These may be mined copper minerals that are in oxidized form - minerals such as Azurite (2CuCO 3 Cu(OH)3), Brochantite (CuSO 4), Chrysocolla (CuSiO 3 2H 2 O) and Cuprite (Cu2O), residual copper in old mine waste dumps whose sulfide minerals have been oxidized by exposure to the air or sulfididic copper minerals that have been oxidized by ... Jun 05, 2021 Mineralogical characterization of copper sulfide tailings using automated mineral liberation analysis A case study of the Chambishi Copper Mine tailings. Xiao-liang Zhang 1, Jue Kou 1, Chun-bao Sun 1, Rui-yang Zhang 1, Min Su 2 Shuo-fu Li 1 International Journal of Minerals, Metallurgy and Materials volume 28, pages 944955 (2021)Cite this ...
Jun 01, 2021 Core hole MHB-8 targeted the southern end of the zone and intersected sulfide mineralization that is now recognized as a new discovery. Copper and silver in this chalcopyrite-sulfide zone included MHB-8 65 feet (19.8 m) of 0.35% Copper (Cu) and 13.9 g/t Silver (Ag) from 865 to 930 feet (263.7-283.5 m) Copper Equivalent of 0.49% Copper (Cu) Sulfide Mining District planned for Minnesotas Arrowhead Region The First PolyMets NorthMet proposal. PolyMet proposes to mine a sulfide ore body on U.S. Forest Service land south of Ely. This would be the first sulfide ore mine to be permitted in the state of Minnesota. However, additional proposals for sulfide mines will soon follow.
The Bingham Canyon Mine is the largest copper-sulfide mine in the world measuring 2.75 miles across the top and 0.75 miles deep. Acid waters, from the leaching of mine wastes, escaped the collection ... Draft Environmental Baseline Studies 2004 Progress Reports, Chapter 8, Geochemical Characterization Metals Leaching/Acid Rock Drainage ... predominant method used today by the U.S. copper mining industry. However, solution mining of copper oxide and sulfide ores has increased since 1975. In 1991, U.S. mines leached 15.7 million tonnes of copper ore to recover 441,000 metric tonnes of copper. Approximately 75% of
With two copper-nickel sulfide mining projects in progress in northeastern Minnesota, Voyageurs National Park Association stands opposed to proposed sulfide-ore copper mining. This type of mining has unacceptable health and environmental risks in such a water-rich area and poses a serious threat to our waters and to the ecosystems of the Rainy ... Sep 01, 2020 Copper sulfide compound, as a low-toxicity and emerging material, has broad prospects in the field of CO 2 reduction due to its unique structural and electrochemical properties. Much progress has been achieved with copper sulfide nanocrystalline and the field is rapidly developing.
Jun 09, 2021 Discovery of downdip massive sulfide mineralization on 8 Lens 3,580 meters drilled to date in seven diamond drill holes on three sections Results from SES21-032 through SES21-036 included SES21-033 22.25 meters 0.42% Copper, 2.07% Zinc 1.05% Lead 0.58 ppm Gold, and 39.3 ppm Silver in semi-massive to massive sulfide mineralization from 363.00 meters to Feb 02, 2018 The strength of Nornickel is derived from its enormous copper-nickel sulfide mines in the Polar Division, with measured and indicated copper and nickel mineral resources at
Aug 01, 2017 The Duluth Complex in northeastern Minnesota hosts economically significant deposits of copper, nickel, and platinum group elements (PGEs). The primary sulfide mineralogy of these deposits includes the minerals pyrrhotite, chalcopyrite, pentlandite, and cubanite, and weathering experiments show that most sulfide-bearing rock from the Duluth Complex generates moderately acidic leachate The Tongkuangyu copper deposit, North China Craton, is hosted in a volcano-sedimentary sequence (ca. 2.2 Ga) that metamorphosed to the lower amphibolite facies at ca. 1.9 Ga. Petrographic observations revealed various metamorphic fabrics (mineral alignment and foliations) and several generations of biotite, chlorite, and pyrite. Sulfide Pb-Pb dating indicates that copper mineralization ...
Feb 24, 2021 900 meters completed in 7- to 8,000-meter drilling program SES20-031 10.75 meters 0.19% Copper and 0.74% Lead in disseminated and banded, sulfide-bearing silica, hosted in massive sulfide horizon black shales SES21-032 Targets electromagnetic conductor and intercepts distal massive sulfide horizon black shales SES21-033 underway Targeting downdip continuation of the Through its subsidiary, PT-FI, FCX mines one of the worlds largest copper and gold deposits in the Grasberg minerals district in Papua, Indonesia. In addition to copper and gold, PT-FI produces silver. FCX has a 48.76 percent interest in PT-FI and manages its mining operations. PT-FIs results are consolidated in FCXs financial statements.
Jul 22, 2021 Within 1000m of Zone 1, Zone 13 has the potential to add both oxide and sulfide resources to an updated mine plan. The sulfide portion remains open Jun 01, 2021 The Superior deposit has a NI 43-101 resource of 54 million tonnes at 0.41% copper, and the Engels deposit has an unconfirmed historical resource of 19 million tons at 0.63% copper sulfide
May 14, 2021 470 feet/143.2 meters of 0.1% Copper (Cu) and 4.04 g/t Silver (Ag) for a Copper Equivalent of 0.14% Copper (Cu) from 830 to 1300 feet/253.0-396.2 meters Figure 2 To view an enhanced version of ... Jun 09, 2021 Significant copper-lead-zinc mineralization in massive sulfide material begins at 363.0 meters and terminates at 385.25 meters at the lower fault. The
Feb 24, 2021 900 meters completed in 7- to 8,000-meter drilling program - SES20-031 10.75 meters 0.19% Copper and 0.74% Lead in disseminated and banded, sulfide-bearing silica, hosted in massive sulfide ... Mar 01, 2001 Abstract. Chuquicamata, in northern Chile, is the worlds greatest copper orebody. It was controlled, from the initial intrusions (probably at 3633 Ma) through mineralization (last major hydrothermal event at 31 Ma) to postmineral brecciation and offset, by the West fault system. East porphyry, West porphyry, Banco porphyry, and Fine ...