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http://hdl.handle.net/11375/17899| Title: | Equilibrium Fractionation of Sulfur Isotopes Between Pyrite, Sphalerite and Galena as a function of Temperature. |
| Other Titles: | Equilibrium Fractionation of Sulfur Isotopes |
| Authors: | Grootenboer, John |
| Advisor: | Schwarcz, H. P. |
| Department: | Geology |
| Keywords: | fractionation, Sulfur Isotopes, sulfide mineral, mineraelogy, temperature, equilibration, sphalerite, pyrite, galena, sulfide phases, geothermometers, sulfide, mineral pair, Kinetic isotope effect, Diffusion, Thermal Diffusion, Solid Diffusion, Cross-Over Temperature, Pressure, Ideal Gas Assumption, Anharmonicity, Intra-molecular Fractionation, |
| Publication Date: | Nov-1969 |
| Abstract: | <p> The existence of significant and consistent fractionation of sulfur isotopes in natural coexisting sulfide mineral pairs is demonstrated. Such fractionations are shown to depend exclusively on the mineralogy of the assemblage and temperature of equilibration, consistent with a process of fractionation during equilibrium exchange of sulfur isotopes between the sulfide phases . The fractionation of sulfur isotopes between galena, sphalerite and pyrite has been determined experimentally over the temperature range 300-725°C . The fractionation for each mineral pair is shown to vary as T^(-2) so that three isotope geothermometer s have been calibrated. Experi mental results are applied to natural sulfide assemblages to determine the temperature of equilibration and extent to which isotopic equilibriurn has b een attained. </p> |
| URI: | http://hdl.handle.net/11375/17899 |
| Appears in Collections: | Open Access Dissertations and Theses |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Grootenboer_Johan_Nov1969_PhD.pdf | 56.18 MB | Adobe PDF | View/Open |
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