Mineral/water interactions in tailings from a tungsten mine, Mount Pleasant, New Brunswick

Petrunic, B. M.; Al, Tom A.

doi:10.1016/j.gca.2004.10.031

Cited by 39 publications

(12 citation statements)

References 44 publications

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“…One of our research interests is related to the oxidation of arsenopyrite (FeAsS) in the tailings from the Mount Pleasant Tungsten Mine, which is located approximately 60 km south of Fredericton, NB. The geochemistry, hydrogeology, and mineralogy of the Mount Pleasant Mine tailings has been previously presented by Petrunic and Al (2005), and from this study it is evident that elevated As concentrations occur in the near-surface pore water (maximum of 7.1 mg/L). The abiotic and biotic oxidation of arsenopyrite under a variety of conditions (e.g., air and aqueous solutions) has been studied previously (e.g., Buckley and Walker 1988;Richardson and Vaughan 1989;Nesbitt et al 1995;Fernandez et al 1996a, b;Nesbitt and Muir 1998;Schaufuss et al 2000;Jones et al 2003;Mikhlin and Tomashevich 2005).…”

Section: Introductionsupporting

confidence: 56%

Geoscience at the nanometre scale: review of analytical transmission electron microscopy applications

Petrunic

Cavé

et al. 2006

atgeol

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This paper describes applications of analytical Transmission Electron Microscopy (TEM) in the geosciences. The topics include: 1) sulphide-mineral oxidation; 2) trace-metal attenuation by secondary Mn oxides; 3) silicate weathering; 4) transition-metal valence in minerals; and 5) secondary Hg minerals in stream sediments. The main advantage of the analytical TEM is the ability to obtain images, chemical information, and electron diffraction patterns at the nanometre scale. With such high spatial resolution, it is possible to observe physical and chemical features in samples that cannot be resolved with most other techniques. This information can lead to signifi cant improvement in our understanding of the system under investigation. Sample preparation techniques that are used in each study are also described in this paper. The preparation of samples for TEM analysis can be challenging because of the heterogeneity commonly encountered in geological materials, the fragility of some geological samples (e.g., low-temperature minerals), and the need to maintain spatial relationships present in the samples. The sample preparation techniques presented are specifi c to the needs of the study and the appropriateness of these methods is demonstrated by the high quality analytical TEM data that are obtained. RÉSUMÉCet exposé décrit des applications de la microscopie électronique à transmission analytique dans les sciences de la terre. Les aspects étudiés comprennent : 1) l'oxydation des minéraux sulfurés; 2) l'atténuation des métaux-traces par des oxydes de Mn secondaires; 3) la silicatisation météorique; 4) la valence des métaux de transition dans les minéraux; et 5) les minéraux de Hg secondaires dans les sédiments fl uviatiles. Le principal avantage qu'offre la MET analytique est la possibilité d'obtenir des images, des données chimiques et des fi gures de diffraction des électrons à l'échelle nanométrique. Une résolution spatiale aussi élevée permet l'observation dans les échantillons de propriétés physiques et chimiques impossibles à éclaircir au moyen de la majorité des autres techniques. De tels renseignements peuvent mener à une amélioration marquée de notre compréhension du système à l'étude. Cet exposé décrit en plus les techniques de préparation des échantillons utilisées lors de chaque étude. La préparation des échantillons à une analyse MET peut s'avérer compliquée en raison de l'hétérogénéité que présentent communément les matières géologiques, de la fragilité de certains échantillons géologiques (p. ex. minéraux à basse température) et de la néces-sité de maintenir les liens spatiaux présents dans les échantillons. Les techniques de préparation des échantillons présentées sont propres aux besoins de l'étude; les données de haute qualité obtenues des analyses MET témoignent de la pertinence de ces méthodes.

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Section: Introductionsupporting

confidence: 56%

Geoscience at the nanometre scale: review of analytical transmission electron microscopy applications

Petrunic

Cavé

et al. 2006

atgeol

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“…However, if we assume that Al and Fe concentrations in these reactors equaled the detection limits of the method (0.1 and 0.9 lmol/L, respectively), then we estimate that abundances of Al-F and Fe-F complexes in the biotic reactors exceeded those in the control reactors by $3 to 5 and 1-2 orders of magnitude, respectively. Formation of Al-F and Fe-F complexes can enhance the solubility and dissolution rate of Al-and Fe-bearing minerals by lowering the activities of Al and Fe in solution (Pulfer et al, 1984;Ž utić and Stumm, 1984;Plankey et al, 1986;Haidouti, 1995;Phillips et al, 1997;Kraemer et al, 1998;Nordin et al, 1999;Harouiya and Oelkers, 2004;Wolff-Boenisch et al, 2004;Petrunic and Al, 2005). Our experiments therefore point to a potentially important bioweathering mechanism where actively metabolizing heterotrophic bacteria increase Al, and to a lesser extent, Fe release from granite by first accelerating the dissolution of co-existing, F-bearing trace phases.…”

Section: Elemental Release Ratesmentioning

confidence: 67%

Characterization of elemental release during microbe–granite interactions at T=28°C

Jacobson

Chen

et al. 2008

Geochimica et Cosmochimica Acta

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“…These characteristics include: mineralogical and geochemical compositions; specific gravity of tailings particles; settling behaviour; permeability vs. density relationships; soil plasticity (i.e. Laboratory methods for the mineralogical and geochemical analysis of tailings solids and waters are given by Jambor (1994), Crock et al (1999), andPetruk (2000). Detailed procedures for tailings sampling, preparation and analysis are found in Ficklin and Mosier (1999).…”

Section: Tailings Characteristicsmentioning

confidence: 99%

Mine Wastes

Lottermoser

2010

346

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Mineral/water interactions in tailings from a tungsten mine, Mount Pleasant, New Brunswick

Cited by 39 publications

References 44 publications

Geoscience at the nanometre scale: review of analytical transmission electron microscopy applications

Geoscience at the nanometre scale: review of analytical transmission electron microscopy applications

Characterization of elemental release during microbe–granite interactions at T=28°C

Mine Wastes

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