Erratum to “On the problem of transport species of tungsten by hydrothermal solutions”

AbstractCoiraite, ideally (Pb,Sn2+)12.5As3Fe2+Sn4+S28, occurs as an economically important tin ore in the large Ag-Sn-Zn polymetallic Pirquitas deposit, Jujuy Province, NW-Argentina. The new mineral species is the As derivative of franckeite and belongs to the cylindrite group of complex Pb sulphosalts with incommensurate composite-layered structures. It is a primary mineral, frequently found in colloform textures, and formed from hydrothermal solutions at low temperature. Associated minerals are franckeite, cylindrite, pyrite-marcasite, as well as minor amounts of hocartite, Ag-rich rhodostannite. arsenopyrite and galena. Laminae of coiraite consist of extremely thin bent platy crystals up to 50 urn long. Electron microprobe analysis (n = 31) gave an empirical formula Pb11.21As2.99Ag0.13Fe1.10Sn6.13S28.0 close to the ideal formula (Pb11.3Sn2+1.2)Σ=12.5As3Fe2+Sn4+S28. Coiraite has two monoclinic sub-cells, Q (pseudotetragonal) and H (pseudohexagonal). Q: a 5.84(1) Å, b 5.86(1) Å, c 17.32(1) Å, β 94.14(1)°, F 590.05(3) Å3, Z = 4, a:b:c = 0.997:1:2.955; H (orthogonal setting): a 6.28(1) Å, b 3.66(1) Å, c 17.33(1) Å, β 91.46(1)°, V398.01(6) Å3, Z = 2, a∶b∶c = 1.716∶1∶4.735. The strongest Debye-Scherrer camera X-ray powder-diffraction lines [d in Å, (I), (hkl)] are: 5.78, (20), (Q and H 003); 4.34, (40), (Q 004); 3.46, (30), (Q and H 005); 3.339, (20), (Q 104); 2.876, (100), (Q and H 006); 2.068, (60), (Q 220).

Download Full-text

X-ray absorption spectroscopic studies of halide ion hydration in hydrothermal solutions

Geochimica et Cosmochimica Acta ◽

10.1016/j.gca.2006.06.1061 ◽

2006 ◽

Vol 70 (18) ◽

pp. A573 ◽

Cited By ~ 1

Author(s):

T.M. Seward ◽

C.M.B. Henderson ◽

O.M. Suleimenov ◽

J.M. Charnock

Keyword(s):

Spectroscopic Studies ◽

Hydrothermal Solutions ◽

Ion Hydration ◽

X Ray ◽

X Ray Absorption

Download Full-text

Organic acids in hydrothermal solutions; standard molal thermodynamic properties of carboxylic acids and estimates of dissociation constants at high temperatures and pressures

American Journal of Science ◽

10.2475/ajs.295.5.496 ◽

1995 ◽

Vol 295 (5) ◽

pp. 496-580 ◽

Cited By ~ 136

Author(s):

E. L. Shock

Keyword(s):

Thermodynamic Properties ◽

Organic Acids ◽

Carboxylic Acids ◽

High Temperatures ◽

Dissociation Constants ◽

Hydrothermal Solutions

Download Full-text

Epigenetic changes of acidic volcanites from the top of the Western Siberia Pre-Jurassic complex

Moscow University Bulletin. Series 4. Geology ◽

10.33623/0579-9406-2019-3-35-43 ◽

2019 ◽

pp. 35-43

Author(s):

A. V. Krasnova ◽

Yu. V. Rostovtseva ◽

A. E. Gavrilov

Keyword(s):

Low Temperature ◽

Western Siberia ◽

Hydrothermal Solutions ◽

Epigenetic Changes ◽

Reservoir Properties ◽

Tomsk Region

The study of secondary changes of acidic effusives with reservoir properties from the top of the Western Siberia pre-Jurassic complex (Tomsk Region) was produced. Lithological, petrographic and mineralogical features of these rocks indicate their change by low-temperature hydrothermal solutions, while weathering products, which are widely spread at the top of the basement, have not been clearly defined. Reservoir properties of studied rocks were formed probably due to fracturing and leaching.

Download Full-text

Mercury concentrations in thermal waters of the Bolshoi Semyachik hydrothermal system, Russia, Kamchatka.

10.5194/egusphere-egu21-15094 ◽

2021 ◽

Author(s):

Anton Nuzhdaev

Keyword(s):

Hydrothermal System ◽

Kamchatka Peninsula ◽

Hydrothermal Systems ◽

Thermal Waters ◽

Hydrothermal Solutions ◽

Average Value ◽

Thermal Fields ◽

Gas Jets ◽

First Time ◽

Hydrothermal Fields

The study of mercury receipt within volcanic activity zones and large hydrothermal systems recently causes the big interest connected with attempts of an estimation of volumes of natural mercury receipt on a daily surface.The hydrothermal system connected with volcanic massif Big Semyachik is one of the largest on the territory of Kamchatka peninsula. On the surface, the hydrothermal system is manifested by three large hydrothermal fields - the Verhnee Field, the parychay Dolina, and the Northern Crater of the Central Semyachik, the heat export from which is estimated at 300 MW (Vakin, 1976). On the surface of the thermal fields hot thermal waters and powerful steam-gas jets are unloaded.&#160; At the same time, due to the inaccessibility of thermal fields remain poorly studied, and in particular, there is no information on the concentrations of mercury in hydrothermal solutions.During fieldwork in 2020 all types of thermal waters were sampled, chemical types of waters were established, concentrations of mercury in hydrothermal solutions: for hot thermal waters the average value of mercury was - 0.44 mcg / L, and in steam-gas jets - the average value of mercury was - 4.60 mcg / L.Thus, in the course of the work the data on concentrations of mercury in hydrothermal solutions of one of the largest hydrothermal systems of Kamchatka were received for the first time.&#160;

Download Full-text