Exploration potential of Cu isotope fractionation in porphyry copper deposits |
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Authors: | Ryan Mathur Spencer TitleyFernando Barra Susan BrantleyMarc Wilson Allison PhillipsFrancisco Munizaga Victor MaksaevJeff Vervoort Garret Hart |
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Institution: | Juniata College, Huntingdon PA |
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Abstract: | We examined the copper isotope ratio of primary high temperature Cu-sulfides, secondary low temperature Cu-sulfides (and Cu-oxides) as well as Fe-oxides in the leach cap, which represent the weathered remains of a spectrum of Cu mineralization, from nine porphyry copper deposits. Copper isotope ratios are reported as δ65Cu‰ = ((65Cu/63Cusample/65Cu/63CuNIST 976 standard) − 1) ? 103. Errors for all the analyses are ± 0.14‰ (determined by multiple analyses of the samples) and mass bias was corrected through standard-sample-standard bracketing. The overall isotopic variability measured in these samples range from − 16.96‰ to 9.98‰. |
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Keywords: | Copper isotope Porphyry copper Supergene Weathering |
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