Textural control on gold distribution in As-free pyrite from the Dongping, Huangtuliang and Hougou gold deposits, North China Craton (Hebei Province, China)

Cook, Nigel J.; Ciobanu, Cristiana L.; Mao, Jingwen

doi:10.1016/j.chemgeo.2009.02.020

Cited by 349 publications

(165 citation statements)

References 39 publications

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“…This outcome was supported by Norman et al (2004) who highlighted the importance of molybdenite trace-element data, notably Bi, for fingerprinting mineralization in granitic settings. Recently, Ciobanu et al (2013), confirmed the usefulness of this kind of et al 1993). No tungstenite was ever reported from this type of deposits in the Bohemian Massif.…”

Section: Introductionsupporting

confidence: 49%

“…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%

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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

J. 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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Section: Introductionsupporting

confidence: 49%

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

J. Geosci.

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“…A second, related problem, commonly observed but not restricted to studies of gold-bearing pyrite and arsenopyrite, is that areas of a grain with abundant microfractures, pores and non-sulphide inclusions, can contain significantly more Au than 'clean' areas without inclusions and/or pore-rich domains in pyrite and arsenopyrite (e.g., [46][47][48]). An assessment should therefore be made of whether grain-scale compositional heterogeneity (including chemical zoning) is present-either by creating a LA-ICP-MS map, or if simply by comparing absolute concentrations from a number of randomly positioned spot analyses.…”

Section: What Is Being Analyzed?mentioning

confidence: 99%

Trace Element Analysis of Minerals in Magmatic-Hydrothermal Ores by Laser Ablation Inductively-Coupled Plasma Mass Spectrometry: Approaches and Opportunities

et al. 2016

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Laser ablation inductively-coupled plasma mass spectrometry (LA-ICP-MS) has rapidly established itself as the method of choice for generation of multi-element datasets for specific minerals, with broad applications in Earth science. Variation in absolute concentrations of different trace elements within common, widely distributed phases, such as pyrite, iron-oxides (magnetite and hematite), and key accessory minerals, such as apatite and titanite, can be particularly valuable for understanding processes of ore formation, and when trace element distributions vary systematically within a mineral system, for a vector approach in mineral exploration. LA-ICP-MS trace element data can assist in element deportment and geometallurgical studies, providing proof of which minerals host key elements of economic relevance, or elements that are deleterious to various metallurgical processes. This contribution reviews recent advances in LA-ICP-MS methodology, reference standards, the application of the method to new mineral matrices, outstanding analytical uncertainties that impact on the quality and usefulness of trace element data, and future applications of the technique. We illustrate how data interpretation is highly dependent on an adequate understanding of prevailing mineral textures, geological history, and in some cases, crystal structure.

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“…Numerous studies have been concerned with the content and distribution of Au in sulfide minerals, particularly in pyrite and arsenopyrite (e.g., Benzaazoua et al 2007;Wagner et al 2007;Cook et al 2009;Koglin et al 2010;Majzlan et al 2010; Thomas et al 2011). Pyrite has also been investigated for other trace and minor elements.…”

Section: Introductionmentioning

confidence: 99%

Gold-bearing ferroselite (FeSe2) from Trogtal, Harz, Germany, and significance of its Co/Ni ratio

Cabral¹,

Koglin²,

Brätz³

2013

J. Geosci.

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Ferroselite from Trogtal, the type locality of the cobalt selenide trogtalite, in the Harz Mountains, Germany, forms a trogtalite-ferroselite assemblage in pockets of massive clausthalite in which specular hematite is dispersed. The pockets occur in hematite-impregnated carbonate veins, emplaced in a reddened greywacke of Lower Carboniferous age. Ferroselite contains ~0.2-5.0 ppm Au; trogtalite has even higher Au contents. Ferroselite has Co/Ni ratios mostly above unity. These characteristics likely reflect oxidizing brines with Co/Ni > 1, such as those involved in the formation of sediment-hosted copper deposits.

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Textural control on gold distribution in As-free pyrite from the Dongping, Huangtuliang and Hougou gold deposits, North China Craton (Hebei Province, China)

Cited by 349 publications

References 39 publications

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

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

Trace Element Analysis of Minerals in Magmatic-Hydrothermal Ores by Laser Ablation Inductively-Coupled Plasma Mass Spectrometry: Approaches and Opportunities

Gold-bearing ferroselite (FeSe2) from Trogtal, Harz, Germany, and significance of its Co/Ni ratio

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