Synergies in elemental mobility during weathering of tetrahedrite [(Cu,Fe,Zn)12(Sb,As)4S13]: Field observations, electron microscopy, isotopes of Cu, C, O, radiometric dating, and water geochemistry

Majzlan, Juraj; Kiefer, Stefan; Herrmann, Julia; Števko, Martin; Sejkora, Jiří; Chovan, Martin; Lánczos, Tomáš; Lazarov, Marina; Gerdes, Axel; Langenhorst, F.; Radková, Anežka Borčinová; Jamieson, Heather E.; Milovský, Rastislav

doi:10.1016/j.chemgeo.2018.04.021

Cited by 19 publications

(9 citation statements)

References 56 publications

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“…Cu is less mobile in USGS MAG-1 as 73 to 91% were bound to the residual fraction, compared to only 48 ± 23% in our samples. The higher Cu mobility in the investigated samples might be explained by the presence of sulphide minerals like tetrahedrite whose weathering releases Cu in the advanced state (Majzlan et al 2018). Contrary, Pb is more mobile in the investigated samples where it is predominantly (42 ± 11%) bound to the third fraction, whereas it is dominant (53 to 62%) in the residual fraction in USGS MAG 1.…”

Section: Tablementioning

confidence: 83%

Sequential chemical extraction and mineralogical bonding of metals from Styrian soils

Vollprecht

Riegler

Ahr

et al. 2020

Int. J. Environ. Sci. Technol.

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Geogenic metal contaminations in soils are intensely discussed in waste management, as the recyclability of excavated soil is regulated by limit values for pseudo-total contents in Austria. However, the use of pseudo-total contents overestimates the release of some contaminants such as metals into the environment. Sequential extraction provides an empiric tool to better assess the mobility of metals and predicts their bonding type in individual fractions, but the relation between the obtained fractions and the exact mineralogical bonding is often unclear. Electron microprobe analyses provide detailed mineralogical insights, but do not yield direct information about the mobility of elements. A combination of both methods has been used a few times in soil sciences in general, but never to Styrian soils. Thus, six geogenic contaminated Styrian soils and one compost soil were investigated by a method combination of sequential chemical extraction and electron microprobe analyses. Sequential extraction suggested that Cr in five substrates and As and Ni in one substrate each are bound in stable crystalline minerals, whereas Pb in four samples and Cu in two samples are adsorbed to iron and manganese hydroxides. Elemental mappings obtained by electron microprobe analyses confirmed sequential chemical extraction results and specified that Cu and Pb are bound to manganese (hydr)oxides, As to Fe-Cu-Sb-S compounds, Cr to spinels and Ni to olivine. In summary, the current study gives new information about the mobility and mineralogy of metals in six Styrian soils which is relevant for their possible recycling despite exceeded limit values for pseudo-total content.

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Section: Tablementioning

confidence: 83%

Sequential chemical extraction and mineralogical bonding of metals from Styrian soils

Vollprecht

Riegler

Ahr

et al. 2020

Int. J. Environ. Sci. Technol.

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“…The new life of this important sulfosalt group has implications in both the environmental and technological fields. Indeed, tetrahedrite-group minerals host not only economically valuable metals but also some environmentally significant species, e.g., As, Sb, Hg, and Cd, and some recent studies focused on the weathering of these minerals and the fate of the potentially toxic elements (e.g., Majzlan et al, 2018;Keim et al, 2018). Moreover, the improved knowledge of their crystal chemistry is useful in evaluating the high-tech properties of these compounds (e.g., Chetty et al, 2015;Levinsky et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

“…As, Sb, Hg and Cd, and some recent studies focused on the weathering of these minerals and the fate of the potentially toxic elements (e.g. Majzlan et al , 2018; Keim et al , 2018). Moreover, the improved knowledge of their crystal chemistry is useful in evaluating the high-tech properties of these compounds (e.g.…”

Section: Discussionmentioning

confidence: 99%

Tennantite-(Cd), Cu₆(Cu₄Cd₂)As₄S₁₃, from the Berenguela mining district, Bolivia: the first Cd-member of the tetrahedrite group

Biagioni

Kasatkin

Sejkora

et al. 2022

MinMag

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Tennantite-(Cd), Cu10Cd2As4S13, was approved as a new mineral species from the Berenguela mining district, Pacajes Province, La Paz, Bolivia. It occurs as black metallic anhedral grains, up to 1 mm across, associated with baryte, montmorillonite, and secondary Cd-sulfates (aldridgeite, niedermayrite, and voudourisite). In reflected light, tennantite-(Cd) is isotropic, grey with brownish tints. Reflectance data for the four COM wavelengths in air are [λ (nm):

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“…Another example of such processes is the weathering of complex sulfides, such as minerals of the tetrahedrite–tennantite [(Cu,Fe,Zn,Hg,Ag) 12 (Sb,As) 4 S 13 ] group (Majzlan et al , 2018c; Keim et al , 2018). In the initial stages of such weathering, X-ray amorphous, nanocrystalline products are formed.…”

Section: Crystallisation From X-ray Amorphous Solid Precursorsmentioning

confidence: 99%

Processes of metastable-mineral formation in oxidation zones and mine waste

Majzlan

2020

MinMag

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Oxidation zones and mine wastes are metal-rich, near-surface environments, natural and man-made critical zones of ore deposits, respectively. They contain a number of minerals which, despite their metastability, occur consistently and in abundance. Field studies, presented as examples in this work, show that metastable minerals form not only directly from aqueous solutions, but also from more complex precursors, such as nanoparticles, gels, X-ray amorphous solids, or clusters. Initial precipitation of metastable phases and their conversion to stable phases is described by the Ostwald's step rule. Thermodynamic data show that there is a tendency, but no rule, that structurally more complex phases are also thermodynamically more stable. The Ostwald's step rule could then state that the initial metastable phases are structurally simple and easily assembled from aqueous solutions, nanoparticles, gels, disordered solids, or clusters. The structural similarity of the precursor and the forming phase is a kinetic factor favouring the crystallisation of the new phase. Calculation of saturation indices for mine drainage solutions show that they are mostly supersaturated with respect to the stable phases and the aqueous concentrations are sufficient to precipitate metastable minerals. In our fieldwork, we often encounter gelatinous substances with copper, manganese or tungsten that slowly convert to metastable oxysalt minerals. Another possibility is the crystallisation of various metastable minerals from solid, homogeneous ‘resins’ that are X-ray amorphous. Minerals typical for near-surface environments may be stabilised by their surface energy at high specific surface areas. For example, ferrihydrite is often described as a metastable phase but can be shown to be stable with respect to nanosised hematite.

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Synergies in elemental mobility during weathering of tetrahedrite [(Cu,Fe,Zn)12(Sb,As)4S13]: Field observations, electron microscopy, isotopes of Cu, C, O, radiometric dating, and water geochemistry

Cited by 19 publications

References 56 publications

Sequential chemical extraction and mineralogical bonding of metals from Styrian soils

Sequential chemical extraction and mineralogical bonding of metals from Styrian soils

Tennantite-(Cd), Cu₆(Cu₄Cd₂)As₄S₁₃, from the Berenguela mining district, Bolivia: the first Cd-member of the tetrahedrite group

Processes of metastable-mineral formation in oxidation zones and mine waste

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Synergies in elemental mobility during weathering of tetrahedrite [(Cu,Fe,Zn)12(Sb,As)4S13]: Field observations, electron microscopy, isotopes of Cu, C, O, radiometric dating, and water geochemistry

Cited by 19 publications

References 56 publications

Sequential chemical extraction and mineralogical bonding of metals from Styrian soils

Sequential chemical extraction and mineralogical bonding of metals from Styrian soils

Tennantite-(Cd), Cu6(Cu4Cd2)As4S13, from the Berenguela mining district, Bolivia: the first Cd-member of the tetrahedrite group

Processes of metastable-mineral formation in oxidation zones and mine waste

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Tennantite-(Cd), Cu₆(Cu₄Cd₂)As₄S₁₃, from the Berenguela mining district, Bolivia: the first Cd-member of the tetrahedrite group