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  • Callinex Discovers Two High Grade Copper Gold Silver

     · Highlights Drill hole PBM-111 intersected 3.09 copper 0.75 g/t gold 13.35 g/t silver 1.88 zinc over 2.96m and a second interval that returned 4.12 copper 0.22 g/t gold 2.21 g/t silver 0.06 zinc over 4.31m Subsequent borehole EM results suggest an abrupt thickening and possible merging of the two base and precious metals rich massive Continue reading "Callinex Discovers Two High

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  • Northparkes Copper and Gold MineAustraliaMining

     · The mine at the Endeavour 26 ore body the largest at Northparkes had pre-mining reserves of around 50 million tons at grade 1.4 copper and 0.4g/t gold. Total proven and probable reserves for copper are approximately 56 million tons at a grade of 1.1 . Mining. Northparkes supports two open pits and a block-cave underground mine.

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  • DISCOVERING WORLD CLASSGOLD AND GOLD-COPPER

     · grade GOLD discovery at Sun Summit s BUCK project and several gold or gold-copper past producers multiple deposits and exploration targets held by mid-sized and major mining companies 3 100 controlled 22 000 ha property near Houston B.C. Developed infrastructure nearbymajor highway power rail Year-round exploration road access

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  • High-grade gold-copper open pit and underground mine

    Access to high-grade underground ore was brought forward by two years. 33 mine productivity rate increase from 1.2 Mtpa to 1.6 Mtpa over a longer underground mine life. Reduced open pit waste mining by nearly 70 million tonnes. Improved project economics including increased cash flows and a longer mine

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  • Underground development at Timok Copper and Gold

    The average grade for copper is 9.23 and 6.23 g/t for gold. The location of the intersection and the grades are consistent with those perceived in the original design. The Timok Copper and Gold project is one of the world s top 10 undeveloped high-grade super-large copper-gold mines. It has an Upper Zone and a Lower Zone.

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  • Global Gold Mines and Deposits Ranking 2012

     · When it came to copper/gold porphyries it was difficult to draw the line as to what was a gold deposit vs. a copper deposit. In this year s report we included deposits such as Reko Diq and Galore Creek because we felt their global contained ounces were too large to disregard even though they are primarily copper deposits. 2012 Result Summary

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  • QMines LimitedQueensland s next copper and gold

     · QMines Limited (ASX QML)(FSE 81V) is seeking to become Australia s first zero carbon copper and gold developer.The Company s flagship project Mount Chalmers is a high-grade historic copper and gold producer. The project has an existing resource three Exploration Targets (JORC 2012) and a large drilling program designed to provide shareholders with leverage to a number of pricing

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  • Break Even AnalysisHow 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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  • Large Low Grade Copper-Gold Deposits How Low Can

    The cut-off grade is around 0.2g/t gold. For the 2011 year Boliden s Aitik mine (within the Arctic Circle in Sweden) milled 31.5 million tonnes at a head grade of 0.24 copper 0.16g/t gold and 2.0g/t silver. At the end of 2011 it had reserves of 710 million tonnes at a grade of 0.25 copper 0.13g/t gold and 1.6g/t silver. Resources totalled

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  • Mining Valuation Lesson Cut-Off Grade Theory and

     · 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 is just under 96 ( 1000/31 X 3 or 1000 per ounce/ 31 grams (troy ounce) X 3 grams of gold) Simply put if it were to cost more than 96 to mine treat and

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  • Chalice hits thick high-grade PGE-copper-gold at Julimar

     · Chalice Gold Mines (ASX CHN) has intersected extensive zones of platinum group element (PGE)-copper-gold mineralisation at the Gonneville Intrusion footwall contact within its Julimar project near Perth. This includes a thick high-grade intersection of 50m at 1.8 grams per tonne (g/t) palladium 0.5g/t platinum 0.9g/t gold and 1.1 per cent copper from a depth of 112m that hosts a higher-grade

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  • GoldDepartment for Energy and Mining

     · The Kanmantoo Mine operated between 1970 and 1976 producing 36 000 t of copper (average grade 0.89 ) and 260 kg of gold (average grade 0.07 g/t) as a by-product. Mineralisation comprised several lenses of chalcopyrite pyrrhotite magnetite and minor gold and silver hosted by Tapanappa Formation garnet–andalusite schist of the Cambrian

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  • Making the grade understanding exploration results

    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 plus gold values added together) at depths from 180 to 300 metres. The stock then increased from 0.30 to 1.50 after those drilling results were reported.

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  • Mining Valuation Lesson Cut-Off Grade Theory and

     · 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 is just under 96 ( 1000/31 X 3 or 1000 per ounce/ 31 grams (troy ounce) X 3 grams of gold) Simply put if it were to cost more than 96 to mine treat and

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  • Cascabel Copper-Gold Project Cascabel region Ecuador

     · The Cascabel copper-gold project is a large high-grade copper-gold porphyry exploration mine located in the Cascabel region of northern Ecuador. The project is being developed by Exploraciones Novomining (ENSA) a joint venture of SolGold (85 ) and Cornerstone Resources (15 ). ENSA holds complete ownership of the Cascabel concession.

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  • Mumbwa Copper Gold MineMining Technology Mining

     · Mumbwa Copper Gold Mine. Located in west central Zambia and lying within known mineralised iron oxide copper-gold (IOCG) terrain the Mumbwa Copp. The Geology of Zambia the Mumbwa project lies within known mineralised iron oxide copper-gold terrain. Mumbwa location map. 1890s historical relief map of the Katanga mines most of the area around

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  • Drilling ResultsHow Can You Determine if a Mining

    For an investor it is very important to know if a drill result is low- medium- or high grade this gives you the first impression of the possible financial outcomes of the deposit.. After analyzing and interpreting various drill reports to distinguish low grade medium grade and high grade mineralization from each other I have summarized my findings in the following table

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  • Mumbwa Copper Gold MineMining Technology Mining

     · Mumbwa Copper Gold Mine. Located in west central Zambia and lying within known mineralised iron oxide copper-gold (IOCG) terrain the Mumbwa Copp. The Geology of Zambia the Mumbwa project lies within known mineralised iron oxide copper-gold terrain. Mumbwa location map. 1890s historical relief map of the Katanga mines most of the area around

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  • Mineral Deposit ValueHow 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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  • Understanding Gold Grades and Other Precious Metals

     · The most commonly used and understood system is the gold grading system. With gold gradings a karat is used to determine the make-up of each piece. With a scale of 0 to 24 gold is rated using a ratio of gold to other metals present. The purest gold will have zero metal additives giving it a

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  • What to Know About Copper Investing (FCX FM.TO)

     · Copper is the unassuming metal that has spent millennia as third fiddle to gold and silver its more prestigious counterparts in Group IB of the periodic table. Copper is such a third-rate metal

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  • Making the grade understanding exploration MINING

     · 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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  • Understanding Cut-Off Grade 4 (Tonnage Grade and

     · The photo below shows an example of this type of deposit in a high grade copper sulphide mine. In this case the ore is worth > 2 000/tonne and the host rock is completely barren.

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  • Tampakan Gold Copper ProjectMining Technology

     · Tampakan mine reserves. The Tampakan mine was estimated to hold 2.94 billion tonnes of resources graded at an average 0.51 copper and 0.19g/t gold representing 15.0 million tonnes (Mt) of copper and 17.6 million ounces (Moz) of gold. The mine was anticipated to produce an average of 375 000tpa of copper and 360 000oz per annum of gold over

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  • 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. Several ounces of gold per tonne is considered to be high-grade for

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  • Porphyry Copper Deposits of the World Database And

     · deposits and some grades such as Pt and Pd when available. Two significant digits are presented for gold silver and molybdenum grades but three significant digits are used for tonnage and copper grades. Age In the field "DepositAge" ages are in standard divisions of geologic time or in millions of years when available (Remane 1998).

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  • When it comes to gold deposits grade is NOT king

     · The grade is king mantra is not always evident in open pit mines says Ulrich — other factors such as strip ratio come into play. Strip ratio refers to the ratio between the amount of waste (dirt or rock) that must be removed to extract one unit of gold-bearing ore. The lower it is the better. 3. Orebody Size Thickness.

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  • Large Low Grade Copper-Gold Deposits How Low Can Grade

    The cut-off grade is around 0.2g/t gold. For the 2011 year Boliden s Aitik mine (within the Arctic Circle in Sweden) milled 31.5 million tonnes at a head grade of 0.24 copper 0.16g/t gold and 2.0g/t silver. At the end of 2011 it had reserves of 710 million tonnes at a grade of 0.25 copper 0.13g/t gold and 1.6g/t silver. Resources totalled

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  • What Does the Grade of a Gold Mine Refer To

     · Using the World Gold Council s g/t standard many of the world s high-grade gold mines are in the United States Russian and Peru. The Fire Creek mine in Battle Mountain Nev. for example was

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  • Mineral Deposit ValueHow 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

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  • The world s top 10 highest-grade copper minesMINING

     · 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

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  • Mining Valuation Lesson Cut-Off Grade Theory and Practice

     · 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 is just under 96 ( 1000/31 X 3 or 1000 per ounce/ 31 grams (troy ounce) X 3 grams of gold) Simply put if it were to cost more than 96 to mine treat and

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  • Large Low Grade Copper-Gold Deposits How Low Can Grade

    The cut-off grade is around 0.2g/t gold. For the 2011 year Boliden s Aitik mine (within the Arctic Circle in Sweden) milled 31.5 million tonnes at a head grade of 0.24 copper 0.16g/t gold and 2.0g/t silver. At the end of 2011 it had reserves of 710 million tonnes at a grade of 0.25 copper 0.13g/t gold

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  • Types of Copper Deposits in the World An Investor s

     · 2. Average grade. Grade is a significant factor in how much a deposit is worth. Most copper ores contain only a small percentage of copper metal bound up within valuable ore minerals.

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  • Copper Mining and Processing Processing Copper Ores

    Copper processing is a complicated process that begins with mining of the ore (less than 1 copper) and ends with sheets of 99.99 pure copper called cathodes which will ultimately be made into products for everyday use.The most common types of ore copper oxide and copper sulfide undergo two different processes hydrometallurgy and pyrometallurgy respectively due to the different

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  • The Mount Morgan gold-copper mine and environment

    The Mount Morgan mine was closed in July 1981 having yielded 237 896 kg of gold (7 648 533 oz) and 360 616 metric tons of copper from 50 million metric tons of ore an average recovered grade of

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