Gold Mining Cut Off Grade

Dec 04, 2011 In other words, the grade that provides the US$46 is the cut-off grade. Let’s once again assume that the gold price is $1000 per ounce, which is equal to $32 per gram (US$1000/31.1 grams) The formula is simple: total cost/recovery/price per unit of metal = Cut-off grade

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What Does the Grade of a Gold Mine Refer To?

Feb 07, 2020 Explore gold mine grading: how the World Gold Council defines a high-grade gold mine and where the highest graded mines in the world are found. ... Cut-off grade

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

May 16, 2018 In gold deposits this can run into the hundreds or thousands of grams higher than the cut-off grade, leading to a much higher average grade. From the project quoted above, there are some extraordinary intervals of gold mineralization. It should be noted that cut-off grade is not a static concept applied across all types of deposits

Cut-Off Grades For Mineral Resource Reporting: Going The

Cut-Off Grades For Mineral Resource Reporting: Going The Extra Rare Earth Mile This means knowing the costs and practicalities of mining and processing for a particular product. 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)

Cut-Off Grades For Mineral Resource Reporting: Going The

Cut-off grade determination for the maximum value of a

Figure 2—The grade-tonnage curve for a gold deposit (lognormal distribution) with an average grade of 6 g/t gold and a logrithmic variance of 1.2. Thebalancing cut-off grades (H/M = 2.84 g/t) and (K/H = 1.2 g/t)) are indicated

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

Cutoff grade optimization based on maximizing net

Jan 01, 2018 Cut-off grade determination for the maximum value of a small Wits-type gold mining operation Journal of the South African Institute of Mining and Metallurgy , 104 ( 5 ) ( 2004 ) , pp. 277 - 283 View Record in Scopus Google Scholar

Cutoff grade optimization based on maximizing net

Cut-off Grades for Mineral Resource Reporting - Micon

Jul 13, 2016 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 cash costs of production

GoldMining News

Jul 12, 2021 Cut-off grades were established by using an assumed US$1,600/oz gold price and copper price of US$3.25/pound copper; average metallurgical recoveries of 83% for gold and 90% for copper; average mining costs of US$1.60/tonne waste and, US$1.70/tonne ore; and average processing and general and administrative costs of US$6.80/tonne processed

Making the grade: understanding exploration results

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 roughly 30 grams/tonne is high-grade and can be expected to move markets in most cases

Making the grade: understanding exploration results

Reserve & Resources | PureGold

The effective date of the Mineral Resource estimate is February 11, 2019. Mineral Reserves were estimated using a USD $1,275/oz gold price and gold cut-off grade of 4.75g/t for all mining zones with the exception of McVeigh which used a cut-off grade of 4.0g/t

NSGold Corporation Announces Updated Inferred Resource

Sep 16, 2020 The Resource Update considers an underground mining operation and incorporates a 2.0 grams per tonne cut-off grade. Total inferred mineral resources for the Mooseland Gold Property are estimated at 3,454,000 tonnes with an average diluted grade of 4.71 grams per tonne containing 523,000 ounces of gold

Reserves and Resources | Lundin Mining Corporation

The zinc Mineral Resources are estimates within geological volumes based at a nominal NSR cut-off of SEK 350/t (equivalent to 4.5% zinc) and a minimum mining width of 5 m. The copper Mineral Resource is estimated above a cut-off grade of 1.0% Cu

Reserves and Resources | Lundin Mining Corporation

The world’s highest grade gold mines

Jul 16, 2015 With 44.1 g/t of gold in reserves, Fire Creek mine, owned by Klondex Mines and located in Nevada, United States, is believed to be the highest grade underground gold mine in the world. 2

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

ASX listed gold mining company HIGHLIGHTS For

Sep 30, 2020 Wiluna Mining Mineral Resource as the 7th largest JORC compliant gold deposit in Australia. (1) • Using a 1.0 g/t cut-off Wiluna Mining Mineral Resource is 100Mt @ 1.96 g/t for 6.34Moz. • High grade underground mining Mineral Resource at the Wiluna Mining Centre using a 2.5 g/t cut-off is 23.9 Mt @ 4.89 g/t for 3.76 Moz

ASX listed gold mining company HIGHLIGHTS For

Thor Mining record positive drilling results at Alford

2 days ago Mining group Thor Mining reported intercepts significantly above the mineral resource estimate cut-off grade from drilling at the Alford East copper and gold project in Australia. Highlights included encountering 32.9 metres at 0.4% copper and 0.31 grams per tonne of gold from 81.5 metres

First Mining Gold: Springpole Project

The equivalent cut-off grade was 0.34 g/t Au for all pit phases. The mining cost averaged CAD$ 1.94/tonne mined, processing averages CAD$ 14.50/tonne milled, and G&A was CAD$ 1.06/tonne milled. The process recovery for gold averaged 88% and the silver recovery was 93%. The exchange rate assumption applied was CAD$1.30 equal to US$1.00

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