain why global average grades remained fairly stable during that period. By the mid 2000s, when there were relatively few new mine openings, the average grades of the previous decade's start-ups were declining.

Impurities in Copper Raw Materials and Regulatory

Global average copper ore grade 0.45 % Cu in reserves reported and 0.65% Cu in 2015 mine production (ICSG-rmit.au 2018) Global weighted average of copper concentrate output, around 25 % Cu based on reported 2015 data (ICSG-RMIT 2018)Global average copper ore grade 0.45 % Cu in reserves reported and 0.65% Cu in 2015 mine production (ICSG-rmit.au 2018) Global weighted average of copper concentrate output, around 25 % Cu based on reported 2015 data (ICSG-RMIT 2018)

Break Even Analysis - How to Calculate the Cut Off Grade ...

Cut-Off Grade (percentage per tonne) $ 33. $ 3. ($ 33 / $ 3 =) 11 pounds / tonne. ( (11 / 22) x 1% =) 0.50 percentage /tonne. Note: When the cost price per tonne can not be found in the mining company’s feasibility study, I kindly ask the mining company’s management to give me their best estimate. In order to be extra conservative in my ...Cut-Off Grade (percentage per tonne) $ 33. $ 3. ($ 33 / $ 3 =) 11 pounds / tonne. ( (11 / 22) x 1% =) 0.50 percentage /tonne. Note: When the cost price per tonne can not be found in the mining company’s feasibility study, I kindly ask the mining company’s management to give me their best estimate. In order to be extra conservative in my ...

EXPLORATION AND DEVELOPMENT AT THE PAST

Ni-Cu Mine. 962 SHAKESPEARE HIGHLIGHTS 490,000 tonnes of ore was processed through a third-party mill at an average grade of 0.33% Ni, 0.38% Cu and 0.9 g/t PGM + Au between May 2010 and February 2012. Major permits are already in place for the construction of a 4,500 tpd openNi-Cu Mine. 962 SHAKESPEARE HIGHLIGHTS 490,000 tonnes of ore was processed through a third-party mill at an average grade of 0.33% Ni, 0.38% Cu and 0.9 g/t PGM + Au between May 2010 and February 2012. Major permits are already in place for the construction of a 4,500 tpd open

Cominco Copper Mine, Highland Valley, British Columbia ...

Highland Valley is a low-grade (0.4% Cu) porphyry copper-molybdenum deposit associated with the younger intrusive phases of the early to mid-jurassic, calc-alkaline Guichon Creek batholith. As of the end of 2005, proven and probable ore reserves totalled 318Mt Highland Valley is a low-grade (0.4% Cu) porphyry copper-molybdenum deposit associated with the younger intrusive phases of the early to mid-jurassic, calc-alkaline Guichon Creek batholith. As of the end of 2005, proven and probable ore reserves totalled 318Mt

Copper Ore - an overview ScienceDirect Topics

The mine commissioned in 1996 is designed to produce 22,500 tons/year using acid cure and agglomeration prior to bioleaching and using SEW-EW for ores containing about 0.6% Cu. Dos Amigos This is the smallest bioleach SEX-EW operation in Chile using acid curing and agglomeration started since 1997 and expanded in 1999 to produce 10,000 tons ...The mine commissioned in 1996 is designed to produce 22,500 tons/year using acid cure and agglomeration prior to bioleaching and using SEW-EW for ores containing about 0.6% Cu. Dos Amigos This is the smallest bioleach SEX-EW operation in Chile using acid curing and agglomeration started since 1997 and expanded in 1999 to produce 10,000 tons ...

Economic Filters for Evaluating Porphyry Copper Deposit ...

relations of tonnage and ore grades of a group of well-explored deposits that belong to the mineral deposit type being modeled. The data include the average grades of metals and mineral commodities of economic interest and associated tonnage based on the total production, reserves, and resources at the lowest possible cutoff grade for each deposit.relations of tonnage and ore grades of a group of well-explored deposits that belong to the mineral deposit type being modeled. The data include the average grades of metals and mineral commodities of economic interest and associated tonnage based on the total production, reserves, and resources at the lowest possible cutoff grade for each deposit.

Global copper mines based on capacity 2021 Statista

Nov 02, 2021  The Escondida mine in Chile is the world's largest copper mine based on capacity, with a capacity of some 1.5 million metric tons. ... LME price for high-grade copper 2000-2020; Average Nov 02, 2021  The Escondida mine in Chile is the world's largest copper mine based on capacity, with a capacity of some 1.5 million metric tons. ... LME price for high-grade copper 2000-2020; Average

Grasberg Open Pit Copper Mine, Tembagapura, Irian Jaya ...

This is a high-grade resource, with averages of 1.5% copper and 2g/t gold. There is also a third intrusive stage, associated with the South Kali Dykes, which was the final intrusion and the most weakly mineralised. Mining at Grasberg Open Pit. The workings comprise an open-pit mine, an underground mine and four concentrators.This is a high-grade resource, with averages of 1.5% copper and 2g/t gold. There is also a third intrusive stage, associated with the South Kali Dykes, which was the final intrusion and the most weakly mineralised. Mining at Grasberg Open Pit. The workings comprise an open-pit mine, an underground mine and four concentrators.

Copper Mining and Extraction Sulfide Ores

Copper can be extracted from its ore by: Underground: sinking a vertical shaft into the Earth to an appropriate depth and driving horizontal tunnels into the ore. Open pit: 90% of ore is mined by this method. Ores near the surface can be quarried after removal of the surface layers.Copper can be extracted from its ore by: Underground: sinking a vertical shaft into the Earth to an appropriate depth and driving horizontal tunnels into the ore. Open pit: 90% of ore is mined by this method. Ores near the surface can be quarried after removal of the surface layers.

Atico Produces 4.43 Million Pounds of Cu and 2,952 Ounces

Oct 26, 2021  El Roble Mine. The El Roble mine is a high grade, underground copper and gold mine with nominal processing plant capacity of 1,000 tonnes Oct 26, 2021  El Roble Mine. The El Roble mine is a high grade, underground copper and gold mine with nominal processing plant capacity of 1,000 tonnes

Iron Ore Statistics and Information - USGS.gov

Iron Ore Statistics and Information. Iron ore is a mineral substance which, when heated in the presence of a reductant, will yield metallic iron (Fe). It almost always consists of iron oxides, the primary forms of which are magnetite (Fe 3 O 4) and hematite (Fe 2 O 3 ). Iron ore is the source of primary iron for the world's iron and steel ...Iron Ore Statistics and Information. Iron ore is a mineral substance which, when heated in the presence of a reductant, will yield metallic iron (Fe). It almost always consists of iron oxides, the primary forms of which are magnetite (Fe 3 O 4) and hematite (Fe 2 O 3 ). Iron ore is the source of primary iron for the world's iron and steel ...