THERMODYNAMIC PROPERTIES OF SILVER AND BISMUTH SULFOSALT MINERALS, PAVONITE (AgBi3S5) AND MATILDITE (AgBiS2) AND IMPLICATIONS FOR ORE DEPOSITS

@article{Voronin2013THERMODYNAMICPO,
  title={THERMODYNAMIC PROPERTIES OF SILVER AND BISMUTH SULFOSALT MINERALS, PAVONITE (AgBi3S5) AND MATILDITE (AgBiS2) AND IMPLICATIONS FOR ORE DEPOSITS},
  author={Mikhail V. Voronin and Evgeniy G. Osadchii},
  journal={Economic Geology},
  year={2013},
  volume={108},
  pages={1203-1210}
}
Although Bi-Ag sulfides often occur in many types of hydrothermal Au-Ag ore deposits, their stability and phase relationships are insufficiently quantified. We employed the electromotive force (emf) method to measure the thermodynamic properties of pavonite (AgBi3S5) and matildite (AgBiS2), which are the two main ternary mineral phases in the Ag-Bi-S system. These new results, coupled with a critical analysis of literature data, allow generation of a consistent set of thermodynamic values in… 

Figures and Tables from this paper

Electrochemical study of the thermodynamic properties of matildite (β-AgBiS2) in different temperature and compositional ranges

Thermodynamic properties of matildite (β-AgBiS2) in equilibrium with sulfur and bismuth have been studied by an EMF method, using the fast Ag+ ion-conducting solid electrolytes AgI and RbAg4I5. The

Thermochemical properties of selected ternary phases in the Ag–Bi–S system

Thermodynamic properties of the equilibrium phases matildite (β-AgBiS2), schapbachite (α-AgBiS2), and pavonite (AgBi3S5) with their stoichiometric variations have been studied. The ternary phase

Thermochemical properties of silver tellurides including empressite (AgTe) and phase diagrams for Ag–Te and Ag–Te–O

This study compiles original experimental and literature data on the thermodynamic properties (ΔfG°, S°, ΔfH°) of silver tellurides (α-Ag2Te, β-Ag2Te, Ag1.9Te, Ag5Te3, AgTe) obtained by the method of

The Equilibrium Phase Formation and Thermodynamic Properties of Functional Tellurides in the Ag–Fe–Ge–Te System

Equilibrium phase formations below 600 K in the parts Ag2Te–FeTe2–F1.12Te–Ag2Te and Ag8GeTe6–GeTe–FeTe2–AgFeTe2–Ag8GeTe6 of the Fe–Ag–Ge–Te system were established by the electromotive force (EMF)

Thermodynamic Properties of Layered Tetradymite-like Compounds of the Ag–Ge–Sb–Te System

The phase equilibria of the Ag–Ge–Sb–Te system in the part Ag8GeTe6–Ge–GeTe–Sb2Te3 were investigated by the electromotive force (EMF) method. The determined phase relations were used to express the

Experimental Thermodynamic Characterization of the Chalcopyrite-Based Compounds in the Ag–In–Te System for a Potential Thermoelectric Application

The equilibrium concentration space of the Ag–In–Te system in the part AgInTe2–Te–In2Te3 was studied through the modified solid-state electromotive force (EMF) method by dividing

Bi/Te control on gold mineralizing processes in the North China Craton: Insights from the Wulong gold deposit

The Wulong gold deposit (> 80 t Au) is located at the northeastern margin of the North China Craton (NCC). Gold in the most economically important quartz veins (Stages 2 and 3) is associated with a

References

SHOWING 1-10 OF 46 REFERENCES

Standard enthalpies of formation of sulfides and sulfosalts in the Ag-Bi-S system by high-temperature, direct synthesis calorimetry

Standard enthalpies of formation of sulfides and sulfosalts on the quasi-binary Ag 2 S-Bi 2 S 3 join have been determined experimentally using the technique of high-temperature, direct synthesis drop

Two Se‐bearing Ag–Bi Sulphosalts, Benjaminite and Matildite from the Ikuno Deposits, Hyogo Prefecture, Japan –Au–Ag Mineralization in Polymetallic Zone

Abstract: Se‐bearing benjaminite and matildite are described from the polymetallic zone of the Ikuno deposits, Japan. The former is the first occurrence in Japan, and is from two separate veins, the

The system Ag-Au-Se: Phase relations below 405 K and determination of standard thermodynamic properties of selenides by solid-state galvanic cell technique

Abstract The existence of the only ternary compound, Ag3AuSe2 (fischesserite), in the Ag-Au-Se system was confirmed by solid-state annealing method. The selenium analog of petrovskaite (AgAuS) was

Modeling of gold scavenging by bismuth melts coexisting with hydrothermal fluids

The effect of gold scavenging by bismuth melts is investigated using equilibrium thermodynamic modeling of an aqueous solution–mineral–melt system. The calculations for the Au-Bi-Na-Cl-S-H-O system,

Determination of standard thermodynamic properties of sulfides in the Ag-Au-S system by means of a solid-state galvanic cell

Abstract Thermodynamic properties of the following phase reactions in the Ag-Au-S system have been investigated via electromotive force (EMF) measurements in solid-state galvanic cells with Ag4RbI5

Gold-bismuth-telluride-sulphide assemblages at the Viceroy Mine, Harare-Bindura-Shamva greenstone belt, Zimbabwe

Abstract Gold mineralization at the Viceroy Mine is hosted in extensional veins in steep shear zones that transect metabasalts of the Archaean Arcturus Formation. The gold mineralization is generally

Thermochemical Data for Sulfosalt Ore Minerals; formation from Simple Sulfides

Free energies of reaction of simple metal sulfides to form sulfosalt phases in the Ag-Bi-S, Cu-Bi-S, Pb-Bi-S systems at 510 degrees C and the Pb-Sb-S, Sr-Sb-S, and Ag-Sb-S systems at 400 degrees C

The Kalguty complex deposit, the Gorny Altai: Mineralogical and geochemical characteristics and fluid regime of ore formation

The results of detailed mineralogical, geochemical, and thermobarogeochemical studies of the Kalguty complex greisen deposit are presented. The chemical compositions of ore veins, greisens, and other

Phase relations and mineral assemblages in the Ag-Bi-Pb-S system

Phase relations within the Ag-Bi-S, Bi-Pb-S, and Ag-Pb-S systems have been determined in evacuated silica tube experiments. Integration of experimental data from these systems has permitted

Thermochemical Approximations for Sulfosalts

Most sulfosalts may be regarded as intermediate phases on joins between simple sulfide components (e.g., all lead sulfbismuthinides lie on the PbS-Bi 2 S 3 join). Many of the structures are