Invisible gold

Волков, А. В.; Sidorov, A. A.

doi:10.1134/s1019331617010051

Cited by 7 publications

(6 citation statements)

References 10 publications

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“…LA-ICP-MS trace element analysis of metasomatic Py3 and Apy1 made it possible not only to determine a range of trace elements, but also to analyze the relationship between Au and various components of the system. Trace elements, including Au, can be found in pyrite in various forms: solid solution, nanoparticles, and microinclusions [15,17,61,68,69].…”

Section: Invisible Gold and Its Relationship With Other Elements In P...mentioning

confidence: 99%

“…This allows us to conclude that the elevated Au content in Py3 and Apy1 may be due to the presence of micro-and nanoinclusions of native gold. Low content is typical for gold incorporated in the crystal lattice of pyrite or its defects [17,60,68,[70][71][72].…”

Section: Invisible Gold and Its Relationship With Other Elements In P...mentioning

confidence: 99%

“…Recent research has shown great economic value of the insufficiently studied disseminated gold-bearing pyrite and arsenopyrite mineralization in the YKMB (see [10][11][12][13][14][15] and references therein). Disseminated sulfide mineralization is known both within the gold deposits [10,11,[15][16][17][18][19]] and in regional sulfidation zones [17,[20][21][22] localized in transcrustal faults [12,23].…”

Section: Introductionmentioning

confidence: 99%

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Disseminated Gold–Sulfide Mineralization in Metasomatites of the Khangalas Deposit, Yana–Kolyma Metallogenic Belt (Northeast Russia): Analysis of the Texture, Geochemistry, and S Isotopic Composition of Pyrite and Arsenopyrite

et al. 2021

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At the orogenic gold deposits of the Yana–Kolyma metallogenic belt (northeast Russia) both Au–quartz-sulfide mineralization with native gold and disseminated sulfide mineralization with invisible Au developed. The textural and mineralogical-geochemical features, isotope-geochemical characteristics of gold-bearing sulfides from proximal metasomatites, and possible forms of Au occurrence in pyrite and arsenopyrite have been studied using electron microprobe, atomic absorption, LA-ICP-MS trace element, isotope analysis, and computed microtomography. Four generations of pyrite (Py1, diagenetic; Py2, metamorphic; Py3, metasomatic; Py4, veined) and two generations of arsenopyrite (Apy1, metasomatic; Apy2, veined) have been identified at the Khangalas deposit. In the proximal metasomatites, the most common are Py3 and Apy1. Studying their chemical composition makes it possible to identify the features of the distribution patterns of typochemical trace elements in pyrite and arsenopyrite, and to establish the nature of the relationship between Au and these elements. In Py3 and Apy1, structurally bound (solid solution) Au+ prevails, isomorphically entering the crystal lattice or its defects. Isotope characteristics of hydrothermal sulfides (d34S = –2.0 to –0.6‰) indicate that mantle/magmatic sulfur was involved in the formation of the deposit, though the participation of sulfur from the host rocks of the Verkhoyansk clastic complex cannot be ruled out. The Khangalas deposit has much in common with other gold deposits of the Yana–Kolyma metallogenic belt, and from this point of view, the results obtained will help to better reveal their gold potential and understand their origin.

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Section: Invisible Gold and Its Relationship With Other Elements In P...mentioning

confidence: 99%

Section: Invisible Gold and Its Relationship With Other Elements In P...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Disseminated Gold–Sulfide Mineralization in Metasomatites of the Khangalas Deposit, Yana–Kolyma Metallogenic Belt (Northeast Russia): Analysis of the Texture, Geochemistry, and S Isotopic Composition of Pyrite and Arsenopyrite

et al. 2021

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“…Stibnite and valentinite are associated with native antimony Levitan (2008). The antimony content increases towards the near-surface area, and decreases in the deep zone (between 0.2 and 0.3%) (Volkov and Sidorov 2017). Nevertheless, the isotopic composition of the antimony sulfur showing close values within the d 34 S of the interval from -3.8 to 2.5 % ( Kovalev et al 2014).…”

Section: Om and Gold Mineralizationmentioning

confidence: 99%

“…The so-called type ''invisible gold'' as first described by Bürg (1930), is ionic gold (or submicroscopic form) in the form of a solid solution structurally binding in arsenic sulfides (Cabri et al 1989;Cook and Chryssoulis 1990;Fuxin et al 2001;Vikent'ev 2006;Wu et al 2016;Volkov et al 2017;Osovetsky 2017;Large and Maslennikov 2020), which is not detectable by electron microscopy, being smaller than 0.1 lm (up to 10 nm) with concentration less than 0.5 ppm (Cook and Chryssoulis 1990;Large and Maslennikov 2020) It accounts for 10%-15% of world gold production (Berger 2014). Gold content generally increases with arsenic content (Fleet et al 1993), possibly related to arsenic content in the host mineral (Cabri et al 1989) which is common in arsenopyrite (Cook and Chryssoulis 1990), since gold can substitute Fe in the arsenopyrite lattice (Wu and Delbove 1989).…”

Section: Introductionmentioning

confidence: 99%

Preliminary analysis on roles of metal–organic compounds in the formation of invisible gold

et al. 2021

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The paper comprises new analytical data on the nature and occurrence of gold in solid pyrobitumen, closely associated with the main gold-bearing sulfide arsenic ores of the Bakyrchik gold deposit (Kazakhstan), related to post-collisional magmatic-hydrothermal origin. Gold mineralization of the deposit occurs mainly in the form of an “invisible” type of gold in the structures of arsenian pyrite and arsenopyrite, and the form of gold-organic compounds of pyrobitumen in carbonaceous-terrigenous sequences of Carboniferous formation. Microscopic and electron microscopic analysis, Raman and FT-Infrared analysis, mineralogical and three-step sequential extraction analysis (NH2OH·HCl, H2O2, HNO3 + HCl) has been carried out using 9 ore samples (from 3 different types of ores) for a comprehensive study of pyrobitumen and sulfide arsenic ores focusing mainly on organic matter. The sequentially extracted precious metal content of pyrobitumen reaches up to 7 ppm gold and other metals like Ag 4 ppm, Pt 31 ppb, and Pd 26 ppb, forming metal–organic compounds, while arsenic sulfide minerals incorporate 11 ppm gold, 39 ppm Ag, 0.49 ppm Pt. The enrichment of gold associating with organic matter and sulfide ore minerals was confirmed in this study. Organic matter was active in the migration of gold and the capture of gold by pyrobitumen. Moreover, the reductive organic matter agent released gold, most likely for the sulfide arsenic ore minerals. Pyrobitumen was a decisive factor in the concentration, transportation, and preservation of gold in the deposit.

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The interaction mechanism and collecting performance of three sulfydryl collectors with Au(1 0 0) surface: A study combining DFT and molecular dynamics

Tao

Tang

Chen

et al. 2023

Journal of Molecular Liquids

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Invisible gold

Cited by 7 publications

References 10 publications

Disseminated Gold–Sulfide Mineralization in Metasomatites of the Khangalas Deposit, Yana–Kolyma Metallogenic Belt (Northeast Russia): Analysis of the Texture, Geochemistry, and S Isotopic Composition of Pyrite and Arsenopyrite

Disseminated Gold–Sulfide Mineralization in Metasomatites of the Khangalas Deposit, Yana–Kolyma Metallogenic Belt (Northeast Russia): Analysis of the Texture, Geochemistry, and S Isotopic Composition of Pyrite and Arsenopyrite

Preliminary analysis on roles of metal–organic compounds in the formation of invisible gold

The interaction mechanism and collecting performance of three sulfydryl collectors with Au(1 0 0) surface: A study combining DFT and molecular dynamics

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