current cut off grade for copper ore

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general copper ore cut off grade - true-plexatnl

The effect of copper price variations on optimum cut-off grades (mining capacity is the limiting factor), concentration cut-off grade ( ), Heap leaching cut-off grade ( ) As a result, while the objective is to maximize the net present value, leaching and concen- tration optimum cut-off grades of the hypothetical mine should decrease as copper ...

2015 Mineral Resource and Ore Reserve Summary

pit Ore Reserve is relatively insensitive to copper price with no material change to the estimated tonnage and grade at metal prices down to US$275/lb and US$1,200/oz, which approximates to the 02% copper non‐mining breakeven cut‐off grade that is applied The Ore Reserve is estimated...

Mineral Deposit Value – How to Calculate the Potential ,

The concentration of a mineral in the ore body (ie % or g/t) 2% copper and 15 gram per tonne gold: , on which I explained How to Calculate the Cut Off Grade 4 Convert the Pounds and Ounces to the Corresponding Metal Value , you can not assume that the complete ore body contains the same grade (ie 2% copper and 15 gram per tonne gold)...

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: 2004-2016* 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...

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 as ,...

SPENCE BRIEFING - BHP

estimated to be 310 million tonnes of copper ore with an average total copper grade of 114% at a total copper cut-off grade of 030% These ore reserves are divided between 79 million tonnes of heap leach oxide ore at a grade of 118% total copper and The plan above shows the final project layout...

Geology of Porphyry Copper Deposits

These are somewhat the giants of the ore deposits world As a mining interested learner, the geology of porphyry copper deposits is vital to your education Now in the first Exploration Geology Course I discussed how because our current mining technology all the metals that we use are mined from the top 4 km of the earth’s crust I also ....

Geology of Porphyry Copper Deposits

These are somewhat the giants of the ore deposits world As a mining interested learner, the geology of porphyry copper deposits is vital to your education Now in the first Exploration Geology Course I discussed how because our current mining technology all the metals that we use are mined from the top 4 km of the earth’s crust I also ....

Large Low Grade Copper-Gold Deposits: How Low Can Grade ,

Mar 05, 2013· Cut-off grade is perhaps the simplest way to understand the economics of large, low grade mining operations This is the grade above which a particular mine is profitable Freeport-McMoRan Copper & Gold Inc is the world’s largest, listed copper producer It has operations in the America’s, Indonesia and Africa...

London Metal Exchange: LME Copper

Current and historical Copper prices, stocks and monthly averag Cookie Policy We use cookies for statistical and measurement purposes, to help improve our website and provide you with a better online experience By clicking I accept you agree to such purpos You can find out more and withdraw your consent at any time...

Part Four Competitiveness - Princeton University

Part Four Competitiveness , ore than the net tonnage of copper in the ore5 A tonne of lean ore requires no more capital, energy, labor, and supplies to mine than a tonne , change the cut-off grade (the lowest grade that is mined and treated) These are ,...

Mining Valuation Lesson: Cut-Off Grade Theory And Practice

Dec 05, 2011· Cut-off Grade Theory and Practice Consider a block of ore that weighs 1 tonne and contains 3 grams of gold At a gold price of US$1000 per ounce the value of the gold in the block of ore ,...

Extractive Metallurgy of Copper - 5th Edition - Elsevier

This multi-author new edition revises and updates the classic reference by William G Davenport et al (winner of, among other awards, the 2003 AIME Mineral Industry Educator 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 ....

Cut-Off Grades For Mineral Resource Reporting | SRK

A cut-off grade (COG) is an industry-accepted 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...

Mineral Deposit Value – How to Calculate the Potential ,

The concentration of a mineral in the ore body (ie % or g/t) 2% copper and 15 gram per tonne gold: , on which I explained How to Calculate the Cut Off Grade 4 Convert the Pounds and Ounces to the Corresponding Metal Value , you can not assume that the complete ore body contains the same grade (ie 2% copper and 15 gram per tonne gold)...

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

This article about how to calculate the cut off grade is a great resource for investors in individual mining stocks However, when you are investing in mining stocks through a Stock Based mineral ETF I recommend you to read this article too For conducting a mining project's break-even analysis you first need to know about the operational expenses (OPEX)...

mining part ii - d32ogoqmya1dw8cloudfront

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

Ivanhoe Mines: The New Ultra High-Grade Copper Discovery ,

Feb 04, 2019· Now our immediate exploration focus is to find more of this near-surface, bonanza-grade ore Only for comparison, DD1450 intersected 223 meters grading 1305% copper at a 2% copper cut-off grade...

Metallurgical Development of the El Boleo Copper-Cobalt ,

tonnes of copper ore at a grade in excess of 43% copper during the period 1868 to 1972 Despite the very high grade, such was the complexity of the ore; the Compagnie was unable to produce a concentrate and used direct smelting to treat the or Only ores grading >43% copper were smelted in fuel-oilfired reverberatory furnaces that produced a...

Cut-off grade estimation - QueensMineDesignWiki

Part Three Resources and Technology, Chapter 5 World Copper Resources, , and the copper content (or ore grade) of current mine production The relations be-tween ore grades, tonnages, and production costs , US Government Off Ice, January 1985) COPPER RESOURCES AND RESERVES A general classification for describing the sta-...

Part Four Competitiveness - Princeton University

Part Four Competitiveness , ore than the net tonnage of copper in the ore5 A tonne of lean ore requires no more capital, energy, labor, and supplies to mine than a tonne , change the cut-off grade (the lowest grade that is mined and treated) These are ,...

mining part ii - d32ogoqmya1dw8cloudfront

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

Making the grade: understanding exploration results ,

Mar 24, 2017· Making the grade: understanding exploration results , 1 carat/tonne of ore is viewed as high-grade The geometry is important , of 623% copper at a 30% copper cut-off...

Copper extraction - Wikipedia

Copper extraction refers to the methods used to obtaining copper from its orThe conversion of copper consists of a series of physical and electrochemical process Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors...

The Nature and Use of Copper Reserve and Resource Data

The nature and use of copper reserve and resource data (Geology and resources of copper deposits) (Geological Survey professional paper ; 907-F) , and average grade of ore orig­ , Ore Copper-bearing rock that meets the criteria of...

COBALT - mineralsusgsgov

Mt of ore grading 046% copper and 012% nickel accessible by open pit mining and an additional 300 Mt of higher grade resources, which could be mined by underground methods Cobalt, platinum-group metals, and other precious metals are also present (Cominco Ltd, 2001; Teck Cominco Ltd, 2003, p ,...

‘The next Nifty' - SMEDG

The closest analogue to Nifty is at Mt Isa which contained a number of repeated bodies from the original ‘Black Rock‘ open cut to the current Enterprise ore body over 15 km below (Waring et al, 1998) Only two holes have been continued to depth at Nifty and both have intersected high-grade copper in ,...

Copper - AIMR 2013 - Australian Mines Atlas

Ernest Henry open pit operations had closed by the end of 2011 as mining operations reached the final high-grade ore zone of the open pit , by the end of 2012 and is expected to annually contribute 25 kt copper for a current mine life to around 2019 , Nifty resource was reported in March 2013 as 306 Mt at 25% Cu using a 12% Cu cut-off ...

Learning Goals: -What is an ore deposit? - geoarizonaedu

Learning Goals: -What is an ore deposit? -What is a porphyry copper 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: (amount of copper metal/amount of copper ore rock)*100 2 If a deposit area has 200lbs of copper in 10,000lbs of ore rock ....

2007 MINERAL RESOURCE & ORE RESERVE ,

2007 MINERAL RESOURCE & ORE RESERVE EXPLANTATORY NOTES , Cut-off grade calculations assume metal prices of $600 per ounce of gold and $160 per pound of copper , copper and current long term mining cost assumptions While the resource grade model is unchanged from...