نتایج جستجو برای: gold ore province
تعداد نتایج: 167704 فیلتر نتایج به سال:
The copper skarn deposit at Gowdal is located in northeast of Shivardagh batholithic body, north of Ahar, East-Azarbaidjan Province. The Shivardagh intrusive body is a part of the magmatic belt of the Alborz-Azarbaidjan-Lesser Caucasus which in turn is related to the magmatic arc of the Meso-Tethys Ocean. The skarn mineralization of copper, iron, and molybdenum (chalcopyrite, pyrite, molybdenit...
This paper describes native gold in ore-bearing breccias with realgar-orpiment cement from the Vorontsovskoe deposit (Northern Urals, Russia). Particular attention is paid to morphological features of and its relation other minerals. The latter include both common (orpiment, barite, pyrite, prehnite, realgar) rare species (Tl Hg sulfosalts, such as boscardinite, dalnegroite, écrinsite, gillulyi...
The Chah-Bagh gold occurrence is located in Muteh mining district, in the central part of the Sanandaj-Sirjan zone. Gold mineralization occurs in ductile to ductile-brittle shear zones and is comparable with orogenic gold deposits. Silicification and sulfidization are the most important hydrothermal alteration features in the inner parts of altered shear zones and coincide most closely with the...
BACKGROUND During May-June 2010, a childhood lead poisoning outbreak related to gold ore processing was confirmed in two villages in Zamfara State, Nigeria. During June-September of that year, villages with suspected or confirmed childhood lead poisoning continued to be identified in Zamfara State. OBJECTIVES We investigated the extent of childhood lead poisoning [≥ 1 child with a blood lead ...
Controversy surrounds the genetic relationship between gold mineralization and magmatism, especially in deposits granite. Jiaodong Peninsula is leading province China, most are Mesozoic granites; moreover, debate on genesis persists. In eastern Jiaodong, Muping–Rushan belt produces mainly quartz–sulfide vein-type gold, Upper Jurassic Kunyushan granite Late Lower Cretaceous Sanfoshan wall rock. ...
Integrated field studies on environmental levels, bioavailability, biological exposure, and effects SUMMARY Iron-ore is the source of primary iron for the world's iron and steel industries. Almost all (98%) iron-ore is used in steelmaking. Australia and Brazil together dominate the world's iron-ore production, while China is the world's largest iron-ore consumer. In Brazil, iron-ore mining is m...
−− Copper recoveries using two methodologies of acid leaching of a low-grade ore are reported in this work. The ore, abounding in oxidized species, was from Barda González reservoir in Neuquén province, Argentina. In the first methodology, cells of Acidithiobacillus thiooxidans were inoculated into a column containing the ore and sulfur as energy source. In the second one, a bioreactor with imm...
The drum agglomeration of nickel laterite and gold ores has been optimized through the design of experiments (DOE) using a Taguchi L16 (45) orthogonal array to determine the optimum conditions for maximizing average agglomerate size and minimizing the amount of fines. The effects of controllable operating factors including moisture content (nickel laterite ore: 34-37%; gold ore: 7-10%), retenti...
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