Trace elements in pyrite from orogenic gold deposits
Trace elements in pyrite from orogenic gold deposits: Implications for metallogenic mechanism CAO GenShen 1,2,3,ZHANG Yu 3,,,CHEN HuaYong 1,2,4 The extraction of gold from refractory gold ores (RGOs) without side reactions is an extremely promising endeavor. However, most RGOs contain large Recovery of gold from refractory gold ores: Effect of pyrite
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Pyrite as a Microtextural and Geochemical Tracer of Ore
Gold deposition in structurally controlled deposits is triggered by changes in the mineralizing fluid conditions. Recent research has demonstrated that in deposits with Advanced quantitative in situ LA-ICP-MS analysis can provide precise trace element compositions of pyrite with complex textures, and the compositions of Pyrite zonation and source of gold in the Pangjiahe orogenic gold
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Mineralogical characteristics and recovery process
Pyrite Arsenopyrite Clay mineral Process optimization 1. Introduction The substantial increase in gold production (4355.07 t in 2019) has consumed an outsized The ore deposit classes considered here include orogenic gold deposits, Carlin-type gold deposits, high- and low-sulfidation gold deposits, and Au-bearing Trace elements in pyrite from five different gold ore deposit
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A new kind of invisible gold in pyrite hosted in deformation
Ores with invisible gold are characterized by trace amounts of gold hosted in sulfide minerals (from a few parts per million to several thousand parts per million), Analysis of the texture and geochemical composition of pyrite suggested that invisible gold was primarily present in pyrite in the form of solid solution (Au +), Implications of pyrite geochemistry for gold mineralisation
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The recovery of gold from refractory arsenopyrite
The ongoing depletion of gold and silver-containing ore deposits demands a shift towards the processing of more complex sources. Leaching of gold or silver from these sources, which are named refractory and are typically low-grade, can be complicated due to one or more of the following effects: (1) kinetic or thermodynamic impediments on Microscopically visible gold occurs in pyrite ore as metal particles of >0.1 µm in size, together with so called “invisible” gold, undetectable by conventional microscopic methods. The chemical, redox and structural state of this invisible gold and the mechanisms of its incorporation into pyrite remain both inconsistent and controversialThe nature and partitioning of invisible gold in the pyrite
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Trace elements in pyrite from five different gold ore deposit
We provide a global compilation of over 20 000 chemical data points resulting from over 5520 spot measurements of pyrites from five separate ore deposit classes, each of which is known to have high gold concentrations. The ore deposit classes considered here include orogenic gold deposits, Carlin-type gold deposits, high- and low The in-situ trace elements and sulfur isotopic composition of pyrite can indicate the genesis and growth history of pyrite, and thus provide critical information on the evolution of ore-forming fluids, the source of ore-forming materials, and the genesis of ore deposits (Chao et al., 2020, Hu et al., 2019, Zhou et al., 2019). Pyrite is theInfluence of fluid-rock interaction on gold ScienceDirect
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How to Separate Gold from Pyrite 911 Metallurgist
In panning large samples, only one or two specks of gold could be seen, although the ore contained from 1 to 2 ounces per ton. This ore yielded only about 40 per cent, on being amalgamated, but over 90 per cent, was dissolved out by leaching the raw ore with cyanide of potassium, and similar results were obtained by chlorination.Corrigendum to “Geochronology and origin of the Sarekoubu gold deposit, southern Altaides, China: Ar-Ar dating of vein quartz and Cu-Zn-Fe isotopes” [Ore Geol. Rev. 124 (2020)103642, 9–10] Jiuhua Xu, Hui Zhang, Longhua Lin, Xing Xiao, Chunjing BianOre Geology Reviews Vol 140, January 2022 ScienceDirect
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Early Permian lode gold mineralization in the northern North
The auriferous quartz veins are mainly hosted in the mafic gneiss and migmatite of the Neoarchean Xiaotazigou Formation along NNW- and NE-striking faults, with pyrite as the predominant ore mineral. The gold mineralization process can be divided into two stages, involving stage I quartz-pyrite and stage II quartz-calcite-polymetallic sulfide.Pyrite and arsenopyrite are the two main gold-bearing minerals in the ALRG gold ore. The content of pyrite is 3.47 %, which is high‑sulfur lean‑iron pyrite in this gold ore, and the disseminated particle size is in the range of 0.01–0.2 mm. Arsenopyrite is the main arsenic-bearing mineral with a content of 0.45 %.Mineralogical characteristics and recovery process
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In-situ trace elements on pyrite and arsenopyrite of the
Gold ore occurs mainly as quartz veins and altered slates, hosted by faults and shear zones in the low-grade metamorphosed Neoproterozoic Lengjiaxi Group. Plastic deformation of wall rocks and ore-related pyrite vein (V2) in the Zhaoxian deposit (Fig. 4 A-D) are far weaker than that in some orogenic gold deposits (Tomkins et al., Arsenious and sulphur-bearing micro-disseminated gold ore is a kind of typical refractory Carlin-Type. The gold in Carlin-Type gold ore grains is distributed finely, existing as invisible or submicroscopic gold, encapsulated in arsenopyrite and pyrite. The technical difficulty of treatment Carlin-Type gold ore lies in how to release the fine gold Minerals Free Full-Text Mineral Phase Evolution during
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Pyrite (Fool’s Gold) Properties, Formation,
References. Pyrite, also known as “fool’s gold,” is a common iron sulfide mineral with the chemical formula FeS2. It forms in a variety of geological settings through several processes. Formation: In the mineralized phyllite (Fig. 7 A; Appendix A), LA-ICP-MS mapping of zoned pyrite shows that Py2 is the main hydrothermal ore-stage pyrite, contains several hundred ppm Au, and has the highest Ni, Cu, As, Ag, and Sb contents. Py3 has lower Au, Ni, Cu, As, Ag, and Sb contents than Py2, indicating that it represents late ore-stage pyrite.Pyrite zonation and source of gold in the Pangjiahe orogenic gold
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Pyrite trace element behavior in magmatic-hydrothermal
Pyrite from nine copper–gold ore deposits was imaged for trace element patterns. • All pyrites have similar trace element signatures but different concentrations. • Most copper and gold mineralization forms after pyrite. • Trace element imaging of pyrite can be used to vector toward these ore deposits.The Oroya Shoot (> 62 t Au) in the giant Golden Mile deposit, Yilgarn Craton, Western Australia is controlled by reverse faults, which offset altered quartz diorite porphyry but are crosscut by a late-mineralization kersantite dyke (> 2642 ± 6 Ma). Oroya stage 1 ore (12–14 g/t Au) is characterized by chert-like quartz, Fe-chlorite, siderite and Early pyrite and late telluride mineralization in vanadium-rich gold
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Micro-Geochemistry of Pyrite and Gold Mineral in Jiaodong Gold
Pyrite; Gold mineral; Ore-forming fluids and materials; Download chapter PDF 4.1 Introduction. The Jiaodong gold province is one of the largest gold-producing areas in China. There are 159 gold mines in the Jiaodong Peninsula producing a combined 30 tons of Au per year (Yang et al.As is typically commonplace, gold can occur in nature as free gold and/or as various alloys by forming a complete series of solid solutions with other metals including silver, platinum metals, and so on (Jones and Fleischer 1969).Generally, native gold occurs in hard rock minerals via four forms including lattice gold in other minerals mainly Correlations between trace elements in pyrite and gold
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Scientists Discover Hidden Value of Fool’s Gold
Iron pyrite, also known as fool’s gold, has been fooling people for years, but it might have more value than previously thought. By Mackenzie Myers Fowler. Pyrite, a shiny, brassy mineral also known as fool’s gold, thwarted miners time and time again during the Gold Rush of the mid-19th century. Even today, someone panning for gold mightMany gold deposits contain finely disseminated gold particles in iron sulfide minerals such as pyrite. These minerals are called refractory gold ores because of the presence of gold, which occurs either as disseminated fine gold particles—typically <1 µm [] or as fine particles of gold encapsulated in the ore host [2,3].In certain ores, extraction Minerals Free Full-Text Gold Extraction from a Refractory
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Fluid and ore-material source of the Xiajiaxiaohe gold
As the most widespread and important gold-bearing mineral (Ross et al. 2009), the geochemical characteristics of pyrite can provide important information for gold mineralization and be used as an exploration tool (Jiang et al. 2003; Li and Li 2019).Trace elements of pyrite can indicate the ore-formation temperature and constrain the ore-fluid Abstract—For the first time, EPMA and LA-ICP-MS data were obtained for the Kyuchus Au–As–Sb–Hg deposit on variations in the grades and zonal distribution of gold and other impurity elements in gold-bearing sulfides of disseminated ores. Two types of zoning have been found in pyrite: (1) zoning with the central zone depleted in impurities Invisible Gold and Other Impurity Elements in Pyrite and
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