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

    For conducting a mining project's break even analysis, you first need to know about the operational expenses (OPEX).When the OPEX is known, you can calculate the mineral's cut off grade, which is the break even grade, below which it is not economically viable to mine the ore.To find out how I come up with the cost price per tonne (OPEX) if a feasibility study isn't available, I refer you

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  • Ore grades and mining - Google Docs

    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.

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  • 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 units can be used, the cut-off grade is usually expressed as: g/t (grams per tonne) $/t (dollars per tonne) % (percent metal) The

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  • Mining Valuation Lesson: Cut-Off Grade Theory and Practice

    04/12/2011· That means that the higher the cut-off 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 cut-off grade that yields the highest NPV. In our table, that means selecting the 2.5 grams per tonne cut-off grade. Of course, this is an

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  • Cut Off Grade Calculation Optimization

    Table of ContentsTraditional Cutoff Grades in Open Pit MiningHeuristic Cutoff Grade Optimization TechniquesOptimizing The Cutoff Grades By Lane's ApproachAlgorithm for Determining Optimum Cutoff Grades Cutoff grade is defined as the grade that is normally used to discriminate between ore and waste within a given orebody. Although the definition of cutoff grade is very precise, the choice of

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  • Cut-off Grade Optimisation for a Bimetallic Deposit: A

    Ore reserves are important in the determination of a company's share price. High cut-off grade results in fewer reserves, and vice versa. Since mineral reserves are the source of revenue, therefore, the higher the reserves, the higher the revenue. Low cut-off grade may result in the processing of material that does not give high profit at the beginning of the life of mine. This, therefore

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  • Making the grade: understanding exploration results

    24/03/2017· COPPER: Anything over 100 metres and 1% copper equivalent or better is considered to be high-grade. For example, Serengeti Resources announced 119.6 metres of 0.9% copper equivalent (copper

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  • Ore grades and mining - Google Docs

    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.

    Get Price ++
  • Cut Off Grade Calculation Optimization

    Table of ContentsTraditional Cutoff Grades in Open Pit MiningHeuristic Cutoff Grade Optimization TechniquesOptimizing The Cutoff Grades By Lane's ApproachAlgorithm for Determining Optimum Cutoff Grades Cutoff grade is defined as the grade that is normally used to discriminate between ore and waste within a given orebody. Although the definition of cutoff grade is very precise, the choice of

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  • 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: Width

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  • Cut-Off Grades For Mineral Resource Reporting: Going The

    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. To calculate a COG, we can gauge the likely extraction costs and operating efficiencies using

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

    For conducting a mining project's break even analysis, you first need to know about the operational expenses (OPEX).When the OPEX is known, you can calculate the mineral's cut off grade, which is the break even grade, below which it is not economically viable to mine the ore.To find out how I come up with the cost price per tonne (OPEX) if a feasibility study isn't available, I refer you

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  • OreCorp » Home

    12/09/2017· JORC 2012 Classification. Tonnes (Mt) Gold Grade (g/t) Gold Metal (Moz) Measured. 4.63. 4.96. 0.738. Indicated. 16.17. 3.80. 1.977. Sub-Total M & I. 20.80. 4.06. 2.715. Inferred. 2.90. 3.84. 0.358. Total. 23.70. 4.03. 3.072. Reported at a 1.5g/t gold cut-off grade. MRE defined by 3D wireframe interpretation with subcell block modelling. Gold

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  • Copperstone Resources reports increased copper resources

    08/12/2020· The substantial increases are despite the introduction of a 0.8% copper cut-off grade** and at an assumed future copper price of ~ 6,600 USD/ton (as used in the 2016 Scoping Study), conservativism

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  • Mining Valuation Lesson: Cut-Off Grade Theory And Practice

    05/12/2011· 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

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  • Types of Copper Deposits in the World | An Investor's

    The average grade of copper ores in the 21st century is below 0.6 percent copper, with the proportion of ore minerals being less than 2 percent of the total volume of the ore rock.

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  • Cut-off grade estimation - QueensMineDesignWiki

    24/03/2017· The Ivanhoe Mines Kakula deposit in the DRC has returned very high copper grades, including 11.91 metres (true width) of 6.23% copper at a 3.0% copper cut-off. GOLD: One ounce, or

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  • Porphyry Copper & Grade | MarketCap

    At the time "low grade" referred to grades less than 2.5% copper and large was 10's of millions of tons. This was the start of the porphyry era, which continues to this day. Bingham Canyon was the first low grade porphyry copper deposit off the rank. Operations commenced in 1905 on a reserve of about 40 million short tons at the then very

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  • Cut-off Grades for Mineral Resource Reporting - Micon

    13/07/2016· While underground mines may operate with more than one cut-off grade, they typically have a base case or break-even cut-off. In a polymetallic mine, the cut-off may be expressed as an 'equivalent grade' of the primary metal, or by the net smelter return (NSR) value of the mineralized material. That cut-off will be whatever grade is needed to recover enough metal or mineral to pay the

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  • Mining Valuation Lesson: Cut-Off Grade Theory and Practice

    04/12/2011· That means that the higher the cut-off 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 cut-off grade that yields the highest NPV. In our table, that means selecting the 2.5 grams per tonne cut-off grade. Of course, this is an

    Get Price ++

cut off grade copper ore 2012

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