Invisible gold in arsenian pyrite and arsenopyrite from a multistage Archaean gold deposit: Sunrise Dam, Eastern Goldfields Province, Western Australia

Sung, Yoo-Hyun; Brugger, Joël; Ciobanu, Cristiana L.; Pring, Allan; Skinner, William; Nugus, Michael

doi:10.1007/s00126-009-0244-4

Cited by 245 publications

(87 citation statements)

References 38 publications

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“…Sung et al (2009) Au in samples form the high-sulfidation epithermal Au deposit in Yanacocha, Peru. These anomalous behaviours of Au in arsenian pyrite were attributed to temperature of pyrite formation, kinetics and rate of growth, association of other trace elements or "proximity effects", electrochemical features of pyrite mineral surface, and speciation of Au and As in the mineralizing fluid, and in pyrite itself (Becker et al, 2001;Mikhlin et al, 2011).…”

Section: Mechanisms Of Au and As Incorporationmentioning

confidence: 99%

“…Similar to pyrite from Carlin-type deposits, growth zoning is a major factor controlling element distribution in pyrite in orogenic deposits. (Goldfarb et al, 2005;Large et al, 2007;Morey et al, 2008;Large et al, 2009;Sung et al, 2009;Thomas et al, 2011). The complexity of pyrite growth reflects the multistage evolution of orogenic Au deposits, where Au deposition is usually related to episodic pumping of fluids produced during greenschist to amphibolite facies devolatilization and that are structurally channelled into the retrograding parts of an orogen (Sibson et al, 1988;Goldfarb et al, 2005).…”

Section: Zoning Textures and Conditions Of Arsenian Pyrite Formationmentioning

confidence: 99%

“…Gold tends to concentrate in As-rich zones and/or zones of intense brittle deformation in coarse-grained pyrite, in the relicts of framboidal pyrite (if preserved), and in areas of extensive pyrite recrystallization due to interaction with Au-bearing hydrothermal fluids. Gold content in pyrite decreases to < 1 ppm in pristine, unzoned pyrite (Ho et al, 1995;Large et al, 2007;Morey et al, 2008;Cook et al, 2009;Large et al, 2009;Sung et al, 2009;Thomas et al, 2011;Velásquez et al, 2014). Some generations of pyrite at Bendigo, Victoria, Australia, also reveal syndeformational growth marked by coupled changes in the concentrations of Au and As (Thomas et al, 2011).…”

Section: Zoning Textures and Conditions Of Arsenian Pyrite Formationmentioning

confidence: 99%

“…6a). In orogenic deposits, the analysed pyrite is related to a large variety of protholith including: black shales, intermediate volcanic rocks, granitic rocks and felsic porphyries, banded iron formations; and host-rocks include: dolerite, basalts, metabasalts, syenite, and ryodacite (Ho et al, 1995;Large et al, 2007;Wood and Large 2007;Morey et al, 2008;Cook et al, 2009;Sung et al, 2009;Thomas et al, 2011;Valásquez et al, 2014). Most pyrite analyses in these systems cluster within the same area in Au-As plots.…”

Section: Orogenic Au Depositsmentioning

confidence: 99%

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The coupled geochemistry of Au and As in pyrite from hydrothermal ore deposits

Deditius¹,

Reich²,

Kesler³

et al. 2014

Geochimica et Cosmochimica Acta

469

205

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The ubiquity of Au-bearing arsenian pyrite in hydrothermal ore deposits suggests that the coupled geochemical behaviour of Au and As in this sulfide occurs under a wide range of physico-chemical conditions. Despite significant advances in the last 20 years, fundamental factors controlling Au and As ratios in pyrite from ore deposits remain poorly known. Here we explore these constraints using new and previously published EMPA, LA-ICP-MS, SIMS, and μ-PIXE analyses of As and Au in pyrite from Carlin-type Au, epithermal Au,

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Section: Mechanisms Of Au and As Incorporationmentioning

confidence: 99%

Section: Zoning Textures and Conditions Of Arsenian Pyrite Formationmentioning

confidence: 99%

Section: Zoning Textures and Conditions Of Arsenian Pyrite Formationmentioning

confidence: 99%

Section: Orogenic Au Depositsmentioning

confidence: 99%

See 2 more Smart Citations

The coupled geochemistry of Au and As in pyrite from hydrothermal ore deposits

Deditius¹,

Reich²,

Kesler³

et al. 2014

Geochimica et Cosmochimica Acta

469

205

View full text Add to dashboard Cite

show abstract

“…Cook et al 2009Cook et al , 2013Large et al 2009Large et al , 2014Sung et al 2009;Lin et al 2011;Thomas et al 2011;Pašava et al 2013Pašava et al , 2015Pašava et al , 2016 that Electron Microprobe Analysis (EMPA) and Laser Ablation Inductively Coupled Mass Spectroscopy (LA-ICP-MS) spot analyses and mapping are very useful for documentation and interpretation of trends of trace-element distribution in sulfides such as pyrite, arsenopyrite and sphalerite. Blevin and Jackson (1998) used LA-ICP-MS to measure a number of elements in molybdenite containing both Bi-mineral inclusions and Au.…”

Section: Introductionmentioning

confidence: 99%

Molybdenite-tungstenite association in the tungsten-bearing topaz greisen at Vítkov (Krkonoše-Jizera Crystalline Complex, Bohemian Massif): indication of changes in physico-chemical conditions in mineralizing system

Pašava¹,

Veselovský²,

Drábek³

et al. 2015

Jour. Geosci.

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At Vítkov, sparse molybdenite occurs within tungsten mineralization hosted by topaz greisen in orthogneiss in the envelope of the Variscan Krkonoše-Jizera granite Pluton (northern Bohemian Massif). Mineralogical study showed that sulfide mineralization started with precipitation of arsenopyrite followed by molybdenite, tungstenite, transitional Mo-and W-dominated disulfides and concluded by pyrite. Textural relationships between molybdenite and tungstenite imply that tungstenite was formed during several stages related to molybdenite bending and fracturing. Laser Ablation Inductively Coupled Mass Spectrometry (LA-ICP-MS) analyses of Re-poor (< 0.3 ppm) molybdenite showed extreme concentrations of W (up to 26 558 ppm) accompanied by Ag, As, Bi, Pb, Se, Te and other metals. Electron microprobe analyses of inclusions-free molybdenite confirmed the abundance of W (~0.5 wt. %) and tungstenite showed ~4 wt. % Mo, indicating a substitution of Mo 4+ for W 4+. Stability and phase relationships between molybdenite and tungstenite and locally identified transitional Mo-and W-dominated disulfidic phases suggest that tungstenite crystallization was triggered by a decrease in fO 2 below WO 2 -WO 3 buffer that followed after molybdenite precipitation. Tungstenite zoning and sharp tungstenite-molybdenite contacts indicate disequilibrium during their formation.

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LA–ICP–MS and EPMA studies on the Fe–S–As minerals from the Jinlongshan gold deposit, Qinling Orogen, China: implications for ore‐forming processes

Zhang

Gilbert

et al. 2014

Geological Journal

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The Jinlongshan gold deposit, Shaanxi Province, is a large Carlin‐type deposit in the Western Qinling Gold Province (WQGP) in the Qinling Orogenic Belt, Central China. In this study, we present new EPMA and LA–ICP–MS geochemical data on the Fe–S–As minerals at Jinlongshan, which consist mainly of pyrite, arsenian pyrite and arsenopyrite. Diagenetic pyrite (Py0) is preferentially hosted in the sedimentary rocks as rounded or framboidal aggregates. Three types of hydrothermal pyrite (Py1, Py2 and Py3) and two types of arsenopyrite (Apy1 and Apy2) were newly identified in the ores and wall‐rocks: fine‐grained Py1 and Apy1 were formed at the early mineralization stage; coarse‐grained Py2 and Apy2 were formed at the middle mineralization stage; and Py3 with stibnite were formed at the late mineralization stage. Their trace elements differ in concentrations, associations and rim–core zonations, implying different genesis and crystallization processes. Py0 is As‐poor (Au < 0.105 wt% and As < 0.094 wt%); Py1 and Py2 are Au–As‐rich (Au = 1.9–113 ppm and As up to 7.270 wt%); Py3 is Au–As‐poor (Au = 0.03–11.4 ppm and As < 0.56 wt%); and Apy1 and Apy2 show the highest Au concentration (up to 576 ppm). Co, Ni and As (±Se and Te) occur in pyrite as isomorphism, and Ag, Cu, Pb and Zn are distributed primarily as invisible or visible sulphide inclusions. The dominant state of Au in the hydrothermal Fe–S–As minerals at Jinlongshan is lattice bound Au+1, and possibly invisible Au0 nanoparticles, whereas in the diagenetic Py0, the dominant state is mainly Au0. By integrating the evidence from ore deposit geology, mineral morphology, internal structure and trace element geochemistry of the Au‐bearing Fe–S–As minerals, it is concluded that the formation of the Jinlongshan Au deposit may have been related to the regional metallogenic episode at around 170 Ma in the WQGP, which was coeval with the regional tectonic transition from a collisional compression to a late‐ to post‐collisional extension in the Qinling Orogen. Copyright © 2014 John Wiley & Sons, Ltd.

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Invisible gold in arsenian pyrite and arsenopyrite from a multistage Archaean gold deposit: Sunrise Dam, Eastern Goldfields Province, Western Australia

Cited by 245 publications

References 38 publications

The coupled geochemistry of Au and As in pyrite from hydrothermal ore deposits

The coupled geochemistry of Au and As in pyrite from hydrothermal ore deposits

Molybdenite-tungstenite association in the tungsten-bearing topaz greisen at Vítkov (Krkonoše-Jizera Crystalline Complex, Bohemian Massif): indication of changes in physico-chemical conditions in mineralizing system

LA–ICP–MS and EPMA studies on the Fe–S–As minerals from the Jinlongshan gold deposit, Qinling Orogen, China: implications for ore‐forming processes

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