how much is constructing a gold mill plant

small and portable gold wash plant - jxsc machine

JXSCSmall andPortable gold wash plant with trommel, fullyCustomizable & moveable. Equip with the sluice box, gold centrifugal concentrator, shaker table, gold trommel, sand washing machine, vibrating feeders, vibrating screen, pumps, and the like portable mining equipment according to different conditions. CapacityCustomizable 1-300TPH Applicationdry land, beachside, stream, river gold mining, etc. Servicemining process flow design, quick machine selection and quotation, on-site installation, one year warranty.

DescriptionThe portable gold wash plant integrates ore mining and gold mineral processing operation, includes the excavation system, mineral processing equipment, water supply system, tailings treatment system, power supply, etc. TypeThe configuration of the mobile gold wash plant varies with the ore nature, processing capacity, site environment, and other factors. hard rock gold deposit, alluvial gold (placer gold) deposit; dryland placer gold, river gold (need gold dredger), river bed & beachside gold; contains sticky clay, sludge, gold trommel wash plant equipped with trommel scrubber, sand washing machine; Using bulldozer and excavator stockpiles the gold-bearing gravels near the gold mining wash plant, feeds gravels into the wash plant from feeding hopper (mount a vibrating screen to primary classify the gold-bearing gravels), the oversize material slides out, and the undersize material is mixed with water flow through the gold concentrator machines like gold centrifugal concentrator, portable shaker table, portable sluice box, tailings are discharged routinely. Portable gold wash plant manufacturerJXSC has been supplying gold mining equipment for large scale mining and small scale mining plant since 1985, develop deep cooperation relationships with gold mine companies in South Africa, Australia, Ghana, Russia, Congo, etc. Contact us to get the best gold wash plant price.

Portable gold mining equipment and process flow 1. Feeding: dredge pump, hopper feeder with vibrating grizzly bar. 2. Washing and screening: usually use rotary scrubber, gold trommel, sand washing machine, vibrating screen, etc. 3. Beneficiation: gold centrifugal concentrator, shaker table, sluice box, mineral jig. 4. Water supply 5. Tailings 6. Mobile System: Composed of chassis and traction steering two major components, 4 axes 16 tires, 4 mechanical legs support centrifuge, can be turned in situ 180 degrees, easy to move to the workplace. Working principle1. Dry gold mining Dry land mobile gold wash plant with rubble tyre, easy to move on, can separate placer gold from ancient river, dry beach sand. Dryland gold mining usually use trommel screen combines the small gold jig and gold sluice box into a single mobile gold recovery plant to process placer gold, monomer lode gold. This type of small scale gold wash plants has a light weight, easy to maintain, low cost. 2. River gold mining The river gold panning equipment, mostly as the gold dredging ship floating on the water, it is a multifunctional placer mining equipment that combines excavation, ore washing, beneficiation, tailings disposal, and power supply, water supply. River gold dredger can work at stream, river, offshore, beach side, etc. But as for small gold wash plant, the cost of the gold dredger may be a huge part. How to build a small gold wash plant? Using dredge pump pumping the river bed fine sand to the near land portable gold trommel, wash and classify the undersize material to gold centrifugal concentrator and shaker table.

boddington gold mine (bgm), western australia (wa)

The $2.4bn project was initially a three-way joint venture between Newmont Mining, AngloGold Ashanti and Newcrest Mining. In 2006, Newmont bought Newcrests 22.22% share, bringing its interest to 66.67% and ending any Australian ownership.

AngloGold owned the remaining 33.33%. In June 2009, Newmont became the sole owner of the mine by acquiring the 33.3% interest of AngloGold. The original, mainly oxide open-pit mine was closed at the end of 2001.

The project has an attributable capital budget ranging between A$0.8bn and A$0.9bn. On 23 July 2009, the project, including the construction of the treatment plant, was completed. Production began in the third quarter of 2009. The first gold and copper concentrate was produced in August 2009.

Approximately 100,000t of ore was processed by mid-August. Gold production began on 30 September 2009. By 19 November 2009, the mine achieved commercial production. The mine was officially inaugurated in February 2010. The project had an attributable capital budget of between A$0.8bn and A$0.9bn. It employs 900 workers. The attributable life-of-mine gold production is expected to be greater than 5.7Moz.

Newmont and Anglo had focused their exploration activities on the poorly explored areas of the greenstone belt outside the already identified Boddington Expansion resource. The exploration strategy was to identify the resource potential of the remainder of the greenstone belt, with the emphasis on high-grade lode-type deposits.

The environmental authorities approved the life of mine extension project in August 2013. The project has the potential to extend the mine life to 2041. The expansion project includes the development of new RDA, expansion of waste rock dumps (WRDs), the development of new water storage dams and associated infrastructure and associated modification in the existing residue disposal area (RDA), the deepening and widening of pits, and additional stockpiles.

The SGB produced more than 6Moz of gold and is a highly prospective exploration area for further gold mineralisation in both large tonnage stock-work gold resources and high-grade lode-type gold resources.

Built on the footprint of the original BGM, the operation involves open-cut mining from two large pits and is expected to produce an average 850,000oz of gold and 30,000t of copper a year for more than 20 years.

Average attributable gold production in the first five years will be 1Moz a year, while on an average life-of-mine basis, attributable production is estimated to be between 250,000oz and 270,000oz a year.

Copper production, which is sold as concentrate, is expected to be 30,000tpa. In 2009, approximately 103,300oz of gold and 9Mlb of copper were sold from the Boddington mine. The mine produced 709,000oz of gold and 77Mlb of copper in 2018.

Ore containing copper and gold is crushed to a coarse size before the ore is sent to the treatment plant via a conveyor. At the treatment plant, the ore is crushed further and ground finely to slurry. The ore is initially processed by flotation, which produces copper / gold concentrate with 18% copper.

Fine liberated gold is recovered by processing flotation concentrates through a gravity circuit before it is dewatered and stored. It is then ship-loaded for delivery to the smelters. The residual gold content found in the flotation tailings is recovered through a carbon-in-leach circuit.

Design, construction and commissioning of electrical and instrumentation services for the wastewater treatment plant at the mine were provided by Hueppauff Electrical. The equipment for the plant was provided by Weir Services Australia.

gold ore rock crusher impact flail processing quartz crushing mill -

These portable impact mill rock crushers that we produce are high quality, made in the USA impact mills that crush rocks and realease gold bearing ore. These

are made of the highest quality, super thick, high carbon, industrial steel materials for years of trouble free use. We then use an industrial quality high

temperature powder coating to protect the mill from corrosion and to keep its beauty for many seasons to come. We also show you how to crush, grind

and process your gold ore bearing quartz material and offer information on gold recovery with these units. (800) 688-4080

NEW Gold Stryker GS-4000 HV (High Volume) is a high output / dual adjustable discharge / heavy duty version flail impact rock crusher gold mill that is very portable and perfect for the small gold mining operation. The Gold Stryker GS-4000HV uses a 13 HP Honda Industrial engine for many years of trouble free use. It can process and crush up to 3-3.5 tons of material in a day, all the way down to #300 mesh through the mill to release the gold. $6499 Sale

(The quantity of material the GS can process depends on the size, density and hardness of the rock being fed into the hopper. The smaller the rock, the more material you can run in a day.)

The New Gold Stryker GS-5000HD is a large flail impact rock crusher gold mill that is very portable and perfect for the small gold mining operation The Gold Stryker GS-5000HD uses a HP Honda Industrial engine for many years of trouble free use. It can process and crush up to 5+ tons of material in a day, all the way down to #300 mesh through the mill to release the gold. $7899 Sale

(The quantity of material the GS can process depends on the size, density and hardness of the rock being fed into the hopper. The smaller the rock, the more material you can run in a day.)

Gold Stryker GS-7000-LD is a very large flail impact rock crusher gold mill that is very portable and perfect for the small gold mining operation. The Gold Stryker GS-7000-LDuses a large 25 HP Honda Industrial engine for many years of trouble free use. It can process and crush up to 7 tons in a day, all the way down to #300 mesh through the mill to release the gold. $15999 Sale

(The quantity of material the GS can process depends on the size, density and hardness of the rock being fed into the hopper. The smaller the rock, the more material you can run in a day.)

Our Gold Stryker impact rock crusher mill is a very portable unit and a serious work horse. Not a small toy for testing a few rocks. They will also process the gold

daily. Many of our customers are located in South America, Canada, Africa, Alaska, The Bahamas and other far away places. If you can see this web page, then we can ship to you!

the 17 best vegan protein powders | eat this, not that!

Whether you're vegan or mostly plant-based, a common misconception is that it can be challenging to get enough protein in your diet. Enter: vegan protein powders. Made with brown rice, quinoa, hemp, pea protein, soy, or a blend of plant proteins, the latest vegan powders supply anywhere from 14 to 22 grams of the muscle-building macronutrient per scoop. And if you choose a vegan protein powder blend, they're more likely to have a more complete amino acid profile.

To compare, the average animal-based protein powder contains 20 to 25 grams of protein per scoop. Even if you're not vegan, you should still consider making whey for plant protein powders in your diet. Plant-based protein powders are packed with fiber, which takes longer for your body to digest so you stay fuller for a longer period of time. And unlike powders made with casein, whey, and eggs, vegan protein powders might be easier to digest for some people. Moreover, a scoop of the plant-based stuff delivers essential nutrients, like magnesium, iron, calcium, and potassium.

To help you pick out the best tub on the shelf, we rounded up the best vegan protein powder brands you can find at the grocery or nearest health foods shop. A good bet is to find one that's organic because you know it's also non-GMO.

Frances Largeman-Roth, RDN, nutrition expert and author of Eating in Color, says, "Since we're talking about plant protein, you don't need to worry about synthetic hormones, but you do still want to know that the ingredient (soy, hemp, rice, etc.) wasn't grown with a bunch of chemical pesticides and fertilizers either."

Largeman-Roth also says that some protein powders have a laundry list of ingredients, so go with one that has ingredients you know and understand. "If you're OK with artificial sweeteners or Stevia or monk fruit, that's fine, but lots of folks want to avoid those. In that case, look for one with less than 10 grams of added sugar per serving," Largeman-Roth explains.

While the protein count is much lower for hemp seeds than other plant-based sources, they contain 20 amino acids, including all nine of the essential ones. They're also an excellent source of fiber and heart-loving omega-3 fatty acids. At 14 grams of protein and eight grams of fiber per scoop, Bob's Red Mill's powder has a mild flavor that you can easily blend into post-workout smoothies, energy balls, and baked goods.

Certified USDA Organic, non-GMO, and soy-free, Aloha is one of the cleanest vegan protein powders out there. Thanks to the powerful blend of pea protein, hemp seed, and pumpkin seed, you'll get 18 grams of the muscle building blocks along with six grams of fiber and a generous dose of magnesium and iron. Aloha sweetens its powder with coconut sugar and monk fruit extract as well as adds pink sea salt, vanilla bean, and Madagascar cinnamon for a bold vanilla flavor that goes great with overnight oats and pancakes.

Optimum Nutrition's plant-based protein powder has one of the highest amounts of protein and provides all nine essential amino acids per serving. It also has four grams of naturally occurring BCAAs, which are branched-chain amino acids that help reduce muscle breakdown post-workout. In addition, each two-scoop serving offers vitamin B12, a generous dose of fiber-rich ancient grains, and beet powder for recovery.

If you're on a quest for efficiency, look no further than Amazing Grass' protein powder, which combines greens, like spinach, spirulina, broccoli, and wheatgrass with pea protein, hemp protein, chia, and quinoa. It has a fruit blend of acai, banana, goji, sweet potato, pineapple, and raspberry, too. Bake with this protein powder to sneak some greens into your breakfast muffins.

In addition to its excellent protein profile, Ora's superfood protein powder also delivers a variety of anti-inflammatory foods, including blackberries, blueberries, broccoli, kale, and turmeric. It also packs in some prebiotic benefits with Jerusalem artichoke. And with flavors like vanilla, chocolate, and vanilla chai, how could you resist?

With a complete amino acid profile, you can't go wrong with Vitamin Shoppe's Plnt protein powder, which comes in vanilla and chocolate. Free of GMOs, soy, nuts, and artificial preservatives, colors, flavors, or sweeteners, a scoop serves up 5 grams of iron, 40 grams of potassium, and 40 grams of calcium.

Three words: All. In. One. This protein powder gives you 20 grams of plant-based protein plus 50 percent of your daily value of eight different vitamins and minerals. Not to mention, it also packs gut-boosting probiotics and omega-3 fatty acids. Go for the plain, unsweetened variety if you want something simple or satisfy your sweet cravings with chocolate mint, chocolate, French vanilla, coconut almond, mocha, and berry.

Protein source: Pea protein, sprouted brown rice protein, amaranth sprout, buckwheat sprout, millet sprout, buckwheat sprout, garbanzo bean sprout, quinoa sprout, chia seed sprout, lentil sprout, adzuki bean sprout, lentil sprout, flax seed sprout, sunflower seed sprout, pumpkin seed sprout, sesame seed sproutProtein payoff: 22 g per serving

Made with 13 sprouted proteins and a complete profile of all the essential amino acids, Garden of Life's raw organic powder will help you meet all of your "get swole" needs. It also contains probiotics to support your digestive health and vitamins A, D, E, and K. From vanilla to chocolate cacao to vanilla spiced chai, these flavors will make your smoothies sing.

Espira by Avon's newly launched non-GMO plant protein powders for women are designed with 4,500 milligrams of BCAAs to help your muscles recover post-workout. It's also infused with an enzyme blend that includes bromelain, which helps with reducing swelling and muscle soreness from exercise.

Following the keto diet and want to keep your carb intake to a minimum? A scoop of NOW Foods organic plant protein powder has just three grams of carbs (and only one gram of net carbs) and zero sugar. Blend some into an avocado smoothie to ensure you're getting ample amounts of healthy fat to maintain ketosis.

Protein source: Fermented pea protein isolate, brown rice protein, hemp seed protein concentrate, quinoa sprouts, alfalfa herb top protein, spirulina, and mung bean sproutsProtein payoff: 15 g per serving

While some protein powders can cause bloating and digestive issues, the high-quality blend of fermented plant proteins in this powder makes it easy to break down and absorb the nutrients. The best part is it also has all nine essential amino acids that help repair and build muscles. Add a scoop of the vanilla, chocolate, or unflavored powders to delicious breakfast pops for a frozen a.m. treat!

The powerhouse protein blend of pea, brown rice, quinoa, chia seed, and amaranth in this powder will keep you energized to take on your day long after your a.m. sweat session. What's more, it has a complete amino acid profile, BCAAs, and MCTs to help your body recover after some muscle-burning HIIT. And if you're swearing off sugar, you're in luck because you won't find any of the blood sugar-spiking white stuff.

From hemp toppers to bites to protein powder, Manitoba Harvest has got us high on hempand we don't mean the psychedelic kind. With two grams of omega-3 and 6 and three grams of fiber per serving, this Hemp Yeah! powder will restore your energy post-run and make you feel more satisfied after sipping on a green smoothie. It blends well with any dish you add it to and is also certified organic, non-GMO, and kosher-friendly. That's pretty hemptastic!

Your zucchini bread, smoothies, oatmeal, and pancakes will instantly get a nutrition upgrade with the addition of this hemp protein powder. In addition to serving up 15 grams of hunger-curbing protein, it also boasts 8 grams of waist-whittling fiber as well as omega-3s, iron, magnesium, and zinc.

Unlike other protein powders on this list, Moon Juice provides a powerful dose of adaptogens, which are medicinal herbs and mushrooms that help your body manage stress and boost immunity. Cordyceps mushrooms, reishi, and ashwagandha can help improve cognitive function and fight off inflammation from high cortisol levels. Prepare a refreshing latte with a scoop of the powder to give you the mental stamina to take on your day.

You don't get one but two scoops of this flavor-packed protein powder in one serving. Kick-start your day by adding a double of the crave-worthy chocolate to your morning smoothie. You'll also get six grams of fiber and a wealth of other essential vitamins and nutrients, such as vitamins A, C, D, and K, and manganese, selenium, and zinc.

Known for selecting high-quality ingredients, PlantFusion emphasizes purity in their products so you know you're getting the best that's out there. For example, their vanilla protein powder comes from vanilla beans in Madagascar and their yellow peas were harvested from the hills of northern France. Moreover, lucuma fruit from Peru, monk fruit, and yacon root have been added for atouch of sweetness while avoiding the sugar crash that comes with cane sugar.

mine & mill equipment cost guide - costmine

Estimators, engineers, mine planners, appraisers and purchasing agents have relied on the Mine & Mill Equipment Cost Guide for over 20 years. Gathered directly from the source, with manufacturers, dealers and mining companies providing the most current information available.

Our Equipment Cost Guide is the most reliable source of equipment costs available to the mining industry. Estimators now have access to a convenient source of hourly operating costs as well as capital costs for virtually every piece of equipment listed in our previous guides.

Included are capital and operating costs for over 3,000 equipment items most commonly found at mines and mills around the world from 2 HP pumps to 2,000 HP trucks, from $200 slusher buckets to $30,000,000 walking draglines.

Calculate capital and hourly operating costs for virtually every equipment item needed for your project in a matter of minutes. Never guess at costs or waste time trying to locate a manufacturer to give you prices. The Mine & Mill Equipment Cost Guide has tabulated all the cost data you need in a convenient look-up format. Our capital costs are actual list prices or reliable estimations, and our operating costs are solid engineering estimates.

The Mine & Mill Equipment Cost Guide covers more than 3,000 items of mobile, portable, and stationary equipment commonly required by mining and milling operations. Select from a full range of sizes and types, with productivity information for many items.

Our equipment cost data also comes in a convenient online format. The Equipment Cost Calculator allows you to build your equipment fleet, tabulate its costs, adjust for local economics and conditions, and export the data into your own spreadsheet for further analysis.

gold processing,extraction,smelting plant design, equipment for sale | prominer (shanghai) mining technology co.,ltd

Prominer maintains a team of senior gold processing engineers with expertise and global experience. These gold professionals are specifically in gold processing through various beneficiation technologies, for gold ore of different characteristics, such as flotation, cyanide leaching, gravity separation, etc., to achieve the processing plant of optimal and cost-efficient process designs.

Based on abundant experiences on gold mining project, Prominer helps clients to get higher yield & recovery rate with lower running cost and pays more attention on environmental protection. Prominer supplies customized solution for different types of gold ore. General processing technologies for gold ore are summarized as below:

For alluvial gold, also called sand gold, gravel gold, placer gold or river gold, gravity separation is suitable. This type of gold contains mainly free gold blended with the sand. Under this circumstance, the technology is to wash away the mud and sieve out the big size stone first with the trommel screen, and then using centrifugal concentrator, shaking table as well as gold carpet to separate the free gold from the stone sands.

CIL is mainly for processing the oxide type gold ore if the recovery rate is not high or much gold is still left by using otation and/ or gravity circuits. Slurry, containing uncovered gold from primary circuits, is pumped directly to the thickener to adjust the slurry density. Then it is pumped to leaching plant and dissolved in aerated sodium cyanide solution. The solubilized gold is simultaneously adsorbed directly into coarse granules of activated carbon, and it is called Carbon-In-Leaching process (CIL).

Heap leaching is always the first choice to process low grade ore easy to leaching. Based on the leaching test, the gold ore will be crushed to the determined particle size and then sent to the dump area. If the content of clay and solid is high, to improve the leaching efficiency, the agglomeration shall be considered. By using the cement, lime and cyanide solution, the small particles would be stuck to big lumps. It makes the cyanide solution much easier penetrating and heap more stable. After sufficient leaching, the pregnant solution will be pumped to the carbon adsorption column for catching the free gold. The barren liquid will be pumped to the cyanide solution pond for recycle usage.

The loaded carbon is treated at high temperature to elute the adsorbed gold into the solution once again. The gold-rich eluate is fed into an electrowinning circuit where gold and other metals are plated onto cathodes of steel wool. The loaded steel wool is pretreated by calcination before mixing with uxes and melting. Finally, the melt is poured into a cascade of molds where gold is separated from the slag to gold bullion.

Prominer has been devoted to mineral processing industry for decades and specializes in mineral upgrading and deep processing. With expertise in the fields of mineral project development, mining, test study, engineering, technological processing.

major mines & projects | ahafo mine

The Ahafo mine is composed of three orogenic gold deposits that have oxide and primary mineralization. The gold is hosted in brittle shear zones cutting granitic intrusives that have kilometer-scale vertical and lateral extent. Gold occurs primarily in pyrite and secondarily as native gold in quartz veins.Regionally, there are 12 known deposits in the Ahafo district, localized along multiple northeaststriking structural zones. Discrete mineralization styles are recognized within the Ahafo district, which are termed Kenyasi-style, Subika-style, and Subenso-style. The Kenyasistyle and Subika-style mineralization are identified within the Ahafo South Operations area and Subenso-style mineralization is identified within the Ahafo North area.The Kenyase style is hosted in structures on or parallel to the regional Belt boundary separating basinal metasediments from Dixcove type granodiorite. High-grade zones occur in hydrothermal breccia and quartz veins accompanied by intense silica-albite-carbonate-sericite-pyrite alteration. Teekyere type deposits occur solely within folded metasediments intensely altered by carbonate, quartz, feldspar, pyrite, chlorite and sericite. They lack veins, instead occurring in pervasive alteration. Yamfo style deposits are similar to Teekyere type but occur in discrete veins. Newmont geologists Enders (2004) and Williams (2005) lump the Teekyere and Yamfo deposits together calling them Subenso type. Grades within the deposits are consistent, with the gold occurring with very fine disseminated pyrite. Arsenopyrite is absent; the ore is non-refractory above and below oxidation, which generally occurs to a depth of 50-75 metres (Griffis, 2004).All of the shear zone deposit types appear to be part of the same mineralized system. As with many deposits located in tropical climates, a saprolite zone, typically between 550 m thick, is developed at surface. The saprolite zone gives way at depth to a sulfide zone, within which gold occurs in structurally-controlled zones of hydrothermal alteration.Ahafo South Operations area.The Apensu deposit is located on the main Kenyasi Thrust Fault zone at the southern edge of the Ahafo trend. It is considered to be a Kenyasi-style deposit. When open pit mining commenced, the deposit had dimensions of 3.8 km x 600 m and had been tested to 500 m vertical depth.Mineralization was developed in mylonitic to cataclasite units along the sheared contact between footwall Birimian volcanosedimentary units and hanging wall granodiorite. Footwall units included phyllonite (PHY), meta-volcanosedimentary units (MV) and mixed mylonitic volcano sedimentary units (GVM). Late-stage fine-grained aplite dikes that are sub-parallel to the Kenyasi Thrust Fault were logged but could represent fine-grained mylonite zones.Mineralization is characterized by an association of silicaalbitecarbonatewhite micapyrite alteration, quartz veining and brittle chlorite-filled fractures. Better gold mineralization is developed in quartzcalcite veins associated with pyrite grains that can vary from fine disseminations to 1.5 mm in size. Gold occurs as single grains 120 m in diameter but also commonly occurs in clusters of grains from 510 m. There does not appear to be an association of gold with either arsenopyrite or rutile, and the gold is generally silver-poor, with <5 ppm Ag.Visible gold occurs in the veined cataclasite. Locally, 0.22.0 cm wide quartz veins can return assays with more than 32 g/t Au from coarse gold. In the oxide zone, gold is associated with coarse goethite pseudomorphs after euhedral pyrite. Gold grains in the oxidized zone range from 510 m. Manganese oxides are also observed in oxide mineralization.Apensu DeepsApensu Deeps has dimensions of 3.9 km x 600 m and is tested to about 800 m vertical depth. The Apensu Deeps area is subdivided into four zones, Apensu South, Apensu Gap, Apensu Main, and Apensu North. Mineralization remains open at depth in all zones, and to the north in Apensu North.Shear zone fabrics and fault geometries were inherited from early compressional deformation and include a strong cataclastic deformation of the hanging wall granitoids interpreted to be analogous to a crush breccia. The Apensu Gap area is different to the Apensu South and Apensu Main zones, as the area lacks the mafic unit that is associated with Apensu South, and the cataclasis is very weak. In this area, it appears that low-angle faults control and limit the extent of better grade gold mineralization. Subika The Subika deposit is located about 2 km southeast of the Apensu Main deposit. It is developed in the hanging wall of the Kenyasi Thrust Fault but lies on a separate and parallel fracture zone (MFZ) to the fracture that hosts the Kenyasi-style deposits. The Subika deposit has horizontal dimensions of approximately 2.2 km x 400 m, and is tested to about 1 km in vertical depth. Subika mineralization remains open at depth and along strike. There is little development of either duricrust or saprolite, due to erosion associated with the old Tanoso River. Oxidation is limited to a thin (515 m) zone of complete oxidation of bedrock, followed by an irregular zone of partial oxidation extending as much as 20 m into primary bedrock.Better grades of gold mineralization occur in dilatant zones (MFZ), ranging in width from 160 m. Hanging wall lower-grade mineralization tends to extend only about 30 m from the dilatant zones. Higher grade shoots within the dilatant zones plunge south at 20 to 70. The high-grade zones appear to be controlled by dilatant left jogs in the MFZ created by offsets across the mylonite zones. Four granitoid subset lithologies are recognized: diorite, gabbro, microdiorite, and dioritegabbro mixed. Aplite and pegmatite dikes cross-cut the granitoid material.Mineralization is hosted in the MFZ, which typically contains >25 g/t Au over widths of 550 m. Quartz and carbonate veinlets are common with thickness between 150 mm. They form stockworks in some instances and most of the veins are impregnated with pyrite, and in some cases with sparse visible gold at the contact with the host rock.Awonsu The Awonsu deposit is located approximately 1 km to the northeast of the Apensu deposit in a right-hand jog of the Kenyasi Thrust Fault and is a continuation of the Apensu mineralizing system. The Awonsu deposit had horizontal dimensions of approximately 1,800 m x 150 m, and was tested to 450 m vertical depth. The mineralization remains open at depth and towards the north along strike.The primary lithological units in the Awonsu deposit were altered to a depth of 40 m to saprolite, intensely oxidized, leached, and mottled and contain saprolite clay and quartz fragments.Awonsu mineralization was typically more disseminated than that at Apensu. AmomaThe deposit has horizontal dimensions of 1,500 m x 170 m, and is tested to approximately 300 m vertical depth. Mineralization remains open at depth.Footwall rocks comprise a mixture of mafic volcanic units, and pelitic to turbiditic sedimentary units of the Birimian succession. Granitoids of dioritic to tonalitic composition comprise the hanging wall. Overlying the deposit is a layer of duricrust, which can be 8 m thick, comprising iron pisolites and transported alluvial cobbles. Saprolite is from 2050 m thick.Gold mineralization is developed primarily in the cataclasite unit. Mineralized zones that host gold grades >0.5 g/t Au range in width from 10110 m. Higher-grade material (>1.5 g/t Au) is developed in the cataclasite, but lower-grade (0.51.5 g/t Au) mineralization locally occurs as a 2050 m wide halo in the hanging wall granitoids. A narrower, lower-grade halo also occurs in the footwall mixed mylonite units, ranging from 030 m in width.

Ahafo has two active open pits, Subika and Awonsu. Subika added an underground operation, which reached commercial production in November 2018, and Awonsu completed a layback in November 2019. Open pit mining is conducted at Ahafo South using conventional techniques and an Owneroperated conventional truck and shovel fleet.Underground mining is currently conducted using conventional stoping methods, and conventional mechanized equipment. Underground mining is conducted by contractor African Underground Mining Services (AUMS). The Subika underground mining operations are split into two areas: The Upper mining zone, above the 840 relative level (RL); also known as the upper Yoda area; The Central mining zone (corridor) below the 840 RL; also referred to as the Central area.The mine plan assumes the use of a number of different mining methods, including: Sub-level open stope (SLOS): to be used above 840 RL; Long-hole open stope retreat (LHOSR): to be used above the 750 RL in the Central zone; Long-hole retreat with rockfill (LHSRF): to be used in the transition zone between the 750 and 665 RLs in the Central zone; Single lens retreat (SLR): to be used below the 665 RL in the Central zone, and in the North and South mining zones; stopes will be paste-filled.Mining operations in the Sub level open stope (SLOS) zone will use existing infrastructure and spirals created on a 40 m level spacing to access the stopes. These stopes are mined from the lowest stope level upward in stope groups to create large open stopes. The ore on these levels is loaded directly from the mining extraction level to trucks and hauled up the existing main decline to the surface, and placed on stockpiles. Surface haulage equipment transports stockpiled material to the process plant.To access the lower ore, below the 840 RL, a set of twin declines will be developed off the existing main haulage decline. The twin declines will be developed as a figure eight or elongated spiral configuration with one full rotation at 50 m intervals. The declines will be connected via a link drive that will act as a ventilation, escapeway and haulage connection between the two declines.Both declines will act as a primary ventilation circuit with fresh air. Additional ventilation will be sourced through fresh air ventilation raises connected at the link drives and the foot wall drives below the 750 RL. The fresh air raise will deliver refrigerated air from the surface refrigeration system. The return air will be taken from the access drives above the 750 RL and from the ends of the foot wall drives below the 750 RL, using return air raises connected to the main fans at the surface and Portal 2.Level accesses will be created off the decline at 25 m intervals to cross the ore zone from levels 800 to 700 RL. Below the 700 RL, the level interval will be increased to 35m.Above the 750 RL, infrastructure such as substations, pump cuddies and sumps will be developed on these access drives. On these levels the ore drives will be developed from the access drives along the ore lenses identified as containing the mineralization for eventual stoping. The ore drives will be driven to the extents of the defined mining corridor and stoping will retreat from the end of the orebody towards the accesses. These stopes will be mined top-down. Stopes will be mined from the end of the ore drives back to the level access. Pillars will be left between stopes along the mine level for regional stability. Stopes will be mucked using remote mucking equipment back to an ore pass created between levels. Trucks will be loaded from the level below the mining extraction level via the material placed in the ore pass. The trucks will travel up the spiral declines to the main haulage decline and exit and enter via the North portal.Below the 725 RL, the access drive from the decline will connect to a footwall drive that will be offset from the ore zone by 30 m. Stope access drives will be driven off the footwall drives to develop the stopes in the mineralized zone. The footwall drive will be used for infrastructure to connect ventilation returns, ore passes, substations, sumps and other infrastructure to support the mining on the levels. The mining direction for stopes in the areas below the 750 RL is centerout. Thus, stopes will be mined from a specified centralized location out to the extents of the orebody. These stopes will be mined bottom-up.For stopes between the 750 and 665 RL, pillars will be left between stopes along the mine level for regional stability. Stopes will be mucked using conventional and remote mucking equipment back to the foot wall drive. Trucks will be loaded from the level below the mining extraction level via the material placed in the ore pass. When stope mining is completed, the stopes will be backfilled with rockfill using truck tips and remote loading. Stopes must be backfilled before adjacent stopes can be mined in the sequence.For stopes below the 665 RL, no pillars will be left between stopes along the mine level for regional stability. Stability will be provided by backfilling the stopes with paste fill after the stopes have been mined. Stopes must be mined in sequence from a center-out, bottom-up approach with the mine sequencing a critical factor in controlling the high stress potential of these stopes. Stopes will be mucked using conventional and remote mucking equipment back to the footwall drive.Trucks will be loaded from the level below the mining extraction level via the material placed in the ore pass. When stope mining is completed, the stopes will be backfilled with paste fill from a surface plant facility. Paste fill will be directed to the stopes through fill pipes from the surface to underground. Once a stope is filled and the backfill cured for the time required, the adjacent stope can be mined.The daily production rate is approximately 95,000. tonnes.The primary source of ore for 2019 will be from stockpiles and Subika, which will produce significant tonnes of high-grade ore. Three 9400 diggers will be located in Subika from May 2019 to the last quarter of 2019, when mining is planned to start in Awonsu Phase 3. Subika mining will constitute stripping of large quantities of waste from pit Phase 4. Mining will be completed in Subika by 2024, while Awonsu Phase 4 will be the last pit to be completed in 2029.

The Ahafo Mill Expansion was completed in October 2019 that expanded the existing plant by approximately 3.5 million tonnes per year through the installation of a new crusher, a single stage SAG mill and two leach tanks. Crushing Circuit ROM ore is dumped from haul trucks or a front-end loader into a feed hopper which feeds a 54- inch x 75-inch gyratory crusher. Primary crushed material is discharged into a surge hopper directly underneath the crusher. From the surge hopper, the primary crushed material is withdrawn to a reclaim stockpile via an apron feeder, conveyors and a transfer station. Where oxide ore is available, the oxide ore is loaded onto the tail end of the SAG mill feed conveyer. Primary ore from the reclaim stockpile is discharged to the SAG mill feed conveyor through apron feeders. A regulated amount of lime from a lime silo is also added to the SAG mill feed conveyor.Grinding Circuit The grinding circuit consists of a single 10.36 m diameter () x 5.00 m effective grinding length (EGL) SAG mill followed by a ball mill in closed circuit with hydrocyclones. The SAG mill and two MP800 pebble crushers are in a closed circuit. The SAG mill discharge is classified via a pebble dewatering screen. The oversize from the screen is crushed via the pebble crushing circuit and returned to the SAG mill.The undersize from the pebble dewatering screen reports to the cyclone feed hopper and is pumped to a cluster of classification cyclones. The cyclone underflow reports to the ball mill for regrinding. The cyclone overflow reports to the pre-leach thickener via the trash screens.

The processing plant was commissioned in 2006 to process 7.5 million tonnes of primary and oxide ore per year. With the depletion of oxide ore, the current plant throughput has decreased to 6.5 million tonnes per year. The processing plant consists of a crushing plant, a grinding circuit, carbon in leach tanks, elution circuit, counter current decantation circuit and a tailings disposal facility.The Ahafo Mill Expansion which was completed in October 2019, expanded the plant capacity to process approximately 11 million tonnes per year through the installation of a new crusher, a single stage SAG mill and two leach tanks. Wet Circuit The undersize of the trash screens reports to the 42 m pre-leach thickener with the thickener overflow recycled to the milling circuit as process water. The pre-leach thickener underflow is pumped to CIL leach and adsorption tanks in series. Carbon is added to the CIL tanks and flow countercurrent to the process slurry. The CIL tailings is discharge onto the carbon safety screens before being pumped to the countercurrent decantation (CCD) circuit.The CCD circuit consist of two 42 m thickeners. The overflow from the thickeners is recycled back to the process as process water while the underflow is pumped to the tailings disposal tank. Tailings are discharged via a spigot system into the TSF.Stripping and Dore Production The loaded carbon is recovered via a carbon recovery screen and treated in the elution and electrowinning circuit. Loaded carbon is acid washed with dilute hydrochloric acid in an 18 t acid wash column prior to transfer into an elution column where it is presoaked in a cyanide/caustic solution for 30 minutes to elute gold. The pregnant eluate is then rinsed from the carbon by as many as 10 bed volumes of water heated to 130 C. The resultant pregnant solution is pumped to electrowinning cells in which the gold is deposited on cathodes. The gold sludge on the cathodes is washed, dried and smelted in a furnace to produce dor. Dor is shipped to Switzerland to be refined to bullion at Valcambi.A CCD circuit was commissioned in 2008 to recover cyanide from CIL tailings prior to discharge to the TSF. Recovered cyanide is effectively re-used in the CIL circuit and weakly acid-dissociable cyanide (CNWAD) levels in the plant tailings are effectively controlled to ensure the discharge limit of 50 ppm CNWAD is not exceeded.A gravity circuit that was initially included in the plant was decommissioned in 2010.

Reserves at December 31, 2020: Ahafo South Open Pits: Cut-off grade utilized in 2020 reserves not less than 0.67 gram per tonne. Ahafo South Underground: Cut-off grade utilized in 2020 reserves not less than 3.10 gram per tonne.Ahafo North: Cut-off grade utilized in 2020 reserves not less than 0.50 gram pertonne.

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