نتایج جستجو برای: gold ore treatment
تعداد نتایج: 1476695 فیلتر نتایج به سال:
The Sebandoon Barite (gold-silver) deposit is located about 20 km NW of the Kashmar in the Central Iran. The rock units exposed in the area consist of Eocene volcano-sedimentary sequences of lithic tuff, rhyolitic tuff, tuffaceouce shale, lapilli tuff and agglomerate associated with pyroxene andesite and trachyandesite. The barite is composed of lenticular, banded and stockwork mineralization a...
At the Bonfim mine, cyanide processing used to extract gold from abandoned tailings represents an important environmental concern. In order to evaluate cyanide concentrations, twenty samples of sediments of the main streams crossing the mine site, and ten samples of the five mainly tailings were analyzed for total cyanide. Cyanide was found in two samples of tailings (0.83 and 1.44mg/Kg of tota...
Abstract The Baiyun gold deposits in the Qingchengzi ore concentration area have significant deep exploration potential. Transient electromagnetic (TEM) is conducted to identify ore-bearing strata and ore-controlling structures mining area’s periphery. Previous tests revealed that it challenging penetrate conductive layer obtain information using a conventional in-loop TEM method with an induct...
The goal of this paper is a first attempt to link the geology and mineral deposits of the Gondwana GIS, called GO-GEOID, to spatial statistics and map modelling. Such integration allows, for example, meaningful identification of the mineral potential of unexplored regions relative to those around them that are known to host major ore deposits. We use gold and tin deposits of Africa to derive pr...
A Life Cycle Inventory (LCI) was assembled for gold production extending from the formation of gold-ore deposits through the production of semi-refined gold-silver bullion. Inputs traditionally considered in life cycle assessment (LCA) such as energy, materials, and capital were counted along with geologic inputs and labor. Emergy, rather than traditional LCA methods, was used to make inventory...
Raman spectroscopy of efflorescent sulfate salts from Iron Mountain Mine Superfund Site, California.
The Iron Mountain Mine Superfund Site near Redding, California, is a massive sulfide ore deposit that was mined for iron, silver, gold, copper, zinc, and pyrite intermittently for nearly 100 years. As a result, both water and air reached the sulfide deposits deep within the mountain, producing acid mine drainage consisting of sulfuric acid and heavy metals from the ore. Particularly, the draina...
The Norilsk ore district is one of the world leaders in production platinum metals. Long-term research focused on detection sulfide platinum-copper-nickel ores contributed to accumulation a large volume scientific material geology and mineralization area. Despite this, issue composition initial melt for ore-bearing intrusive complexes its degree enrichment with noble metals remains open. Intrus...
The Hirvilavanmaa (Au-only) and Naakenavaara (Cu-Co-Au-Ni) deposits, located only 5 km apart in the Paleoproterozoic Central Lapland belt (CLB) northern Finland, represent two types of orogenic gold mineralization that dominate CLB: (1) Au-only (2) Au with atypical metal association, respectively. In this study, we compare these deposits order to pinpoint origin differences their associations. ...
BACKGROUND In 2010, Médecins Sans Frontières discovered a lead poisoning outbreak linked to artisanal gold processing in northwestern Nigeria. The outbreak has killed approximately 400 young children and affected thousands more. OBJECTIVES Our aim was to undertake an interdisciplinary geological- and health-science assessment to clarify lead sources and exposure pathways, identify additional ...
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