New data on the composition of metacinnabar and Hg-sphalerite with an isomorphous Cd admixture

Васильев, В. И.

doi:10.1016/j.rgg.2011.06.002

Cited by 13 publications

(17 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Cadmium is suggested to conduct an isovalent substitution as Cd 2+ → Zn 2+ , or coupled with Fe as (Fe 2+ , Cd 2+ ) → Zn 2+ (Belissont et al, 2014; Cook et al, 2009; Vasil Ev, 2011). We would like to emphasize phenomena of the positive correlation between Cd and Zn (Figure 8f) and, the negative correlations between Cd and Fe, Cd and Mn (Figures 8e and 11f,g) in sphalerite from the Wunuer deposit, which were also reported in a great many of deposits (Belissont et al, 2014; Liu, Ye, Zhou, & Wang, 2010; Murakami & Ishihara, 2013; Ye et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

Textural, chemical, isotopic and microthermometric features of sphalerite from the Wunuer deposit, Inner Mongolia: Implications for two stages of mineralization from hydrothermal to epithermal

2020

View full text Add to dashboard Cite

The Wunuer Pb-Zn-Ag-Mo deposit is a newly explored polymetallic ore deposit located in the middle segment of the Great Xing'an Range, Inner Mongolia, NE China. Three stages of mineralization, composed of an early porphyry stage, an intermediate hydrothermal (cryptoexplosive breccia) stage, and a later epithermal stage, have been identified in the Wunuer deposit. Sphalerite is one of the principal metal sulphides in both hydrothermal and epithermal stages, and thus two generations of sphalerite, with the first-generation sphalerite (Sp1) precipitated in hydrothermal stage and the second-generation sphalerite (Sp2) precipitated in epithermal stage, were discriminated. The Sp1 is generally euhedral, transparent and colour-zoned, and is usually replaced by Sp2, galena and chalcopyrite. The Sp2 is generally anhedral, opaque and black in colour. Chalcopyrite inclusions in Sp1 and Sp2 have different genetic mechanisms: chalcopyrite inclusions in Sp1 were produced by replacement as the result of interaction of sphalerite with Cu-rich fluids, while chalcopyrite inclusions in Sp2 were produced by coprecipitation of sphalerite and chalcopyrite during crystal growth. Electron probe microscope analyser and laser ablation inductively coupled plasma mass spectrometry in-situ analysis techniques have been used to obtain chemical compositions of sphalerite. The Sp1 is enriched in Cd and In, and depleted in Mn, Fe, Cu, Ag, Sb and Pb. In contrast, the Sp2 is enriched in Mn, Fe, Cu, Ag, Sb and Pb, and depleted in Cd and In. Elements of Pb, Ag, Bi and some of Fe, Cu concentrated in Sp2 are greatly attributed to micro-mineral inclusions like chalcopyrite and galena, while most elements concentrated into Sp1 are generally incorporated into crystal structure in mechanisms of direct substitution (e.g. Fe 2+ ! Zn 2+) or coupled substitution ((Cu + + In 3+) ! 2Zn 2+). In-situ sulphur isotope results reveal similar slightly positive sulphur isotope compositions (+1.55‰ to +3.33‰ δ 34 S V-CDT for Sp1, and +1.71‰ to +2.34‰ δ 34 S V-CDT for Sp2) of the two generations of sphalerite, implying a magmatic material for both Sp1 and Sp2. Fluid inclusions in molybdenite-bearing quartz vein, Sp1 and Sp2-coexisting quartz have been studied to reveal fluid temperature and salinity evolution from porphyry to hydrothermal and to epithermal stage mineralization. Primary fluid inclusions in porphyry stage quartz homogenized to a liquid phase by high homogenization temperatures (range from 385 to 416 C, with an average of 399 C), with salinities ranging from 12.4 to 25.3 wt% (average of 19.4 wt%).

show abstract

Section: Discussionmentioning

confidence: 99%

Textural, chemical, isotopic and microthermometric features of sphalerite from the Wunuer deposit, Inner Mongolia: Implications for two stages of mineralization from hydrothermal to epithermal

2020

View full text Add to dashboard Cite

show abstract

“…In the Hg-Se-S series, Hg has a stable number of atoms and it shows continuous isomorphic substitution between Se and S, forming a wide range in selenium metacinnabar-tiemannite series. 15.80 wt %), depending on the temperatures of formation and Cd sources [10]. The EPMA data show that the Cd contents of sphalerite I (0.42-1.44 wt % Cd) and sphalerite II (0.26-1.25 wt % Cd) in the Chashula deposit are higher than sphalerite I (0.00-0.09 wt % Cd) in the Dongping deposit.…”

Section: Zn-hg-s and Hg-se-s Series Mineralsmentioning

confidence: 91%

“…The Cd contents of sphalerite II and metacinnabar can reach high values in Hg-rich and complex ores (up to 15.80 wt %), depending on the temperatures of formation and Cd sources [10]. The EPMA data show that the Cd contents of sphalerite I (0.42-1.44 wt % Cd) and sphalerite II (0.26-1.25 wt % Cd) in the Chashula deposit are higher than sphalerite I (0.00-0.09 wt % Cd) in the Dongping deposit.…”

Section: Hg Contents Of Sphalerite Reflect Spatial and Temporal Variamentioning

confidence: 99%

“…The Zn-Hg-S-Se component minerals form the ZnS (sphalerite)-HgS (metacinnabar) series and the HgS (metacinnabar)-HgSe (tiemannite) series [10]. Ores minerals of the Chashula and Dongping deposits, including sphalerite and cinnabar with Zn-bearing cinnabar, Hg-bearing sphalerite (sphalerite II), and selenium metacinnabar are plotted on a Zn-Hg-S-Se system diagram in Figure 13.…”

Section: Zn-hg-s and Hg-se-s Series Mineralsmentioning

confidence: 99%

See 1 more Smart Citation

Mineralogy of Zn–Hg–S and Hg–Se–S Series Minerals in Carbonate-Hosted Mercury Deposits in Western Hunan, South China

2017

View full text Add to dashboard Cite

Among the Zn-Hg-S and Hg-Se-S series minerals, Hg-bearing sphalerite and metacinnabar are uncommon in ore deposits, but they are useful indicators of temporal variation of ore forming fluids, as well as presenting metallurgical implications for Hg-bearing deposits. To understand the Hg-Zn-Se mineralization system of the Tongren-Fenghuang Hg Belt (TFHB), the Zn-Hg-S and Hg-Se-S series minerals of the Chashula Hg-Zn and Dongping Hg-Ag-Se carbonate-hosted deposits were studied by microscopic observation, electron-probe microanalysis, and X-ray diffraction analysis. Observations show that the Chashula and Dongping deposits experienced two stages of mineralization (Stages 1 and 2). The pyrite, sphalerite I (Hg-poor sphalerite), and quartz formed in Stage 1, while the Zn-bearing cinnabar, sphalerite II (Hg-bearing sphalerite), cinnabar, selenium metacinnabar, and Ag minerals formed in Stage 2. The Hg-bearing sphalerite, containing 13.36-22.26 wt % Hg (average 18.73 wt % Hg), replaces sphalerite I (0.00-1.31 wt % Hg). The Hg-bearing sphalerite of the Dongping Hg-Ag-Se deposit contains lower Hg (10.12-14.67 wt % Hg) than that of the Chashula deposit. The unit cell a of the Hg-bearing sphalerite gradually increases with increasing Hg content. The texture of the Zn-bearing cinnabar shows it is not stable and easily breaks down to Hg-bearing sphalerite and cinnabar through the chemical reaction: (Hg,Zn)S → (Zn,Hg)S + HgS. Selenium metacinnabar intergrowths with tetrahedrite and miargyrite were found only in the Dongping deposit. The selenium metacinnabar contains 76.57-83.97 wt % Hg, and extensive isomorphic substitution of .21 wt % Se, 4.14-10.32 wt % S). Based on our mineralogical studies, the Zn, Hg, Hg-Zn, and Hg-Se mineralization styles in the TFHB are interpreted as the product of different stages in the mineralization process.

show abstract

“…Impurities within the bulk are another factor that may have a significant impact on the stacking order of the ZnS layers. It was assumed in the past that under normal conditions another ZnS polymorph (matraite) could form in addition to sphalerite and wurtzite [13]. Currently, the matraite is identified as (111)-twined sphalerite [14], which twinning is likely forced by the admixtures of Fe, Mn, Cu, and In -the elements proned to accumulation in (111) plane of growing sphalerite.…”

Section: Introductionmentioning

confidence: 99%

Effect of nitrogen impurities on ZnS polymorphism

Popov¹,

Ворох²,

Enyashin³

2019

Nanosystems: Phys. Chem. Math.

View full text Add to dashboard Cite

The ZnS polymorphs-sphalerite and wurtzite-have the very close formation energies, setting their coexistence in nature. Moreover, numerous cases of a disordered phase formation based on these polymorphs have been registered. However, sphalerite is a common mineral, while wurtzite is rare. Perhaps the wider distribution of sphalerite can be explained by means of stabilizing effect from impurities. In this paper, the most stable form and the localization of nitrogen impurities in both ZnS polymorphs is screened using the methods of quantum chemistry. The influence of impurity on polymorphic wurtzite-sphalerite equilibrium is disclosed. According to the obtained results, the introduction of nitrogen impurities facilitates the domination of sphalerite over wurtzite.

show abstract

New data on the composition of metacinnabar and Hg-sphalerite with an isomorphous Cd admixture

Cited by 13 publications

References 11 publications

Textural, chemical, isotopic and microthermometric features of sphalerite from the Wunuer deposit, Inner Mongolia: Implications for two stages of mineralization from hydrothermal to epithermal

Textural, chemical, isotopic and microthermometric features of sphalerite from the Wunuer deposit, Inner Mongolia: Implications for two stages of mineralization from hydrothermal to epithermal

Mineralogy of Zn–Hg–S and Hg–Se–S Series Minerals in Carbonate-Hosted Mercury Deposits in Western Hunan, South China

Effect of nitrogen impurities on ZnS polymorphism

Contact Info

Product

Resources

About