Sulfide minerals in the Menez Gwen nonmetallic hydrothermal field (Mid-Atlantic Ridge)

Lein, Alla Yu; Bogdanov, Yu. A.; Масленников, В. В.; Syaoli, Li; Ul'yanova, Nina; Масленникова, С. П.; Ulyanov, A. A.

doi:10.1134/s0024490210040012

Cited by 31 publications

(23 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High Co in this study is exclusively associated with high-temperature sites (~400 • C) at MORs (Logatchev and Turtle Pits: (500 to 1000 ppm, Figure 9)), consistent with observations in the literature [108,[113][114][115] and attributed to the solubility of cobalt at high temperature [116,117]. The presence of Ni is exclusively associated with ultramafic-hosted settings (here Logatchev, Figure 9) where Cu, Co and Bi are also enriched (Figure 9), which is in agreement with other studies at Logatchev [66,77,83,118] as well as other ultramafic-hosted sites including Rainbow Vent, Mid-Atlantic Ridge (see Figure 6A: middle grey symbols, [114,119,120]). Ultramafic-hosted as well as mature SMS deposits (LG, TAG) demonstrate a distinct absence of As, Sb, Pb, Hg, Ag, Mn and Cd when compared to other settings; consistent with the primitive host rock from these sites.…”

Section: Control Of Geological Setting On Trace Element Distributionsupporting

confidence: 92%

“…Zinc concentrations in chalcopyrite from our dataset are variable (1 ppm up to 1 wt % Zn). This is consistent with observations of Zn in chalcopyrite from the literature ( Figure 4A; [77,84,114,115,120,128,147]. Chalcopyrite from arc-related deposits often shows the highest concentrations of Sb, As, Pb and Ag; in particular-As and Sb, where concentrations >1 wt % have been observed ( Figure 5A).…”

Section: Pyrrhotite (Pb Co Ni Cu and Zn)supporting

confidence: 91%

See 1 more Smart Citation

Geological, Mineralogical and Textural Impacts on the Distribution of Environmentally Toxic Trace Elements in Seafloor Massive Sulfide Occurrences

et al. 2019

View full text Add to dashboard Cite

With mining of seafloor massive sulfides (SMS) coming closer to reality, it is vital that we have a good understanding of the geochemistry of these occurrences and the potential toxicity impact associated with mining them. In this study, SMS samples from seven hydrothermal fields from various tectonic settings were investigated by in-situ microanalysis (electron microprobe (EMPA) and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS)) to highlight the distribution of potentially-toxic trace elements (Cu, Zn, Pb, Mn, Cd, As, Sb, Co, Ni, Bi, Ag and Hg) within the deposits, their minerals and textures. We demonstrate that a combination of mineralogy, trace element composition and texture characterisation of SMS from various geotectonic settings, when considered along with our current knowledge of oxidation rates and galvanic coupling, can be used to predict potential toxicity of deposit types and individual samples and highlight which may be of environmental concern. Although we cannot quantify toxicity, we observe that arc-related sulfide deposits have a high potential toxicity when compared with deposits from other tectonic settings based on their genetic association of a wide range of potentially toxic metals (As, Sb, Pb, Hg, Ag and Bi) that are incorporated into more reactive sulfosalts, galena and Fe-rich sphalerite. Thus, deposits such as these require special care when considered as mining targets. In contrast, the exclusive concern of ultra-mafic deposits is Cu, present in abundant, albeit less reactive chalcopyrite, but largely barren of other metals such as As, Pb, Sb, Cd and Hg. Whilst geological setting does dictate metal endowment, ultimately mineralogy is the largest control of trace element distribution and subsequent potential toxicity. Deposits containing abundant pyrrhotite (high-temperature deposits) and Fe-rich sphalerite (ubiquitous to all SMS deposits) as well as deposits with abundant colloform textures also pose a higher risk. This type of study can be combined with “bulk lethal toxicity” assessments and used throughout the stages of a mining project to help guide prospecting and legislation, focus exploitation and minimise environmental impact.

show abstract

Section: Control Of Geological Setting On Trace Element Distributionsupporting

confidence: 92%

Section: Pyrrhotite (Pb Co Ni Cu and Zn)supporting

confidence: 91%

Geological, Mineralogical and Textural Impacts on the Distribution of Environmentally Toxic Trace Elements in Seafloor Massive Sulfide Occurrences

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Inclusions of native gold and tennantite were revealed by SEM in the barite-chalcopyrite-rich chimney fragments collected from sulfide-barite breccias of the Menez Gwen vent site (Lein et al, 2010;Fig. 7l).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…Supposed color of the smokers: bs -black, gs -grey, ws -white (greish), csclear. (Detrick et al, 1986;Hannington and Scott, 1988;Hannington et al, 1991;Shadlun et al, 1993;Duckworth et al, 1995;Mozgova et al, 1996;Scott, 1997;Petersen et al, 2003;Vikentyev, 2004;Borodaev et al, 2004;Lein et al, 2010;Binns, 2014;Bogdanov et al, 2015;Fouquet et al, 2010;Monecke et al, 2016). The reference include data on color of the smokers: bs -black; gs -gray; ws -white (grayish white); cs -clear; bgs -black or gray.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Chimneys in Paleozoic massive sulfide mounds of the Urals VMS deposits: Mineral and trace element comparison with modern black, grey, white and clear smokers

Масленников

Масленникова

Large

et al. 2017

Ore Geology Reviews

105

View full text Add to dashboard Cite

“…Processes such as cooling, boiling, mixing, and fluid-rock interactions are key for sulfide precipitation in hydrothermal systems, as they can influence the main parameters above [7][8][9]. Previous studies suggest that the recognition of distinct trace element signatures of individual sulfide grains from seafloor hydrothermal systems can assist with tracking sequences of crystallization and stages of mineralization, sources of metals, and evolution of ore-forming fluids over time in SMS deposits (e.g., [10][11][12]). Recent work by Wohlgemuth-Ueberwasser et al (2015) [13], Keith et al (2016) [8], [14], and Wang et al (2017) [15] investigated trace element distributions using laser ablation ICP-MS analysis in sulfide minerals from SMS deposits in different geodynamic settings including ultramafic-hosted and basalt-hosted fields as well as a number of fields that are associated with submarine volcanic arcs and back-arc basins.…”

Section: Introductionmentioning

confidence: 99%

Trace Metal Distribution in Sulfide Minerals from Ultramafic-Hosted Hydrothermal Systems: Examples from the Kairei Vent Field, Central Indian Ridge

et al. 2018

View full text Add to dashboard Cite

The ultramafic-hosted Kairei vent field is located at 25°19′ S, 70°02′ E, towards the Northern end of segment 1 of the Central Indian Ridge (CIR-S1) at a water depth of ~2450 m. This study aims to investigate the distribution of trace elements among sulfide minerals of differing textures and to examine the possible factors controlling the trace element distribution in those minerals using LA-ICP-MS spot and line scan analyses. Our results show that there are distinct systematic differences in trace element distributions throughout the different minerals, as follows: (1) pyrite is divided into three types at Kairei, including early-stage euhedral pyrite (py-I), sub-euhedral pyrite (py-II), and colloform pyrite (py-III). Pyrite is generally enriched with Mo, Au, As, Tl, Mn, and U. Pyrite-I has high contents of Se, Te, Bi, and Ni when compared to the other types; py-II is enriched in Au relative to py-I and py-III, but poor in Ni; py-III is enriched in Mo, Pb, and U but is poor in Se, Te, Bi, and Au relative to py-I and py-II. Variations in the concentrations of Se, Te, and Bi in pyrite are most likely governed by the strong temperature gradient. There is generally a lower concentration of nickel than Co in pyrite, indicating that our samples precipitated at high temperatures, whereas the extreme Co enrichment is likely from a magmatic heat source combined with an influence of serpentinization reactions. (2) Chalcopyrite is characterized by high concentrations of Co, Se, and Te. The abundance of Se and Te in chalcopyrite over the other minerals is interpreted to have been caused by the high solubilities of Se and Te in the chalcopyrite lattice at high temperatures. The concentrations of Sb, As, and Au are relatively low in chalcopyrite from the Kairei vent field. (3) Sphalerite from Zn-rich chimneys is characterized by high concentrations of Sn, Co, Ga, Ge, Ag, Pb, Sb, As, and Cd, but is depleted in Se, Te, Bi, Mo, Au, Ni, Tl, Mn, Ba, V, and U in comparison with the other minerals. The high concentrations of Cd and Co are likely caused by the substitution of Cd2+ and Co2+ for Zn2+ in sphalerite. A high concentration of Pb accompanied by a high Ag concentration in sphalerite indicates that Ag occurs as Pb–Ag sulfosalts. Gold is generally low in sphalerite and strongly correlates with Pb, suggesting its presence in microinclusions of galena. The strong correlation of As with Ge in sphalerite from Kairei suggests that they might precipitate at medium temperatures and under moderately reduced conditions. (4) Bornite–digenite has very low concentrations of most trace elements, except for Co, Se, and Bi. Serpentinization in ultramafic-hosted hydrothermal systems might play an important role in Au enrichment in pyrite with low As contents. Compared to felsic-hosted seafloor massive sulfide deposits, sulfide minerals from ultramafic-hosted deposits show higher concentrations of Se and Te, but lower As, Sb, and Au concentrations, the latter often attributed to the contribution of magmatic volatiles. As with typical ultramafic-hosted seafloor massive sulfide deposits, Se enrichment in chalcopyrite from Kairei indicates that the primary factor that controls the Se enrichment is temperature-controlled mobility in vent fluids.

show abstract

Sulfide minerals in the Menez Gwen nonmetallic hydrothermal field (Mid-Atlantic Ridge)

Cited by 31 publications

References 7 publications

Geological, Mineralogical and Textural Impacts on the Distribution of Environmentally Toxic Trace Elements in Seafloor Massive Sulfide Occurrences

Geological, Mineralogical and Textural Impacts on the Distribution of Environmentally Toxic Trace Elements in Seafloor Massive Sulfide Occurrences

Chimneys in Paleozoic massive sulfide mounds of the Urals VMS deposits: Mineral and trace element comparison with modern black, grey, white and clear smokers

Trace Metal Distribution in Sulfide Minerals from Ultramafic-Hosted Hydrothermal Systems: Examples from the Kairei Vent Field, Central Indian Ridge

Contact Info

Product

Resources

About