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Zn/Cd ratios and cadmium isotope evidence for the classification of lead-zinc deposits
Hanjie Wen; Chuanwei Zhu; Yuxu Zhang; Christophe Cloquet; Haifeng Fan; Shaohong Fu
2016
Source PublicationScientific Reports
Issue6Pages:1-8
Abstract
Lead-zinc deposits are often difficult to classify because clear criteria are lacking. In recent years, new tools, such as Cd and Zn isotopes, have been used to better understand the ore-formation processes and to classify Pb-Zn deposits. Herein, we investigate Cd concentrations, Cd isotope systematics and Zn/Cd ratios in sphalerite from nine Pb-Zn deposits divided into high-temperature systems (e.g., porphyry), low-temperature systems (e.g., Mississippi Valley type [MVT]) and exhalative systems (e.g., sedimentary exhalative [SEDEX]). Our results showed little evidence of fractionation in the high-temperature systems. In the low-temperature systems, Cd concentrations were the highest, but were also highly variable, a result consistent with the higher fractionation of Cd at low temperatures. The delta Cd-114/110 values in low-temperature systems were enriched in heavier isotopes (mean of 0.32 +/- 0.31 parts per thousand). Exhalative systems had the lowest Cd concentrations, with a mean delta Cd-114/110 value of 0.12 +/- 0.50 parts per thousand. We thus conclude that different ore-formation systems result in different characteristic Cd concentrations and fraction levels and that low-temperature processes lead to the most significant fractionation of Cd. Therefore, Cd distribution and isotopic studies can support better understanding of the geochemistry of ore-formation processes and the classification of Pb-Zn deposits.
Subject Area矿床地球化学
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/352002/6178
Collection矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文
矿床地球化学国家重点实验室
Recommended Citation
GB/T 7714
Hanjie Wen,Chuanwei Zhu,Yuxu Zhang,et al. Zn/Cd ratios and cadmium isotope evidence for the classification of lead-zinc deposits[J]. Scientific Reports,2016(6):1-8.
APA Hanjie Wen,Chuanwei Zhu,Yuxu Zhang,Christophe Cloquet,Haifeng Fan,&Shaohong Fu.(2016).Zn/Cd ratios and cadmium isotope evidence for the classification of lead-zinc deposits.Scientific Reports(6),1-8.
MLA Hanjie Wen,et al."Zn/Cd ratios and cadmium isotope evidence for the classification of lead-zinc deposits".Scientific Reports .6(2016):1-8.
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