3D Plotting of Gold Solubility and Gold Fineness: Quantitative Analysis of Ore-Forming Conditions in Hydrothermal Gold Deposits
The 3D plotting of gold solubility and gold fineness aims to illustrate how to quantify their correlations with ore-forming conditions in hydrothermal gold deposits. The thermodynamic calculation of the Au-Ag solid solutions in Mathematica and the 3D plotting in MATLAB are used to build isopleths of...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
GeoScienceWorld
2023-09-01
|
| Series: | Lithosphere |
| Online Access: | https://pubs.geoscienceworld.org/gsa/lithosphere/article-pdf/doi/10.2113/2023/lithosphere_2023_208/6010000/lithosphere_2023_208.pdf |
| _version_ | 1797449137421025280 |
|---|---|
| author | Yi Liang Hangfei Ge Qiuming Pei Haonan Huang Kenichi Hoshino |
| author_facet | Yi Liang Hangfei Ge Qiuming Pei Haonan Huang Kenichi Hoshino |
| author_sort | Yi Liang |
| collection | DOAJ |
| description | The 3D plotting of gold solubility and gold fineness aims to illustrate how to quantify their correlations with ore-forming conditions in hydrothermal gold deposits. The thermodynamic calculation of the Au-Ag solid solutions in Mathematica and the 3D plotting in MATLAB are used to build isopleths of gold solubility and gold fineness at different temperatures (200℃, 400℃), pressures (0.1, 5 kbar), salinities (1, 40 wt% NaCl eq.), and sulfur concentrations (0.01, 0.5 mol/kg). The plot indicates that the ore-forming conditions have different correlations with gold solubility and gold fineness. Average rates of change for the correlations are quantified, showing distinct values in the four pH-logfO2 fields of (I) HSO4−, (II) SO42−, (III) H2S, and (IV) HS−, where dominant gold and silver complexes have different dependencies on the conditions. The quantification of the plots illustrates that a decrease in gold solubility by one order of magnitude is possibly caused by a decrease in temperature of ≥40℃, the salinity of ≥9.6 wt% NaCl eq. or sulfur concentration of ≥0.14 mol/kg, or an increase in pressure of ≥3 kbar, while a decrease in gold fineness by 100 units is possibly caused by a decrease in temperature of ≥14 ℃, pressure of ≥1.4 kbar, or salinity of ≥4 wt% NaCl eq., or an increase in sulfur concentration of ≥0.07 mol/kg. Quantification results suggest that a sharp decrease in temperature may result in large-scale gold mineralization and a great variation in gold fineness. In addition, the quantification reveals that the correlation between gold solubility and gold fineness can be expressed by a function, providing a rapid method for 3D plotting. |
| first_indexed | 2024-03-09T14:20:29Z |
| format | Article |
| id | doaj.art-4394335cc5d345a88f8574f564219576 |
| institution | Directory Open Access Journal |
| issn | 1941-8264 1947-4253 |
| language | English |
| last_indexed | 2024-03-09T14:20:29Z |
| publishDate | 2023-09-01 |
| publisher | GeoScienceWorld |
| record_format | Article |
| series | Lithosphere |
| spelling | doaj.art-4394335cc5d345a88f8574f5642195762023-11-28T13:27:48ZengGeoScienceWorldLithosphere1941-82641947-42532023-09-012023110.2113/2023/lithosphere_2023_2083D Plotting of Gold Solubility and Gold Fineness: Quantitative Analysis of Ore-Forming Conditions in Hydrothermal Gold DepositsYi Liang0https://orcid.org/0000-0001-5852-2045Hangfei Ge1Qiuming Pei2Haonan Huang3Kenichi Hoshino4Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, ChinaFaculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, ChinaFaculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, ChinaFaculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, ChinaDepartment of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, Hiroshima 739-8526, JapanThe 3D plotting of gold solubility and gold fineness aims to illustrate how to quantify their correlations with ore-forming conditions in hydrothermal gold deposits. The thermodynamic calculation of the Au-Ag solid solutions in Mathematica and the 3D plotting in MATLAB are used to build isopleths of gold solubility and gold fineness at different temperatures (200℃, 400℃), pressures (0.1, 5 kbar), salinities (1, 40 wt% NaCl eq.), and sulfur concentrations (0.01, 0.5 mol/kg). The plot indicates that the ore-forming conditions have different correlations with gold solubility and gold fineness. Average rates of change for the correlations are quantified, showing distinct values in the four pH-logfO2 fields of (I) HSO4−, (II) SO42−, (III) H2S, and (IV) HS−, where dominant gold and silver complexes have different dependencies on the conditions. The quantification of the plots illustrates that a decrease in gold solubility by one order of magnitude is possibly caused by a decrease in temperature of ≥40℃, the salinity of ≥9.6 wt% NaCl eq. or sulfur concentration of ≥0.14 mol/kg, or an increase in pressure of ≥3 kbar, while a decrease in gold fineness by 100 units is possibly caused by a decrease in temperature of ≥14 ℃, pressure of ≥1.4 kbar, or salinity of ≥4 wt% NaCl eq., or an increase in sulfur concentration of ≥0.07 mol/kg. Quantification results suggest that a sharp decrease in temperature may result in large-scale gold mineralization and a great variation in gold fineness. In addition, the quantification reveals that the correlation between gold solubility and gold fineness can be expressed by a function, providing a rapid method for 3D plotting.https://pubs.geoscienceworld.org/gsa/lithosphere/article-pdf/doi/10.2113/2023/lithosphere_2023_208/6010000/lithosphere_2023_208.pdf |
| spellingShingle | Yi Liang Hangfei Ge Qiuming Pei Haonan Huang Kenichi Hoshino 3D Plotting of Gold Solubility and Gold Fineness: Quantitative Analysis of Ore-Forming Conditions in Hydrothermal Gold Deposits Lithosphere |
| title | 3D Plotting of Gold Solubility and Gold Fineness: Quantitative Analysis of Ore-Forming Conditions in Hydrothermal Gold Deposits |
| title_full | 3D Plotting of Gold Solubility and Gold Fineness: Quantitative Analysis of Ore-Forming Conditions in Hydrothermal Gold Deposits |
| title_fullStr | 3D Plotting of Gold Solubility and Gold Fineness: Quantitative Analysis of Ore-Forming Conditions in Hydrothermal Gold Deposits |
| title_full_unstemmed | 3D Plotting of Gold Solubility and Gold Fineness: Quantitative Analysis of Ore-Forming Conditions in Hydrothermal Gold Deposits |
| title_short | 3D Plotting of Gold Solubility and Gold Fineness: Quantitative Analysis of Ore-Forming Conditions in Hydrothermal Gold Deposits |
| title_sort | 3d plotting of gold solubility and gold fineness quantitative analysis of ore forming conditions in hydrothermal gold deposits |
| url | https://pubs.geoscienceworld.org/gsa/lithosphere/article-pdf/doi/10.2113/2023/lithosphere_2023_208/6010000/lithosphere_2023_208.pdf |
| work_keys_str_mv | AT yiliang 3dplottingofgoldsolubilityandgoldfinenessquantitativeanalysisoforeformingconditionsinhydrothermalgolddeposits AT hangfeige 3dplottingofgoldsolubilityandgoldfinenessquantitativeanalysisoforeformingconditionsinhydrothermalgolddeposits AT qiumingpei 3dplottingofgoldsolubilityandgoldfinenessquantitativeanalysisoforeformingconditionsinhydrothermalgolddeposits AT haonanhuang 3dplottingofgoldsolubilityandgoldfinenessquantitativeanalysisoforeformingconditionsinhydrothermalgolddeposits AT kenichihoshino 3dplottingofgoldsolubilityandgoldfinenessquantitativeanalysisoforeformingconditionsinhydrothermalgolddeposits |