Latest Economic geology Stories
PORT ST. LUCIE, Fla., June 6, 2013 /PRNewswire/ -- Ghana Gold Corp. (OTC Markets: GGCO) announced today the appointment of Mr. Chris Ellom as Head of Operations in Ghana. Mr. Ellom is a native of Ghana and a Canadian Citizen. Chris Ellom was educated in England and in Canada with a background as an Engineering Technologist. In 2010, Chris returned to his birth place and founded the Smile Africa initiative focused on providing books and computers to children, with the purpose of...
CALGARY, June 5, 2013 /CNW/ - TVI Pacific Inc. (TSX: TVI) (OTCQX: TVIPF) ("TVI" or the "Company") announced today, that as a result of positive bench-scale test work carried out at the Agata Nickel Processing Project, it has commissioned and commenced operation of pilot-plant testing which will further define the technological parameters to be used in producing a Bankable Feasibility Study with the goal of building a commercial processing plant. The positive test work on nickel...
Gold Recoveries Average 86% & Silver Recoveries Average 77% TSX: KOR OTCQX: CORVF VANCOUVER, June 5, 2013 /PRNewswire/ - Corvus Gold Inc. ("Corvus" or the "Company") - (TSX: KOR, OTCQX: CORVF) announces the results of a series of cyanide bottle roll tests on sample composites from the Yellow Jacket high-grade gold-silver zone, North Bullfrog, Nevada (Table 1). The results from 22 composites throughout the currently defined high-grade area averaged recoveries of 86%...
LAS VEGAS, June 4, 2013 /PRNewswire/ - Orofino Gold Corp. (PINK OTC: ORFG) ("Orofino Gold" or the "Company") is pleased to announce that in Colombian mining districts of Cerro San Carlos and Santa Cruz areas in the Dept. of Bolívar (Central Cordillera), and the Vetas-California-Angostura region of the Dept. of Santander (Eastern Cordillera) mineralization appears to be Mid- to Late-Jurassic, hosted within intrusive and/or volcanic rocks of similar age. Mineralization and...
VANCOUVER, June 4, 2013 /CNW/ - Kootenay Silver Inc. (TSX VENTURE: KTN.V) ("Kootenay" or the "Company") is pleased to announce assay results from drill holes DH 141 to 188 as part of its Phase V drill and resource expansion program on its flagship Promontorio Silver Project in Sonora, Mexico. Drilling Highlights: DH 186 -- 301 gpt Silver Eqv. Over 31.7 Meters(200 gpt Ag, 1.21 gpt Au and 1.79% Pb+Zn); o Including 1,046 gpt Silver Eqv....
-- $1,300 base case NPV5% increases 127% to $146.8M with IRR of 23% -- Recoverable ounces increase 12% to 852,700 gold & 333,200 silver -- Total cash costs drop 5% to $778 per ounce of gold VANCOUVER, June 4, 2013 /PRNewswire/ - Corvus Gold Inc. ("Corvus" or the "Company") - (TSX: KOR, OTCQX: CORVF) announces the results of an independently prepared Preliminary Economic Assessment ("PEA") for the optimization of the North...
Company invites Main Street and Wall Street investors to attend interactive real-time virtual conference NEW YORK, June 4, 2013 /PRNewswire/ -- Comstock Mining Inc. (NYSE MKT: LODE) today announced that Kimberly Shipley, Manager of Investor Relations, will present at RetailInvestorConferences.com. DATE: June 6, 2013 TIME: 1:00 PM EDT LINK: www.retailinvestorconferences.com > click on the red "register / watch event now" button This will be a live, interactive online...
ST. LOUIS, June 3, 2013 /PRNewswire/ -- Arch Coal, Inc. (NYSE:ACI) today announced that its Arch Coal Asia-Pacific Pte. Ltd. subsidiary has increased its profile in China to help meet growing global demand for metallurgical and thermal coals. Arch has established an office in Beijing's Chaoyang District and hired Zhang Shijie to lead the effort. He will report to Renato Paladino, president of Arch Coal Asia-Pacific. (Logo: http://photos.prnewswire.com/prnh/20120727/CG47668LOGO)...
GOLDEN, Colo., June 3, 2013 /PRNewswire/ -- Atna Resources Ltd. ("Atna" or the "Company") (TSX:ATN / OTCQB:ATNAF) wishes to provide more detail on the announcement of May 29, 2013 advising of its intention to reduce the scale of underground mining operations at its Pinson gold mine located near Winnemucca, Nevada. The Company has made the decision to reduce the mining rate in order to: Concentrate on ore mining from accessible, already developed ore stopes. Review and...
LONDON, June 3, 2013 /PRNewswire/ -- Edison Investment Research, a leading international investment research firm, announces the initiation of coverage of Duluth Metals (TSX: DM), a mineral development company focused on developing its Twin Metals Minnesota (TMM) copper-nickel-platinum group metals project. (Logo: http://photos.prnewswire.com/prnh/20130417/608168 ) Edison's comprehensive report, Steadily unlocking value, was published today, and examines the...
Latest Economic geology Reference Libraries
Bornite is a sulfide mineral with chemical composition Cu5FeS4 that crystallizes in the cubic system. It has a brown to copper-red color on fresh surfaces that tarnishes to an iridescent purple surface. Its purple to bronze iridescence gives it the nickname peacock ore. Bornite is an important copper ore mineral and occurs widely in porphyry copper deposits along with more common chalcopyrite. It also is found in pegmatites. It is important for its copper content of about 63 percent by mass...
Cassiterite is a tin oxide mineral, SnO2. It is generally opaque, but is translucent in thin crystals. Its luster and multiple crystal faces produce a desirable gem. Cassiterite is the chief ore of tin today. Most sources of cassiterite today are found in alluvial or placer deposits containing the resistant weathered grains. The best source of primary cassiterite is the tin mines of Bolivia, where it is found in hydrothermal veins. Cassiterite is a widespread minor constituent of igneous...
Chalcocite, copper(I) sulfide (Cu2S), is an important copper mineral ore. It is opaque, being colored dark-gray to black with a metallic luster. It has a hardness of 2½ - 3. It is a sulfide with an orthorhombic crystal system. Chalcocite is sometimes found as a primary vein mineral in hydrothermal veins. However, most chalcocite occurs in the supergene enriched environment below the oxidation zone of copper deposits as a result of the leaching of copper from the oxidized minerals. It is...
Hematite (AE) or haematite (BE) is the mineral form of Iron (III) oxide, (Fe2O3), one of several iron oxides. The ore sometimes contains slight amounts of titanium. When shaped into ornaments, it is often called black diamond. Hematite is a very common mineral, coloured black to steel or silver-gray, brown to reddish brown, or red. It is mined as the main ore of iron. Varieties include Bloodstone, Iron Rose, Kidney Ore, Martite, Paint Ore, Specularite (Specular Hematite), Rainbow Hematite...
Magnetite is a magnetic mineral form of both iron(II) oxide and iron(III) oxide or (iron(II,III) oxide), with chemical formula Fe3O4, one of several iron oxides and a member of the spinel group. Magnetite is the most magnetic of all the minerals on Earth, and these magnetic properties led to lodestone being used as an early form of magnetic compass. Small grains of magnetite occur in almost all igneous rocks and metamorphic rocks as well as many sedimentary rocks. Magnetite is a...
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