Sulfide copper and nickel mining should never be …

2021-6-10 · The resulting waste dumps, tailings ponds, and abandoned mines from sulfide minerals all would be potential sources of acid mine drainage, heavy metals and other pollutants, contaminating clean water.

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Twin Metals Minnesota (TMM) Mine, Minnesota

2014-11-18 · Twin Metals Minnesota is an underground copper, nickel and platinum group metals (PGMs) mining project planned to be developed in northern Minnesota, US. Twin Metals Minnesota (TMM), a joint venture between Canada-based Duluth Metals (60%) and Chile-based Antofagasta (40%), was formed in January 2010 to develop the project. In November 2014, …

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Cleaning for Mining Ponds | GeoForm …

2022-6-6 · In the mining industry, two types of operations rely on dredges for their mining ponds: Hard rock: From copper to gold, the hard rock mining industry encompasses a range of materials. Each, however, requires a mining process …

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Patterns of plant mortality caused by a copper mine spill

1  · On August 2014, the Buenavista del Cobre mine in northwestern Mexico had a failure in a pond containing a pregnant leach solution that discharged ≈ 40,000 m 3 into the Tinajas creek in the upper Sonora River basin.. We recorded up to 50% mortality of Prosopis velutina distributed along a sector of 7 kilometers of the Tinajas creek, where plants were exposed to the effluent.

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Nickel Ore Mining Process,Processing Nickel …

When floatability difference happens to the various nickel elements in the raw ore, the nickel ore can be recycled from tailings after the copper and nickel did the mixing flotation. Copper- Nickel Ore Flotation Process: A basic principle of …

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Tamarack Mine | Nickel Copper Cobalt | Talon …

2022-6-22 · Talon is a TSX-listed base metals company in a joint venture with Rio Tinto on the high-grade Tamarack Nickel-Copper-Cobalt Project located in central Minnesota. Talon currently owns a 51% interest in the Tamarack Nickel …

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Minnesota''s Copper and Nickel Deposits are …

2018-3-12 · However, many people may not be aware of the fact that Minnesota has some of the largest undeveloped copper and nickel deposits in the world. These massive deposits hold an estimated 4 billion tons of copper, nickel, and …

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Leaching of heavy metals from Dexing copper mine …

2013-10-1 · The leaching behaviors of Zn, Cu, Fe and Mn in mine tailings from Dexing copper mine were investigated by a series of laboratory batch experiments. The effectcs of pH, temperature, particle size and contact time on the leachability of such heavy metals were examined. It was evident that Zn, Cu, Fe and Mn were major heavy metals in the tailings ...

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(PDF) Geochemical and mineralogical characterization of …

2017-6-1 · The Dexing copper mine is the largest open pit copper mines in Asia, with mining and beneficiation history stretching back more than half a century; consequently it has large amounts of …

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Copper Mining Tailings Ponds are not Healthy for Children …

2018-5-10 · Of course, the residents of the towns both in the vicinity and downstream from copper mining tailings ponds naturally want enhanced employment, but every resident of every town that has been destroyed by sudden tailings pond breaches have all come to regret being in favor of allowing uncaring, sociopathic foreign mining corporations to extract ...

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Twin Metals Minnesota (TMM) Mine, Minnesota

2014-11-18 · Twin Metals Minnesota is an underground copper, nickel and platinum group metals (PGMs) mining project planned to be developed in northern Minnesota, US. Twin Metals Minnesota (TMM), a joint venture …

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Twin Metals to Use Dry Stack Tailings at Its Planned …

2019-7-22 · Twin Metals Minnesota (TMM) announced plans to use the environmentally friendly dry stack method to store the leftover rock from its proposed underground copper-nickel mine to be located nine miles southeast of Ely, Minnesota. The dry stack method eliminates the storage pond and dam associated with conventional tailings facilities.

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New lawsuit targets Minnesota''s copper-nickel mining rules

2020-6-25 · By Jimmy Lovrien, Duluth News Tribune. Opponents of copper-nickel mining are urging Minnesota regulators to change the state''s copper-nickel mining rules to ban that type of mining within the same ...

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Galician MP denounces tailings pond breach

2018-2-24 · The tailings pond was part of an old copper/gold mining complex operated by the Mining and Metallurgical Society of Peñarroya and Río Tinto Patiño. According to the MEP, the breach took place on February 15, 2018, and the wastewater ended up in the Brandelos river, located only 100 metres away from the facility.

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Twin Metals changes plan to deal with copper-nickel mine wa…

Responsible mining? Minnesota has a long way to go. | MinnPost

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Environmental leaching behaviour of copper-nickel

1983-6-1 · Hydrornetallurgy, 10 (1983) 329--342 329 Elsevier Science Publishers B.V., Amsterdam -- Printed in The Netherlands ENVIRONMENTAL LEACHING BEHAVIOUR OF COPPER--NICKEL BEARING DULUTH GABBRO AND FLOTATION TAILINGS K.A. NATARAJAN and I. IWASAKI Mineral Resources Research Center, University of Minnesota, …

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Conflicted Over Copper: How the Mining …

2020-6-5 · June 5, 2020. This is the first in a three-part series that will explore the history of Lake Superior and the Boundary waters, the communities affected by two proposed copper mines, the arguments in favor and against the mines, …

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Expanding Tailings Pond at Copper Mountain Mine ''Flirts …

2021-7-25 · The op-ed lays out the tragic environmental damage that has resulted from past tailings pond failures, including the 2014 collapse at the Mount Polley copper mine, when 6.6 billion gallons/25 billion litres of toxic waste flooded into sockeye salmon spawning grounds and fresh water supplies.

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REGIONAL COPPER-NICKEL STUDY PROBLEMS AND …

2012-2-10 · REGIONAL COPPER-NICKEL STUDY ... REVEGETATION OF MINE WASTES Table of Contents Li st of figures List of tables 1. Introduction 1.1 Background 1.2 Purpose 1.3 Approach 2. Tail ings ... 2.6 Assessment of Minnesota Tailings 26 ~.6.1 Heavy Metal Concentration 26 2.6.2 Nutrient Status 27

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Biden admin. cancels leases for copper-nickel mine near …

2022-1-26 · The Biden Administration on Wednesday canceled two minerals leases for the proposed Twin Metals copper-nickel mine in northern Minnesota, likely killing a project widely condemned for being too close to the pristine Boundary Waters Canoe Area Wilderness. The huge underground mine would have tapped major reserves of copper and nickel, minerals key …

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About the Project

Home Meet Twin Metals About the Project. We''re focused on designing, constructing and operating an underground copper, nickel, cobalt and platinum group metals mine, located about nine miles southeast of Ely and 11 miles …

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Responsible mining? Minnesota has a long way to go.

2020-8-21 · The only copper-nickel mine that has reached the permitting stage in Minnesota – the PolyMet/Glencore mine – would fail any reasonable science-based independent certification system. Nonprofit ...

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Both sides claim victory in complicated PolyMet …

2021-4-28 · Updated: 3:51 p.m. Both sides claimed victory Wednesday after the state Supreme Court issued a complex ruling over state permits for the proposed PolyMet copper-nickel mine in northeastern Minnesota.

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Twin Metals to use dry stack tailings at copper-nickel mine

Twin Metals Minnesota is set to use a more environmentally friendly dry stack method for storage of leftover rock from its planned underground copper-nickel mine. The mine will be located nine miles south-east of Ely, Minnesota, US. Twin Metals noted that the dry stack tailings storage method eliminates the use of storage pond and dam ...

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Toxic Copper Mine Tailings Ponds to be Located Upstream …

2016-7-13 · Every copper/nickel liquid tailings pond holds the 99.8% mine waste plus the liquids that is used to pipe the dissolved powder from the processing plant to the pond. Every copper/nickel sulfide mine in the history of mining has leaked/leached poisons into the groundwater, onto adjacent lands and into the downstream environment.

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Should we mine copper and nickel in Minnesota

Sept. 11, 2019. Just as steel made from Minnesota''s iron ore powered the U.S. military to victory during World War II, supporters of copper-nickel mining in the state say the industry could help ...

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Tailings Ponds Up Close

2010-4-1 · Tailings are a mixture of water, clay, sand and residual bitumen that result from oilsands mining. They are stored in large ponds where the clay/water mixture is left to settle. Tailings ponds cover about 130 square kilometres of the oilsands region. Facilitated by CONRAD, Directive 74 has led to more collaboration within the industry, said Fair.

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Copper-Nickel Studies and Non-ferrous Mining

Given all this interest in copper-nickel mining exploration at the time, the EQC adopted a resolution in 1974 requiring an adequate regional study examining environmental, social, and economic impacts of non-ferrous mining before the acceptance of any environmental impact studies. This resolution led to the Minnesota Regional Copper-Nickel ...

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New lawsuit targets Minnesota''s copper-nickel …

2020-6-25 · By Jimmy Lovrien, Duluth News Tribune. Opponents of copper-nickel mining are urging Minnesota regulators to change the state''s copper-nickel mining rules to ban that type of mining within the same ...

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British Colombia''s Mount Polley Copper Mining Disaster of …

2018-2-12 · On August 4, 2014, a copper/gold open pit mine at Mount Polley, British Columbia had its huge tailings pond dam (an earthen dam) suddenly burst, massively polluting downstream streams, rivers and lakes (and probably eventually the Pacific Ocean at the mouth of the Fraser River, not to mention underground aquifers which had already been polluted ...

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Conflicted Over Copper: PolyMet copper-nickel …

2020-6-12 · As for major collapses, Klemz points to what has happened when tailings basins of the type PolyMet has proposed break open and release pollution downstream. Dam collapses like this have happened in Brazil in 2019, killing …

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Lessons From the Most Toxic Open Pit Copper …

 · A typical example of a copper mine mega-flood happened on August 4, 2014 at Mount Polley''s tailings pond in British Columbia. It was called the worst environmental disaster in Canadian history. As far as I was able to …

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5 Compelling Reasons for Copper-Nickel Mining in …

2017-10-6 · The copper-nickel mining industry doesn''t seek to hide in the shadows but rather to provide the public with answers to all these questions and concerns and more within the process of opening a mine. There are five important reasons that the current copper-nickel mining project proposed by PolyMet is a smart choice for Minnesota. 1. Human Safety.

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PolyMet | The Next Generation of Mining in Minnesota

2022-6-15 · Our copper-nickel mine, the NorthMet project, is modern, safe and brimming with opportunity for the state of Minnesota. Located within the established Mesabi Iron Range mining district, the NorthMet project will produce copper, nickel, cobalt and other precious metals we need to drive a sustainable future. Project Overview.

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Minnesota

2017-3-17 · Class Copper, Nickel, and Platinum Group Metal Resources Exploring since 1948 There are many deposits of copper, nickel, and Platinum Group Metal (PGM) resources in the bedrock along approximately 40 miles of the edge of the Duluth Complex near Babbitt, Minnesota. This map shows the locations of the deposits, state metallic mineral

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Utilization of Copper Nickel Sulfide Mine Tailings for CO2 ...

2022-2-2 · Global warming mitigation strategies include reducing CO 2 emissions and encouraging the use of battery-powered electrical vehicles. Nickel in olivine which is an important mineral of many nickel sulfide mines and suitable for permanent CO 2 sequestration is regarded as non-recoverable and discarded in mine tailings as wastes. Enhancing nickel sulfide …

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Copper Mining Tailings Ponds are not Healthy for Children …

2018-5-17 · The first (of many) junior mining company that wants to mine copper in northeast Minnesota''s water-rich, relatively unspoiled forest and lakes region is the PolyMet Mining Corporation that is headquartered in Toronto, Canada. PolyMet is a Canadian Penny Stock mining company that you can buy on the NYSE for 81 cents a share.

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